Oakley City Council
October 13, 2026

Planning Survey Report Form, Revised July 2015
• Delay construction near occupied
sites until hibernation or nursery
seasons are over
Swainson’s
Hawk
Large trees
within 1,000
feet of the
project site
provide
potential
nesting habitat
for this species.
• Determine whether potential
nests are occupied
• No construction within 1,000 ft of
occupied nests within breeding
season (March 15 - Sep 15)
• If necessary, remove active nest
tree after nesting season to
prevent occupancy in second year.
• Establish 1,000 ft buffer around
active nest and monitor
compliance (no activity within
established buffer)
pp. 6-41
to 6-43
Golden
Eagle
Large trees
within 0.5 miles
of the project
site provide
potential
nesting habitat
for this species.
• Establish presence/absence of
nesting eagles
• No construction within ½ mile near
active nests (most activity late Jan
– Aug)
• Establish ½ mile buffer around
active nest and monitor
compliance with buffer
pp. 6-38
to 6-39
273

Planning Survey Report Form, Revised July 2015
2) Required Preconstruction Surveys, Avoidance and Minimization, and Construction Monitoring All preconstruction surveys shall be conducted in accordance with the requirements set forth in Section 6.4.3, Species-Level Measures, and Table 6-1 of the ECCC HCP/NCCP. Detailed descriptions of preconstruction surveys, avoidance and minimization, and construction monitoring applicable to each of the wildlife species in Table 3 are located below. Please remove the species-specific measures that do not apply to your project (highlight entire section and delete).

WESTERN BURROWING OWL
Preconstruction Surveys
Prior to any ground disturbance related to covered activities, a USFWS/CDFW- approved biologist will conduct a preconstruction survey in areas identified in the planning surveys as having potential burrowing owl habitat. The surveys will establish the presence or absence of western burrowing owl and/or habitat features and evaluate use by owls in accordance with CDFW survey guidelines (California Department of Fish and Game 1995).

On the parcel where the activity is proposed, the biologist will survey the proposed disturbance footprint and a 500- foot radius from the perimeter of the proposed footprint to identify burrows and owls. Adjacent parcels under different land ownership will not be surveyed. Surveys should take place near sunrise or sunset in accordance with CDFW guidelines. All burrows or burrowing owls will be identified and mapped. Surveys will take place no more than 30 days prior to construction. During the breeding season (February 1– August 31), surveys will document whether burrowing owls are nesting in or directly adjacent to disturbance areas. During the nonbreeding season (September 1–January 31), surveys will document whether burrowing owls are using habitat in or directly adjacent to any disturbance area. Survey results will be valid only for the season (breeding or nonbreeding) during which the survey is conducted.

Avoidance and Minimization and Construction Monitoring
This measure incorporates avoidance and minimization guidelines from CDFW’s Staff Report on Burrowing Owl Mitigation (California Department of Fish and Game 1995).

If burrowing owls are found during the breeding season (February 1 – August 31), the project proponent will avoid all nest sites that could be disturbed by project construction during the remainder of the breeding season or while the nest is occupied by adults or young. Avoidance will include establishment of a non-disturbance buffer zone (described below). Construction may occur during the breeding season if a qualified biologist monitors the nest and determines that the birds have not begun egg-laying and incubation or that the juveniles from the occupied burrows have fledged. During the nonbreeding season (September 1 – January 31), the project proponent should avoid the owls and the burrows they are using, if possible. Avoidance will include the establishment of a buffer zone (described below).

During the breeding season, buffer zones of at least 250 feet in which no construction activities can occur will be established around each occupied burrow (nest site). Buffer zones of 160 feet will be established around each burrow being used during the nonbreeding season. The buffers will be delineated by highly visible, temporary construction fencing.

If occupied burrows for burrowing owls are not avoided, passive relocation will be implemented. Owls should be excluded from burrows in the immediate impact zone and within a 160-foot buffer zone by installing one-way doors in burrow entrances. These doors should be in place for 48 hours prior to excavation. The project area should be monitored daily for 1 week to confirm that the owl has abandoned the burrow. Whenever possible, burrows should be excavated using hand tools and refilled to prevent reoccupation (California Department of Fish and Game 1995).

Plastic tubing or a similar structure should be inserted in the tunnels during excavation to maintain an escape route for any owls inside the burrow.

SWAINSON’S HAWK
Preconstruction Survey
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Planning Survey Report Form, Revised July 2015
Prior to any ground disturbance related to covered activities that occurs during the nesting season (March 15– September 15), a qualified biologist will conduct a preconstruction survey no more than 1 month prior to construction to establish whether Swainson’s hawk nests within 1,000 feet of the project site are occupied. If potentially occupied nests within 1,000 feet are off the project site, then their occupancy will be determined by observation from public roads or by observations of Swainson’s hawk activity (e.g., foraging) near the project site. If nests are occupied, minimization measures and construction monitoring are required (see below).

Avoidance and Minimization and Construction Monitoring
During the nesting season (March 15–September 15), covered activities within 1,000 feet of occupied nests or nests under construction will be prohibited to prevent nest abandonment. If site-specific conditions or the nature of the covered activity (e.g., steep topography, dense vegetation, limited activities) indicate that a smaller buffer could be used, the Implementing Entity will coordinate with CDFW/USFWS to determine the appropriate buffer size.

If young fledge prior to September 15, covered activities can proceed normally. If the active nest site is shielded from view and noise from the project site by other development, topography, or other features, the project applicant can apply to the Implementing Entity for a waiver of this avoidance measure. Any waiver must also be approved by USFWS and CDFW. While the nest is occupied, activities outside the buffer can take place.

All active nest trees will be preserved on site, if feasible. Nest trees, including non-native trees, lost to covered activities will be mitigated by the project proponent according to the requirements below.

Mitigation for Loss of Nest Trees
The loss of non-riparian Swainson’s hawk nest trees will be mitigated by the project proponent by:
• If feasible on-site, planting 15 saplings for every tree lost with the objective of having at least 5 mature trees established for every tree lost according to the requirements listed below.

AND either
1) Pay the Implementing Entity an additional fee to purchase, plant, maintain, and monitor 15 saplings on the HCP/NCCP Preserve System for every tree lost according to the requirements listed below, OR 2) The project proponent will plant, maintain, and monitor 15 saplings for every tree lost at a site to be approved by the Implementing Entity (e.g., within an HCP/NCCP Preserve or existing open space linked to HCP/NCCP preserves), according to the requirements listed below.

The following requirements will be met for all planting options:
• Tree survival shall be monitored at least annually for 5 years, then every other year until year 12. All trees lost during the first 5 years will be replaced. Success will be reached at the end of 12 years if at least 5 trees per tree lost survive without supplemental irrigation or protection from herbivory. Trees must also survive for at least three years without irrigation.
• Irrigation and fencing to protect from deer and other herbivores may be needed for the first several years to ensure maximum tree survival.
• Native trees suitable for this site should be planted. When site conditions permit, a variety of native trees will be planted for each tree lost to provide trees with different growth rates, maturation, and life span, and to provide a variety of tree canopy structures for Swainson’s hawk. This variety will help to ensure that nest trees will be available in the short term (5-10 years for cottonwoods and willows) and in the long term (e.g., Valley oak, sycamore). This will also minimize the temporal loss of nest trees. • Riparian woodland restoration conducted as a result of covered activities (i.e., loss of riparian woodland) can be used to offset the nest tree planting requirement above, if the nest trees are riparian species. • Whenever feasible and when site conditions permit, trees should be planted in clumps together or with existing trees to provide larger areas of suitable nesting habitat and to create a natural buffer between nest trees and adjacent development (if plantings occur on the development site). • Whenever feasible, plantings on the site should occur closest to suitable foraging habitat outside the UDA. • Trees planted in the HCP/NCCP preserves or other approved offsite location will occur within the known range of Swainson’s hawk in the inventory area and as close as possible to high-quality foraging habitat. 275

Planning Survey Report Form, Revised July 2015

GOLDEN EAGLE
Preconstruction Survey
Prior to implementation of covered activities, a qualified biologist will conduct a preconstruction survey to establish whether nests of golden eagles are occupied (see Section 6.3.1, Planning Surveys). If nests are occupied, minimization requirements and construction monitoring will be required.

Avoidance and Minimization
Covered activities will be prohibited within 0.5 mile of active nests. Nests can be built and active at almost any time of the year, although mating and egg incubation occurs late January through August, with peak activity in March through July. If site-specific conditions or the nature of the covered activity (e.g., steep topography, dense vegetation, limited activities) indicate that a smaller buffer could be appropriate or that a larger buffer should be implemented, the Implementing Entity will coordinate with CDFW/USFWS to determine the appropriate buffer size.

Construction Monitoring
Construction monitoring will focus on ensuring that no covered activities occur within the buffer zone established around an active nest. Although no known golden eagle nest sites occur within or near the ULL, covered activities inside and outside of the Preserve System have the potential to disturb golden eagle nest sites. Construction monitoring will ensure that direct effects to golden eagles are minimized. 3) Construction Monitoring Plan
Before implementing a covered activity, the applicant will develop and submit a construction monitoring plan to the planning department of the local land use jurisdiction and the East Contra Costa County Habitat Conservancy for review and approval. Elements of a brief construction monitoring plan will include the following:
• Results of planning and preconstruction surveys.11
• Description of avoidance and minimization measures to be implemented, including a description of project-specific refinements to the measures or additional measures not included in the HCP/NCCP. • Description of monitoring activities, including monitoring frequency and duration, and specific activities to be monitored.
• Description of the onsite authority of the construction monitor to modify implementation of the activity.

Check box to acknowledge this requirement.
11 If the preconstruction surveys do not trigger construction monitoring, results of preconstruction surveys should still be submitted to the local jurisdiction and the East Contra Costa County Habitat Conservancy.
276

Planning Survey Report Form, Revised July 2015
V. SPECIFIC CONDITIONS ON COVERED ACTIVITIES
1) Check off the HCP conservation measures that apply to the project.

APPLIES TO ALL PROJECTS
Conservation Measure 1.11. Avoid Direct Impacts on Extremely Rare Plants, Fully Protected Wildlife Species, or Migratory Birds. This conservation measure applies to all projects. All projects will avoid all impacts on extremely rare plants and fully protected species listed in Table 6-5 of the ECCC HCP/NCCP. See HCP pp. 6-23 to 6-25, and Table 6-5.

APPLIES TO PROJECTS THAT IMPACT COVERED PLANT SPECIES
Conservation Measure 3.10. Plant Salvage when Impacts are Unavoidable. This condition applies to projects that cannot avoid impacts on covered plants and help protect covered plants by prescribing salvage whenever avoidance of impacts is not feasible. Project proponents wishing to remove populations of covered plants must notify the Conservancy of their construction schedule to allow the Conservancy the option of salvaging the populations. See HCP pp. 6-48 to 6-50.

APPLIES TO PROJECTS THAT INCLUDE ARE ADJACENT TO STREAMS, PONDS, OR WETLANDS Conservation Measure 2.12. Wetland, Pond, and Stream Avoidance and Minimization. All projects will implement measures described in the HCP to avoid and minimize impacts on wetlands, ponds, streams, and riparian woodland/scrub. See HCP pp. 6-33 to 6-35.

APPLIES TO NEW DEVELOPMENT PROJECTS
Conservation Measure 1.10. Maintain Hydrologic Conditions and Minimize Erosion. All new development must avoid or minimize direct and indirect impacts on local hydrological conditions and erosion by incorporating the applicable Provision C.3 Amendments of the Contra Costa County Clean Water Program’s (CCCCWP’s) amended NPDES Permit (order no. R2-2003-0022; permit no. CAS002912). The overall goal of this measure is to ensure that new development covered under the HCP has no or minimal adverse effects on downstream fisheries to avoid take of fish listed under ESA or CESA. See HCP pp. 6-21 to 6-22.

APPLIES TO NEW DEVELOPMENT PROJECTS THAT INCLUDE OR ARE ADJACENT TO STREAMS, PONDS, OR WETLANDS Conservation Measure 1.7. Establish Stream Setbacks. A stream setback will be applied to all development projects covered by the HCP according to the stream types listed in Table 6-2 of the HCP. See HCP pp. 6-15 to 6-18 and Table 6-2.

APPLIES TO NEW DEVELOPMENT PROJECTS ADJACENT TO EXISTING PUBLIC OPEN SPACE, HCP PRESERVES, OR LIKELY HCP ACQUISITION SITES Conservation Measure 1.6. Minimize Development Footprint Adjacent to Open Space. Project applicants are encouraged to minimize their development footprint and set aside portions of their land to contribute to the HCP Preserve System. Land set aside that contributes to the HCP biological goals and objectives may be credited against development fees. See HCP pages 6-14 to 6-15.

Conservation Measure 1.8. Establish Fuel Management Buffer to Protect Preserves and Property. Buffer zones will provide a buffer between development and wildlands that allows adequate fuel management to minimize the risk of wildlife damage to property or to the preserve. The minimum buffer zone for new development is 100 feet. See HCP pages 6-18 to 6-19.

Conservation Measure 1.9. Incorporate Urban-Wildlife Interface Design Elements. These projects will incorporate design elements at the urban-wildlife interface to minimize the indirect impacts of development on the adjacent preserve. See HCP pp. 6-20 to 6-21.

APPLIES TO ROAD MAINTENANCE PROJECTS OUTSIDE THE UDA
Conservation Measure 1.12. Implement Best Management Practices for Rural Road Maintenance. Road maintenance activities have the potential to affect covered species by introducing sediment and other pollutants into downstream waterways, spreading invasive weeds, and disturbing breeding wildlife. In order to avoid and minimize these impacts, BMPs described in the HCP will be used where appropriate and feasible. See HCP pp. 6-25 to 6-26.

APPLIES TO NEW ROADS OR ROAD IMPROVEMENTS OUTSIDE THE UDA Conservation Measure 1.14. Design Requirements for Covered Roads Outside the Urban Development Area (UDA). New roads or road improvements outside the UDA have impacts on many covered species far beyond the direct impacts of their project footprints. To minimize the impacts of new, expanded, and improved roads in agricultural and natural areas of the inventory area, road and bridge construction projects will adopt siting, design, and construction requirements described in the HCP and listed in Table 6-6. See HCP pp. 6-27 to 6-33 and Table 6-6.

APPLIES TO FLOOD CONTROL MAINTENANCE ACTIVITIES
Conservation Measure 1.13. Implement Best Management Practices for Flood Control Facility Maintenance. Flood control maintenance activities have the potential to affect covered species by introducing sediment and other pollutants into downstream waterways and disturbing breeding wildlife. In order to avoid and minimize these impacts, BMPs described in the HCP will be used where appropriate and feasible. See HCP pp. 6-26 to 6-27.
277

Planning Survey Report Form, Revised July 2015
2) For all checked conservation measures, describe how the project will comply with each measure.

Attach as Attachment C: Project Compliance to HCP Conditions.

VI. MITIGATION MEASURES
1) Mitigation Fee Calculator(s)
Complete and attach the fee calculator (use permanent and/or temporary impact fee calculator as appropriate), and attach as Attachment D: Fee Calculator(s). 2) Briefly describe the amount of fees to be paid and when applicant plans to submit payment.

The entire 5.4-acre site contains cropland, and is within Fee Zone 1. Construction is expected to commence in early 2026.

Using the current fee schedule, fees would be paid on 5.4 acres of development in Fee Zone 1 at $21,090.90 per acre, for a total mitigation fee of $113,890.86. Fees will be paid pursuant to the fee schedule that is in place at the time construction commences.
278
ATTACHMENT A: PROJECT DESCRIPTION
279
Project Description
5321 Sellers Avenue Subdivision Project
The project will divide the existing 5.40-acre parcel located at 5321 Sellers Avenue in Oakley, California into three parcels. The three parcels will be constructed into five single-family homes, five Accessory Dwelling Units, and an associated access roadway. The project site currently consists of an existing vacant parcel that is approximately 5.40-acres in size and would construct approximately 44,000 gross square feet of new impervious area.

Reduction in impervious area will be accomplished by using existing roadway materials on the site (remnants of gravel roadway). Remaining undeveloped areas of the site will be used for landscaped plantings. Soil disturbance and vegetation removal will occur with a maximum depth of excavation of approximately 48 inches, depending on foundation and utility depth requirements.

The construction of this project is anticipated to start in March 2026 and finish in September 2027. It anticipated to be constructed in three phases starting with site preparation, which will include rough and fine grading, with trenching and utility infrastructure installations. Once site preparation is complete the access roadway and building structures will be constructed, with the final phase of construction completing the interior and exterior of the buildings. 280
ATTACHMENT B: FIGURES
281
Project Boundary
0 1,000 2,000
n Feet Date: 5/21/2025 User: nreid Path: Z:\Projects\j1606401\MAPDOC\NCCP Compliance Support Project\NCCP Compliance Support Project.aprx Map: Project Location Layout: Figure 1 Project Location Portrait Vallejo
Rio
Vista
Fairfield
Fremont
Pleasanton
Livermore
San
Leandro
Dublin
San
Ramon
Alameda
Danville
Moraga
Oakland
Albany
Berkeley
Orinda Walnut Creek
Oakley
Concord
Pinole
Martinez Pittsburg
Hercules
San
Rafael
Novato
Tracy
Tracy
Isleton
San Mateo
ÄÆ242
ÄÆ24
ÄÆ ÄÆ113 ÄÆ121 29 ÄÆ84
ÄÆ61
ÄÆ92
ÄÆ185
ÄÆ37
ÄÆ12 ÄÆ160
ÄÆ4
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C o n t r a
C o s t a C o u n t y
S o l a n o
C o u n t y
A l a m e d a
C o u n t y
Project Site
SOURCE: USGS National Map 2025
5321 Sellers Avenue Subdivision Project
Project Vicinity
FIGURE 1
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Date: 5/19/2025 User: nreid Path: Z:\Projects\j1606401\MAPDOC\NCCP Compliance Support Project\NCCP Compliance Support Project.aprx Map: [empty] Layout: Figure 2 Site Plan 5321 Sellers Avenue Subdivision Project
Site Plan
FIGURE 2
283
Sellers Ave
Project Boundary
Permanent Impacts
Land Cover Type
Cropland
0 50 100 n Feet Date: 5/21/2025 User: nreid Path: Z:\Projects\j1606401\MAPDOC\NCCP Compliance Support Project\NCCP Compliance Support Project.aprx Map: Vegetation Layout: Figure 3 Field-Verified Land Cover Map SOURCE: Bing Imagery 2024; OpenStreetMaps 2019; Contra Costa County 2006 5321 Sellers Avenue Subdivision Project
Field-Verified Land Cover Map
FIGURE 3
284
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Sellers Ave
3 6
8 1
2 4
5 7
9 10
11 12 13
14 15 16
17 Project Boundary
?! Photo Point Locations
0 50 100 n Feet
Date: 5/21/2025 User: nreid Path: Z:\Projects\j1606401\MAPDOC\NCCP Compliance Support Project\NCCP Compliance Support Project.aprx Map: Photo Point Map Layout: Figure 4a Photo Point Map SOURCE: Bing Imagery 2024; OpenStreetMaps 2019; Contra Costa County 2006 5321 Sellers Avenue Subdivision Project
Photo Point Location Map
FIGURE 4a
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FIGURE 4B PHOTOLOG
16064 1
MAY 2025
Photo 1. Overview of southeast edge of the project site facing north. Photo 2. Overview of southeast edge of the project site facing northwest. 286
FIGURE 4B PHOTOLOG
16064 2
MAY 2025
Photo 3. California ground squirrel burrow along southern boundary of the project site.

Photo 4. Overview of southern edge of project site facing southwest. 287
FIGURE 4B PHOTOLOG
16064 3
MAY 2025
Photo 5. Overview of the southern edge of the project site facing north. Photo 6. California ground squirrel burrow within the center of the project site. 288
FIGURE 4B PHOTOLOG
16064 4
MAY 2025
Photo 7. Overview of western edge of project site facing southwest. Photo 8. California ground squirrel burrow cluster within the southwestern section of the project site.
289
FIGURE 4B PHOTOLOG
16064 5
MAY 2025
Photo 9. Overview of the northwestern edge of the project site facing northwest.

Photo 10. Livestock area in the northeastern corner of the project site facing northwest.
290
FIGURE 4B PHOTOLOG
16064 6
MAY 2025
Photo 11. Overview of the main project site from the western edge facing east. Photo 12. Potential Swainson’s hawk and golden eagle nesting habitat to the north of the site.
291
FIGURE 4B PHOTOLOG
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Photo 13. Overview of the northern boundary of the project site facing east. Photo 14. Overview of the project site from the northern boundary facing southeast.
292
FIGURE 4B PHOTOLOG
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Photo 15. Overview of the northern boundary of the project site facing east. Photo 16. Overview of the project site from the northern boundary facing southeast.
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FIGURE 4B PHOTOLOG
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MAY 2025
Photo 17. Overview of the project site from the eastern boundary facing west. 294
Sellers Ave
Crismore Dr
Project Boundary
500-foot Burrowing Owl Habitat
Assessment Buffer
Potential Burrowing Owl Habitat
0 115 230 n Feet Date: 5/19/2025 User: nreid Path: Z:\Projects\j1606401\MAPDOC\NCCP Compliance Support Project\NCCP Compliance Support Project.aprx Map: Burrowing Owl Habitat Layout: Figure 5A - Planning Survey Burrowing Owl Habitat Map SOURCE: Bing Aerial Imagery 2024; OpenStreetMaps 2019
5321 Sellers Avenue Subdivision Project
Planning Survey Burrowing Owl Habitat Map
FIGURE 5A
295
Sellers Ave
Macy Ln
Lozoya Way
Crismore Dr
Project Boundary
1,000-foot Swainson's
Hawk Habitat
Assessment Buffer
Potential Swainson's
Hawk Nesting Habitat
0 180 360 n Feet Date: 5/19/2025 User: nreid Path: Z:\Projects\j1606401\MAPDOC\NCCP Compliance Support Project\NCCP Compliance Support Project.aprx Map: Swainson's Hawk Habitat Layout: Figure 5B - Planning Survey Swainson's Hawk Habitat Map SOURCE: Bing Aerial Imagery 2024; OpenStreetMaps 2019
5321 Sellers Avenue Subdivision Project
Planning Survey Swainson's Hawk Nesting Habitat Map
FIGURE 5B
296
Sellers Ave
C
r
e
e
k
sid
e
Way
Teton Rd
Sie
rra
Trail
Rd
Keith Ct
King Canyon Way
1st St
B
u
tler
Ln
Cooks Ct
A St
Yula Way
P
i
n
e
cone
Ln
Lola St
Roger
Ln
Carol
L
e
e
L
n
Diane
Ct
Fuller Ct
Macy Ln
2nd St
Peach Ln
Honey Ln Delta
Raye Ave
Century Way
Olive Ln
Grant Rd
Curlew Connex
Arminio Ln
Easy St
Lozoya Way
Tule Ln
Bartels Dr
Cri
s
m
o
r
e
D
r
Doyle Rd
Douglas Rd
Salvador Ln
Hill Ave
Malicoat Ave
Knightsen Ave
Delta Rd
Project Boundary
1/2-mile Golden Eagle Habitat Assessment Buffer
Potential Golden Eagle Nesting Habitat
0 460 920 n Feet Date: 5/20/2025 User: nreid Path: Z:\Projects\j1606401\MAPDOC\NCCP Compliance Support Project\NCCP Compliance Support Project.aprx Map: Golden Eagle Habitat Layout: Figure 5C - Planning Survey Golden Eagle Habitat Map SOURCE: Bing Aerial Imagery 2024; OpenStreetMaps 2019
5321 Sellers Avenue Subdivision Project
Planning Survey Golden Eagle Nesting Habitat Map
FIGURE 5C
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ATTACHMENT C: PROJECT COMPLIANCE TO HCP CONDITIONS
298
Project Compliance to HCP Conditions
5321 Sellers Avenue Subdivision Project
Conservation Measure 1.11. Avoid Direct Impacts on Extremely Rare Plants, Fully Protected Wildlife Species, or Covered Migratory Birds
The project will avoid direct impacts on extremely rare plants, fully protected wildlife species and covered migratory birds.

Extremely Rare Plants
Results of the planning survey have identified no extremely rare plant species that would be expected to occur on the project site.

Fully Protected Wildlife
The HCP/NCCP lists four no-take, fully protected wildlife species in Table 6-5: white-tailed kite (Elanus leucurus), peregrine falcon (Falco peregrinus), golden eagle (Aquila chrysaetos), and ringtail (Bassariscus astutus). Planning surveys have determined that two of these species are not expected to occur on the project site: peregrine falcon and ringtail. Peregrine falcons nesting habitat includes cliffs and human-made structures such as bridges and tall buildings. No suitable peregrine falcon nesting habitat was documented within or in the vicinity of the project site during the planning survey. Ringtails are not expected to occur within the project site due to lack of continuous woodland, forest or riparian areas. This planning survey report includes the results of the habitat assessment for golden eagle and associated avoidance measures.

White-Tailed Kite
White-tailed kites forage over open habitats. Potential foraging habitat for white-tailed kite occurs throughout the project site where the cropland land cover type occurs and where rodent prey species are abundant. This species typically nests in riparian areas adjacent to open spaces, often in dense deciduous trees or in isolated trees. Trees adjacent to the project site are suitable for nesting by this species. Avoidance of direct impacts on this species can be achieved through preconstruction surveys. Preconstruction surveys for Swainson’s hawk and golden eagle will simultaneously determine if white-tailed kite are nesting in the project vicinity. Avoidance measures for any active nests will follow the avoidance measures detailed in the below section “Nesting Birds”.

Nesting Birds
Nesting bird activity typically occurs from February through August. Disturbing or destroying active nests is a violation of the federal Migratory Bird Treaty Act. In addition, nests and eggs are protected under California Fish and Game Code Section 3503. To avoid direct impacts to nesting birds, the following measures shall be implemented:
• Tree and vegetation removal and initial ground disturbance at the project site will be conducted outside of the nesting season (February through September) as feasible. If not feasible, the following measures will be implemented to avoid or minimize impacts to nesting birds:
299
o A qualified biologist shall conduct a preconstruction survey for nesting birds no more than 7 days prior to vegetation or structure removal or ground-disturbing activities conducted during the nesting season (February through September). The survey shall cover the limits of construction and suitable nesting habitat within 1,000 feet for raptors and 100 feet for other nesting birds, as feasible and accessible. o If any active nests are observed during surveys, a qualified biologist shall establish a suitable avoidance buffer from the active nest. The buffer distance shall typically range from 50 to 500 feet and shall be determined based on factors such as the species of bird, topographic features, intensity and extent of the disturbance, timing relative to the nesting cycle, and anticipated ground-disturbance schedule. Limits of construction to avoid active nests shall be established in the field with flagging, fencing, or other appropriate barriers, and shall be maintained until the chicks have fledged and the nests are no longer active, as determined by the qualified biologist. o If vegetation removal activities are delayed, additional nest surveys shall be conducted such that no more than 7 days elapse between the survey and vegetation removal activities.
o If an active nest is identified in or adjacent to the construction zone after construction has started, work in the vicinity of the nest shall be halted until the qualified biologist can provide appropriate avoidance and minimization measures to ensure that the nest is not disturbed by construction. Appropriate measures may include a nodisturbance buffer until the birds have fledged and/or full-time monitoring by a qualified biologist during construction activities conducted near the nest.

Conservation Measure 1.10. Maintain Hydrologic Conditions and Minimize Erosion The project will maintain hydrologic conditions and minimize erosion to achieve the HCP/NCCP goal of limiting project impacts on downstream fisheries and avoid take of threatened and/or endangered fish species.

The following provisions from the C.3 Amendments of the Contra Costa County Clean Water Program’s (CCCCWP’s) were highlighted in the HCP/NCCP as applicable and relevant to projects covered under the HCP/NCCP. The project shall implement all relevant and feasible measures to ensure compliance with the HCP.
• Develop stormwater treatment controls such as detention basins sized, at a minimum, to treat runoff in accordance with the criteria provided in the Provisions. • Implement a verification program for treatment controls to ensure that all installed controls are being appropriately operated and maintained.

Control peak runoff flows and volumes by means of creation and implementation of a Hydrograph Modification Management Plan subject to Provision requirements. • Provide compensatory mitigation to the appropriate jurisdiction (i.e., city or County) for projects where meeting Provision requirements are physically impractical. • Limit the use of stormwater controls that function primarily as infiltration devices in order to protect groundwater quality and local stream hydrograph. 300
ATTACHMENT D: FEE CALCULATOR(S)
301
ECCC HCP/NCCP 2025 Fee Calculator Worksheet
Permanent Impacts
PROJECT APPLICANT:

PROJECT NAME:

APN(s):

JURISDICTION:

DATE PREPARED:
2025 FEE /
ACRE 1 TOTAL
DEVELOPMENT FEE Fee Zone 1 5.40 x $21,090.90 = $113,890.86 Fee Zone 2 0.00 x $42,181.80 = $0.00
Fee Zone 3 0.00 x $10,545.45 = $0.00
Fee Zone 42 0.00 x $31,636.35 = $0.00
Development Fee Total = $113,890.86
WETLAND MITIGATION FEE 0.000 x $116,686.48 = $0.00
Perennial Wetland 0.000 x $179,565.89 = $0.00
Seasonal Wetland 0.000 x $421,817.26 = $0.00
Alkali Wetland 0.000 x $426,432.22 = $0.00
Ponds 0.000 x $232,637.96 = $0.00
Aquatic/Open Water 0.000 x $116,319.53 = $0.00
Slough/Channel 0.000 x $164,759.00 = $0.00
Streams ≤ 25 ft (in linear ft) 0 x $609.38 = $0.00
Streams > 25 ft (in linear ft) 0 x $913.52 = $0.00
Wetland Mitigation Fee Total = $0.00
STREAM SETBACK ENCROACHMENT Encroachment 0.000 x $58,343.24 = $0.00 Stream Setback Encroachment Fee Total = $0.00
FEE REDUCTION Development Fee reduction for land in lieu of fee = Development Fee reduction for permanent assessments =
Wetland Mitigation Fee reduction for restoration/creation = Reduction Total = $0.00
FINAL FEE CALCULATION Development Fee Total $113,890.86 Wetland Mitigation Fee Total + $0.00
Encroachment in Stream Setback Fee Total + $0.00
Mitigation Fee Total = $113,890.86
+
= $113,890.86
____
Mark A. de la O
5321 Sellers Avenue Subdivision Project
033-130-055
May 29, 2025
Contra Costa County
4 Participating Special Entities (PSEs) are required to pay fees over and above permanent and temporary impact mitigation fees to cover indirect costs of extending permit coverage, including a portion of the costs of the initial preparation of the Plan, and a portion of the costs of conservation actions designed to contribute to species recovery. This amount will be determined by the Conservancy in accordance with the Contribution to Recovery Implementation Policy adopted by the Conservancy Governing Board on December 8, 2014.

Riparian woodland/scrub

PERMANENT

IMPACTS (AC)
3 For every acre of impact on wetlands, streams, ponds, and riparian woodland/scrub, applicants will pay the appropriate development fee (according to fee zone) towards land acquisition and the conservation program as a whole, as well as a wetland mitigation fee to cover the costs of successful restoration or creation (ECCC HCP/NCCP Chapter 9.3.1).

Contribution to Recovery4

TOTAL AMOUNT DUE
2 Fee Zone 4 is not shown on Figure 9-1 of the HCP/NCCP but refers to the fee applicable to those few covered acitivities located in northeastern Antioch (p. 9-21). 1 The Fee Schedule is adjusted annually (no later than March 15 of each year). Development Fees are adjusted according to a formula that includes both a Home Price Index (HPI) and a Consumer Price Index (CPI). The Wetland Mitigation Fees are adjusted according to a CPI. Every five years, a fee audit is conducted which also adjusts the fees.

These impacts are charged both a wetland
mitigation fee and a development fee.3
See appropriate city/county ordinance or HCP/NCCP
Figure 9-1 to determine Fee Zone.

See HCP/NCCP Chapter 6 (p. 6-15 to 6-18) for more info.

Fee reductions must be approved by the Habitat Conservancy.

See HCP/NCCP Chapter 9 for more info.

Updated March 5, 2024
302
ATTACHMENT E: WETLAND DELINEATION (if applicable)
(Not Applicable)
303

APPENDIX C

PHASE I ENVIRONMENTAL SITE ASSESSMENT
304
Phase I Environmental Site Assessment
5321 Sellers Avenue
Oakley, California 94561
MAY 2026
Prepared for:

MARK A. DE LA O
296 Heron Drive
Pittsburg, California 94565
Prepared by:

Corporate Office:
687 S Coast Highway 101, Suite 110
Encinitas, California 92024
__________________________
Glenna McMahon, PE
Principal Engineer
__________________________
Stephanie Chao
Environmental Engineer
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Table of Contents
SECTION PAGE NO.

Acronyms and Abbreviations............................................................................................................................................ iii 1 Executive Summary..............................................................................................................................................1 2 Introduction ..........................................................................................................................................................3

2.1 Assessment Procedure and Scope of Investigation.............................................................................3

2.2 Qualifications of Environmental Professionals.....................................................................................3 3 Site Location.........................................................................................................................................................5 4 Environmental Setting .........................................................................................................................................6

4.1 Topography and Geology........................................................................................................................6

4.2 Groundwater...........................................................................................................................................6

4.3 Agricultural Use.......................................................................................................................................6 5 Public Agency Records Search............................................................................................................................8

5.1 Subject Property .....................................................................................................................................9

5.2 Adjoining Properties ...............................................................................................................................9

5.3 Nearby Properties................................................................................................................................ 10

5.4 Unmapped Sites .................................................................................................................................. 11 6 Interviews .......................................................................................................................................................... 12

6.1 Site Representative Interview............................................................................................................. 12

6.2 User-Provided Information .................................................................................................................. 12

6.3 Local Agency Records ......................................................................................................................... 12

6.3.1 City of Oakley.......................................................................................................................... 12

6.3.2 Contra Costa County .............................................................................................................. 13

6.3.3 Ironhouse Sanitary District.................................................................................................... 14

6.3.4 CalRecycle Solid Waste Information System ....................................................................... 14

6.3.5 State Water Resources Control Board.................................................................................. 14

6.3.6 Department of Toxic Substances Control............................................................................. 16

6.3.7 California Environmental Protection Agency Regulated Site Portal..................................................... 16

6.3.8 California Geologic Energy Management Division............................................................... 17

6.3.9 National Pipeline Mapping System....................................................................................... 17 7 Site Reconnaissance ........................................................................................................................................ 18

7.1 Description of Subject Property and Surroundings ........................................................................... 18

7.2 Summary of Observations................................................................................................................... 18 8 Site History ........................................................................................................................................................ 21

8.1 Historical Aerial Photographs ............................................................................................................. 21 306
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8.2 Historical Topographic Maps .............................................................................................................. 24

8.3 Fire Insurance Maps............................................................................................................................ 25

8.4 City Directory........................................................................................................................................ 26 9 Previous Environmental Site Assessments............................................................................................................. 27 10 Vapor Encroachment ........................................................................................................................................ 28 11 Other Considerations ........................................................................................................................................ 29 12 Findings and Conclusions................................................................................................................................. 30 13 Limitations......................................................................................................................................................... 31

13.1 Data Gaps and Data Failures ............................................................................................................. 31

13.2 Report Limitations ............................................................................................................................... 31 14 References ........................................................................................................................................................ 33

APPENDICES
A Qualifications of Environmental Professionals
B Historical Topographic Maps
C EDR Radius Map Report
D Owner- and User-Provided Information
E Local Agency Records
F Site Reconnaissance Photographs
G Historical Aerial Photographs
H Certified Sanborn Map Report
I City Directory Report
FIGURE
1 Subject Property Location....................................................................................................................................2 TABLES
1 Regulatory Database Search Summary..............................................................................................................8 2 Summary of Aerial Photographs....................................................................................................................... 21 3 Summary of Topographic Maps ....................................................................................................................... 24 4 Summary of City Directory Listings .................................................................................................................. 26 307
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Acronyms and Abbreviations
Acronym/Abbreviation Definition
AST aboveground storage tank
CalEPA California Environmental Protection Agency
CalRecycle California Department of Resources Recycling and Recovery CERCLA Comprehensive Environmental Response, Compensation, and Liability Act City City of Oakley
CREC controlled recognized environmental condition
EDR Environmental Data Resources
EPA U.S. Environmental Protection Agency
ESA Environmental Site Assessment
HFPO-DA hexafluoropropylene oxide dimer acid
HREC historical recognized environmental condition
MCL maximum contaminant level
PCB polychlorinated biphenyl
pCi/L picocuries per liter
PFAS per- and polyfluoroalkyl substances
PFBS perfluorobutanesulfonic acid
PFHxS perfluorohexanesulfonic acid
PFNA perfluorononanoic acid
PFOA perfluorooctanoic acid
PFOS perfluorooctanesulfonic acid
REC recognized environmental condition
SWRCB State Water Resources Control Board
TPH total petroleum hydrocarbons
UST underground storage tank
VEC vapor encroachment condition
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1 Executive Summary
Dudek conducted a Phase I Environmental Site Assessment (ESA) for 5321 Sellers Avenue, Oakley, California (subject property) on behalf of the property owner, Mark A. de la O; see Figure 1, Subject Property Location. The subject property consists of 5.39 acres of land on a single parcel (Assessor’s Parcel Number 033-130-055).

The findings of this investigation are based on historical sources, information contained in regulatory agency databases, interviews, and a site reconnaissance.

Information gathered for this report indicated the following:
▪ Row crops and orchards were observed on the subject property from the 1930s to the 1980s. ▪ The subject property is currently used for livestock grazing and consists of tilled land and uncultivated grasses with multiple vehicles parked throughout.
▪ Structures observed on the subject property include a well and well pump housing located in the southeastern region and an animal shed located in the northwestern corner. ▪ Adjoining properties to the subject property include a plowed field and a stand of trees to the north, plowed fields and residential properties to the west, Sellers Avenue followed by uncultivated agricultural fields to the east, and a sheep pasture to the south.
▪ Solid debris storage, multiple drums, an empty water tote, and chemical containers of contents such as motor oil were observed throughout the subject property during the site reconnaissance. An aboveground storage tank (AST) of unidentified contents, a car battery, and a portable generator affixed to a parked trailer were also observed on the subject property. No spills, leaks, or stained surface soils were observed on the subject property at the time of the site reconnaissance. ▪ ASTs were also observed on the eastern- and western-adjoining properties and multiple drums were observed on the southern-adjoining property. No evidence of a spill or leak of hazardous substances was observed at the time of the site reconnaissance.

Dudek performed this Phase I ESA of the subject property in conformance with the scope and limitations of ASTM E1527-21 Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process (ASTM 2021). This report summarizes the research and findings of the Phase I ESA. This assessment did not reveal evidence of historical recognized environmental conditions (HRECs), controlled recognized environmental conditions (CRECs), or vapor encroachment conditions (VECs) in connection with the subject property. The recognized environmental condition (REC) identified for the subject property is as follows:
▪ As with all agricultural properties, pesticides and herbicides are likely used. The chemicals of concern associated with these compounds, such as organochlorinated compounds and metals, accumulate and persist in shallow soils. Considering the length of time the subject property was used for agricultural purposes (between the 1930s and 1980s), concentrations of chemicals of concern may be above regulatory screening levels. Therefore, the historical agricultural use is considered a REC.

Additional data gaps, which were determined not to be significant, are discussed in Section 13, Limitations. 309
Date: 5/14/2026 - Last saved by: schao - Path: Z:\Hydro\Projects\16064_5321SellersAve_PhaseIESA\MXD\WORKING\Fig1_SubjectPropertyLocation.mxd Sellers Avenue
Whistle Stop Lane
Subject Property Location
5321 Sellers Avenue, Oakley, California - Phase I Environmental Site Assessment SOURCE: ESRI Imagery
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Subject Property Boundary
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2 Introduction
This Phase I ESA was performed according to the guidelines stipulated in ASTM E1527-21 (ASTM 2021). This Phase I ESA was conducted on behalf of Mark A. de la O (user) as part of environmental due diligence for development of the subject property. As defined in Section 3.2.94 of ASTM E1527-21, the “user” is defined as the party seeking to complete the Phase I ESA on the subject property. User obligations, as defined in ASTM E1527-21, are discussed further in Section 6.2, User-Provided Information.

2.1 Assessment Procedure and Scope of Investigation
Phase I ESAs assist in identifying past and present land use, including identification of possible releases or disposal of manufacturing or other wastes if such information is contained within regulatory reports or files and/or is currently visible on site. The assessment reviews federal (U.S. Environmental Protection Agency [EPA]), state, county, and local lists of known or potentially hazardous waste sites, landfills, and sites currently under investigation for environmental violations that may be of concern to a site.

The scope of this environmental investigation consisted of (1) a reconnaissance of the subject property; (2) a search of regulatory agency records; (3) a review of available historical aerial photographs, topographic maps, Sanborn fire insurance maps, city directory listings, and building department records; (4) interviews with the owner of the subject property and user of this report; (5) an evaluation of the potential for vapor intrusion risk; and (6) preparation of this Phase I ESA report detailing the findings of the investigation.

These activities were conducted to identify RECs. The term recognized environmental condition (REC) means the presence or likely presence of any hazardous substances or petroleum products in, on, or at the subject property due to a release, likely release, past release, or material threat of a future release to the environment.

The term controlled recognized environmental condition (CREC) is an environmental condition that would have been considered a REC in the past but that has been remediated and received risk-based closure by a regulatory agency (i.e., received a “No Further Action” letter) where residual contamination remains in place. Furthermore, the term CREC is used if the property is subject to a control or use restriction (i.e., property use restrictions, activity and use limitations, institutional controls, or engineering controls) due to residual on-site contamination.

The term historical recognized environmental condition (HREC) is an environmental condition that would have been considered a REC in the past but that has been remediated and received unrestricted residential use closure by the regulatory agency. Therefore, no controls or use restrictions have been applied to the property.

The term REC is not intended to include de minimis conditions. De minimis conditions are conditions that generally do not present a material risk of harm to public health or the environment and thus would not be subject to an enforcement action if brought to the attention of governmental agencies.

2.2 Qualifications of Environmental Professionals
This Phase I ESA was prepared by Glenna McMahon, principal engineer; Stephanie Chao, environmental engineer; Talulah Patch, engineer; and Olivia Cowley, environmental compliance specialist. Qualifications for Glenna McMahon, Stephanie Chao, Talulah Patch, and Olivia Cowley are included in Appendix A. The following statement is made by the environmental professional, Glenna McMahon:
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I declare that, to the best of my professional knowledge and belief, I meet the definition of environmental professional as defined in Section 312.10 of Title 40 of the Code of Federal Regulations, Part 312. I have the specific qualifications based on education, training, and experience to assess a property of the nature, history, and setting of the subject property. I have developed and performed all appropriate inquiries in conformance with the standards and practices set forth in Title 40 of the Code of Federal Regulations, Part 312. 312
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3 Site Location
The subject property consists of a single parcel of land comprising 5.39 acres located in the City of Oakley, Contra Costa County, California. The subject property is located at 5321 Sellers Avenue, approximately 3.25 miles east of California State Route 4 and approximately 1.63 miles south of the Contra Costa Canal. The subject property is currently utilized for livestock grazing. The subject property consists of tilled land and uncultivated grasses with multiple vehicles parked throughout.

The subject property is adjoined by rural residences to the west and north, mostly vacant land with a small rural residence to the south, and Sellers Avenue followed by a mix of vacant and agricultural land to the east. The surrounding properties consist of a mix of residential properties, agricultural land, and vacant land. 313
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4 Environmental Setting

4.1 Topography and Geology
The subject property is located near the eastern border of the City of Oakley (City), on the east side of Main Street and north of Delta Road.

General topographic information for the subject property and the surrounding area was obtained from a review of topographic maps (Appendix B), the Environmental Data Resources (EDR) Radius Map Report (Appendix C), and a site visit. The natural topography of the subject property is flat with a slight downward gradient to the east-northeast.

The subject property sits at an elevation of approximately 32 feet above mean sea level.

No subsurface geologic investigations were performed as part of this Phase I ESA. According to the EDR Radius Map Report (Appendix C), the subject property is almost entirely underlain by the Brentwood clay loam soil components. These soils are characterized as being well drained with moderately high runoff potential when thoroughly wet and have somewhat restricted water transmission through soil. A very small portion of the northern subject property is underlain by the Delhi sand soil components. These soils are characterized as being somewhat excessively drained with low runoff potential when thoroughly wet and free water transmission through soil.

4.2 Groundwater
According to the EDR Radius Map Report, there are 26 water wells located within 1 mile of the subject property.

According to the EDR report, the nearest groundwater monitoring well is located approximately 0.14 miles west of subject property; depth to water as reported in January 1976 was 30.00 feet below ground surface. Dudek reviewed the State Water Resources Control Board (SWRCB) Groundwater Ambient Monitoring and Assessment Program Groundwater Information System (SWRCB 2026a) and did not identify any wells on the subject property. According to data from the California Department of Water Resources Water Data Library Station Map, groundwater was identified in 2014 at a depth of 8.05 feet below ground surface at a well located approximately 0.12 miles east of the subject property (DWR 2026). No groundwater gradient information was obtained during this Phase I ESA.

4.3 Agricultural Use
The subject property is currently used for agricultural purposes and livestock grazing. Historical resources (see Section 8, Site History) indicate the subject property was used for agricultural purposes from the 1930s to the 1980s, as observed by apparent row crops and orchards. No evidence was identified indicating pesticide storage or mixing, cattle operations or dairies, or other potential sources of elevated concentrations of contaminants of concern typically associated with farming operations. The property owner did not identify pesticide use on the property as part of current operations (see Section 6, Interviews).

As with all agricultural properties, pesticides and herbicides were likely used. The chemicals of concern associated with these compounds, such as organochlorinated compounds and metals, accumulate and persist in shallow soils.

Therefore, the longer a property is used for agricultural purposes, the more likely there is an accumulation of these chemicals of concern. Considering the ongoing long-term agricultural use and lack of redevelopment of the property, there is a potential for elevated concentrations of pesticide- and herbicide-related compounds in surface soils. 314
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There are no soil sampling data for the subject property; therefore, it is unknown if concentrations of potential contaminants of concern are above or below risk-based concentrations. As the site has never been redeveloped, potentially impacted soils may remain on the subject property. Therefore, this historical agricultural use is considered a REC.
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5 Public Agency Records Search
Table 1 summarizes the environmental databases that were searched as required by ASTM E1527-21, as well as additional environmental databases providing information on hazardous materials and petroleum products on the subject property that were searched (“target property” is the term used by EDR). The comprehensive list of databases is included in the EDR Radius Map Report, which was prepared on April 22, 2026 (Appendix C).

Table 1 lists the databases that were searched, search distances from the subject property, whether the subject property was listed, and the number of sites identified.

Table 1. Regulatory Database Search Summary
Acronym Database
Search
Distance
Subject
Property
Listed?
Number of
Surrounding
Listings
NPL National Priorities List (including
proposed NPL sites and NPL Liens
[target property only])
1 mile No 0
Proposed NPL Sites proposed for NPL 1 mile No 0
Delisted NPL NPL Deletions 1 mile No 0
NPL Liens Federal Superfund Liens 1 mile No 0
CERCLIS –
Federal Facility
Comprehensive Environmental
Response, Compensation, and Liability
Information System for the
Comprehensive Environmental
Response, Compensation, and Liability
Act (CERCLA) with U.S. Environmental
Protection Agency Federal Restoration
and Reuse Office involvement

0.5 miles No 0
CERCLIS –
SEMS
CERCLA Superfund Enterprise
Management System

0.5 miles No 0

CERCLIS NFRAP
(SEMS ARCHIVE)
No Further Remedial Action Planned –
CERCLA SEMS Archive

0.5 miles No 0
CORRACTS Resource Conservation and Recovery
Act (RCRA) Corrective Action
1 mile No 0
RCRA TSDF RCRA – Transportation, Storage, and
Disposal Facilities

0.5 miles No 0
RCRA-LQG RCRA Large Quantity Generators 0.25 miles No 0 RCRA-SQG RCRA Small Quantity Generators 0.25 miles No 0 RCRA-VSQG RCRA Very Small Quantity Generators 0.25 miles No 0 ERNS Emergency Response Notification
System
Target
property
No 0
LUCIS Land Use Control Information System –
Institutional Control/Engineering
Control

0.5 miles No 0
US ENG

CONTROLS
Federal sites with Engineering Controls 0.5 miles No 0
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Table 1. Regulatory Database Search Summary
Acronym Database
Search
Distance
Subject
Property
Listed?
Number of
Surrounding
Listings

US INST

CONTROLS
Federal sites with Institutional Controls 0.5 miles No 0 RESPONSE State- and Tribal-Equivalent CERCLIS –
Confirmed Release List
1 mile No 1
ENVIROSTOR EnviroStor Databases 1 mile No 3
SWF/LF State and Tribal Landfill and/or Solid
Waste Disposal Site

0.5 miles No 0
LUST State Leaking Underground Storage
Tank

0.5 miles No 0
Indian LUST Tribal LUST 0.5 miles No 0
CPS-SLIC State Cleanup Program Sites 0.5 miles No 0
AST State and Tribal Registered
Aboveground Storage Tank

0.25 miles No 0
UST State and Tribal Registered
Underground Storage Tank

0.25 miles No 0
Indian UST Registered Underground Storage Tank
on Tribal Land

0.25 miles No 0
FEMA UST Federal Emergency Management
Agency (FEMA) owned Registered UST

0.25 miles No 0
Indian VCP Voluntary Cleanup on Tribal Land 0.5 miles No 0 VCP State and Tribal Voluntary Cleanup 0.5 miles No 0
Brownfields State and Tribal Brownfields 0.5 miles No 0 Additional environmental records, including local lists Varies No 12 Note: The search distances in the EDR report and listed in this table are equal to or greater than the search distances required by ASTM E1527-21.

5.1 Subject Property
The subject property was not identified in any of the databases searched by EDR.

5.2 Adjoining Properties
One site was identified adjoining to the east of the subject property: “Sandy Carasis.” The Sandy Carasis site is located on the eastern side of Sellers Avenue and was identified in the RCRA NonGen/NLR and E MANIFEST databases. The site’s E MANIFEST identified a total of 12.6 tons of asbestos waste, in addition to burlap, cloth, paper, or plastic bags that were transported from the site to a landfill. These database listings are administrative in nature and are not indicative of a spill or release of hazardous materials to the environment; therefore, it is unlikely that this site has impacted the environmental conditions of the subject property. 317
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5.3 Nearby Properties
A total of nine listings were identified at six unique addresses within the applicable search radii surrounding the subject property.

Four of the nine listings were release cases that were identified at three sites with unique addresses. 76-Acre Fourth High School. This site was identified as being located at the intersection of Sellers Avenue and Delta Road. A more precise location identified by longitude and latitude coordinates located the site approximately

0.36 miles south of the subject property. The site was identified in the EnviroStor and SCH databases for potential soil and soil vapor contamination of dioxin, metals, organochlorine pesticides, total petroleum hydrocarbons – gas (TPH-g), volatile organic compounds, and others as a result of the site’s past agricultural uses as an orchard with row crops, as part of an oil field, and as being in a residential area. The site received a No Further Action determination in December 2009. Based on the regulatory status of the site, the distance from the subject property, and that the impacts were limited to soil and soil vapor, it is unlikely that this site has impacted the environmental conditions of the subject property.

Cooks Battery (Oakley Battery)/Cooks Battery Reclamation (Oakley Battery). This site was identified at 129 Hill Avenue, located approximately 0.68 miles west of the subject property. The site was identified in the RESPONSE, EnviroStor, CPS-SLIC, HIST Cal-Sites, LIENS, Cortese, HIST CORTESE, CERS, and CA BOND EXP. PLAN databases for lead contamination in soil as a result of the site’s past use as a battery reclamation site. A lien was placed on the site in April 2006 as a result of the lead impacts. Remedial actions at the site and on adjoining and nearby properties included sampling, removal of impacted soil, and installation of an asphalt cap at the site.

According to the GeoTracker database, the site has been considered a closed Cleanup Program Site as of June 2006 (SWRCB 2026b). According to the EnviroStor database, the site has been considered Certified/ Operation and Maintenance as of June 2006 (DTSC 2026). According to an Operation and Maintenance Report from May 2002 (ERRG 2002), lead was not detected in groundwater above the laboratory detection limit of 0.005 milligrams per liter in any of the six groundwater samples that were collected during a February 2002 sampling event. Based on the regulatory status of the site, the distance from the subject property, and the affected media limited to soil, it is unlikely that this site has impacted the environmental conditions of the subject property.

Thompson Property. This site was identified at 1499/1621 Delta Road. A more precise location identified by longitude and latitude coordinates located the site approximately 0.72 miles southeast of the subject property. The site was identified in the EnviroStor and SCH databases for potential contamination from the site’s past agricultural use for row crops. The site has been considered Inactive – Withdrawn as of October 2024, with no noted documentation of a spill or release of hazardous materials to the environment and no requests from the NorCal Schools since 2003. Given that there is no information indicating a spill or release of hazardous materials to the environment, the distance from the subject property, and the regulatory status of the site, it is unlikely that this site has impacted the environmental conditions of the subject property.

Multiple sites are also listed as hazardous waste generators (RCRA NonGen/NLR, E MANIFEST, HWTS, HAZNET), sites with toxics and criteria pollutant emissions data (EMI), have an enforcement and compliance history (ECHO), are on the California Environmental Protection Agency (CalEPA) Regulated Site Portal (CERS), and/or listed by the Contra Costa County as being a part of the Underground Tank Program, Hazardous Waste Generator Program & Business Plan Program (CONTRA COSTA SITES). These listings are administrative in nature and do not necessarily indicate a release of hazardous materials to the environment; therefore, it is unlikely that any of these sites have impacted the environmental conditions of the subject property. 318
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5.4 Unmapped Sites
Unmapped sites are flagged by EDR but not mapped due to insufficient address information. They may be included in the database search report because they are in the same zip code as the subject property. The EDR report listed one unmapped site; the site was listed in a database that documents a release (CPS-SLIC) and was identified as a spill site with TPH contamination of gasoline, diesel, and motor oil (TPH-g, TPH-d, and TPH-o), as well as ethyl benzene and xylene. A preliminary assessment was ordered for the site in 2003. Dudek conducted additional research and determined that the unmapped site was located more than 5 miles southwest of the subject property.

Based on the distance from the subject property (more than 5 miles), it is unlikely this unmapped site has impacted the environmental conditions of the subject property.
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6 Interviews

6.1 Site Representative Interview
Dudek sent a site background questionnaire to the user of this report on March 20, 2026. A response was received from the property owner, Mark A. de la O, on March 20, 2026. A copy of the questionnaire is presented in Appendix D. Below is the summary of responses to the questionnaire. ▪ Mark A. de la O and his partners have owned the subject property for 5.5 years. They have used the subject property for livestock grazing for the entire time.
▪ A temporary livestock shelter located in the northwest corner of the subject property was erected approximately one year ago and a pump house shelter located in the southeast region of the subject property was erected approximately six months ago.
▪ The subject property was purchased from Nunn Family #2, and the previous owner contact was identified as Laura Houd.
▪ The subject property and adjoining properties have not been used for industrial uses. It is unknown whether the subject property has ever been used for agricultural purposes. ▪ A well is located on the southern end of the subject property; there is no known contamination associated with the well.
▪ Mark A. de la O was unaware of any previous hazardous materials use, storage, or other activities on the subject property that could indicate a release of hazardous materials or petroleum products.

6.2 User-Provided Information
In accordance with ASTM E1527-21, to qualify for one of the Landowner Liability Protections offered by the Small Business Liability Relief and Brownfields Revitalization Act of 2001, the tasks outlined in Section 6.2 through 6.8 of ASTM E1527-21 must be completed, including a search for environmental liens and activity and use limitations.

To facilitate this requirement, Dudek sent the User Questionnaire (Appendix X3 of the ASTM Standard) to the user of this report. Answers to these questions fulfill the requirement of Sections 6.2 through 6.8 of the ASTM Standard.

Mark A. de la O, owner, responded on April 20, 2026; responses are included in Appendix D. The user did not request that Dudek complete a search for environmental liens and activity and use limitations as part of this Phase I ESA. This represents a data gap and is further discussed in Section 13.1, Data Gaps and Data Failures.

6.3 Local Agency Records

6.3.1 City of Oakley
Dudek contacted the City of Oakley’s Public Information/Press Inquiries on April 22, 2026, to obtain records pertaining to building permits, septic systems, on-site wastewater treatment systems, individual sewage systems, agricultural use (pesticide/herbicide/insecticide usage and/or storage), hazardous materials storage/usage, aboveground and underground storage tanks (ASTs/USTs), and releases or investigations associated with the subject property. A response was received on May 4, 2026, that recommended water and sewage–related records be requested from the Diablo Water District and/or the Ironhouse Sanitary District. Dudek contacted the Diablo Water District on May 8, 2026, and received a response on May 11, 2026, recommending a records search through Ironhouse Sanitary District as they handle all wastewater for the City of Oakley (Appendix E). 320
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Additionally, the City’s response returned a Building Permit that was issued in June 2007 for the installation of a power pole (Appendix E). This permit does not indicate hazardous materials usage, storage, or a spill, or release of hazardous materials to the environment; therefore, it is unlikely to have impacted the environmental conditions of the subject property.

Dudek also searched the City’s online records portal on May 8, 2026, to review any available records pertaining to the subject property (City of Oakley 2026a). The following records were identified pertaining to the subject property:
▪ A Short Form Services Agreement for Hacienda Estates Environmental Analysis was identified for the subject property that outlines the services agreement of professional consulting services between the City of Oakley and Raney Planning & Management Inc., effective as of March 2026. The scope of work for the project covered by the agreement includes the subdivision of the subject property into five lots for the foreseeable development of single-family residences and associated utilities and access driveways (City of Oakley 2026b) (Appendix E).
▪ Resolution No. 41-23: A Resolution of the City Council of the City of Oakley Adopting a General Plan Amendment to Repeal the 2015-2023 City of Oakley Housing Element and Adopt the City of Oakley Housing Element of the General Plan for the Period of 2023-2031 in Compliance with State Housing Element Law.

The subject property was identified as an underutilized parcel that is considered for future residential use in the General Plan.

Neither of these records indicates a spill or leak of hazardous materials to the environment; therefore, it is unlikely they have impacted the environmental conditions of the subject property.

6.3.1.1 Zoning and Land Use
Dudek accessed the City of Oakley’s General Plan for information about zoning of the subject property and surrounding properties (City of Oakley 2022). The subject property and the western- and southern-adjoining properties are zoned as Rural Residential, the northern-adjoining properties are zoned as Residential Very Low, and the eastern-adjoining properties are identified as unincorporated areas outside of the City of Oakley boundaries.

6.3.2 Contra Costa County

6.3.2.1 Agriculture/Weights and Measures Department
Dudek contacted the Contra Costa County Department of Agriculture/Weights and Measures on April 22, 2026, to obtain information on agricultural use records that pertain to the subject property. A response was received on May 1, 2026, that no records were identified pertaining to the subject property (Appendix E).

6.3.2.2 Office of the Assessor
Dudek contacted the Contra Costa County Assessor’s Office on April 22, 2026, to obtain information on building permits and records that pertain to the subject property. A response was received on April 23, 2026, that the Assessor’s Office has no responsive public records pertaining to the subject property and referred to an additional search through the City of Oakley (Appendix E).
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6.3.2.3 Department of Conservation and Development
Dudek contacted the Contra Costa County Department of Conservation and Development on April 22, 2026, to obtain information on building permits and records that pertain to the subject property. A response was received on April 23, 2026, that the Department of Conservation and Development have no responsive records as the subject property is located in the City of Oakley, and referred to an additional search through the City of Oakley (see Section 6.3.1) (Appendix E).

Dudek also searched the Contra Costa County Public Works Department’s Department of Conservation and Development ePermits Center on May 1, 2026, to review available building, planning, and public words records (Contra Costa County 2026). No responsive building, planning, or public works records were identified pertaining to the subject property address or Assessor’s Parcel Number.

6.3.2.4 Hazardous Materials Program
Dudek contacted the Contra Costa County Health Division on April 22, 2026, to obtain information on hazardous materials storage/usage, ASTs/USTs, and releases or investigations associated with the subject property. A response was received on April 29, 2026, from the County’s Hazardous Materials Program that did not identify any records pertaining to the subject property dating back to 1986 (Appendix E).

6.3.3 Ironhouse Sanitary District
Dudek contacted the Ironhouse Sanitary District on May 8, 2026, to obtain records pertaining to septic systems, on-site wastewater treatment systems, and individual sewage systems associated with the subject property. As of the date of this report, a response has not been received (Appendix E).

6.3.4 CalRecycle Solid Waste Information System
Dudek reviewed the California Department of Resources Recycling and Recovery (CalRecycle) Solid Waste Information System online database on May 8, 2026 (CalRecycle 2026). The database has information for all solid waste facilities, operation, and disposal sites in California.

No sites were identified on the subject property. One site, Brentwood Transfer Station, was mapped approximately 1 mile south of the subject property. This site is an active permitted Large Volume Transfer/Processing Facility. This site has been inspected quarterly since 2014. Violations were noted in 2017 and 2022 pertaining to Litter Control and Records and Reporting violations. Neither of these violations is indicative of an uncontrolled spill or release of hazardous materials to the environment and no enforcement actions were noted.

Based on the distance from the subject property, it is unlikely that this site has impacted the environmental conditions of the subject property.

6.3.5 State Water Resources Control Board

6.3.5.1 GeoTracker Database
Dudek searched GeoTracker, the SWRCB’s data management system, for sites that impact, or have the potential to impact, water quality in California. Records include sites that require cleanup, various unregulated projects, and 322
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permitted facilities (SWRCB 2026b). One site was identified within 0.5 miles of the subject property. This site, Cooks Battery Reclamation Site, was also identified in the EDR Radius Map and is discussed in Section 5, Public Agency Records Search.

6.3.5.2 GeoTracker PFAS Database
Per- and polyfluoroalkyl substances (PFAS) constitute a large family of fluorinated chemicals (exceeding several thousand compounds) that vary widely in their chemical and physical properties. They have been used for commercial and industrial purposes and as a result have been found in the environment (i.e., water, soil, and air).

The persistence and mobility of some PFAS, combined with decades of widespread use in industrial processes, certain types of firefighting foams, and consumer products, have resulted in their presence in the environment at trace levels across the globe (ITRC 2023).

As of April 2024, and confirmed in May 2025, EPA finalized National Primary Drinking Water Regulations for six PFAS chemicals, including perfluorooctanoic acid (PFOA), perfluorooctanesulfonic acid (PFOS), perfluorononanoic acid (PFNA), perfluorohexanesulfonic acid (PFHxS), hexafluoropropylene oxide dimer acid (HFPO-DA), and mixtures of two or more of PFHxS, PFNA, HFPO-DA, and perfluorobutanesulfonic acid (PFBS). EPA set maximum contaminant levels (MCLs) for these six chemicals (or chemical mixtures), which are enforceable health-based limits, and a hazard index (ratio of the measured concentration to the health-based concentration) for mixtures of two or more of PFHxS, PFNA, HFPO-DA, and PFBS (EPA 2026). Additionally, under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), PFOA, PFOS, and their salts and structural isomers were designated hazardous substances by EPA (EPA 2025). EPA also established Regional Screening Levels for PFOA and PFOS in soil (EPA 2024). As such, the presence of PFOA, PFOS, PFNA, PFHxS, and/or HFPO-DA, in any combination above their MCLs and/or reportable quantities, could be identified as a REC under ASTM E1527-21.

SWRCB has created a GeoTracker PFAS Map, which is a data management system for sites with PFAS investigative orders1, other sites with PFAS data, and water well systems with PFAS data (SWRCB 2026c). One location with PFAS data was identified within 1 mile of the subject property: a GAMA – Priority Basin Project (U.S. Geological Survey) water supply well. The water supply well was identified as S17-SacV26 and is located approximately 0.89 miles north of the subject property. When last measured in July 2023, PFHxS and PFBS were detected at 3.6 and

1.1 nanograms per liter, respectively. No concentrations of PFOA, PFOS, PFNA, PFHxS, HFPO-DA, and/or PFBS were detected in excess of their respective MCLs. Based on this information, there are no known data suggesting PFAS above action levels in the local water supply at the subject property.

Based on review of the GeoTracker PFAS database on May 8, 2026, there are no records to confirm or deny that PFAS is present at the subject property. Research and studies indicate that PFAS is present in most environments; thus, it is possible that it is present on or near the subject property. As there are no data available to confirm or deny the presence of PFAS at the subject property, this is considered a data gap. However, because the site and adjacent properties have not been used for industrial or commercial uses typically associated with PFAS (e.g., landfill, firefighting, plating, etc.), it is unlikely that PFAS would constitute a REC. Therefore, the data gap is considered not significant.
1 The SWRCB Division of Drinking Water issued multiple General Orders for investigation and monitoring of PFAS in public water systems (SWRCB 2025), along with a series of Investigative Orders issued for airports, chrome plating facilities, landfills, bulk fuel terminals, and public water treatment facilities. The various orders, issuance of which first began in 2019, targeted public water systems and facilities likely to have PFAS, such as airports, landfills, and chrome plating facilities. 323
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6.3.6 Department of Toxic Substances Control
Dudek searched the EnviroStor database management system used for tracking cleanup, permitting, enforcement, and investigation efforts at hazardous waste facilities and sites with known contamination (DTSC 2026). The subject property was not identified in the database; however, three sites were identified within 1 mile of the subject property. These sites, Cooks Battery (Oakley Battery), 76-Acre Fourth High School, and Thompson Property, were also identified in the EDR Radius Map Report; sites that may have impacted the subject property are discussed in Section 5.

6.3.7 California Environmental Protection Agency Regulated Site Portal Dudek reviewed the CalEPA Regulated Site Portal, which contains information about environmentally regulated sites and facilities in California (CalEPA 2026). Data sources for the portal include California Environmental Reporting System, the Department of Toxic Substances Control EnviroStor, the SWRCB GeoTracker, the California Integrated Water Quality System, and the Federal Toxics Release Inventory.

CalEPA sites are generally administrative in nature, identifying sites that have environmental permits or that handle hazardous materials or generate hazardous waste, but that do not necessarily have an uncontrolled release of hazardous substances to the environment.

The subject property was not identified in the database. Five sites were identified within 0.50 miles of the subject property and are discussed below.
▪ Comcast Cable. This site was identified at 5111 Sellers Avenue, approximately 0.13 miles south of the subject property. The site was listed as a chemical storage facility that stores 120–599 gallons of diesel fuel No. 2 on site. Two violations, that have since returned to compliance, were identified in relation to Hazardous Materials Release Response Plans. These violations are administrative in nature and do not indicate an uncontrolled release of hazardous materials to the environment; therefore, it is unlikely that this site has impacted the environmental conditions of the subject property. ▪ Verizon Wireless. This site was identified at 5480 Sellers Avenue, approximately 0.19 miles northeast of the subject property. The site was identified in the EPA Air Emission Inventory System as a source of air point pollution emissions. This listing is administrative in nature and does not indicate an uncontrolled release of hazardous materials to the environment; therefore, it is unlikely that this site has impacted the environmental conditions of the subject property.
▪ Verizon Wireless Oakley East. This was identified at 5480 Sellers Avenue, approximately 0.19 miles northeast of the subject property. The site was listed as a chemical storage facility that stores 60–119 gallons of electrolyte/sulfuric acid and 120–599 gallons of diesel fuel No. 2 on site. No violations were identified for this site. This listing is administrative in nature and does not indicate an uncontrolled release of hazardous materials to the environment; therefore, it is unlikely that this site has impacted the environmental conditions of the subject property.
▪ 76-Acre Fourth High. This site was also identified in the EnviroStor database and the EDR Radius Map Report and is discussed further in Section 5.
▪ Cooks Battery Reclamation Site. This site was also identified in the GeoTracker database and the EDR Radius Map Report and discussed further in Section 5.
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6.3.8 California Geologic Energy Management Division
Dudek reviewed the California Geologic Energy Management Division database on May 4, 2026 (CalGEM 2026).

No oil and gas wells were identified on the subject property. The subject property was identified within 1 mile of three oil and gas fields: Oakley Gas (abandoned) and Dutch Slough Gas, approximately 0.19 miles north, and Knightsen Gas (abandoned), adjoining to the east of the subject property. Twenty-nine oil and gas wells were mapped within 1 mile of the subject property. Fifteen wells were identified as plugged gas wells, 1 well was identified as a canceled gas well, and 13 wells were identified as plugged dry holes. None of these wells were identified within

0.25 miles of the subject property. Each of the oil and gas wells identified in the EDR Radius Map Report (Appendix C) were also verified in the California Geologic Energy Management Division database.

6.3.9 National Pipeline Mapping System
Dudek searched the National Pipeline Mapping System online database on May 4, 2026, which provides a public map viewer application that displays data related to gas transmission and hazardous liquid pipelines, liquefied natural gas plants, and breakout tanks under the Department of Transportation Pipeline and Hazardous Material Safety Administration jurisdiction (PHMSA 2026).

No pipelines were identified on or within 1 mile of the subject property. No accidents or incidents were reported within 1 mile of the subject property.
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7 Site Reconnaissance
A site reconnaissance was conducted on April 27, 2026, by Talulah Patch and Olivia Cowley of Dudek. The site reconnaissance consisted of walking the subject property, taking notes on observations, and taking photographs. Photographs are presented in Appendix F. Talulah Patch and Olivia Cowley were unaccompanied during the site reconnaissance.

7.1 Description of Subject Property and Surroundings
The subject property consists of an approximately 5.39-acre rectangular-shaped parcel of land that makes up the subject property. Access to the subject property is from Sellers Avenue to the east (Photograph 1). During the site reconnaissance, the subject property included tilled land and uncultivated grasses (Photographs 2 and 3). A well and well pump housing were located in the southeast portion of the subject property, in an area with various debris and parked vehicles (Photographs 4–6). The subject property was split into two areas separated by a grouping of trees in the center. The areas consisted of tilled dirt without plants and tilled dirt with weeds. A small area with irrigation and flowering plants was located on the western property boundary. At the time of the site reconnaissance there was no visible flowing water on site, but the muddy appearance of the road and visible plywood indicated that there is occasional flooding on the access road (Photographs 7 and 8).

The northwest corner of the property contained a dirt courtyard and an animal shed. At the time of the site reconnaissance, horses were observed in the animal shed and goats were observed in the courtyard.

Wooden transmission line poles were observed along the southern border of the subject property. There was one smaller wooden pole located within the fenceline; at the time of the site reconnaissance, the base of the pole was supported by a cloth tied to a nearby tree (Photograph 9).

As observed during the site reconnaissance, the subject property is bordered by the following:
▪ To the north by a plowed field and stand of trees (Photograph 10) ▪ To the west by multiple plowed fields and residential areas along Crismore Drive (Photographs 11 and 12) ▪ To the east by uncultivated agricultural fields (Photograph 13) ▪ To the south by a sheep pasture (Photograph 14)
The main areas of interest noted during the site reconnaissance are described in the following section.

7.2 Summary of Observations
Potable Water Supply or Source
Potable water supply and evidence of water utilities or wells were observed on the subject property.

Sewage Disposal System
There was one portable toilet observed in the northwest corner of the property within the boundary of the animal shed courtyard (Photograph 15).
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Wetlands and Natural Waterways
No naturally flowing water was observed on the subject property.

Surface Water Discharge
There is no significant grade to the property. Surface water that does not infiltrate into the tilled or vegetated areas of the subject property would likely flow south toward the property roadway as it is eroded at a lower grade than the surrounding area due to vehicle traffic. Small pools of standing water were observed in the roadway at the entrance of the subject property.

Distressed Vegetation
No distressed vegetation was observed on the subject property.

Indications of Solid Debris Storage
There were multiple areas where solid debris storage or evidence of dumping was observed on the subject property (Photographs 16–19).

Hazardous Material and Petroleum Product Use and Storage Hazardous material and petroleum product storage or use were observed on the subject property.

Within the northwest corner of the property, there was evidence of petroleum product use. In the animal shed courtyard (Photograph 20), multiple small containers of motor oil were observed.

Hazardous material and petroleum product storage was observed on the southern border of the subject property, including a car battery and a portable generator on the front of a parked trailer (Photograph 21). Also observed along the southern border were various motor oil bottles, trash receptacles, an empty recycled water tote, and a diesel tractor (Photographs 22–24).

Unnaturally Discolored Ponds or Flowing Waters
No unnaturally discolored pools or flowing water were observed on the subject property.

Groundwater Wells, Cisterns, Cesspools, or Septic Tanks A groundwater well was observed on the subject property.

Polychlorinated Biphenyl-Containing Items
Prior to 1978, polychlorinated biphenyls (PCBs) were often used in transformers and capacitors, specifically in cooling oils. PCBs were also used in hydraulic oils. Releases from these types of equipment may have resulted in PCB impacts to surrounding soil. The age of existing equipment may not necessarily indicate the presence of PCBs as the equipment may have been replaced over time.
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Transformers were not observed on the subject property during the site reconnaissance. No other evidence of PCB-containing items, such as hydraulic equipment, was observed during the site reconnaissance.

Sumps or Ponds
No sumps or ponds were observed on the subject property.

Abnormal Odor
No abnormal odors were noted on the subject property.

Surface Staining, Corrosion, and Soil Disturbances
No staining or soil disturbances, including de minimis stains, were observed during the site reconnaissance.

Tanks, Drums, Totes, and Intermediate Bulk Containers
Multiple storage tanks, drums, totes, or other bulk containers were observed on the subject property. No oil staining was observed around the visible tanks. As the contents are unknown, these containers are discussed below under Unidentified Substance Containers. Large aboveground tanks were observed on both the eastern- and westernadjoining properties, as discussed above under Hazardous Material and Petroleum Product Use and Storage.

Agricultural Use
Based on a review of historical sources (see Section 8), the subject property has been used for agricultural purposes from as early as 1939 to the present. During the site reconnaissance, the subject property was partially tilled.

Irrigation piping debris was scattered throughout the field.

Off-Site Sources
As discussed above, ASTs were observed on properties adjoining to both the east and west. There was no evidence of releases or other indications that these storage tanks have impacted the environmental condition of the subject property.

Fill Material
Fill material was not observed on the subject property.

Unidentified Substance Containers
Multiple unidentified substance containers were observed on the subject property. The animal shed courtyard in the northwest corner of the property (Photographs 19 and 20) contained an apparent water tote along the wall of the animal shed, and drums whose contents were unable to be identified. On the southern border of the property, multiple drums were observed next to the fenceline on the adjoining property (Photograph 25). A large metal drum of unknown contents was observed next to the well pump house (Photograph 26). No evidence of spills or leaks were observed in the areas around these containers.

Pipelines
No hazardous material pipelines were observed on the subject property. 328
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8 Site History
Based on a review of the historical aerial photographs, historical topographic maps, agency records, and the city directory report, the subject property has not been commercially or residentially developed. The subject property was vacant and undeveloped land between at least 1914 and 1916, before it was used for agricultural purposes from at least 1939 to 1984. Between at least 1993 and 2006, the subject property was vacant land. Multiple structures were observed on the southern boundary of the subject property in 2009 through 2016. In 2020, the subject property was vacant land. Between 2020 and 2024, structures were constructed on the northwestern corner and on the southern boundary of the subject property. By 2025, the structure on the southern boundary of the subject property was removed and areas of apparent material storage were observed along the western and southern boundaries of the subject property.

There is a gap in site history between 1916 and 1939, 1943 and 1954, 1968 and 1978, 1984 and 1993, and 1998 and 2006. This constitutes a data failure and is discussed further in Section 13.

All of the adjoining properties were vacant and undeveloped land between at least 1914 and 1916. Between 1939 and 1968, all of the adjoining properties were primarily used for agricultural purposes. Structures were observed on the southeastern- and northern-adjoining properties starting in 1943 and 1954, with a water well was depicted on the northern-adjoining property in 1954. In 1979, the adjoining properties consisted of a mix of predominantly agricultural land and vacant land with a rural residence on the northern-adjoining property; conditions were similar until at least 1984. A residence was constructed on the western-adjoining property between 1979 and 1982. By 1993, the northern, eastern, and southern properties were no longer used for agricultural purposes. The westernadjoining property appears to have been used for agricultural purposes until at least 1998. In 1998, the eastern-, portions of the northern-, and a majority of the southern-adjoining properties were vacant land. Small structures were observed on the southern-adjoining property in 1998. One of the eastern-adjoining properties appeared to be tilled land in 2012. Apparent junk yards and material storage areas were observed on the western- and southernadjoining properties in 2012 and 2009, respectively. The apparent junk yard on the southern-adjoining property was removed by 2016. Between 2006 and present-day, the adjoining properties consisted of a mix of residences and predominantly vacant land with small structures,

8.1 Historical Aerial Photographs
Dudek reviewed historical aerial photographs obtained from EDR for 1939, 1958, 1963, 1966, 1979, 1982, 1984, 1993, 1998, 2006, 2009, 2012, 2016, 2020, and 2024 (Appendix G). Dudek also reviewed aerial photographs from Google Earth for 2025 (Google Earth 2026). The photographs provided background information to assess the possibility of past activities that could present environmental concerns. The aerial photographs are described in Table 2.

Table 2. Summary of Aerial Photographs
Date Subject Property Adjoining and Surrounding Properties 1939 Row crops are observed
throughout the subject
property.

A line of trees followed by row crops and a rural residence adjoin the subject property to the north, The row crops observed on the subject property extend onto the southern- and western-adjoining properties.

Portions of orchards can also be seen on the western- and southernadjoining properties. The eastern-adjoining property consists of a 329
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Table 2. Summary of Aerial Photographs
Date Subject Property Adjoining and Surrounding Properties narrow strip of vacant land, followed by a north–south-trending road where present-day Sellers Avenue can be found, as well as orchards.

A railroad track is observed in the northeastern surrounding area.

Surrounding properties consist of a mix of apparent row crops, orchards, rural residences, and fallowed land.
1958 Orchards are present
throughout the subject
property.

Portions of the northern-adjoining property appear to be fallowed land. The narrow strip of vacant land previously observed on the eastern-adjoining area is now observed as a row of trees. Areas of previously observed row crops now appear to be used as orchards on the northern-, western-, and southern-adjoining properties, The surrounding properties appear similar to the 1939 aerial photograph. 1963 The subject property appears
similar to the 1958 aerial
photograph.

Additional areas of fallowed land are observed on the northern- and eastern-adjoining properties. The surrounding properties appear similar to the 1958 aerial photograph.
1966 The subject property appears
similar to the 1963 aerial
photograph.

Additional areas of fallowed land are observed on the northernadjoining property. The rest of the adjoining properties appear similar to the 1963 aerial photograph. Additional areas of fallowed land are observed on northern and southern surrounding properties. The rest of the surrounding properties appear similar to the 1963 aerial photograph.
1979 A majority of the subject
property appears to be
fallowed land with small areas
of remnant orchards observed
in the northern and
southwestern regions of the
subject property.

The majority of the southern- and western-adjoining properties appear to be fallowed land. Portions of the eastern-adjoining property appear to be orchards. Additional areas of fallowed and cleared land are observed on northern, eastern, and southern surrounding properties. Additional rural residences are observed on western and northeastern surrounding properties. An area of greenhouses is observed approximately 0.10 miles north of the subject property. 1982 The subject property appears
similar to the 1979 aerial
photograph.

Surface soil disturbances are observed on the southern-adjoining property. The rest of the adjoining properties appear similar to the 1979 aerial photograph. Additional areas of cleared land are observed on southern surrounding properties. Additional greenhouses are observed approximately 0.10 miles north of the subject property. The rest of the surrounding properties appear similar to the 1979 aerial photograph.
1984 The subject property appears
similar to the 1982 aerial
photograph.

An unidentified circular object is observed on the southern-adjoining property. The rest of the adjoining properties appear similar to the 1982 aerial photograph. Additional areas of cleared land are observed on eastern and southeastern properties. The rest of the surrounding properties appear similar to the 1982 aerial photograph. 1993 The remaining orchards
previously observed on the
subject property have been
removed. The subject property
consists of mostly vacant land
with some scattered trees.

The line of trees previously observed adjoining to the east of the subject property has been removed. The previously observed unidentified circular object on the southern-adjoining property has been removed. The remaining orchards previously observed on the northern-adjoining property have been removed. Additional structures and areas of cleared land are observed in all of the greater surrounding areas.
1998 The subject property appears
to be cleared land.

The southern-adjoining property appears to be mostly vacant land with some small structures along its northern boundary. The easternadjoining properties appear to be cleared land. Multiple structures 330
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Table 2. Summary of Aerial Photographs
Date Subject Property Adjoining and Surrounding Properties previously observed on a northern surrounding property, approximately 0.10 miles north of the subject property, have been removed. The rest of the surrounding properties appear similar to the 1993 aerial photograph.
2006 The subject property appears
similar to the 1998 aerial
photograph.

The orchards previously observed on the western-adjoining property have been removed. A rural residence is observed on the westernadjoining property. Additional structures are observed on the southern-adjoining property. The rest of the adjoining properties appear similar to the 1998 aerial photograph. Residential developments are observed on western and northwestern
surrounding properties approximately 0.25 miles from the subject property. Large areas where previous orchards were observed on northern and northwestern surrounding properties are now observed as cleared land. The rest of the surrounding properties appear similar to the 1998 aerial photograph.
2009 Multiple structures are
observed on the southern
boundary of the subject
property. The rest of the
subject property appears
similar to the 2006 aerial
photograph.

The region of the southern-adjoining property that adjoins to the southwest of the subject property appears to be used as a junk yard.

The rest of the adjoining properties appear similar to the 2006 aerial photograph. Additional areas of cleared land are observed in the northern, eastern, and southern surrounding areas. The rest of the surrounding properties appear similar to the 2006 aerial photograph. 2012 An additional structure is
observed on the southern end
of the subject property. The
rest of the subject property
appears similar to the 2009
aerial photograph.

The southeastern-adjoining property appears to be tilled land.

Portions of the western-adjoining property appear to be used as a junk yard. The rest of the adjoining properties appear similar to the 2009 aerial photograph. An additional area of cleared land is observed on a northeastern surrounding property. An area of discolored surface soil is observed approximately 0.25 miles southwest of the subject property. The rest of the surrounding properties appear similar to the 2009 aerial photograph. 2016 The subject property appears
similar to the 2012 aerial
photograph.

The apparent junk yard items previously observed on the southernadjoining property have been cleared. Additional structures are observed on the western- and northern-adjoining properties.

Continued residential development is observed on northwestern surrounding properties. The rest of the surrounding properties appear similar to the 2012 aerial photograph.
2020 The structures previously
observed on the subject
property have been removed.

The subject property is
depicted as vacant land with
multiple scattered trees.

Most of the structures previously observed on the southern-adjoining property have been removed. Multiple structures previously observed on the western-adjoining property have been removed. The rest of the adjoining properties appear similar to the 2016 aerial photograph. Continued residential development is observed on northwestern surrounding properties. The rest of the surrounding properties appear similar to the 2016 aerial photograph. 2024 Multiple structures are
observed on the subject
property, one in the
northwestern corner and one
on the southern boundary of
the subject property. The rest
An additional structure is observed on the southern-adjoining property. One of the eastern-adjoining properties is observed as tilled land. The rest of the adjoining properties appear similar to the 2020 aerial photograph. An eastern surrounding property approximately

0.25 miles east of the subject property appears to be used for 331
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Table 2. Summary of Aerial Photographs
Date Subject Property Adjoining and Surrounding Properties of the subject property
appears to be vacant land.
agricultural purposes. The rest of the surrounding properties appear similar to the 2020 aerial photograph.
2025 The structure previously
observed in the southern
region of the subject property
has been removed. Areas of
apparent material storage are
observed along the western
and southern boundaries of
the subject property. The rest
of the subject property
appears similar to the 2024
aerial photograph.

One of the eastern-adjoining properties appears to be used for agricultural purposes. The rest of the adjoining and surrounding properties appear similar to the 2024 aerial photograph.

Note: See Appendix G for corresponding photographs for 1939 through 2024. The 2025 Google Earth photo is available online and therefore is not included in Appendix G.

8.2 Historical Topographic Maps
Dudek reviewed historical topographic maps from 1914, 1916, 1940, 1943, 1954, 1968, 1978, 2012, 2015, 2018, and 2021 (Appendix B). The topographic maps are a historical source that can be used to document the prior use of the subject property and surrounding area. The topographic maps are described in Table 3.

Table 3. Summary of Topographic Maps
Date Subject Property Adjoining and Surrounding Properties 1914 The subject property is depicted
as vacant and undeveloped
land.

A north–south-trending road is depicted adjoining to the east of the subject property where present-day Sellers Avenue can be found. All of the adjoining properties are depicted as vacant and undeveloped land. A southeast–northwest-trending railroad is depicted approximately 0.32 miles northeast of the subject property. Multiple creeks are depicted approximately 0.25 miles west and east of the subject property. The rest of the surrounding areas consist of a mix of vacant and undeveloped land, networks of roads, and scattered small structures.
1916 The subject property is depicted
similarly to the 1914
topographic map.

The adjoining and surrounding properties are depicted similarly to the 1914 topographic map.
1940 The subject property is depicted
as an orchard.

All of the adjoining properties are depicted as orchards. Much of the surrounding properties are depicted as orchards with an increased number of structures depicted in all of the surrounding areas.
1943 The subject property is depicted
similarly to the 1940
topographic map.

The adjoining and surrounding properties are depicted similarly to the 1940 topographic map.
1954 The subject property is depicted
similarly to the 1943
topographic map.

A structure previously depicted on the southeastern-adjoining property is no longer depicted. A water well is depicted on the northern-adjoining property. The rest of the adjoining properties are depicted similarly to the 1943 topographic map. The creek 332
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Table 3. Summary of Topographic Maps
Date Subject Property Adjoining and Surrounding Properties previously depicted approximately 0.25 miles east of the subject property is no longer depicted. A sewage disposal site is depicted approximately 1 mile southwest of the subject property. Additional structures are observed in all of the greater surrounding areas.

Additional water wells are depicted scattered throughout the surrounding properties.
1968 The subject property is depicted
similarly to the 1954
topographic map.

The unimproved road previously depicted on the northernadjoining property has been reconfigured. The rest of the adjoining properties are depicted similarly to the 1954 topographic map. Additional roads and structures are depicted in all of the surrounding areas.
1978 The subject property is no
longer depicted as an orchard.

The subject property is depicted
as vacant and undeveloped
land.

The orchards previously depicted in the adjoining and surrounding areas are no longer depicted. The rest of the adjoining properties are depicted similarly to the 1968 topographic map. Additional roads, reconfigured networks of roads, and small structures are depicted in all the greater surrounding areas.
2012 Individual structures and site
features are no longer depicted
on the 2012 topographic map.

No site features are depicted
on the subject property.

Individual structures and site features are no longer depicted on the 2012 topographic map. Roads are depicted on the northern-, eastern-, and southern-adjoining properties. No other site features are depicted on the adjoining properties. A gaging station is depicted approximately 0.78 miles southwest of the subject property. The rest of the surrounding areas are predominantly depicted as multiple networks of roads,
2015 The subject property is depicted
similarly to the 2012
topographic map.

Multiple roads that were previously depicted on the 2012 topographic map on adjoining and surrounding properties are no longer depicted. The gaging station previously depicted approximately 0.78 miles southwest of the subject property is no longer depicted. The rest of the adjoining and surrounding properties are depicted similarly to the 2012 topographic map. 2018 The subject property is depicted
similarly to the 2015
topographic map.

Roads are depicted along each of the adjoining properties.

Additional roads are depicted in all of the surrounding areas. 2021 The subject property is depicted
similarly to the 2018
topographic map.

One of the roads previously depicted on the eastern-adjoining property is no longer depicted. The rest of the adjoining and surrounding properties are depicted similarly to the 2018 topographic map.

Note: See Appendix B for corresponding maps.

8.3 Fire Insurance Maps
Historical Sanborn fire insurance maps were requested from EDR. Sanborn maps provide information regarding the historical uses of the subject property and surrounding properties. Sanborn maps typically exist for cities with populations of 2,000 or more; the coverage is dependent on the location of the subject site within the city limits.

The Sanborn Map Report lists the subject property as an unmapped property; no additional information was included in the report. The Sanborn Map Report is provided in Appendix H. 333
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8.4 City Directory
City directory listings were requested from EDR (Appendix I). Table 4 details the findings of the city directory abstract.

Multiple listings were identified for the subject property address, 5321 Sellers Avenue. Findings for the subject property and for adjoining property addresses are summarized in Table 4.

Table 4. Summary of City Directory Listings
Address Date Listings
Subject Property
5321 Sellers Avenue 2010–2022 Signature Electric
2005–2010 Residential
Adjoining to the West
3300 Crismore Drive 2000–2024 Residential
2005 Science Research Laboratory
Adjoining to the North
5381 Sellers Avenue 2024 Residential
2005–2022 Furlong Electric Co., Furlong Electric & Integration 1992–2000 Residential
Adjoining to the East
5304 Sellers Avenue 2010–2024 Residential
5310 Sellers Avenue 2000–2024 Residential
5370 Sellers Avenue 1995–2024 Residential
Adjoining to the South
5239 Sellers Avenue 2000–2005 Occupant Unknown
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9 Previous Environmental Site Assessments
No previous environmental assessments were provided to Dudek during this Phase I ESA. 335
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10 Vapor Encroachment
Dudek evaluated vapor encroachment to determine whether there is a potential for vapors originating from contaminated soil and/or groundwater to occur in the subsurface below the existing and potential future on-site structures. Information obtained from other sources (geologic and hydrogeological information, site reconnaissance, local regulatory agency responses), as discussed in this report, was also considered. The VEC assessment was conducted in accordance with ASTM E2600-22 guidance (ASTM 2022). The EDR Radius Map Report (Appendix C) was used to evaluate listed contaminated sites as identified in federal, state, and local databases.

No sites were identified as having groundwater contamination or soil vapor contamination that could impact the subject property; as such, no VEC was identified.
336
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11 Other Considerations
This section discusses other considerations including non-ASTM scope considerations that were included in this Phase I ESA based on the conditions at the subject property. These items are not required to be evaluated per the ASTM Standard but may still pose environmental health and safety risks.

Asbestos
Asbestos has been specifically designated a hazardous substance pursuant to CERCLA Section 102, but abatement costs are generally not recoverable under CERCLA. Many building materials commonly contained asbestos until the late 1970s, and a smaller list of building materials contained asbestos in the 1980s, such as drywall, joint compounds, vinyl flooring, roofing, asbestos-cement products, and stucco. Under the Toxic Substances Control Act, EPA banned the use of asbestos in many products, with partial bans occurring in 1989 and 1993. However, a full ban of asbestos products did not occur until 2019. Therefore, if a building was constructed prior to 1989, it is likely it contains asbestos. If it was constructed between 1989 and 2019, it is less likely asbestos is present, but there is still a chance that asbestos was used.

No structures were observed on the subject property prior to 2006; therefore, asbestos is not of concern for the subject property. For sites that were used for agricultural purposes through the late 1970s, it is possible that asbestos-containing concrete water delivery appurtenances were in use. Concrete water delivery appurtenances were not observed on the subject property during the site reconnaissance; therefore, asbestos is not of concern for the subject property.

Lead-Based Paint
Paint manufacturers frequently used lead as a primary paint ingredient through the 1940s and gradually decreased its use in the 1950s and 1960s. The federal department of Housing and Urban Development estimates 30% of homes built in the United States before 1978 contain some lead-based paint (HUD 2011). The Consumer Product Safety Commission prohibited the use of lead-based paints in residential buildings in 1978; however, the use of lead-based paints in commercial and industrial buildings is not prohibited.

No structures were observed on the subject property prior to 2006 and no commercial or industrial structures were identified on the subject property during the site reconnaissance; therefore, lead-based paint is not of concern for the subject property.

Radon
Radon is a radioactive gas that is produced from the natural decay of uranium, radium, and thorium in soil, rock, and groundwater. When radon becomes trapped in buildings and concentrations accumulate, exposure to radon can be a concern.

The EDR Radius Map Report presents radon test results for the vicinity of the subject property. A total of 55 sites within Contra Costa County were evaluated. The radon concentration at these sites averaged 0.760 picocuries per liter (pCi/L) in the first-floor living area, 0.300 pCi/L in the second-floor living area, and 0.525 pCi/L in the basement.

The EPA radon zone for Contra Costa County is 2, which corresponds with average expected indoor radon levels between 2 and 4 pCi/L. The federal radon action level is 4 pCi/L. 337
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12 Findings and Conclusions
Information gathered for this report indicated the following:
▪ Row crops and orchards were observed on the subject property from the 1930s to the 1980s. ▪ The subject property is currently used for livestock grazing and consists of tilled land and uncultivated grasses with multiple vehicles parked throughout.
▪ Structures observed on the subject property include a well and well pump housing located in the southeastern region and an animal shed located in the northwestern corner. ▪ Adjoining properties to the subject property include a plowed field and a stand of trees to the north, plowed fields and residential properties to the west, Sellers Avenue followed by uncultivated agricultural fields to the east, and a sheep pasture to the south.
▪ Solid debris storage, multiple drums, an empty water tote, and chemical containers of contents such as motor oil were observed throughout the subject property during the site reconnaissance. An AST of unidentified contents, a car battery, and a portable generator affixed to a parked trailer were also observed on the subject property. No spills, leaks, or stained surface soils were observed on the subject property at the time of the site reconnaissance.
▪ ASTs were also observed on the eastern- and western-adjoining properties and multiple drums were observed on the southern-adjoining property. No evidence of a spill or leak of hazardous substances was observed at the time of the site reconnaissance.

Dudek performed this Phase I ESA of the subject property in conformance with the scope and limitations of ASTM E1527-21 Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process (ASTM 2021). This report summarizes the research and findings of the Phase I ESA. This assessment did not reveal evidence of HRECs, CRECs, or VECs in connection with the subject property. The REC identified for the subject property is as follows:
▪ As with all agricultural properties, pesticides and herbicides are likely used. The chemicals of concern associated with these compounds, such as organochlorinated compounds and metals, accumulate and persist in shallow soils. Considering the length of time the subject property was used for agricultural purposes (between the 1930s and 1980s), concentrations of chemicals of concern may be above regulatory screening levels. Therefore, the historical agricultural use is considered a REC.

Additional data gaps, which were determined not to be significant, are discussed in Section 13. 338
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13 Limitations

13.1 Data Gaps and Data Failures
As defined in ASTM E1527-21, a data failure is a failure to achieve the historical research objective required by the ASTM Standard even after reviewing the standard historical resources that are reasonably ascertainable and likely to be useful. A data failure is a type of data gap.

The following data failure was identified for this Phase I ESA:
▪ Historical resources were not available between 1916 and 1939, 1943 and 1954, 1968 and 1978, 1984 and 1993, and 1998 and 2006, which is greater than the 5-year interval required by the ASTM Standard.

This constitutes a data failure.

As defined in ASTM E1527-21, a data gap is the lack of or inability to obtain information required by this practice despite good faith efforts. A data gap is considered significant when it affects the ability of the environmental professional to identify RECs.

The following data gaps were identified for this Phase I ESA:
▪ The data failure discussed above. This data gap does not limit the ability to determine RECs and is therefore considered not significant.
▪ The owner did not conduct an environmental lien or activity and use limitation search for the subject property. Based on the available historical and regulatory information, this data gap does not limit the ability to determine RECs and is therefore considered less than significant. However, the lack of a search may affect the user’s ability to qualify for certain liability protections under CERCLA (see Section 6.2). ▪ Dudek did not receive a response from Ironhouse Sanitary District to the records request. Based on the site history, available historical and regulatory information, and present-day use, this did not limit the ability to identify RECs and is therefore not considered significant. ▪ Research and studies indicate that PFAS is present in most environments; thus, it is possible that it is present on or near the subject property. Because there are no data available to confirm or deny the presence of PFAS in groundwater at the subject property, this is considered a data gap. The subject property does not use groundwater as drinking water, there are no nearby industries or activities known to contribute to PFAS contamination, and no nearby drinking water studies have been performed that identified the presence of PFAS. As such, this data gap is not considered significant.

Should Dudek receive information following submission of this Phase I ESA report that completes one of these data gaps and changes the findings of the Phase I ESA report, Dudek will submit the findings to the user in an addendum.

13.2 Report Limitations
The findings and conclusions presented in this report are professional opinions based solely on the indicated data described in this report, as reflected in the discussion in this report of the visual observations of the subject property and vicinity and documentation reviewed and, based on the foregoing, our interpretation of this information and these 339
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documents. Dudek makes no warranty, guarantee, or representation, express or implied, as to statements made by others or information included in documentation reviewed or otherwise provided to Dudek, as described in this report.

This report does not purport to identify or describe all potential contamination or other issues related to the environment respecting the subject property and/or the vicinity. Likewise, it is understood that it is possible that conditions or contamination exist at the subject property or in the vicinity that are not identified in this Phase I ESA.

No warranties or guarantees or representations, expressed or implied, are made by Dudek, except for the representation that this report has been prepared in accordance with the current generally accepted practices and standards consistent with the level of care and skill exercised under similar circumstances by other professionals performing the same or similar services in the same or similar geographical locality. This report, including its conclusions and/or recommendations, is intended exclusively and solely for the purpose outlined herein and for the client identified hereunder. This report may not be relied upon by any other person or entity without the express advance written consent of Dudek specifically identifying such person or entity. Dudek reserves the right to further condition any such third-party use based on matters it deems appropriate under the circumstances, in its sole discretion.

This report is subject to the conditions and restrictions and limitations described in ASTM E1527-21.

In accordance with Section 4.6.1 of ASTM E1527-21, this Phase I ESA is valid as a general matter for not longer than 180 days from the date of the first interview, first review of government records, or first visual inspection. If this Phase I ESA has been prepared for the purposes of a transaction, the report must have been completed no more than 180 days prior to the transaction date to be considered viable. Otherwise, the report must be updated or revised in accordance with ASTM E1527-21.
340
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14 References
ASTM. 2021. E1527-21, Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process. West Conshohocken, Pennsylvania: ASTM International.

ASTM. 2022. E2600-22, Standard Guide for Vapor Encroachment Screening on Property Involved in Real Estate Transactions. West Conshohocken, Pennsylvania: ASTM International.

CalEPA (California Environmental Protection Agency). 2026. Regulated Site Portal. Accessed May 8, 2026. https://siteportal.calepa.ca.gov/nsite/map/results.

CalGEM (California Geologic Energy Management Division). 2026. Well Finder [online database]. Accessed May 4, 2026. https://www.conservation.ca.gov/calgem/Pages/WellFinder.aspx.

CalRecycle (California Department of Resources Recycling and Recovery). 2026. SWIS Facility/Site Search [online database]. Accessed April 30, 2026. https://www2.calrecycle.ca.gov/SolidWaste/Site/Search.

City of Oakley. 2022. City of Oakley General Plan. Adopted January 11, 2022. Accessed May 2026. https://www.oakleyca.gov/DocumentCenter/View/540/Oakley-General-Plan-PDF.

City of Oakley. 2026a. City of Oakley – Online Search for Public Records [online database]. Accessed May 1, 2026. https://mmxsilo.com/PVE.aspx?txtEntityID=4&txtUser=PUB01_OAKLEY&txtPassword= hh987RAx5cknJfYnFgDk&hRemote=0.

City of Oakley. 2026b. Short Form Services Agreement between the City of Oakley and Raney Planning & Management, Inc. for Hacienda Estates Environmental Analysis. March 16, 2026.

Contra Costa County. 2026. Contra Costa County – Public Works Department – Department of Conservation and Development, ePermits Center [online database]. Accessed May 1, 2026. https://acaprod.accela.com/CCC/Account/RegisterConfirm.aspx?UserSeqNum=49804.

DTSC (Department of Toxic Substances Control). 2026. EnviroStor [online database]. Accessed May 8, 2026. https://www.envirostor.dtsc.ca.gov/public/.

DWR (Department of Water Resources). 2026. California Department of Water Resources – Water Data Library (WDL) Station Map [online database]. Accessed May 1, 2026. https://wdl.water.ca.gov/waterdatalibrary/.

EPA (U.S. Environmental Protection Agency). 2024. “Regional Screening Level (RSL) Summary Table.” November 2024. https://semspub.epa.gov/work/HQ/405269.pdf.

EPA. 2025. Consolidated List of Chemicals Subject to the Emergency Planning and Community Right-To-Know Act (EPCRA), Comprehensive Environmental Response, Compensation and Liability Act (CERCLA), and Section 112(r) of the Clean Air Act (CAA), Appendix H. List of PFOA and PFOS, and their Salts and Structural Isomers (By CAS Number). April 2025.
341
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EPA. 2026. “Per- and Polyfluoroalkyl Substances (PFAS), Final PFAS National Primary Drinking Water Regulation.” Last updated May 4, 2026. https://www.epa.gov/sdwa/ and-polyfluoroalkyl-substances-pfas.

ERRG (Engineering/Remediation Resources Group). 2002. Operation and Maintenance Report, Cook Battery Facility, Oakley, California. March 25, 2002. https://www.envirostor.dtsc.ca.gov/getfile?filename=/ public%2Fdeliverable_documents%2F1024274528%2Fcook_operation%20and%20maintenance% 20report.pdf.

Google Earth. 2026. Aerial photographs of the subject property for 2025. Accessed April 23, 2026. https://www.google.com/earth/.

HUD (U.S. Department of Housing and Urban Development). 2011. American Healthy Homes Survey, Lead and Arsenic Findings. April 2011.

ITRC (Interstate Technology & Regulatory Council). 2023. Technical/Regulatory Guidance: Per- and Polyfluoroalkyl Substances (PFAS). September 2023. Accessed May 8, 2026. https://pfas-1.itrcweb.org/wp-content/ uploads/2023/12/Full-PFAS-Guidance-12.11.2023.pdf.

PHMSA (Pipeline and Hazardous Materials Safety Administration). 2026. NPMS Public Map Viewer [web-based mapping application]. Accessed May 4, 2026. https://pvnpms.phmsa.dot.gov/PublicViewer.

SWRCB (State Water Resources Control Board). 2025. “PFAS DDW General Orders.” Last updated April 22, 2026. https://www.waterboards.ca.gov/drinking_water/certlic/drinkingwater/pfas_ddw_general_order/.

SWRCB. 2026a. GAMA Groundwater Information System [online data management system]. Accessed May 1, 2026. https://gamagroundwater.waterboards.ca.gov/gama/gamamap/public/.

SWRCB. 2026b. GeoTracker [online database]. Accessed May 8, 2026. https://geotracker.waterboards.ca.gov/.

SWRCB. 2026c. GeoTracker PFAS map [online database]. Accessed May 8, 2026. https://geotracker.waterboards.ca.gov/map/pfas_map.
342
Appendix A
Qualifications of Environmental Professionals
343

APPENDIX A / QUALIFICATIONS OF ENVIRONMENTAL PROFESSIONALS 16064 A-1
MAY 2026
Environmental
Professional Professional License Degree(s)
Years’ Relevant
Experience Task Performed
Glenna McMahon Professional Engineer,
State of California
Certified Environmental
Manager, State of Nevada
BS, Civil and Environmental
Engineering, University of Vermont
26 Report Preparation/
Review, QA/QC
Stephanie Chao
–
BS, Environmental Engineering
San Diego State University
5 Report Preparation
Talulah Patch Engineer in Training,
State of California
BS, Environmental Engineering,
Rensselaer Polytechnic Institute
1 Site Reconnaissance,
Report Preparation
Olivia Cowley Certified Erosion, Sediment,
and Stormwater Inspector
(CESSWI), Qualified SWPPP
Practitioner (QSP)
BA, Environmental Studies, Lewis
and Clark College
1 Site Reconnaissance
344
Appendix B
Historical Topographic Maps
345
EDR Historical Topo Map Report
Inquiry Number:
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Toll Free: 800.352.0050
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5321 Sellers Avenue Subdivision Project 5321 SELLERS AVE OAKLEY, CA 94561 April 22, 2026 8321160.4 346
EDR Historical Topo Map Report
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Maps Provided:

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EDR and its logos (including Sanborn and Sanborn Map) are trademarks of Environmental Data Resources, LLC or its affiliates. All other trademarks used herein are the property of their respective owners.
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Coordinates:

Latitude:

Longitude:

UTM Zone:

UTM X Meters:

UTM Y Meters:

Elevation:

Contact:

Site Name: Client Name:
2021
2018
2015
2012
1978
1968
1954
1943
1940
1916
1914
04/22/26 5321 Sellers Avenue Subdivision ProjectDUDEK 5321 SELLERS AVE 605 Third Street OAKLEY, CA 94561 Encinitas, CA 92024 8321160.4 Stephanie Chao EDR Topographic Map Library has been searched by EDR and maps covering the target property location as provided by DUDEK were identified for the years listed below. EDR’s Historical Topo Map Report is designed to assist professionals in evaluating potential liability on a target property resulting from past activities. EDRs Historical Topo Map Report includes a search of a collection of public and private color historical topographic maps, dating back to the late 1800s. 16064 37.972805 37° 58' 22" North 5321 Sellers Avenue -121.678797 -121° 40' 44" West Zone 10 North 616043.44 4203620.99 32.00' above sea level This Report contains certain information obtained from a variety of public and other sources reasonably available to Environmental Data Resources, LLC. It cannot be concluded from this Report that coverage information for the target and surrounding properties does not exist from other sources. This Report is provided on an “AS IS”, “AS AVAILABLE” basis. NO WARRANTY EXPRESS OR IMPLIED IS MADE WHATSOEVER IN CONNECTION WITH THIS REPORT.

ENVIRONMENTAL DATA RESOURCES, LLC AND ITS SUBSIDIARIES, AFFILIATES AND THIRD PARTY SUPPLIERS DISCLAIM ALL WARRANTIES, OF ANY

KIND OR NATURE, EXPRESS OR IMPLIED, ARISING OUT OF OR RELATED TO THIS REPORT OR ANY OF THE DATA AND INFORMATION PROVIDED IN

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Any analyses, estimates, ratings, environmental risk levels, or risk codes provided in this Report are provided for illustrative purposes only, and are not intended to provide, nor should they be interpreted as providing any facts regarding, or prediction or forecast of, any environmental risk for any property. Only an assessment performed by a qualified environmental professional can provide findings, opinions or conclusions regarding the environmental risk or conditions in, on or at any property.

Copyright 2026 by Environmental Data Resources, Inc. All rights reserved. Reproduction in any media or format, in whole or in part, of any report or map of Environmental Data Resources, Inc., or its affiliates, is prohibited without prior written permission. 8321160 4 2 347
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Topo Sheet Key
This EDR Topo Map Report is based upon the following USGS topographic map sheets. -
2021 Source Sheets
2021
Brentwood

7.5-minute, 24000
2018 Source Sheets
2018
Brentwood

7.5-minute, 24000
2015 Source Sheets
2015
Brentwood

7.5-minute, 24000
2012 Source Sheets
2012
Brentwood

7.5-minute, 24000
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page
Topo Sheet Key
This EDR Topo Map Report is based upon the following USGS topographic map sheets. -
1978 Source Sheets
1978
Brentwood

7.5-minute, 24000
Aerial Photo Revised 1974
1968 Source Sheets
1968
Brentwood

7.5-minute, 24000
Aerial Photo Revised 1968
1954 Source Sheets
1954
Brentwood

7.5-minute, 24000
Aerial Photo Revised 1949
1943 Source Sheets
1943
BYRON
15-minute, 62500
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Topo Sheet Key
This EDR Topo Map Report is based upon the following USGS topographic map sheets. -
1940 Source Sheets
1940
Byron
15-minute, 62500
Aerial Photo Revised 1940
1916 Source Sheets
1916
Byron
15-minute, 62500
1914 Source Sheets
1914
Brentwood

7.5-minute, 31680
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SITE NAME:

ADDRESS:

CLIENT:

This report includes information from the
following map sheet(s).
-
W E

SW S SE

NW N NE
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SITE NAME:

ADDRESS:

CLIENT:

This report includes information from the
following map sheet(s).
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W E

SW S SE

NW N NE
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SITE NAME:

ADDRESS:

CLIENT:

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following map sheet(s).
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W E

SW S SE

NW N NE
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ADDRESS:

CLIENT:

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following map sheet(s).
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W E

SW S SE

NW N NE
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SITE NAME:

ADDRESS:

CLIENT:

This report includes information from the
following map sheet(s).
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W E

SW S SE

NW N NE
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SITE NAME:

ADDRESS:

CLIENT:

This report includes information from the
following map sheet(s).
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W E

SW S SE

NW N NE
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ADDRESS:

CLIENT:

This report includes information from the
following map sheet(s).
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W E

SW S SE

NW N NE
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SITE NAME:

ADDRESS:

CLIENT:

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following map sheet(s).
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W E

SW S SE

NW N NE
1943 0 Miles 0.25 0.5 1 1.5 5321 Sellers Avenue Subdivision Project 5321 SELLERS AVE OAKLEY, CA 94561 DUDEK TP, BYRON, 1943, 15-minute
8321160 4 13
358
Historical Topo Map
page
SITE NAME:

ADDRESS:

CLIENT:

This report includes information from the
following map sheet(s).
-
W E

SW S SE

NW N NE
1940 0 Miles 0.25 0.5 1 1.5 5321 Sellers Avenue Subdivision Project 5321 SELLERS AVE OAKLEY, CA 94561 DUDEK TP, Byron, 1940, 15-minute
8321160 4 14
359
Historical Topo Map
page
SITE NAME:

ADDRESS:

CLIENT:

This report includes information from the
following map sheet(s).
-
W E

SW S SE

NW N NE
1916 0 Miles 0.25 0.5 1 1.5 5321 Sellers Avenue Subdivision Project 5321 SELLERS AVE OAKLEY, CA 94561 DUDEK TP, Byron, 1916, 15-minute
8321160 4 15
360
Historical Topo Map
page
SITE NAME:

ADDRESS:

CLIENT:

This report includes information from the
following map sheet(s).
-
W E

SW S SE

NW N NE
1914 0 Miles 0.25 0.5 1 1.5 5321 Sellers Avenue Subdivision Project 5321 SELLERS AVE OAKLEY, CA 94561 DUDEK TP, Brentwood, 1914, 7.5-minute
8321160 4 16
361
Appendix C
EDR Radius Map Report
362

FORM-LBC-KKT
The EDR Radius Map™ Report with GeoCheck®
6 Armstrong Road, 4th floor
Shelton, CT 06484
Toll Free: 800.352.0050
www.edrnet.com
5321 Sellers Avenue Subdivision Project
5321 SELLERS AVE
OAKLEY, CA 94561
Inquiry Number: 8321160.2s
April 22, 2026
363

TABLE OF CONTENTS

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SECTION PAGE
Executive Summary ES1
Overview Map 2
Detail Map 3
Map Findings Summary 4
Map Findings 9
Orphan Summary 98
Government Records Searched/Data Currency Tracking GR-1

GEOCHECK ADDENDUM
Physical Setting Source Addendum A-1
Physical Setting Source Summary A-2
Physical Setting SSURGO Soil Map A-5
Physical Setting Source Map A-11
Physical Setting Source Map Findings A-13
Physical Setting Source Records Searched PSGR-1
Disclaimer - Copyright and Trademark Notice
This Report contains certain information obtained from a variety of public and other sources reasonably available to Environmental Data Resources, LLC. It cannot be concluded from this Report that coverage information for the target and surrounding properties does not exist from other sources. This Report is provided on an "AS IS", "AS AVAILABLE" basis. NO WARRANTY EXPRESS OR IMPLIED IS MADE WHATSOEVER IN CONNECTION WITH THIS REPORT. ENVIRONMENTAL DATA RESOURCES, LLC AND ITS SUBSIDIARIES,

AFFILIATES AND THIRD PARTY SUPPLIERS DISCLAIM ALL WARRANTIES, OF ANY KIND OR NATURE, EXPRESS OR IMPLIED,

ARISING OUT OF OR RELATED TO THIS REPORT OR ANY OF THE DATA AND INFORMATION PROVIDED IN THIS REPORT,

INCLUDING WITHOUT LIMITATION, ANY WARRANTIES REGARDING ACCURACY, QUALITY, CORRECTNESS, COMPLETENESS,

COMPREHENSIVENESS, SUITABILITY, MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, NON-INFRINGEMENT, MISAPPROPRIATION, OR OTHERWISE. ALL RISK IS ASSUMED BY THE USER. IN NO EVENT SHALL ENVIRONMENTAL DATA

RESOURCES, LLC OR ITS SUBSIDIARIES, AFFILIATES OR THIRD PARTY SUPPLIERS BE LIABLE TO ANYONE FOR ANY DIRECT,

INCIDENTAL, INDIRECT, SPECIAL, CONSEQUENTIAL OR OTHER DAMAGES OF ANY TYPE OR KIND (INCLUDING BUT NOT LIMITED TO LOSS OF PROFITS, LOSS OF USE, OR LOSS OF DATA) INFORMATION PROVIDED IN THIS REPORT. Any analyses, estimates, ratings, environmental risk levels, or risk codes provided in this Report are provided for illustrative purposes only, and are not intended to provide, nor should they be interpreted as providing any facts regarding, or prediction or forecast of, any environmental risk for any property.

Only an assessment performed by a qualified environmental professional can provide findings, opinions or conclusions regarding the environmental risk or conditions in, on or at any property.

Copyright 2026 by Environmental Data Resources, LLC. All rights reserved. Reproduction in any media or format, in whole or in part, of any report or map of Environmental Data Resources, LLC, or its affiliates, is prohibited without prior written permission.

EDR and its logos (including Sanborn and Sanborn Map) are trademarks of Environmental Data Resources, LLC or its affiliates. All other trademarks used herein are the property of their respective owners.

TC8321160.2s Page 1
364

EXECUTIVE SUMMARY
TC8321160.2s EXECUTIVE SUMMARY 1
A search of available environmental records was conducted by Environmental Data Resources, Inc (EDR).

The report was designed to assist parties seeking to meet the search requirements of EPA’s Standards and Practices for All Appropriate Inquiries (40 CFR Part 312), the ASTM Standard Practice for Environmental Site Assessments (E1527 - 21), the ASTM Standard Practice for Environmental Site Assessments for Forestland or Rural Property (E2247 - 23), the ASTM Standard Practice for Limited Environmental Due Diligence: Transaction Screen Process (E1528 - 22) or custom requirements developed for the evaluation of environmental risk associated with a parcel of real estate.

TARGET PROPERTY INFORMATION

ADDRESS
5321 SELLERS AVE
OAKLEY, CA 94561

COORDINATES
Latitude (North): 37.9728050 - 37˚ 58’ 22.09’’
Longitude (West): 121.6787970 - 121˚ 40’ 43.66’’
Universal Tranverse Mercator: Zone 10
UTM X (Meters): 616046.3
UTM Y (Meters): 4203415.5
Elevation: 32 ft. above sea level

USGS TOPOGRAPHIC MAP ASSOCIATED WITH TARGET PROPERTY
Target Property Map: 50003342 BRENTWOOD, CA
Version Date: 2021

AERIAL PHOTOGRAPHY IN THIS REPORT
Photo Year: 2024
Source: USDA
365
8321160.2s Page 2
10 THOMPSON PROPERTY 1499/1621 DELTA ROAD ENVIROSTOR, SCH Higher 4225, 0.800, SE B9 COOK BATTERY RECLAMA 139 HILL AVENUE CPS-SLIC, CA BOND EXP. PLAN Higher 3624, 0.686, West B8 COOK BATTERY (OAKLEY 139 HILL AVENUE RESPONSE, ENVIROSTOR, CPS-SLIC, HIST Cal-Sites,... Higher 3624, 0.686, West A7 76-ACRE FOURTH HIGH DELTA AND SELLERS ENVIROSTOR, SCH Higher 1230, 0.233, SSE A6 QUINTANA PETROLEUM C SELLERS & DELTA RD CONTRA COSTA SITES Higher 1230, 0.233, SSE 5 VERIZON WIRELESS 5480 SELLERS AVE EMI, CONTRA COSTA SITES, CERS Lower 872, 0.165, NE 4 COMCAST 5111 SELLERS RD RCRA NonGen / NLR, ECHO, E MANIFEST Higher 696, 0.132, South 3 COMCAST OF CALIFORNI 5111 SELLERS AVE EMI, HWTS, HAZNET, CONTRA COSTA SITES Higher 355, 0.067, SW 2 ADVANCED PIPELINE SE 3200 CRISMORE DR RCRA NonGen / NLR, E MANIFEST Higher 294, 0.056, WSW 1 SANDY CARASIS 5310 SELLERS AVENUE RCRA NonGen / NLR, E MANIFEST Higher 103, 0.020, East

MAPPED SITES SUMMARY
Target Property Address:
5321 SELLERS AVE
OAKLEY, CA 94561
Click on Map ID to see full detail.

MAP RELATIVE DIST (ft. & mi.)

ID DATABASE ACRONYMS ELEVATION DIRECTION SITE NAME ADDRESS 366

EXECUTIVE SUMMARY
TC8321160.2s EXECUTIVE SUMMARY 3

TARGET PROPERTY SEARCH RESULTS
The target property was not listed in any of the databases searched by EDR.

DATABASES WITH NO MAPPED SITES
No mapped sites were found in EDR’s search of available ("reasonably ascertainable ") government records either on the target property or within the search radius around the target property for the following databases:

STANDARD ENVIRONMENTAL RECORDS
Lists of Federal NPL (Superfund) sites
NPL National Priority List
Proposed NPL Proposed National Priority List Sites
NPL LIENS Federal Superfund Liens
Lists of Federal Delisted NPL sites
Delisted NPL National Priority List Deletions
Lists of Federal sites subject to CERCLA removals and CERCLA orders FEDERAL FACILITY Federal Facility Site Information listing SEMS Superfund Enterprise Management System
Lists of Federal CERCLA sites with NFRAP
SEMS-ARCHIVE Superfund Enterprise Management System Archive Lists of Federal RCRA facilities undergoing Corrective Action CORRACTS Corrective Action Report
Lists of Federal RCRA TSD facilities
RCRA-TSDF RCRA - Treatment, Storage and Disposal
Lists of Federal RCRA generators
RCRA-LQG RCRA - Large Quantity Generators
RCRA-SQG RCRA - Small Quantity Generators
RCRA-VSQG RCRA - Very Small Quantity Generators (Formerly Conditionally Exempt Small Quantity Generators)
Federal institutional controls / engineering controls registries LUCIS Land Use Control Information System
367

EXECUTIVE SUMMARY
TC8321160.2s EXECUTIVE SUMMARY 4
US ENG CONTROLS Engineering Controls Sites List
US INST CONTROLS Institutional Controls Sites List
Federal ERNS list
ERNS Emergency Response Notification System
Lists of state and tribal landfills and solid waste disposal facilities SWF/LF Solid Waste Information System
Lists of state and tribal leaking storage tanks
LUST Geotracker’s Leaking Underground Fuel Tank Report
INDIAN LUST Leaking Underground Storage Tanks on Indian Land CPS-SLIC Statewide SLIC Cases
Lists of state and tribal registered storage tanks
FEMA UST Underground Storage Tank Listing
UST Active UST Facilities
AST Aboveground Petroleum Storage Tank Facilities
INDIAN UST Underground Storage Tanks on Indian Land
Lists of state and tribal voluntary cleanup sites
VCP Voluntary Cleanup Program Properties
INDIAN VCP Voluntary Cleanup Priority Listing
Lists of state and tribal brownfield sites
BROWNFIELDS Considered Brownfieds Sites Listing

ADDITIONAL ENVIRONMENTAL RECORDS
Local Brownfield lists
US BROWNFIELDS A Listing of Brownfields Sites
Local Lists of Landfill / Solid Waste Disposal Sites
WMUDS/SWAT Waste Management Unit Database
SWRCY Recycler Database
HAULERS Registered Waste Tire Haulers Listing
INDIAN ODI Report on the Status of Open Dumps on Indian Lands DEBRIS REGION 9 Torres Martinez Reservation Illegal Dump Site Locations ODI Open Dump Inventory
IHS OPEN DUMPS Open Dumps on Indian Land
Local Lists of Hazardous waste / Contaminated Sites
US HIST CDL Delisted National Clandestine Laboratory Register CDL Clandestine Drug Labs
Toxic Pits Toxic Pits Cleanup Act Sites
368

EXECUTIVE SUMMARY
TC8321160.2s EXECUTIVE SUMMARY 5
CERS HAZ WASTE California Environmental Reporting System Hazardous Waste US CDL National Clandestine Laboratory Register
Local Lists of Registered Storage Tanks
SWEEPS UST SWEEPS UST Listing
HIST UST Hazardous Substance Storage Container Database CERS TANKS California Environmental Reporting System (CERS) Tanks CA FID UST Facility Inventory Database
Local Land Records
LIENS Environmental Liens Listing
LIENS 2 CERCLA Lien Information
DEED Deed Restriction Listing
Records of Emergency Release Reports
HMIRS Hazardous Materials Information Reporting System
CHMIRS California Hazardous Material Incident Report System LDS Land Disposal Sites Listing
MCS Military Cleanup Sites Listing
SPILLS 90 SPILLS 90 data from FirstSearch
Other Ascertainable Records
FUDS Formerly Used Defense Sites
DOD Department of Defense Sites
SCRD DRYCLEANERS State Coalition for Remediation of Drycleaners Listing US FIN ASSUR Financial Assurance Information

EPA WATCH LIST EPA WATCH LIST
2020 COR ACTION 2020 Corrective Action Program List
TSCA Toxic Substances Control Act
TRIS Toxic Chemical Release Inventory System
SSTS Section 7 Tracking Systems
ROD Records Of Decision
RMP Risk Management Plans
RAATS RCRA Administrative Action Tracking System
PRP Potentially Responsible Parties
PADS PCB Activity Database System
ICIS Integrated Compliance Information System
FTTS FIFRA/ TSCA Tracking System - FIFRA (Federal Insecticide, Fungicide, & Rodenticide Act)/TSCA (Toxic Substances Control Act)
MLTS Material Licensing Tracking System
COAL ASH DOE Steam-Electric Plant Operation Data
COAL ASH EPA Coal Combustion Residues Surface Impoundments List PCB TRANSFORMER PCB Transformer Registration Database
RADINFO Radiation Information Database
HIST FTTS FIFRA/TSCA Tracking System Administrative Case Listing DOT OPS Incident and Accident Data
CONSENT Superfund (CERCLA) Consent Decrees
INDIAN RESERV Indian Reservations
FUSRAP Formerly Utilized Sites Remedial Action Program
UMTRA Uranium Mill Tailings Sites
LEAD SMELTERS Lead Smelter Sites
369

EXECUTIVE SUMMARY
TC8321160.2s EXECUTIVE SUMMARY 6
US AIRS Aerometric Information Retrieval System Facility Subsystem US MINES Mines Master Index File
MINES MRDS Mineral Resources Data System
ABANDONED MINES Abandoned Mines
FINDS Facility Index System/Facility Registry System
DOCKET HWC Hazardous Waste Compliance Docket Listing
UXO Unexploded Ordnance Sites
ECHO Enforcement & Compliance History Information
FUELS PROGRAM EPA Fuels Program Registered Listing
PFAS NPL Superfund Sites with PFAS Detections Information PFAS FEDERAL SITES Federal Sites PFAS Information
PFAS TSCA PFAS Manufacture and Imports Information
PFAS TRIS List of PFAS Added to the TRI
PFAS RCRA MANIFEST PFAS Transfers Identified In the RCRA Database Listing PFAS ATSDR PFAS Contamination Site Location Listing
PFAS WQP Ambient Environmental Sampling for PFAS
PFAS NPDES Clean Water Act Discharge Monitoring Information

PFAS PROJECT NORTHEASTERN UNIVERSITY PFAS PROJECT
PFAS ECHO Facilities in Industries that May Be Handling PFAS Listing PFAS ECHO FIRE TRAIN Facilities in Industries that May Be Handling PFAS Listing PFAS PT 139 AIRPORT All Certified Part 139 Airports PFAS Information Listing AQUEOUS FOAM NRC Aqueous Foam Related Incidents Listing BIOSOLIDS ICIS-NPDES Biosolids Facility Data
UST FINDER UST Finder Database
UST FINDER RELEASE UST Finder Releases Database
PFAS PFAS Investigation Site Location Listing
AQUEOUS FOAM Former Fire Training Facility Assessments Listing CHROME PLATING Chrome Plating Facilities Listing
Cortese "Cortese" Hazardous Waste & Substances Sites List CUPA Listings CUPA Resources List
DRYCLEANERS Cleaner Facilities
EMI Emissions Inventory Data
ENF Enforcement Action Listing
Financial Assurance Financial Assurance Information Listing ICE Inspection, Compliance and Enforcement
HIST CORTESE Hazardous Waste & Substance Site List
HWP EnviroStor Permitted Facilities Listing
HWT Registered Hazardous Waste Transporter Database
HWTS Hazardous Waste Tracking System
HAZNET Facility and Manifest Data
MINES Mines Site Location Listing
MWMP Medical Waste Management Program Listing
NPDES NPDES Permits Listing
PEST LIC Pesticide Regulation Licenses Listing
PROC Certified Processors Database
Notify 65 Proposition 65 Records
HAZMAT Hazardous Material Facilities
UIC UIC Listing

UIC GEO UIC GEO (GEOTRACKER)
WASTEWATER PITS Oil Wastewater Pits Listing
WDS Waste Discharge System
WIP Well Investigation Program Case List

MILITARY PRIV SITES MILITARY PRIV SITES (GEOTRACKER)

PROJECT PROJECT (GEOTRACKER)
WDR Waste Discharge Requirements Listing
370

EXECUTIVE SUMMARY
TC8321160.2s EXECUTIVE SUMMARY 7
CIWQS California Integrated Water Quality System

CERS CERS

NON-CASE INFO NON-CASE INFO (GEOTRACKER)

OTHER OIL GAS OTHER OIL & GAS (GEOTRACKER)

PROD WATER PONDS PROD WATER PONDS (GEOTRACKER)

SAMPLING POINT SAMPLING POINT (GEOTRACKER)
WELL STIM PROJ Well Stimulation Project (GEOTRACKER)
ABAND AIRFIELDS Abandoned & Little-Known Airfields Listing DRYCLEANERS Drycleaner Facility Listing

EDR HIGH RISK HISTORICAL RECORDS
EDR Exclusive Records
EDR MGP EDR Proprietary Manufactured Gas Plants
EDR Hist Auto EDR Exclusive Historical Auto Stations
EDR Hist Cleaner EDR Exclusive Historical Cleaners

EDR RECOVERED GOVERNMENT ARCHIVES
Exclusive Recovered Govt. Archives
RGA LF Recovered Government Archive Solid Waste Facilities List RGA LUST Recovered Government Archive Leaking Underground Storage Tank SURROUNDING SITES: SEARCH RESULTS
Surrounding sites were identified in the following databases.

Elevations have been determined from the USGS Digital Elevation Model and should be evaluated on a relative (not an absolute) basis. Relative elevation information between sites of close proximity should be field verified. Sites with an elevation equal to or higher than the target property have been differentiated below from sites with an elevation lower than the target property.

Page numbers and map identification numbers refer to the EDR Radius Map report where detailed data on individual sites can be reviewed.

Sites listed in bold italics are in multiple databases.

Unmappable (orphan) sites are not considered in the foregoing analysis.

STANDARD ENVIRONMENTAL RECORDS
Lists of state- and tribal (Superfund) equivalent sites RESPONSE: Identifies confirmed release sites where DTSC is involved in remediation, either in a lead or oversight capacity. These confirmed release sites are generally high-priority and high potential risk.

A review of the RESPONSE list, as provided by EDR, has revealed that there is 1 RESPONSE site within approximately 1 mile of the target property.

Equal/Higher Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ COOK BATTERY (OAKLEY 139 HILL AVENUE W 1/2 - 1 (0.686 mi.) B8 42 Database: RESPONSE, Date of Government Version: 01/16/2026 371

EXECUTIVE SUMMARY
TC8321160.2s EXECUTIVE SUMMARY 8
AWP Facility Id: 07360035
Status: Certified / Operation & Maintenance
Facility Id: 07360035
Lists of state- and tribal hazardous waste facilities
ENVIROSTOR: The Department of Toxic Substances Control’s (DTSC’s) Site Mitigation and Brownfields Reuse Program’s (SMBRP’s) EnviroStor database identifes sites that have known contamination or sites for which there may be reasons to investigate further. The database includes the following site types: Federal Superfund sites (National Priorities List (NPL)); State Response, including Military Facilities and State Superfund; Voluntary Cleanup; and School sites. EnviroStor provides similar information to the information that was available in CalSites, and provides additional site information, including, but not limited to, identification of formerly-contaminated properties that have been released for reuse, properties where environmental deed restrictions have been recorded to prevent inappropriate land uses, and risk characterization information that is used to assess potential impacts to public health and the environment at contaminated sites.

A review of the ENVIROSTOR list, as provided by EDR, and dated 01/16/2026 has revealed that there are 3 ENVIROSTOR sites within approximately 1 mile of the target property.

Equal/Higher Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ 76-ACRE FOURTH HIGH DELTA AND SELLERS SSE 1/8 - 1/4 (0.233 mi.) A7 36 Facility Id: 70000141
Status: No Further Action
COOK BATTERY (OAKLEY 139 HILL AVENUE W 1/2 - 1 (0.686 mi.) B8 42 Facility Id: 07360035
Status: Certified / Operation & Maintenance
THOMPSON PROPERTY 1499/1621 DELTA ROAD SE 1/2 - 1 (0.800 mi.) 10 95 Facility Id: 07010010
Status: Inactive - Withdrawn

ADDITIONAL ENVIRONMENTAL RECORDS
Local Lists of Hazardous waste / Contaminated Sites
HIST Cal-Sites: Formerly known as ASPIS, this database contains both known and potential hazardous substance sites. The source is the California Department of Toxic Substance Control. No longer updated by the state agency. It has been replaced by ENVIROSTOR.

A review of the HIST Cal-Sites list, as provided by EDR, and dated 08/08/2005 has revealed that there is 1 HIST Cal-Sites site within approximately 1 mile of the target property.

Equal/Higher Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ COOK BATTERY (OAKLEY 139 HILL AVENUE W 1/2 - 1 (0.686 mi.) B8 42 372

EXECUTIVE SUMMARY
TC8321160.2s EXECUTIVE SUMMARY 9
SCH: This category contains proposed and existing school sites that are being evaluated by DTSC for possible hazardous materials contamination. In some cases, these properties may be listed in the CalSites category. depending on the level of threat to public health and safety or the. environment they pose.

A review of the SCH list, as provided by EDR, and dated 01/16/2026 has revealed that there is 1 SCH site within approximately 0.25 miles of the target property.

Equal/Higher Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ 76-ACRE FOURTH HIGH DELTA AND SELLERS SSE 1/8 - 1/4 (0.233 mi.) A7 36 Facility Id: 70000141
Status: No Further Action
Other Ascertainable Records
RCRA NonGen / NLR: RCRAInfo is EPA’s comprehensive information system, providing access to data supporting the Resource Conservation and Recovery Act (RCRA) of 1976 and the Hazardous and Solid Waste Amendments (HSWA) of 1984. The database includes selective information on sites which generate, transport, store, treat and/or dispose of hazardous waste as defined by the Resource Conservation and Recovery Act (RCRA). Non-Generators do not presently generate hazardous waste.

A review of the RCRA NonGen / NLR list, as provided by EDR, and dated 11/30/2025 has revealed that there are 3 RCRA NonGen / NLR sites within approximately 0.25 miles of the target property.

Equal/Higher Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ SANDY CARASIS 5310 SELLERS AVENUE E 0 - 1/8 (0.020 mi.) 1 9 EPA ID:: CAC003171699
ADVANCED PIPELINE SE 3200 CRISMORE DR WSW 0 - 1/8 (0.056 mi.) 2 13 EPA ID:: CAC003148035
COMCAST 5111 SELLERS RD S 1/8 - 1/4 (0.132 mi.) 4 22
EPA ID:: CAC003336394
E MANIFEST: EPA established a national system for tracking hazardous waste shipments electronically.

This system, known as ?e-Manifest,? will modernize the nation?s cradle-to-grave hazardous waste tracking process while saving valuable time, resources, and dollars for industry and states.

A review of the E MANIFEST list, as provided by EDR, and dated 11/30/2025 has revealed that there are 3 E MANIFEST sites within approximately 0.25 miles of the target property.

Equal/Higher Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ SANDY CARASIS 5310 SELLERS AVENUE E 0 - 1/8 (0.020 mi.) 1 9 ADVANCED PIPELINE SE 3200 CRISMORE DR WSW 0 - 1/8 (0.056 mi.) 2 13 COMCAST 5111 SELLERS RD S 1/8 - 1/4 (0.132 mi.) 4 22
373

EXECUTIVE SUMMARY
TC8321160.2s EXECUTIVE SUMMARY 10
CA BOND EXP. PLAN: Department of Health Services developed a site-specific expenditure plan as the basis for an appropriation of Hazardous Substance Cleanup Bond Act funds. It is not updated.

A review of the CA BOND EXP. PLAN list, as provided by EDR, and dated 01/01/1989 has revealed that there is 1 CA BOND EXP. PLAN site within approximately 1 mile of the target property.

Equal/Higher Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ COOK BATTERY RECLAMA 139 HILL AVENUE W 1/2 - 1 (0.686 mi.) B9 94 CONTRA COSTA SITES: Lists includes sites from the Underground Tank Program, Hazardous Waste Generator Program & Business Plan 12185 Program
A review of the CONTRA COSTA SITES list, as provided by EDR, and dated 01/21/2026 has revealed that there are 3 CONTRA COSTA SITES sites within approximately 0.25 miles of the target property.

Equal/Higher Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ COMCAST OF CALIFORNI 5111 SELLERS AVE SW 0 - 1/8 (0.067 mi.) 3 16 Facility Id: FA0034290
QUINTANA PETROLEUM C SELLERS & DELTA RD SSE 1/8 - 1/4 (0.233 mi.) A6 36 Facility Id: FA0030956
Lower Elevation Address Direction / Distance Map ID Page ____________________ ________ ___________________ _____ _____ VERIZON WIRELESS 5480 SELLERS AVE NE 1/8 - 1/4 (0.165 mi.) 5 26 Facility Id: FA0030849
374

EXECUTIVE SUMMARY
TC8321160.2s EXECUTIVE SUMMARY 11
Due to poor or inadequate address information, the following sites were not mapped. Count: 1 records.

Site Name Database(s)
____________ ____________

COWELL RANCH/VINEYARDS AT MARSH CR CPS-SLIC
375
EDR Inc.
4 0
4 0
4 0
4 0
4 0
4 0
40 40
40 4 0
4 0
4 0
376
EDR Inc.
40 40
377

MAP FINDINGS SUMMARY
Search
Distance Target Total
Database Property (Miles) < 1/8 1/8 - 1/4 1/4 - 1/2 1/2 - 1 > 1 Plotted

STANDARD ENVIRONMENTAL RECORDS
Lists of Federal NPL (Superfund) sites
NPL 1.000 0 0 0 0 NR 0
Proposed NPL 1.000 0 0 0 0 NR 0
NPL LIENS 1.000 0 0 0 0 NR 0
Lists of Federal Delisted NPL sites
Delisted NPL 1.000 0 0 0 0 NR 0
Lists of Federal sites subject to
CERCLA removals and CERCLA orders
FEDERAL FACILITY 0.500 0 0 0 NR NR 0
SEMS 0.500 0 0 0 NR NR 0
Lists of Federal CERCLA sites with NFRAP
SEMS-ARCHIVE 0.500 0 0 0 NR NR 0
Lists of Federal RCRA facilities
undergoing Corrective Action
CORRACTS 1.000 0 0 0 0 NR 0
Lists of Federal RCRA TSD facilities
RCRA-TSDF 0.500 0 0 0 NR NR 0
Lists of Federal RCRA generators
RCRA-LQG 0.250 0 0 NR NR NR 0
RCRA-SQG 0.250 0 0 NR NR NR 0
RCRA-VSQG 0.250 0 0 NR NR NR 0
Federal institutional controls /
engineering controls registries
LUCIS 0.500 0 0 0 NR NR 0
US ENG CONTROLS 0.500 0 0 0 NR NR 0
US INST CONTROLS 0.500 0 0 0 NR NR 0
Federal ERNS list
ERNS TP NR NR NR NR NR 0
Lists of state- and tribal
(Superfund) equivalent sites
RESPONSE 1.000 0 0 0 1 NR 1
Lists of state- and tribal
hazardous waste facilities
ENVIROSTOR 1.000 0 1 0 2 NR 3
Lists of state and tribal landfills
and solid waste disposal facilities
SWF/LF 0.500 0 0 0 NR NR 0
TC8321160.2s Page 4
378

MAP FINDINGS SUMMARY
Search
Distance Target Total
Database Property (Miles) < 1/8 1/8 - 1/4 1/4 - 1/2 1/2 - 1 > 1 Plotted Lists of state and tribal leaking storage tanks
LUST 0.500 0 0 0 NR NR 0
INDIAN LUST 0.500 0 0 0 NR NR 0
CPS-SLIC 0.500 0 0 0 NR NR 0
Lists of state and tribal registered storage tanks
FEMA UST 0.250 0 0 NR NR NR 0
UST 0.250 0 0 NR NR NR 0
AST 0.250 0 0 NR NR NR 0
INDIAN UST 0.250 0 0 NR NR NR 0
Lists of state and tribal voluntary cleanup sites
VCP 0.500 0 0 0 NR NR 0
INDIAN VCP 0.500 0 0 0 NR NR 0
Lists of state and tribal brownfield sites
BROWNFIELDS 0.500 0 0 0 NR NR 0

ADDITIONAL ENVIRONMENTAL RECORDS
Local Brownfield lists
US BROWNFIELDS 0.500 0 0 0 NR NR 0
Local Lists of Landfill / Solid
Waste Disposal Sites
WMUDS/SWAT 0.500 0 0 0 NR NR 0
SWRCY 0.500 0 0 0 NR NR 0
HAULERS TP NR NR NR NR NR 0
INDIAN ODI 0.500 0 0 0 NR NR 0
DEBRIS REGION 9 0.500 0 0 0 NR NR 0
ODI 0.500 0 0 0 NR NR 0
IHS OPEN DUMPS 0.500 0 0 0 NR NR 0
Local Lists of Hazardous waste /
Contaminated Sites
US HIST CDL TP NR NR NR NR NR 0
HIST Cal-Sites 1.000 0 0 0 1 NR 1
SCH 0.250 0 1 NR NR NR 1
CDL TP NR NR NR NR NR 0
Toxic Pits 1.000 0 0 0 0 NR 0
CERS HAZ WASTE 0.250 0 0 NR NR NR 0
US CDL TP NR NR NR NR NR 0
Local Lists of Registered Storage Tanks
SWEEPS UST 0.250 0 0 NR NR NR 0
HIST UST 0.250 0 0 NR NR NR 0
CERS TANKS 0.250 0 0 NR NR NR 0
CA FID UST 0.250 0 0 NR NR NR 0
Local Land Records
LIENS TP NR NR NR NR NR 0
TC8321160.2s Page 5
379

MAP FINDINGS SUMMARY
Search
Distance Target Total
Database Property (Miles) < 1/8 1/8 - 1/4 1/4 - 1/2 1/2 - 1 > 1 Plotted LIENS 2 TP NR NR NR NR NR 0
DEED 0.500 0 0 0 NR NR 0
Records of Emergency Release Reports
HMIRS TP NR NR NR NR NR 0
CHMIRS TP NR NR NR NR NR 0
LDS TP NR NR NR NR NR 0
MCS TP NR NR NR NR NR 0
SPILLS 90 TP NR NR NR NR NR 0
Other Ascertainable Records
RCRA NonGen / NLR 0.250 2 1 NR NR NR 3
FUDS 1.000 0 0 0 0 NR 0
DOD 1.000 0 0 0 0 NR 0
SCRD DRYCLEANERS 0.500 0 0 0 NR NR 0
US FIN ASSUR TP NR NR NR NR NR 0
EPA WATCH LIST TP NR NR NR NR NR 0
2020 COR ACTION 0.250 0 0 NR NR NR 0
TSCA TP NR NR NR NR NR 0
TRIS TP NR NR NR NR NR 0
SSTS TP NR NR NR NR NR 0
ROD 1.000 0 0 0 0 NR 0
RMP TP NR NR NR NR NR 0
RAATS TP NR NR NR NR NR 0
PRP TP NR NR NR NR NR 0
PADS TP NR NR NR NR NR 0
ICIS TP NR NR NR NR NR 0
FTTS TP NR NR NR NR NR 0
MLTS TP NR NR NR NR NR 0
COAL ASH DOE TP NR NR NR NR NR 0
COAL ASH EPA 0.500 0 0 0 NR NR 0
PCB TRANSFORMER TP NR NR NR NR NR 0
RADINFO TP NR NR NR NR NR 0
HIST FTTS TP NR NR NR NR NR 0
DOT OPS TP NR NR NR NR NR 0
CONSENT 1.000 0 0 0 0 NR 0
INDIAN RESERV 1.000 0 0 0 0 NR 0
FUSRAP 1.000 0 0 0 0 NR 0
UMTRA 0.500 0 0 0 NR NR 0
LEAD SMELTERS TP NR NR NR NR NR 0
US AIRS TP NR NR NR NR NR 0
US MINES 0.250 0 0 NR NR NR 0
MINES MRDS 0.250 0 0 NR NR NR 0
ABANDONED MINES 0.250 0 0 NR NR NR 0
FINDS TP NR NR NR NR NR 0
DOCKET HWC TP NR NR NR NR NR 0
UXO 1.000 0 0 0 0 NR 0
ECHO TP NR NR NR NR NR 0
FUELS PROGRAM 0.250 0 0 NR NR NR 0
PFAS NPL 0.250 0 0 NR NR NR 0
PFAS FEDERAL SITES 0.250 0 0 NR NR NR 0
TC8321160.2s Page 6
380

MAP FINDINGS SUMMARY
Search
Distance Target Total
Database Property (Miles) < 1/8 1/8 - 1/4 1/4 - 1/2 1/2 - 1 > 1 Plotted PFAS TSCA 0.250 0 0 NR NR NR 0
PFAS TRIS 0.250 0 0 NR NR NR 0
PFAS RCRA MANIFEST 0.250 0 0 NR NR NR 0
PFAS ATSDR 0.250 0 0 NR NR NR 0
PFAS WQP 0.250 0 0 NR NR NR 0
PFAS NPDES 0.250 0 0 NR NR NR 0
PFAS PROJECT 0.250 0 0 NR NR NR 0
PFAS ECHO 0.250 0 0 NR NR NR 0
PFAS ECHO FIRE TRAIN 0.250 0 0 NR NR NR 0
PFAS PT 139 AIRPORT 0.250 0 0 NR NR NR 0
AQUEOUS FOAM NRC 0.250 0 0 NR NR NR 0
BIOSOLIDS TP NR NR NR NR NR 0
UST FINDER 0.250 0 0 NR NR NR 0
UST FINDER RELEASE 0.500 0 0 0 NR NR 0
E MANIFEST 0.250 2 1 NR NR NR 3
PFAS 0.250 0 0 NR NR NR 0
AQUEOUS FOAM 0.250 0 0 NR NR NR 0
CA BOND EXP. PLAN 1.000 0 0 0 1 NR 1
CHROME PLATING 0.500 0 0 0 NR NR 0
Cortese 0.500 0 0 0 NR NR 0
CUPA Listings 0.250 0 0 NR NR NR 0
DRYCLEANERS 0.250 0 0 NR NR NR 0
EMI TP NR NR NR NR NR 0
ENF TP NR NR NR NR NR 0
Financial Assurance TP NR NR NR NR NR 0
ICE TP NR NR NR NR NR 0
HIST CORTESE 0.500 0 0 0 NR NR 0
HWP 1.000 0 0 0 0 NR 0
HWT 0.250 0 0 NR NR NR 0
HWTS TP NR NR NR NR NR 0
HAZNET TP NR NR NR NR NR 0
MINES 0.250 0 0 NR NR NR 0
MWMP 0.250 0 0 NR NR NR 0
NPDES TP NR NR NR NR NR 0
PEST LIC TP NR NR NR NR NR 0
PROC 0.500 0 0 0 NR NR 0
Notify 65 1.000 0 0 0 0 NR 0
HAZMAT 0.250 0 0 NR NR NR 0
CONTRA COSTA SITES 0.250 1 2 NR NR NR 3
UIC TP NR NR NR NR NR 0
UIC GEO TP NR NR NR NR NR 0
WASTEWATER PITS 0.500 0 0 0 NR NR 0
WDS TP NR NR NR NR NR 0
WIP 0.250 0 0 NR NR NR 0
MILITARY PRIV SITES TP NR NR NR NR NR 0
PROJECT TP NR NR NR NR NR 0
WDR TP NR NR NR NR NR 0
CIWQS TP NR NR NR NR NR 0
CERS TP NR NR NR NR NR 0
NON-CASE INFO TP NR NR NR NR NR 0
OTHER OIL GAS TP NR NR NR NR NR 0
TC8321160.2s Page 7
381

MAP FINDINGS SUMMARY
Search
Distance Target Total
Database Property (Miles) < 1/8 1/8 - 1/4 1/4 - 1/2 1/2 - 1 > 1 Plotted PROD WATER PONDS TP NR NR NR NR NR 0
SAMPLING POINT TP NR NR NR NR NR 0
WELL STIM PROJ TP NR NR NR NR NR 0
ABAND AIRFIELDS 0.500 0 0 0 NR NR 0
DRYCLEANERS 0.250 0 0 NR NR NR 0

EDR HIGH RISK HISTORICAL RECORDS
EDR Exclusive Records
EDR MGP 1.000 0 0 0 0 NR 0
EDR Hist Auto 0.125 0 NR NR NR NR 0
EDR Hist Cleaner 0.125 0 NR NR NR NR 0

EDR RECOVERED GOVERNMENT ARCHIVES
Exclusive Recovered Govt. Archives
RGA LF TP NR NR NR NR NR 0
RGA LUST TP NR NR NR NR NR 0
- Totals -- 0 5 6 0 5 0 16
NOTES:

TP = Target Property
NR = Not Requested at this Search Distance
Sites may be listed in more than one database
TC8321160.2s Page 8
382
Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Institutional Control Indicator: No
Environmental Control Indicator: No
Corrective Action Priority Ranking: No NCAPS ranking
Non-TSDFs Where RCRA CA has Been Imposed Universe: No
Subject to Corrective Action Universe: No
202 GPRA Corrective Action Baseline: No
2018 GPRA Renewals Baseline: Not on the Baseline
2018 GPRA Permit Baseline: Not on the Baseline
Sub-Part K Indicator: Not reported
Hazardous Secondary Material Indicator: N
Federal Facility Indicator: Not reported
Active Site State-Reg Handler: ---
Federal Universal Waste: No
Universal Waste Destination Facility: No
Universal Waste Indicator: No
Off-Site Waste Receipt: No
Underground Injection Control: No
Smelting Melting and Refining Furnace Exemption: No
Small Quantity On-Site Burner Exemption: No
Recycler Activity with Storage: No
Transfer Facility Activity: No
Transporter Activity: No
Mixed Waste Generator: No
Importer Activity: No
Short-Term Generator Activity: No
Operator Type: Other
Operator Name: Sandy Carasis
Owner Type: Other
Owner Name: Sandy Carasis
Mailing City,State,Zip: OAKLEY, CA 94561
Mailing Address: 5310 SELLERS AVE
State District: Not reported
State District Owner: Not reported
Active Site Indicator: Not reported
Accessibility: Not reported
Biennial Report Cycle: Not reported
Non-Notifier: Not reported
Federal Waste Generator Description: Not a generator, verified Land Type: Not reported
EPA Region: 09
Contact Title: Not reported
Contact Email: [email protected]
Contact Fax: Not reported
Contact Telephone: 925-382-8076
Contact City,State,Zip: OAKLEY, CA 94561
Contact Address: 5310 SELLERS AVENUE
Contact Name: SANDY CARASIS
EPA ID: CAC003171699
Handler City,State,Zip: OAKLEY, CA 94561
Handler Address: 5310 Sellers Avenue
Handler Name: 5310 Sellers Avenue
Date Form Received by Agency: 20220418
RCRA Listings:
103 ft.

0.020 mi.

Relative:

Higher
Actual:
32 ft.
< 1/8 OAKLEY, CA 94561
East 5310 SELLERS AVENUE E MANIFEST CAC003171699
1 SANDY CARASIS RCRA NonGen / NLR 1027207507
TC8321160.2s Page 9
383
Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Electronic Manifest Broker: No
Non Storage Recycler Activity: No
Current Record: Yes
Spent Lead Acid Battery Exporter: No
Spent Lead Acid Battery Importer: No
Recognized Trader Exporter: No
Recognized Trader Importer: No
Large Quantity Handler of Universal Waste: No
State District Owner: Not reported
Federal Waste Generator Description: Not a generator, verified Handler Name: 5310 SELLERS AVENUE
Receive Date: 20220418
Historic Generators:

Owner/Operator Email: Not reported
Owner/Operator Fax: Not reported
Owner/Operator Telephone Ext: Not reported
Owner/Operator Telephone: 925-382-8076
Owner/Operator City,State,Zip: OAKLEY, CA 94561
Owner/Operator Address: 5310 SELLERS AVENUE
Date Ended Current: Not reported
Date Became Current: Not reported
Legal Status: Other
Owner/Operator Name: SANDY CARASIS
Owner/Operator Indicator: Operator
Owner/Operator Email: Not reported
Owner/Operator Fax: Not reported
Owner/Operator Telephone Ext: Not reported
Owner/Operator Telephone: 925-382-8076
Owner/Operator City,State,Zip: OAKLEY, CA 94561
Owner/Operator Address: 5310 SELLERS AVE
Date Ended Current: Not reported
Date Became Current: Not reported
Legal Status: Other
Owner/Operator Name: SANDY CARASIS
Owner/Operator Indicator: Owner
Handler - Owner Operator:

Sub-Part P Indicator: No
Manifest Broker: No
Recycler Activity Without Storage: No
Exporter of Spent Lead Acid Batteries: No
Importer of Spent Lead Acid Batteries: No
Recognized Trader-Exporter: No
Recognized Trader-Importer: No
Handler Date of Last Change: 20241212
Financial Assurance Required: Not reported
Significant Non-Complier With a Compliance Schedule Universe: No Addressed Significant Non-Complier Universe: No
Unaddressed Significant Non-Complier Universe: No
Significant Non-Complier Universe: No
Groundwater Controls Indicator: N/A
Human Exposure Controls Indicator: N/A
SANDY CARASIS (Continued) 1027207507
TC8321160.2s Page 10
384
Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Transporter Line Number: 1
Manifest Tracking Number: 016576754FLE
Transporter:

Rejection Indicator: N
Manifest Residue Indicator: N
Designated Facility Contact Company Name: Not reported
Designated Facility Location State: AZ
Designated Facility Location Zip: 85344
Designated Facility Location City: PARKER
Designated Facility Location Street 2: Not reported
Designated Facility Location Street 1: 26999 HIGHWAY 95 Designated Facility Location Street Number: Not reported Designated Facility Mail State: AZ
Designated Facility Mail Zip: 85344
Designated Facility Mail City: PARKER
Designated Facility Mail Street 2: 26999 HIGHWAY 95
Designated Facility Mail Street 1: Not reported
Designated Facility Mail Street Number: Not reported
Designated Facility Name: La Paz County Landfill
Designated Facility EPA ID: AZR000520882
Generator Contact Company Name: Not reported
Generator Mail State: CA
Generator Mail Zip: 94561
Generator Mail City: OAKLEY
Generator Mail Street 2: Not reported
Generator Mail Street 1: 5310 SELLERS AVE
Generator Mail Street Number: Not reported
Generator Location Zip: 94561
Generator Location State: CA
Generator Location City: OAKLEY
Generator Location Street 2: Not reported
Generator Location Street 1: 5310 SELLERS AVENUE
Generator Location Street Number: Not reported
Generator Name: Sandy Carasis
Generator EPA ID: CAC003171699
Origin Type: Web
Submission Type: DataImage5Copy
Manifest Status: Signed
Received Date: 20220629
Shipped Date: 20220617
Last Updated Date: 20220719
Manifest Tracking Number: 016576754FLE
E MANIFEST:

Evaluations: No Evaluations Found
Evaluation Action Summary:

Violations: No Violations Found
Facility Has Received Notices of Violations:

NAICS Description: All Other Waste Management Services
NAICS Code: 56299
List of NAICS Codes and Descriptions:

SANDY CARASIS (Continued) 1027207507
TC8321160.2s Page 11
385
Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
State Waste Codes: CA-151
Quantity Non Haz Tons: 12.599999
Quantity Non Haz Kg: 11428.578
Quantity Haz Tons: 0
Quantity Haz Kg: 0
Federal Waste Codes: Not reported
EPA Waste Indicator: N
Consent Number: Not reported
Waste Minimization Code Description: Not reported
Waste Minimization Code: Not reported
Source Code Description: Not reported
Source Code: Not reported
Form Code Description: Not reported
Form Code: Not reported
Waste Density Unit of Measure Description: Not reported Waste Density Unit of Measure Code: Not reported
Waste Density: Not reported
Waste Type Discrepancy Indicator: N
Quantity Discrepancy Indicator: N
Waste Residue Indicator: N
Management Method Description: LANDFILL (WITH PRIOR TREATMENT AND/OR STABILIZATION) Management Method Code: H132
Non-Acute Waste Quantity, in Kilorgrams: 11428.578
Acute Waste Quantity, in Kilograms: 0
Waste Quantity, in Kilograms: 11428.578
Non-Acute Waste Quantity, in Tons: 12.599999
Acute Waste Quantity, in Tons: 0
Waste Quantity, in Tons: 12.599999
Quantity Unit of Measure Description: Cubic Yards
Quantity Unit of Measure Code: Y
Waste Quantity: 15
Container Type Description: Burlap, cloth, paper, or plastic bags Container Type Code: BA
Number of Containers: 154
Non-Hazardous Waste Description: Not reported
U.S. DOT Description: R.Q. Na2212, Asbestos, 9, Pgiii
U.S. DOT ID Number: NA2212
U.S. DOT Hazardous Indicator: Y
Waste Line Number: 1
Manifest Tracking Number: 016576754FLE
Waste Line:

Transporter Name: E C T I
Transporter EPA ID: CAR000049064
Transporter Line Number: 2
Manifest Tracking Number: 016576754FLE
Transporter Name: All Clear Environmental Inc
Transporter EPA ID: CAL000317101
SANDY CARASIS (Continued) 1027207507
TC8321160.2s Page 12
386
Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Institutional Control Indicator: No
Environmental Control Indicator: No
Corrective Action Priority Ranking: No NCAPS ranking
Non-TSDFs Where RCRA CA has Been Imposed Universe: No
Subject to Corrective Action Universe: No
202 GPRA Corrective Action Baseline: No
2018 GPRA Renewals Baseline: Not on the Baseline
2018 GPRA Permit Baseline: Not on the Baseline
Sub-Part K Indicator: Not reported
Hazardous Secondary Material Indicator: N
Federal Facility Indicator: Not reported
Active Site State-Reg Handler: ---
Federal Universal Waste: No
Universal Waste Destination Facility: No
Universal Waste Indicator: No
Off-Site Waste Receipt: No
Underground Injection Control: No
Smelting Melting and Refining Furnace Exemption: No
Small Quantity On-Site Burner Exemption: No
Recycler Activity with Storage: No
Transfer Facility Activity: No
Transporter Activity: No
Mixed Waste Generator: No
Importer Activity: No
Short-Term Generator Activity: No
Operator Type: Other
Operator Name: Robert Whitman
Owner Type: Other
Owner Name: Robert Whitman
Mailing City,State,Zip: OAKLEY, CA 94561
Mailing Address: 4840 BURGUNDY DR
State District: Not reported
State District Owner: Not reported
Active Site Indicator: Not reported
Accessibility: Not reported
Biennial Report Cycle: Not reported
Non-Notifier: Not reported
Federal Waste Generator Description: Not a generator, verified Land Type: Not reported
EPA Region: 09
Contact Title: Not reported
Contact Email: [email protected]
Contact Fax: Not reported
Contact Telephone: 209-815-3822
Contact City,State,Zip: OAKLEY, CA 94561
Contact Address: 4840 BURGUNDY DR
Contact Name: ROBERT WHITMAN
EPA ID: CAC003148035
Handler City,State,Zip: OAKLEY, CA 94561
Handler Address: 3200 Crismore Dr
Handler Name: Advanced Pipeline Services
Date Form Received by Agency: 20211111
RCRA Listings:
294 ft.

0.056 mi.

Relative:

Higher
Actual:
32 ft.
< 1/8 OAKLEY, CA 94561
WSW 3200 CRISMORE DR E MANIFEST CAC003148035
2 ADVANCED PIPELINE SERVICES RCRA NonGen / NLR 1027076253 TC8321160.2s Page 13
387
Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Electronic Manifest Broker: No
Non Storage Recycler Activity: No
Current Record: Yes
Spent Lead Acid Battery Exporter: No
Spent Lead Acid Battery Importer: No
Recognized Trader Exporter: No
Recognized Trader Importer: No
Large Quantity Handler of Universal Waste: No
State District Owner: Not reported
Federal Waste Generator Description: Not a generator, verified Handler Name: ADVANCED PIPELINE SERVICES
Receive Date: 20211111
Historic Generators:

Owner/Operator Email: Not reported
Owner/Operator Fax: Not reported
Owner/Operator Telephone Ext: Not reported
Owner/Operator Telephone: 209-815-3822
Owner/Operator City,State,Zip: OAKLEY, CA 94561
Owner/Operator Address: 4840 BURGUNDY DR
Date Ended Current: Not reported
Date Became Current: Not reported
Legal Status: Other
Owner/Operator Name: ROBERT WHITMAN
Owner/Operator Indicator: Operator
Owner/Operator Email: Not reported
Owner/Operator Fax: Not reported
Owner/Operator Telephone Ext: Not reported
Owner/Operator Telephone: 209-815-3822
Owner/Operator City,State,Zip: OAKLEY, CA 94561
Owner/Operator Address: 4840 BURGUNDY DR
Date Ended Current: Not reported
Date Became Current: Not reported
Legal Status: Other
Owner/Operator Name: ROBERT WHITMAN
Owner/Operator Indicator: Owner
Handler - Owner Operator:

Sub-Part P Indicator: No
Manifest Broker: No
Recycler Activity Without Storage: No
Exporter of Spent Lead Acid Batteries: No
Importer of Spent Lead Acid Batteries: No
Recognized Trader-Exporter: No
Recognized Trader-Importer: No
Handler Date of Last Change: 20211111
Financial Assurance Required: Not reported
Significant Non-Complier With a Compliance Schedule Universe: No Addressed Significant Non-Complier Universe: No
Unaddressed Significant Non-Complier Universe: No
Significant Non-Complier Universe: No
Groundwater Controls Indicator: N/A
Human Exposure Controls Indicator: N/A
ADVANCED PIPELINE SERVICES (Continued) 1027076253
TC8321160.2s Page 14
388
Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Transporter Line Number: 1
Manifest Tracking Number: 022830288JJK
Transporter:

Rejection Indicator: N
Manifest Residue Indicator: N
Designated Facility Contact Company Name: Not reported
Designated Facility Location State: CA
Designated Facility Location Zip: 95691-0000
Designated Facility Location City: WEST SACRAMENTO
Designated Facility Location Street 2: Not reported
Designated Facility Location Street 1: S RIVER RD.

Designated Facility Location Street Number: 1515
Designated Facility Mail State: CA
Designated Facility Mail Zip: 95691
Designated Facility Mail City: WEST SACRAMENTO
Designated Facility Mail Street 2: S RIVER RD.

Designated Facility Mail Street 1: Not reported
Designated Facility Mail Street Number: 1515
Designated Facility Name: Ramos Environmental Services
Designated Facility EPA ID: CAD044003556
Generator Contact Company Name: Not reported
Generator Mail State: CA
Generator Mail Zip: 94561
Generator Mail City: OAKLEY
Generator Mail Street 2: Not reported
Generator Mail Street 1: 4840 BURGUNDY DR
Generator Mail Street Number: Not reported
Generator Location Zip: 94561
Generator Location State: CA
Generator Location City: OAKLEY
Generator Location Street 2: Not reported
Generator Location Street 1: 3200 CRISMORE DR
Generator Location Street Number: Not reported
Generator Name: Advanced Pipeline Services
Generator EPA ID: CAC003148035
Origin Type: Web
Submission Type: DataImage5Copy
Manifest Status: Signed
Received Date: 20211116
Shipped Date: 20211115
Last Updated Date: 20211117
Manifest Tracking Number: 022830288JJK
E MANIFEST:

Evaluations: No Evaluations Found
Evaluation Action Summary:

Violations: No Violations Found
Facility Has Received Notices of Violations:

NAICS Description: Construction Machinery Manufacturing NAICS Code: 33312
List of NAICS Codes and Descriptions:

ADVANCED PIPELINE SERVICES (Continued) 1027076253
TC8321160.2s Page 15
389
Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
State Waste Codes: CA-223
Quantity Non Haz Tons: 1.7723103
Quantity Non Haz Kg: 1607.5386
Quantity Haz Tons: 0
Quantity Haz Kg: 0
Federal Waste Codes: Not reported
EPA Waste Indicator: N
Consent Number: Not reported
Waste Minimization Code Description: Not reported
Waste Minimization Code: Not reported
Source Code Description: Not reported
Source Code: Not reported
Form Code Description: Not reported
Form Code: Not reported
Waste Density Unit of Measure Description: Not reported Waste Density Unit of Measure Code: Not reported
Waste Density: Not reported
Waste Type Discrepancy Indicator: N
Quantity Discrepancy Indicator: N
Waste Residue Indicator: N
Management Method Description: STORAGE, BULKING AND/OR TRANSFER OFF SITE Management Method Code: H141
Non-Acute Waste Quantity, in Kilorgrams: 1607.5386
Acute Waste Quantity, in Kilograms: 0
Waste Quantity, in Kilograms: 1607.5386
Non-Acute Waste Quantity, in Tons: 1.7723103
Acute Waste Quantity, in Tons: 0
Waste Quantity, in Tons: 1.7723103
Quantity Unit of Measure Description: Gallons
Quantity Unit of Measure Code: G
Waste Quantity: 425
Container Type Description: Cargo tanks (tank trucks)
Container Type Code: TT
Number of Containers: 1
Non-Hazardous Waste Description: Non Rcra Hazardous Waste Liquid (Oily Water) U.S. DOT Description: Not reported
U.S. DOT ID Number: Not reported
U.S. DOT Hazardous Indicator: N
Waste Line Number: 1
Manifest Tracking Number: 022830288JJK
Waste Line:

Transporter Name: Ramos Environmental Services
Transporter EPA ID: CAD044003556
ADVANCED PIPELINE SERVICES (Continued) 1027076253
County Code: 7
Year: 2014
City,State,Zip: OAKLEY, CA 94561
Address: 5111 SELLERS AVE
Name: COMCAST OF CALIFORNIA IV INC
EMI:
355 ft.

0.067 mi. CONTRA COSTA SITES
Relative:

Higher
Actual:
33 ft.
< 1/8 OAKLEY, CA 94561 HAZNET
SW 5111 SELLERS AVE HWTS N/A
3 COMCAST OF CALIFORNIA IV INC EMI S112940880
TC8321160.2s Page 16
390
Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Address: 5111 SELLERS AVE
Name: COMCAST OF CALIFORNIA IV INC
Part. Matter 10 Micrometers and Smllr Tons/Yr: 1.7636e-005 Particulate Matter Tons/Yr: 1.7636e-005
SOX - Oxides of Sulphur Tons/Yr: 1.6313e-005
NOX - Oxides of Nitrogen Tons/Yr: 0.005084189
Carbon Monoxide Emissions Tons/Yr: 0.015509064
Reactive Organic Gases Tons/Yr: 7.40139414e-005
Total Organic Hydrocarbon Gases Tons/Yr: 0.000794994
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4841
Air District Name: BA
Facility ID: 22185
Air Basin: SF
County Code: 7
Year: 2016
City,State,Zip: OAKLEY, CA 94561
Address: 5111 SELLERS AVE
Name: COMCAST OF CALIFORNIA IV INC
Part. Matter 10 Micrometers and Smllr Tons/Yr: 1.7636e-005 Particulate Matter Tons/Yr: 1.7636e-005
SOX - Oxides of Sulphur Tons/Yr: 1.6313e-005
NOX - Oxides of Nitrogen Tons/Yr: 0.005084189
Carbon Monoxide Emissions Tons/Yr: 0.01550906
Reactive Organic Gases Tons/Yr: 0.000785925
Total Organic Hydrocarbon Gases Tons/Yr: 0.000794994
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4841
Air District Name: BA
Facility ID: 22185
Air Basin: SF
County Code: 7
Year: 2015
City,State,Zip: OAKLEY, CA 94561
Address: 5111 SELLERS AVE
Name: COMCAST OF CALIFORNIA IV INC
Part. Matter 10 Micrometers and Smllr Tons/Yr: 1.7636e-005 Particulate Matter Tons/Yr: 1.7636e-005
SOX - Oxides of Sulphur Tons/Yr: 1.6313e-005
NOX - Oxides of Nitrogen Tons/Yr: 0.005084189
Carbon Monoxide Emissions Tons/Yr: 0.015509064
Reactive Organic Gases Tons/Yr: 0
Total Organic Hydrocarbon Gases Tons/Yr: 0.000794994
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4841
Air District Name: BA
Facility ID: 22185
Air Basin: SF
COMCAST OF CALIFORNIA IV INC (Continued) S112940880
TC8321160.2s Page 17
391
Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Part. Matter 10 Micrometers and Smllr Tons/Yr: 8.471e-006 Particulate Matter Tons/Yr: 8.471e-006
SOX - Oxides of Sulphur Tons/Yr: 7.835e-006
NOX - Oxides of Nitrogen Tons/Yr: 0.002442029
Carbon Monoxide Emissions Tons/Yr: 0.00744929
Reactive Organic Gases Tons/Yr: 3.5550235e-005
Total Organic Hydrocarbon Gases Tons/Yr: 0.00038185
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4841
Air District Name: BA
Facility ID: 22185
Air Basin: SF
County Code: 7
Year: 2019
City,State,Zip: OAKLEY, CA 94561
Address: 5111 SELLERS AVE
Name: COMCAST OF CALIFORNIA IV INC
Part. Matter 10 Micrometers and Smllr Tons/Yr: 8.471e-006 Particulate Matter Tons/Yr: 8.471e-006
SOX - Oxides of Sulphur Tons/Yr: 7.835e-006
NOX - Oxides of Nitrogen Tons/Yr: 0.002442029
Carbon Monoxide Emissions Tons/Yr: 0.00744929
Reactive Organic Gases Tons/Yr: 3.5550235e-005
Total Organic Hydrocarbon Gases Tons/Yr: 0.00038185
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4841
Air District Name: BA
Facility ID: 22185
Air Basin: SF
County Code: 7
Year: 2018
City,State,Zip: OAKLEY, CA 94561
Address: 5111 SELLERS AVE
Name: COMCAST OF CALIFORNIA IV INC
Part. Matter 10 Micrometers and Smllr Tons/Yr: 1.7636e-005 Particulate Matter Tons/Yr: 1.7636e-005
SOX - Oxides of Sulphur Tons/Yr: 1.6313e-005
NOX - Oxides of Nitrogen Tons/Yr: 0.005084189
Carbon Monoxide Emissions Tons/Yr: 0.015509064
Reactive Organic Gases Tons/Yr: 7.40139414e-005
Total Organic Hydrocarbon Gases Tons/Yr: 0.000794994
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4841
Air District Name: BA
Facility ID: 22185
Air Basin: SF
County Code: 7
Year: 2017
City,State,Zip: OAKLEY, CA 94561
COMCAST OF CALIFORNIA IV INC (Continued) S112940880
TC8321160.2s Page 18
392
Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
SOX - Oxides of Sulphur Tons/Yr: 2.08e-006
NOX - Oxides of Nitrogen Tons/Yr: 0.00101
Carbon Monoxide Emissions Tons/Yr: 0.000989
Reactive Organic Gases Tons/Yr: 5.31e-005
Total Organic Hydrocarbon Gases Tons/Yr: 5.31e-005
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4841
Air District Name: BA
Facility ID: 22185
Air Basin: SF
County Code: 7
Year: 2022
City,State,Zip: OAKLEY, CA 94561
Address: 5111 SELLERS AVE
Name: COMCAST OF CALIFORNIA IV INC
Part. Matter 10 Micrometers and Smllr Tons/Yr: 4.17e-005 Particulate Matter Tons/Yr: 4.2e-005
SOX - Oxides of Sulphur Tons/Yr: 1.88e-006
NOX - Oxides of Nitrogen Tons/Yr: 0.001004832
Carbon Monoxide Emissions Tons/Yr: 0.000989712
Reactive Organic Gases Tons/Yr: 4.664835e-005
Total Organic Hydrocarbon Gases Tons/Yr: 5.31e-005
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4841
Air District Name: BA
Facility ID: 22185
Air Basin: SF
County Code: 7
Year: 2021
City,State,Zip: OAKLEY, CA 94561
Address: 5111 SELLERS AVE
Name: COMCAST OF CALIFORNIA IV INC
Part. Matter 10 Micrometers and Smllr Tons/Yr: 5.412e-006 Particulate Matter Tons/Yr: 5.412e-006
SOX - Oxides of Sulphur Tons/Yr: 5.006e-006
NOX - Oxides of Nitrogen Tons/Yr: 0.001560186
Carbon Monoxide Emissions Tons/Yr: 0.004759268
Reactive Organic Gases Tons/Yr: 2.2712676e-005
Total Organic Hydrocarbon Gases Tons/Yr: 0.00024396
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4841
Air District Name: BA
Facility ID: 22185
Air Basin: SF
County Code: 7
Year: 2020
City,State,Zip: OAKLEY, CA 94561
Address: 5111 SELLERS AVE
Name: COMCAST OF CALIFORNIA IV INC
COMCAST OF CALIFORNIA IV INC (Continued) S112940880
TC8321160.2s Page 19
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Name: JOHN ELLISON
HAZNET:

Longitude: -121.677589
Latitude: 37.970454
Category: STATE
Facility Type: TEMPORARY
Facility Status: Inactive
Contact Fax: Not reported
Contact Phone: Not reported
City,State,Zip: OAKLEY, CA 94561
Contact Address 2: Not reported
Contact Address: 5111 SELLERS AVE
Contact Name: JOHN ELLISON
Owner Fax: Not reported
Owner Phone: Not reported
Owner City,State,Zip: OAKLEY, CA 94561
Owner Address 2: Not reported
Owner Address: 5111 SELLERS AVE
Owner Name: JOHN ELLISON
Mailing City,State,Zip: CA 94561
Mailing Address 2: OA
Mailing Address: 5111 SELLERS AVE
Mailing Name: Not reported
Last Act Date: Not reported
Create Date: 10/08/2004
Inactive Date: 04/25/2005
EPA ID: CAC002582866
City,State,Zip: OAKLEY, CA 94561
Address 2: Not reported
Address: 5111 SELLERS AVE
Name: JOHN ELLISON
HWTS:

Part. Matter 10 Micrometers and Smllr Tons/Yr: 4e-05
Particulate Matter Tons/Yr: 4.17e-05
SOX - Oxides of Sulphur Tons/Yr: 2.08e-06
NOX - Oxides of Nitrogen Tons/Yr: 0.001004543
Carbon Monoxide Emissions Tons/Yr: 0.000989427
Reactive Organic Gases Tons/Yr: 5.31e-05
Total Organic Hydrocarbon Gases Tons/Yr: 6.1e-05
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4841
Air District Name: BA
Facility ID: 22185
Air Basin: SF
County Code: 7
Year: 2023
City,State,Zip: OAKLEY, CA 94561
Address: 5111 SELLERS AVE
Name: COMCAST OF CALIFORNIA IV INC
Part. Matter 10 Micrometers and Smllr Tons/Yr: 4.17e-005 Particulate Matter Tons/Yr: 4.17e-005
COMCAST OF CALIFORNIA IV INC (Continued) S112940880
TC8321160.2s Page 20
394
Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
CERS ID: 10449130
Cupa Number: 774655
Region: CONTRA COSTA
Program/Elements: HMBP: 1K-10K LBS
Program Status: CONTRA COSTA SITES
Billing Status: ACTIVE, BILLABLE
Facility ID: FA0034290
City: OAKLEY
Address: 5111 SELLERS AVE
Name: COMCAST CABLE
CONTRA COSTA SITES:

Additional Code 5: Not reported
Additional Code 4: Not reported
Additional Code 3: Not reported
Additional Code 2: Not reported
Additional Code 1: Not reported
Quantity Unit: G
Waste Quantity: 150
Quantity Tons: 0.6255
Meth Code: R01 - Recycler
RCRA Code: NA
Waste Code Description: 223 - Unspecified oil-containing waste TSDF Alt Name: Not reported
TSDF Alt EPA ID: CAL000161743
Trans Name: ALVISO INDEPENDENT OIL
TSDF EPA ID: CAL000161743
Trans 2 Name: Not reported
Trans 2 EPA ID: Not reported
Trans Name: CLEARWATER ENVIRONMENTAL
Trans EPA ID: CAR000007013
Manifest ID: 24062867
Receipt Date: 20041209
Creation Date: 2/17/2005 18:32:22
Shipment Date: 20041208
Gen EPA ID: CAC002582866
Year: 2004
Additional Information:

Tons: 0.6255
Disposal Method: R01 - Recycler
CA Waste Code: 223 - Unspecified oil-containing waste
TSD EPA ID: CAL000161743
Gepaid: CAC002582866
Year: 2004
Mailing Address: 5111 SELLERS AVE
Mailing Name: Not reported
Telephone: 9256251626
Contact: JOHN ELLISON
City,State,Zip: OAKLEY, CA 94561
Address 2: Not reported
Address: 5111 SELLERS AVE
COMCAST OF CALIFORNIA IV INC (Continued) S112940880
TC8321160.2s Page 21
395
Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Institutional Control Indicator: No
Environmental Control Indicator: No
Corrective Action Priority Ranking: No NCAPS ranking
Non-TSDFs Where RCRA CA has Been Imposed Universe: No
Subject to Corrective Action Universe: No
202 GPRA Corrective Action Baseline: No
2018 GPRA Renewals Baseline: Not on the Baseline
2018 GPRA Permit Baseline: Not on the Baseline
Sub-Part K Indicator: Not reported
Hazardous Secondary Material Indicator: N
Federal Facility Indicator: Not reported
Active Site State-Reg Handler: ---
Federal Universal Waste: No
Universal Waste Destination Facility: No
Universal Waste Indicator: No
Off-Site Waste Receipt: No
Underground Injection Control: No
Smelting Melting and Refining Furnace Exemption: No
Small Quantity On-Site Burner Exemption: No
Recycler Activity with Storage: No
Transfer Facility Activity: No
Transporter Activity: No
Mixed Waste Generator: No
Importer Activity: No
Short-Term Generator Activity: No
Operator Type: Not reported
Operator Name: Not reported
Owner Type: Not reported
Owner Name: Not reported
Mailing City,State,Zip: Not reported
Mailing Address: Not reported
State District: Not reported
State District Owner: Not reported
Active Site Indicator: Not reported
Accessibility: Not reported
Biennial Report Cycle: Not reported
Non-Notifier: Not reported
Federal Waste Generator Description: Not a generator, verified Land Type: Not reported
EPA Region: 09
Contact Title: Not reported
Contact Email: Not reported
Contact Fax: Not reported
Contact Telephone: Not reported
Contact City,State,Zip: Not reported
Contact Address: Not reported
Contact Name: Not reported
EPA ID: CAC003336394
Handler City,State,Zip: OAKLEY, CA 94561
Handler Address: 5111 Sellers Rd
Handler Name: Comcast
Date Form Received by Agency: 20250728
RCRA Listings:
696 ft.

0.132 mi.

Relative:

Higher
Actual:
37 ft.
1/8-1/4 OAKLEY, CA 94561 E MANIFEST
South 5111 SELLERS RD ECHO CAC003336394
4 COMCAST RCRA NonGen / NLR 1031775981
TC8321160.2s Page 22
396
Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Electronic Manifest Broker: No
Non Storage Recycler Activity: No
Current Record: No
Spent Lead Acid Battery Exporter: No
Spent Lead Acid Battery Importer: No
Recognized Trader Exporter: No
Recognized Trader Importer: No
Large Quantity Handler of Universal Waste: No
State District Owner: Not reported
Federal Waste Generator Description: Not a generator, verified Handler Name: COMCAST
Receive Date: 20250428
Historic Generators:

Owner/Operator Email: Not reported
Owner/Operator Fax: Not reported
Owner/Operator Telephone Ext: Not reported
Owner/Operator Telephone: 916-701-3462
Owner/Operator City,State,Zip: SACRAMENTO, CA 95834
Owner/Operator Address: 1242 NATIONAL DRIVE
Date Ended Current: Not reported
Date Became Current: Not reported
Legal Status: Other
Owner/Operator Name: CHRIS ORSOLINI
Owner/Operator Indicator: Operator
Owner/Operator Email: Not reported
Owner/Operator Fax: Not reported
Owner/Operator Telephone Ext: Not reported
Owner/Operator Telephone: 916-701-3462
Owner/Operator City,State,Zip: LIVERMORE, CA 94551
Owner/Operator Address: 3011 TRIAD PLACE
Date Ended Current: Not reported
Date Became Current: Not reported
Legal Status: Other
Owner/Operator Name: COMCAST OF CA
Owner/Operator Indicator: Owner
Handler - Owner Operator:

Sub-Part P Indicator: No
Manifest Broker: No
Recycler Activity Without Storage: No
Exporter of Spent Lead Acid Batteries: No
Importer of Spent Lead Acid Batteries: No
Recognized Trader-Exporter: No
Recognized Trader-Importer: No
Handler Date of Last Change: 20250807
Financial Assurance Required: Not reported
Significant Non-Complier With a Compliance Schedule Universe: No Addressed Significant Non-Complier Universe: No
Unaddressed Significant Non-Complier Universe: No
Significant Non-Complier Universe: No
Groundwater Controls Indicator: N/A
Human Exposure Controls Indicator: N/A
COMCAST (Continued) 1031775981
TC8321160.2s Page 23
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Generator Mail State: CA
Generator Mail Zip: 94561
Generator Mail City: OAKLEY
Generator Mail Street 2: Not reported
Generator Mail Street 1: 5111 SELLERS RD
Generator Mail Street Number: Not reported
Generator Location Zip: 94561
Generator Location State: CA
Generator Location City: OAKLEY
Generator Location Street 2: Not reported
Generator Location Street 1: 5111 SELLERS RD
Generator Location Street Number: Not reported
Generator Name: Comcast
Generator EPA ID: CAC003336394
Origin Type: Service
Submission Type: DataImage5Copy
Manifest Status: Signed
Received Date: 20250530
Shipped Date: 20250523
Last Updated Date: 20250606
Manifest Tracking Number: 026311840JJK
E MANIFEST:

City,State,Zip: OAKLEY, CA 94561
Address: 5111 Sellers Rd
Name: COMCAST
DFR URL:

Registry ID: 110072020206
Envid: 1031775981
ECHO:

Evaluations: No Evaluations Found
Evaluation Action Summary:

Violations: No Violations Found
Facility Has Received Notices of Violations:

NAICS Description: Wired Telecommunications Carriers
NAICS Code: 517111
List of NAICS Codes and Descriptions:

Electronic Manifest Broker: No
Non Storage Recycler Activity: No
Current Record: Yes
Spent Lead Acid Battery Exporter: No
Spent Lead Acid Battery Importer: No
Recognized Trader Exporter: No
Recognized Trader Importer: No
Large Quantity Handler of Universal Waste: No
State District Owner: Not reported
Federal Waste Generator Description: Not a generator, verified Handler Name: COMCAST
Receive Date: 20250728
COMCAST (Continued) 1031775981
TC8321160.2s Page 24
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Waste Density Unit of Measure Code: Not reported
Waste Density: Not reported
Waste Type Discrepancy Indicator: N
Quantity Discrepancy Indicator: N
Waste Residue Indicator: N
Management Method Description: STORAGE, BULKING AND/OR TRANSFER OFF SITE Management Method Code: H141
Non-Acute Waste Quantity, in Kilorgrams: 1040.1729337
Acute Waste Quantity, in Kilograms: 0
Waste Quantity, in Kilograms: 1040.17202
Non-Acute Waste Quantity, in Tons: 1.14679
Acute Waste Quantity, in Tons: 0
Waste Quantity, in Tons: 1.14679
Quantity Unit of Measure Description: Gallons
Quantity Unit of Measure Code: G
Waste Quantity: 275
Container Type Description: Metal drums, barrels, kegs
Container Type Code: DM
Number of Containers: 5
Non-Hazardous Waste Description: Not reported
U.S. DOT Description: Un1202, Waste Diesel Fuel, 3 , Iii, Rq U.S. DOT ID Number: UN1202
U.S. DOT Hazardous Indicator: Y
Waste Line Number: 1
Manifest Tracking Number: 026311840JJK
Waste Line:

Transporter Name: Universal Motor Oil Llc
Transporter EPA ID: CAR000372151
Transporter Line Number: 2
Manifest Tracking Number: 026311840JJK
Transporter Name: Res Environmental Services
Transporter EPA ID: CAR000185959
Transporter Line Number: 1
Manifest Tracking Number: 026311840JJK
Transporter:

Rejection Indicator: N
Manifest Residue Indicator: N
Designated Facility Contact Company Name: Not reported
Designated Facility Location State: CA
Designated Facility Location Zip: 90813
Designated Facility Location City: LONG BEACH
Designated Facility Location Street 2: Not reported
Designated Facility Location Street 1: W. 17TH STREET
Designated Facility Location Street Number: 1630
Designated Facility Mail State: CA
Designated Facility Mail Zip: 90813
Designated Facility Mail City: LONG BEACH
Designated Facility Mail Street 2: W. 17TH STREET
Designated Facility Mail Street 1: Not reported
Designated Facility Mail Street Number: 1630
Designated Facility Name: Crosby & Overton
Designated Facility EPA ID: CAD028409019
Generator Contact Company Name: Not reported
COMCAST (Continued) 1031775981
TC8321160.2s Page 25
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
State Waste Codes: CA-331
Quantity Non Haz Tons: 0
Quantity Non Haz Kg: 0
Quantity Haz Tons: 1.14679
Quantity Haz Kg: 1040.1729337
Federal Waste Codes: D001
EPA Waste Indicator: Y
Consent Number: Not reported
Waste Minimization Code Description: Not reported
Waste Minimization Code: Not reported
Source Code Description: Not reported
Source Code: Not reported
Form Code Description: Not reported
Form Code: Not reported
Waste Density Unit of Measure Description: Not reported COMCAST (Continued) 1031775981
Carbon Monoxide Emissions Tons/Yr: .002
Reactive Organic Gases Tons/Yr: .0125505
Total Organic Hydrocarbon Gases Tons/Yr: .015
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
Air Basin: SF
County Code: 7
Year: 2007
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
Part. Matter 10 Micrometers and Smllr Tons/Yr: 0
Particulate Matter Tons/Yr: 0
SOX - Oxides of Sulphur Tons/Yr: 0
NOX - Oxides of Nitrogen Tons/Yr: .014
Carbon Monoxide Emissions Tons/Yr: .007
Reactive Organic Gases Tons/Yr: .0117138
Total Organic Hydrocarbon Gases Tons/Yr: .014
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
Air Basin: SF
County Code: 7
Year: 2006
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
EMI:
872 ft.

0.165 mi.

Relative:

Lower
Actual:
30 ft.
1/8-1/4 OAKLEY, CA 94561 CERS
NE 5480 SELLERS AVE CONTRA COSTA SITES N/A
5 VERIZON WIRELESS EMI S109283049
TC8321160.2s Page 26
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
Air Basin: SF
County Code: 7
Year: 2010
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
Part. Matter 10 Micrometers and Smllr Tons/Yr: 0
Particulate Matter Tons/Yr: 0
SOX - Oxides of Sulphur Tons/Yr: 0
NOX - Oxides of Nitrogen Tons/Yr: 5.0000000000000001E-3 Carbon Monoxide Emissions Tons/Yr: 0.001
Reactive Organic Gases Tons/Yr: 4.1834999999999997E-3
Total Organic Hydrocarbon Gases Tons/Yr: 5.0000000000000001E-3 Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
Air Basin: SF
County Code: 7
Year: 2009
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
Part. Matter 10 Micrometers and Smllr Tons/Yr: 0
Particulate Matter Tons/Yr: 0
SOX - Oxides of Sulphur Tons/Yr: 0
NOX - Oxides of Nitrogen Tons/Yr: .014
Carbon Monoxide Emissions Tons/Yr: .002
Reactive Organic Gases Tons/Yr: .0125505
Total Organic Hydrocarbon Gases Tons/Yr: .015
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
Air Basin: SF
County Code: 7
Year: 2008
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
Part. Matter 10 Micrometers and Smllr Tons/Yr: 0
Particulate Matter Tons/Yr: 0
SOX - Oxides of Sulphur Tons/Yr: 0
NOX - Oxides of Nitrogen Tons/Yr: .014
VERIZON WIRELESS (Continued) S109283049
TC8321160.2s Page 27
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
Air Basin: SF
County Code: 7
Year: 2013
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
Part. Matter 10 Micrometers and Smllr Tons/Yr: 0
Particulate Matter Tons/Yr: 0
SOX - Oxides of Sulphur Tons/Yr: 0
NOX - Oxides of Nitrogen Tons/Yr: 0.004
Carbon Monoxide Emissions Tons/Yr: 0.001
Reactive Organic Gases Tons/Yr: 0.0033468
Total Organic Hydrocarbon Gases Tons/Yr: 0.004
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
Air Basin: SF
County Code: 7
Year: 2012
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
Part. Matter 10 Micrometers and Smllr Tons/Yr: 0
Particulate Matter Tons/Yr: 0
SOX - Oxides of Sulphur Tons/Yr: 0
NOX - Oxides of Nitrogen Tons/Yr: 0.004
Carbon Monoxide Emissions Tons/Yr: 0.001
Reactive Organic Gases Tons/Yr: 0.0033468
Total Organic Hydrocarbon Gases Tons/Yr: 0.004
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
Air Basin: SF
County Code: 7
Year: 2011
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
Part. Matter 10 Micrometers and Smllr Tons/Yr: 0
Particulate Matter Tons/Yr: 0
SOX - Oxides of Sulphur Tons/Yr: 0
NOX - Oxides of Nitrogen Tons/Yr: 5.0000000000000001E-3 Carbon Monoxide Emissions Tons/Yr: 0.001
Reactive Organic Gases Tons/Yr: 4.1834999999999997E-3
Total Organic Hydrocarbon Gases Tons/Yr: 5.0000000000000001E-3 VERIZON WIRELESS (Continued) S109283049
TC8321160.2s Page 28
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Air Basin: SF
County Code: 7
Year: 2016
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
Part. Matter 10 Micrometers and Smllr Tons/Yr: 0.000282705 Particulate Matter Tons/Yr: 0.000294484
SOX - Oxides of Sulphur Tons/Yr: 1.6639e-005
NOX - Oxides of Nitrogen Tons/Yr: 0.01533277
Carbon Monoxide Emissions Tons/Yr: 0.002321772
Reactive Organic Gases Tons/Yr: 0.01643228
Total Organic Hydrocarbon Gases Tons/Yr: 0.01650052
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
Air Basin: SF
County Code: 7
Year: 2015
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
Part. Matter 10 Micrometers and Smllr Tons/Yr: 0.000282705 Particulate Matter Tons/Yr: 0.000294484
SOX - Oxides of Sulphur Tons/Yr: 1.6639e-005
NOX - Oxides of Nitrogen Tons/Yr: 0.015332772
Carbon Monoxide Emissions Tons/Yr: 0.002321772
Reactive Organic Gases Tons/Yr: 0
Total Organic Hydrocarbon Gases Tons/Yr: 0.016500523
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
Air Basin: SF
County Code: 7
Year: 2014
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
Part. Matter 10 Micrometers and Smllr Tons/Yr: 0
Particulate Matter Tons/Yr: 0
SOX - Oxides of Sulphur Tons/Yr: 0
NOX - Oxides of Nitrogen Tons/Yr: 0.004
Carbon Monoxide Emissions Tons/Yr: 0.001
Reactive Organic Gases Tons/Yr: 0.0033468
Total Organic Hydrocarbon Gases Tons/Yr: 0.004
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
VERIZON WIRELESS (Continued) S109283049
TC8321160.2s Page 29
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
Part. Matter 10 Micrometers and Smllr Tons/Yr: 0.000131277 Particulate Matter Tons/Yr: 0.000136747
SOX - Oxides of Sulphur Tons/Yr: 7.726e-006
NOX - Oxides of Nitrogen Tons/Yr: 0.007119929
Carbon Monoxide Emissions Tons/Yr: 0.001078139
Reactive Organic Gases Tons/Yr: 0.006731232158
Total Organic Hydrocarbon Gases Tons/Yr: 0.007662188
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
Air Basin: SF
County Code: 7
Year: 2018
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
Part. Matter 10 Micrometers and Smllr Tons/Yr: 0.000127494 Particulate Matter Tons/Yr: 0.000132807
SOX - Oxides of Sulphur Tons/Yr: 7.504e-006
NOX - Oxides of Nitrogen Tons/Yr: 0.006914779
Carbon Monoxide Emissions Tons/Yr: 0.001047074
Reactive Organic Gases Tons/Yr: 0.006537280442
Total Organic Hydrocarbon Gases Tons/Yr: 0.007441412
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
Air Basin: SF
County Code: 7
Year: 2017
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
Part. Matter 10 Micrometers and Smllr Tons/Yr: 0.000127494 Particulate Matter Tons/Yr: 0.000132807
SOX - Oxides of Sulphur Tons/Yr: 7.504e-006
NOX - Oxides of Nitrogen Tons/Yr: 0.006914779
Carbon Monoxide Emissions Tons/Yr: 0.001047074
Reactive Organic Gases Tons/Yr: 0.006537280442
Total Organic Hydrocarbon Gases Tons/Yr: 0.007441412
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
VERIZON WIRELESS (Continued) S109283049
TC8321160.2s Page 30
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Part. Matter 10 Micrometers and Smllr Tons/Yr: 0.000131868 Particulate Matter Tons/Yr: 0.000133038
SOX - Oxides of Sulphur Tons/Yr: 7.83e-006
NOX - Oxides of Nitrogen Tons/Yr: 0.007215423
Carbon Monoxide Emissions Tons/Yr: 0.001092599
Reactive Organic Gases Tons/Yr: 0.00679329994
Total Organic Hydrocarbon Gases Tons/Yr: 0.00773284
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
Air Basin: SF
County Code: 7
Year: 2021
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
Part. Matter 10 Micrometers and Smllr Tons/Yr: 0.000142371 Particulate Matter Tons/Yr: 0.000148303
SOX - Oxides of Sulphur Tons/Yr: 8.379e-006
NOX - Oxides of Nitrogen Tons/Yr: 0.007721615
Carbon Monoxide Emissions Tons/Yr: 0.001169249
Reactive Organic Gases Tons/Yr: 0.0073000688145
Total Organic Hydrocarbon Gases Tons/Yr: 0.008309697
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
Air Basin: SF
County Code: 7
Year: 2020
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
Part. Matter 10 Micrometers and Smllr Tons/Yr: 0.000131277 Particulate Matter Tons/Yr: 0.000136747
SOX - Oxides of Sulphur Tons/Yr: 7.726e-006
NOX - Oxides of Nitrogen Tons/Yr: 0.007119929
Carbon Monoxide Emissions Tons/Yr: 0.001078139
Reactive Organic Gases Tons/Yr: 0.006731232158
Total Organic Hydrocarbon Gases Tons/Yr: 0.007662188
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
Air Basin: SF
County Code: 7
Year: 2019
VERIZON WIRELESS (Continued) S109283049
TC8321160.2s Page 31
405
Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
CERS:

CERS ID: 10144569
Cupa Number: 774070
Region: CONTRA COSTA
Program/Elements: HMBP: 1K-10K LBS
Program Status: CONTRA COSTA SITES
Billing Status: ACTIVE, BILLABLE
Facility ID: FA0030849
City: OAKLEY
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS OAKLEY EAST
CONTRA COSTA SITES:

Part. Matter 10 Micrometers and Smllr Tons/Yr: 0.000126557 Particulate Matter Tons/Yr: 0.00013183
SOX - Oxides of Sulphur Tons/Yr: 8.04e-06
NOX - Oxides of Nitrogen Tons/Yr: 0.007206926
Carbon Monoxide Emissions Tons/Yr: 0.001092309
Reactive Organic Gases Tons/Yr: 0.007704663
Total Organic Hydrocarbon Gases Tons/Yr: 0.007735424
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
Air Basin: SF
County Code: 7
Year: 2023
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
Part. Matter 10 Micrometers and Smllr Tons/Yr: 0.000132 Particulate Matter Tons/Yr: 0.000132
SOX - Oxides of Sulphur Tons/Yr: 8.04e-006
NOX - Oxides of Nitrogen Tons/Yr: 0.00721
Carbon Monoxide Emissions Tons/Yr: 0.00109
Reactive Organic Gases Tons/Yr: 0.0077
Total Organic Hydrocarbon Gases Tons/Yr: 0.0077
Consolidated Emission Reporting Rule: Not reported
Community Health Air Pollution Info System: Not reported Air District Name: BAY AREA AQMD
SIC Code: 4812
Air District Name: BA
Facility ID: 16977
Air Basin: SF
County Code: 7
Year: 2022
City,State,Zip: OAKLEY, CA 94561
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS
VERIZON WIRELESS (Continued) S109283049
TC8321160.2s Page 32
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Address: 5480 SELLERS AVE
Name: VERIZON WIRELESS OAKLEY EAST
Affiliation Phone: ,
Affiliation Zip: Not reported
Affiliation Country: Not reported
Affiliation State: CA
Affiliation City: FOLSOM
Affiliation Address: 255 PARKSHORE DRIVE
Entity Title: OPERATOR
Entity Name: VERIZON WIRELESS
Affiliation Type Desc: Operator
Affiliation Phone: ,
Affiliation Zip: Not reported
Affiliation Country: Not reported
Affiliation State: Not reported
Affiliation City: Not reported
Affiliation Address: Not reported
Entity Title: Network Operations Control Center
Entity Name: NOCC
Affiliation Type Desc: Environmental Contact
Affiliation Phone: ,
Affiliation Zip: Not reported
Affiliation Country: Not reported
Affiliation State: CA
Affiliation City: FOLSOM
Affiliation Address: 255 PARKSHORE DRIVE
Entity Title: NOCC
Entity Name: NETWORK OPR CONTRL CTR
Affiliation Type Desc: Environmental Contact
Affiliation Phone: ,
Affiliation Zip: Not reported
Affiliation Country: Not reported
Affiliation State: CA
Affiliation City: FOLSOM
Affiliation Address: 255 PARKSHORE DRIVE
Entity Title: ENVIRONMENTAL CONTACT
Entity Name: ENVIR COMPLIANCE
Affiliation Type Desc: Environmental Contact
Affiliation Phone: ,
Affiliation Zip: Not reported
Affiliation Country: Not reported
Affiliation State: CA
Affiliation City: FOLSOM
Affiliation Address: 255 PARKSHORE DRIVE
Entity Title: OWNER
Entity Name: VERIZON WIRELESS
Affiliation Type Desc: Facility Owner
Affiliation:

CERS Description: US EPA Air Emission Inventory System (EIS) CERS ID: 110054321667
Site ID: 502840
VERIZON WIRELESS (Continued) S109283049
TC8321160.2s Page 33
407
Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Affiliation Address: Not reported
Entity Title: Not reported
Entity Name: Verizon Wireless
Affiliation Type Desc: Operator
Affiliation:

Longitude: -121.675600
Latitude: 37.975490
Ref Point Type Desc: Center of a facility or station.,
Coord Name: Not reported
Program ID: 10144569
Env Int Type Code: HMBP
Facility Name: Verizon Wireless Oakley East
Site ID: 406274
Coordinates:

Eval Source: CERS,
Eval Program: HMRRP
Eval Division: Contra Costa County Health Services Department Eval Notes: Not reported
Eval Type: Routine done by local agency
Violations Found: No
Eval Date: 04-11-2019
Eval General Type: Compliance Evaluation Inspection
Eval Source: CERS,
Eval Program: HMRRP
Eval Division: Contra Costa County Health Services Department Eval Notes: Not reported
Eval Type: Routine done by local agency
Violations Found: No
Eval Date: 02-09-2016
Eval General Type: Compliance Evaluation Inspection
Eval Source: CERS,
Eval Program: HMRRP
Eval Division: Contra Costa County Health Services Department Eval Notes: Not reported
Eval Type: Routine done by local agency
Violations Found: No
Eval Date: 07-22-2021
Eval General Type: Compliance Evaluation Inspection
Eval Source: CERS,
Eval Program: HMRRP
Eval Division: Contra Costa County Health Services Department Eval Notes: Not reported
Eval Type: Routine done by local agency
Violations Found: No
Eval Date: 10-05-2023
Eval General Type: Compliance Evaluation Inspection
Evaluation:

CERS Description: Chemical Storage Facilities
CERS ID: 10144569
Site ID: 406274
City,State,Zip: OAKLEY, CA 94561
VERIZON WIRELESS (Continued) S109283049
TC8321160.2s Page 34
408
Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Affiliation Type Desc: Facility Mailing Address
Affiliation Phone: ,
Affiliation Zip: 95630
Affiliation Country: Not reported
Affiliation State: CA
Affiliation City: Folsom
Affiliation Address: 295 Parkshore Drive
Entity Title: Not reported
Entity Name: Environmental Compliance
Affiliation Type Desc: Environmental Contact
Affiliation Phone: ,
Affiliation Zip: Not reported
Affiliation Country: Not reported
Affiliation State: Not reported
Affiliation City: Not reported
Affiliation Address: Not reported
Entity Title: Not reported
Entity Name: Steve Skanderson
Affiliation Type Desc: Document Preparer
Affiliation Phone: ,
Affiliation Zip: Not reported
Affiliation Country: Not reported
Affiliation State: Not reported
Affiliation City: Not reported
Affiliation Address: Not reported
Entity Title: Not reported
Entity Name: Verizon Wireless [Northern California]
Affiliation Type Desc: Parent Corporation
Affiliation Phone: (866) 694-2415,
Affiliation Zip: 95630
Affiliation Country: United States
Affiliation State: CA
Affiliation City: Folsom
Affiliation Address: 295 Parkshore Drive
Entity Title: Not reported
Entity Name: Verizon Wireless
Affiliation Type Desc: Legal Owner
Affiliation Phone: (925) 655-3200,
Affiliation Zip: 94553
Affiliation Country: Not reported
Affiliation State: CA
Affiliation City: Martinez
Affiliation Address: 4585 Pacheco BlvdSuite 100
Entity Title: Not reported
Entity Name: Contra Costa County Health Services Department Affiliation Type Desc: CUPA District
Affiliation Phone: (866) 694-2415,
Affiliation Zip: Not reported
Affiliation Country: Not reported
Affiliation State: Not reported
Affiliation City: Not reported
VERIZON WIRELESS (Continued) S109283049
TC8321160.2s Page 35
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Affiliation Phone: ,
Affiliation Zip: Not reported
Affiliation Country: Not reported
Affiliation State: Not reported
Affiliation City: Not reported
Affiliation Address: Not reported
Entity Title: environmental compliance mgr
Entity Name: armand delgado
Affiliation Type Desc: Identification Signer
Affiliation Phone: ,
Affiliation Zip: 95630
Affiliation Country: Not reported
Affiliation State: CA
Affiliation City: Folsom
Affiliation Address: 295 Parkshore Drive
Entity Title: Not reported
Entity Name: Mailing Address
VERIZON WIRELESS (Continued) S109283049
CERS ID: 10004740
Cupa Number: 707552
Region: CONTRA COSTA
Program/Elements: HMBP GENERAL
Program Status: CONTRA COSTA SITES
Billing Status: INACTIVE, NON-BILLABLE
Facility ID: FA0030956
City: KNIGHTSEN
Address: SELLERS & DELTA RD
Name: QUINTANA PETROLEUM CORP
CONTRA COSTA SITES:
1230 ft. Site 1 of 2 in cluster A

0.233 mi.

Relative:

Higher
Actual:
36 ft.
1/8-1/4 KNIGHTSEN, CA 94548

SSE SELLERS & DELTA RD N/A
A6 QUINTANA PETROLEUM CORP CONTRA COSTA SITES S102261021 NPL: NO
Acres: 76
Site Type Detailed: School
Site Type: School Investigation
Site Code: 204168
Status Date: 12/30/2009
Status: No Further Action
Facility ID: 70000141
City,State,Zip: BRENTWOOD, CA 94561
Address: DELTA AND SELLERS
Name: 76-ACRE FOURTH HIGH SCHOOL
ENVIROSTOR:
1230 ft. Site 2 of 2 in cluster A

0.233 mi.

Relative:

Higher
Actual:
36 ft.
1/8-1/4 BRENTWOOD, CA 94561

SSE DELTA AND SELLERS SCH N/A
A7 76-ACRE FOURTH HIGH SCHOOL ENVIROSTOR S107735777
TC8321160.2s Page 36
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 11/28/2005
Completed Document Type: Environmental Oversight Agreement Application Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
chemical sampling.

Comments: DTSC approved the PEA Addendum Tech Memo for additional residual ag Completed Date: 09/25/2008
Completed Document Type: Preliminary Endangerment Assessment Workplan Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Completed Info:

Alias Type: Envirostor ID Number
Alias Name: 70000141
Alias Type: Project Code (Site Code)
Alias Name: 204168
Alias Type: APN
Alias Name: 018310013
Alias Type: APN
Alias Name: 018310012
Alias Type: APN
Alias Name: 018310011
Alias Type: APN
Alias Name: 018-310-013
Alias Type: APN
Alias Name: 018-310-012
Alias Type: APN
Alias Name: 018-310-011
Alias Type: Alternate Name
Alias Name: 58 ACRE FOURTH HIGH SCHOOL SITE
Potential Description: SOIL, SV
Contaminants found
30593-NO 30013-NO 30015-NO 30006-NO 30007-NO 30008-NO 30009-NO No Confirmed COC: 30001-NO 30003-NO 30004-NO 30025-NO 30272-NO 30330-NO 30550-NO Lead Methane TPH-gas Ethylbenzene Hydrogen sulfide Toluene Xylenes Potential COC: Arsenic Benzene Chlordane DDD DDE DDT Dioxin (as 2,3,7,8-TCDD TEQ

RESIDENTIAL AREA
Past Use: AGRICULTURAL - ORCHARD, AGRICULTURAL - ROW CROPS, OIL FIELD, Not reported
APN: 018-310-011, 018-310-012, 018-310-013, 018310011, 018310012, 018310013 Longitude: -121.6799
Latitude: 37.96699
Funding: School District
Site Mgmt Req: NONE SPECIFIED
Restricted Use: NO
Special Program: Not reported
Senate: 03
Assembly: 11
Division Branch: Santa Susana Field Laboratory Branch
Supervisor: * Mark Malinowski
Program Manager: Mellan Songco
Lead Agency: SMBRP
Regulatory Agencies: SMBRP
76-ACRE FOURTH HIGH SCHOOL (Continued) S107735777
TC8321160.2s Page 37
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Comments: Not reported
Completed Date: 12/13/2005
Completed Document Type: Environmental Oversight Agreement Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
with the SSI.

Comments: DTSC sent a CRU to the accounting unit to summarize costs associated Completed Date: 01/28/2010
Completed Document Type: Cost Recovery Closeout Memo (Confidential) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: PRoject Manager changed from Mike Hall to Mellan Songco Completed Date: 09/10/2009
Completed Document Type: Correspondence
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
additional acreage, project delays, and site complexity with cover letter. Cost estimate revised based on redo of PEA, Comments: Updated EOA cost estimate worksheet (Exhibit D) mailed to district Completed Date: 10/01/2008
Completed Document Type: Correspondence
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: DTSC Approved the SSI Workplan
Completed Date: 05/26/2009
Completed Document Type: Supplemental Site Investigation Workplan Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: DTSC approved the SSI Tech Memo
Completed Date: 12/21/2009
Completed Document Type: Supplemental Site Investigation Tech Memo Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
required.

Comments: DTSC approved the SSI Report that no further investigation is Completed Date: 12/30/2009
Completed Document Type: Supplemental Site Investigation Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Approved PEA Report with further action determination.

Completed Date: 03/26/2009
Completed Document Type: Preliminary Endangerment Assessment Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
background only
Comments: No determination required. Review of document for PEA scoping Completed Date: 01/17/2006
Completed Document Type: Other Report
76-ACRE FOURTH HIGH SCHOOL (Continued) S107735777
TC8321160.2s Page 38
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Confirmed COC: 30001-NO, 30003-NO, 30004-NO, 30025-NO, 30272-NO, 30330-NO, sulfide, Toluene, Xylenes
2,3,7,8-TCDD TEQ, Lead, Methane, TPH-gas, Ethylbenzene, Hydrogen Potential COC: Arsenic, Arsenic, Benzene, Chlordane, DDD, DDE, DDT, Dioxin (as

RESIDENTIAL AREA
Past Use: AGRICULTURAL - ORCHARD, AGRICULTURAL - ROW CROPS, OIL FIELD, Not reported
APN: 018-310-011, 018-310-012, 018-310-013, 018310011, 018310012, 018310013 Longitude: -121.6799
Latitude: 37.96699
Funding: School District
Restricted Use: NO
Status Date: 12/30/2009
Status: No Further Action
Special Program Status: Not reported
Senate: 03
Assembly: 11
Site Code: 204168
Division Branch: Santa Susana Field Laboratory Branch
Supervisor: * Mark Malinowski
Project Manager: Mellan Songco
Lead Agency Description: DTSC - Site Cleanup Program
Lead Agency: SMBRP
Cleanup Oversight Agencies: SMBRP
National Priorities List: NO
Acres: 76
Site Mgmt. Req.: NONE SPECIFIED
Site Type Detail: School
Site Type: School Investigation
Facility ID: 70000141
City,State,Zip: BRENTWOOD, CA 94561
Address: DELTA AND SELLERS
Name: 76-ACRE FOURTH HIGH SCHOOL
SCH:

Schedule Revised Date: Not reported
Schedule Due Date: Not reported
Schedule Document Type: Not reported
Schedule Sub Area Name: Not reported
Schedule Area Name: Not reported
Future Due Date: Not reported
Future Document Type: Not reported
Future Sub Area Name: Not reported
Future Area Name: Not reported
Comments: DTSC approved the PEA Workplan as Final.

Completed Date: 06/27/2006
Completed Document Type: Preliminary Endangerment Assessment Workplan Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 08/14/2006
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
76-ACRE FOURTH HIGH SCHOOL (Continued) S107735777
TC8321160.2s Page 39
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
required.

Comments: DTSC approved the SSI Report that no further investigation is Completed Date: 12/30/2009
Completed Document Type: Supplemental Site Investigation Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Approved PEA Report with further action determination.

Completed Date: 03/26/2009
Completed Document Type: Preliminary Endangerment Assessment Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
background only
Comments: No determination required. Review of document for PEA scoping Completed Date: 01/17/2006
Completed Document Type: Other Report
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 11/28/2005
Completed Document Type: Environmental Oversight Agreement Application Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
chemical sampling.

Comments: DTSC approved the PEA Addendum Tech Memo for additional residual ag Completed Date: 09/25/2008
Completed Document Type: Preliminary Endangerment Assessment Workplan Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Completed Info:

Alias Type: Envirostor ID Number
Alias Name: 70000141
Alias Type: Project Code (Site Code)
Alias Name: 204168
Alias Type: APN
Alias Name: 018310013
Alias Type: APN
Alias Name: 018310012
Alias Type: APN
Alias Name: 018310011
Alias Type: APN
Alias Name: 018-310-013
Alias Type: APN
Alias Name: 018-310-012
Alias Type: APN
Alias Name: 018-310-011
Alias Type: Alternate Name
Alias Name: 58 ACRE FOURTH HIGH SCHOOL SITE
Potential Description: SOIL, SV
30009-NO, No Contaminants found
30550-NO, 30593-NO, 30013-NO, 30015-NO, 30006-NO, 30007-NO, 30008-NO, 76-ACRE FOURTH HIGH SCHOOL (Continued) S107735777
TC8321160.2s Page 40
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Schedule Due Date: Not reported
Schedule Document Type: Not reported
Schedule Sub Area Name: Not reported
Schedule Area Name: Not reported
Future Due Date: Not reported
Future Document Type: Not reported
Future Sub Area Name: Not reported
Future Area Name: Not reported
Comments: DTSC approved the PEA Workplan as Final.

Completed Date: 06/27/2006
Completed Document Type: Preliminary Endangerment Assessment Workplan Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 08/14/2006
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 12/13/2005
Completed Document Type: Environmental Oversight Agreement Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
with the SSI.

Comments: DTSC sent a CRU to the accounting unit to summarize costs associated Completed Date: 01/28/2010
Completed Document Type: Cost Recovery Closeout Memo (Confidential) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: PRoject Manager changed from Mike Hall to Mellan Songco Completed Date: 09/10/2009
Completed Document Type: Correspondence
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
additional acreage, project delays, and site complexity with cover letter. Cost estimate revised based on redo of PEA, Comments: Updated EOA cost estimate worksheet (Exhibit D) mailed to district Completed Date: 10/01/2008
Completed Document Type: Correspondence
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: DTSC Approved the SSI Workplan
Completed Date: 05/26/2009
Completed Document Type: Supplemental Site Investigation Workplan Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: DTSC approved the SSI Tech Memo
Completed Date: 12/21/2009
Completed Document Type: Supplemental Site Investigation Tech Memo 76-ACRE FOURTH HIGH SCHOOL (Continued) S107735777
TC8321160.2s Page 41
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Schedule Revised Date: Not reported
76-ACRE FOURTH HIGH SCHOOL (Continued) S107735777
Alias Name: SLT5S1103150
Alias Type: EPA (FRS #)
Alias Name: 110030985682
Alias Type: EPA Identification Number
Alias Name: CAD983613910
Alias Type: APN
Alias Name: 033090028
Alias Type: APN
Alias Name: 033-090-028-3
Alias Type: Alternate Name
Alias Name: OAKLEY BATTERY YARD
Alias Type: Alternate Name
Alias Name: COOKS BATTERY SITE
Alias Type: Alternate Name
Alias Name: COOK BATTERY RECLAMATION
Alias Type: Alternate Name
Alias Name: BATTERY RECLAMATION BUSINESS
Potential Description: SOIL
Confirmed COC: Lead
Potential COC : Lead
Past Use: BATTERY RECLAMATION
APN: 033-090-028-3, 033090028
Longitude: -121.6921
Latitude: 37.97391
Funding: Orphan Funds
Restricted Use: NO
Status Date: 06/28/2006
Status: Certified / Operation & Maintenance
Special Program Status: SRA Orphan
Senate: 03
Assembly: 11
Site Mgmt. Req.: NONE SPECIFIED
Site Code: 200072
Division Branch: Cleanup Sacramento
Supervisor: Ruth Cayabyab
Project Manager: Chinh Vu
Lead Agency Description: DTSC - Site Cleanup Program
Cleanup Oversight Agencies: SMBRP
National Priorities List: NO
Acres: 1.5
Site Type Detail: State Response or NPL
Site Type: State Response
Facility ID: 07360035
City,State,Zip: OAKLEY, CA 94561
Address: 139 HILL AVENUE
Name: COOK BATTERY (OAKLEY BATTERY)
RESPONSE:

CERS

HIST CORTESE
Cortese
3624 ft. Site 1 of 2 in cluster B LIENS

0.686 mi. HIST Cal-Sites
Relative:

Higher
Actual:
42 ft.
1/2-1 OAKLEY, CA 94561 CPS-SLIC
West 139 HILL AVENUE ENVIROSTOR N/A
B8 COOK BATTERY (OAKLEY BATTERY) S101272690 RESPONSE
TC8321160.2s Page 42
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Comments: Completed the annual site inspection on September 19, 2024.

Completed Date: 09/30/2024
Completed Document Type: Land Use Restriction - Site Inspection/Visit Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: 24-01-08 - RFF completed
Completed Date: 01/08/2024
Completed Document Type: State/Federal Funding Site Contract Fiscal Approval (RFF) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
approved by SERU Chief.

Comments: Pre-HARP form reviewed and signed by HSP Staff IH and signed and Completed Date: 06/06/2022
Completed Document Type: Pre-HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: PM task completed for FY24/25
Completed Date: 06/30/2025
Completed Document Type: Project Management (Confidential) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: PM duties complete for FY 23/24.

Completed Date: 06/30/2024
Completed Document Type: Project Management (Confidential) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Project Management for FY22/23 is complete.

Completed Date: 06/30/2023
Completed Document Type: Project Management (Confidential) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Site visit has been conducted on 9/16/2022
Completed Date: 09/16/2022
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Site Visit and Report have been completed.

Completed Date: 08/15/2022
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Completed Info:

Alias Type: Envirostor ID Number
Alias Name: 07360035
Alias Type: Project Code (Site Code)
Alias Name: 200072
Alias Type: PCode
Alias Name: P23001
Alias Type: GeoTracker Global ID
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
TC8321160.2s Page 43
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Completed Document Type: Community Update (Fact Sheets) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 12/18/2025
Completed Document Type: Post HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Signed pre-HARP uploaded
Completed Date: 09/30/2025
Completed Document Type: Pre-HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Site inspection conducted on October 13, 2025 with contractor ERRG Completed Date: 10/31/2025
Completed Document Type: Land Use Restriction - Site Inspection/Visit Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Sent PM change notification to contractor and internally within DTSC.

Completed Date: 08/20/2024
Completed Document Type: Correspondence
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Uploaded signed Pre-HARP
Completed Date: 09/18/2024
Completed Document Type: Pre-HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: 5/24/2024 emails for DTSC PM change notification Completed Date: 05/24/2024
Completed Document Type: Correspondence
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: 2023-12-04 WO A-4 Executed
Completed Date: 12/04/2023
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 09/25/2024
Completed Document Type: Post HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: 24-04-19 - A-5 executed
Completed Date: 04/19/2024
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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and cracks sealed.

Comments: Cap maintenances were performed as planned. Vegetation was removed Completed Date: 11/26/2024
Completed Document Type: Operation and Maintenance Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
completed on 10/20/17.
clearing, tree removal, fence repair, cap repair began on 10/9/17 and Comments: Operation and maintenance activities consisting of vegetation Completed Date: 10/20/2017
Completed Document Type: Fieldwork
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
asphalt sealing, and fence repairs at the Cook Battery site. maintenance activities to be performed, such as vegetation clearance, protecting onsite personnel from hazards associated with the cap Comments: The Health and Safety Plan defines the protocols necessary for Completed Date: 08/29/2017
Completed Document Type: Health & Safety Plan
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 08/29/2023
Completed Document Type: Five-Year Review Reports
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
asphalt repair at the site.
activities which included vegetation removal, fence repair, and Comments: In November 2017, DTSC contractor ERRG completed cap maintenance Completed Date: 01/03/2018
Completed Document Type: Operation and Maintenance Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Notice published 7/1/2011
Completed Date: 07/01/2011
Completed Document Type: Public Notice
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
property.
resurfacing the asphalt cap and removing trees from the Cook Battery of human health and the environment. This review recommends evaluates the approved remedy and ensures that it remains protective Comments: DTSC prepared the 2016 Five Year Review. The Five Year Review Completed Date: 06/30/2016
Completed Document Type: Five-Year Review Reports
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
and announces a community meeting on July 25.

Comments: Fact sheet provides an update of the current activities at the site Completed Date: 07/01/1991
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Deed Notice regarding the contamination.

Comments: Site certified. Contaminated soils capped in place. A lien acts as a Completed Date: 06/14/2006
Completed Document Type: Certification
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
groundwater. High levels of lead detected in soil and groundwater. contamination. County and DHS (predecessor to DTSC) test soil and Comments: Site Discovery. County Health Services first notified of potential Completed Date: 12/08/1980
Completed Document Type: * Discovery
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
No. not used).

Comments: Issued I&SE Determination due to high levels of lead in soil (Docket Completed Date: 12/15/1988
Completed Document Type: Imminent and/or Subst. Endangerment Determination Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
and remediation of the site due to high levels of lead in soil.

Comments: Issued Remedial Action Order HSA 88/89-031 requiring investigation Completed Date: 05/01/1989
Completed Document Type: Unilateral Order (I/SE, RAO, CAO, EPA AO) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
non-compliance with the Remedial Action Order issued.

Comments: Amended RAO to add additional respondent. Final Determination of Completed Date: 09/30/1989
Completed Document Type: Final Determination of Non-Compliance Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
John Thomas as a responsible party.

Comments: Amendment to Remedial Action Order, Docket No. HSA 88/89-031, to add Completed Date: 09/08/1989
Completed Document Type: Amendment - Order/Agreement
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
approved.
encapsulation of lead contaminated soil. Negative Declaration Comments: Approved RAW for onsite neutralization, consolidation and Completed Date: 08/16/1995
Completed Document Type: CEQA - Initial Study/ Neg. Declaration Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Final Cap Maintenance report has been received.

Completed Date: 12/08/2022
Completed Document Type: Operation and Maintenance Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Completed Date: 09/15/2022
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: The Field Order authorizes ERRG to use the $1,000 contingency.

Completed Date: 11/23/2020
Completed Document Type: State/Federal Funded Site Field Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Signed WO# 1-526-1.6-200072 sent to contractor on September 3, 2024 Completed Date: 09/03/2024
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
types or activities specified on the Multi Project Code list. unspecified activities that are not associated with any document response, public record act compliance and coordination, and other management inquiry response, project history research, public inquiry weekly/periodic update, project tracking, management briefing, EnviroStor update, Terradex Alert response and coordination, project management tasks for the subject project site such as Comments: From July 1, 2020 through June 30 2021, DTSC performed various Completed Date: 06/30/2021
Completed Document Type: Project Management (Confidential) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
funds to complete asphalt cap maintenance tasks.

Comments: The Work Order Number 003 for Contract No. 18-T4526 A-2 adds new Completed Date: 12/21/2020
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
on asphalt cap, crack repair, and reporting.
tasks at Cook Battery. Additional tasks include vegetation clearing Comments: The RFF 20-0171 requests funding for contractor to perform additional Completed Date: 10/08/2020
Completed Document Type: State/Federal Funding Site Contract Fiscal Approval (RFF) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
the southeast corner the fence was damaged.

Comments: the cap is in good condition; however, weeds were overgrown and in Completed Date: 04/30/2008
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 03/24/2005
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Comments: The overgrown weeds need to be trimmed and the debris/trash removed.

Completed Date: 05/27/2011
Completed Document Type: Five-Year Review Reports
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 03/29/2006
Completed Document Type: Other Report
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
health and the environment.

Comments: The report noted that the final remedy is still protective of public Completed Date: 06/14/2006
Completed Document Type: Five-Year Review Reports
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Cap Inspection Report signed off 6/22/05.

Completed Date: 06/22/2005
Completed Document Type: Other Report
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
maintenance.

Comments: Abandoned all six remaining monitoring wells and performed site Completed Date: 09/30/2003
Completed Document Type: Well Decommissioning Report
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Report documenting groundwater monitoring and site/cap maintenance.

Completed Date: 05/09/2002
Completed Document Type: Operation and Maintenance Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: The document has been fully executed.

Completed Date: 07/21/2022
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: End of the FY. Switching to FY22/23 activity.

Completed Date: 06/28/2022
Completed Document Type: Project Management (Confidential) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Funding Request Approved.

Completed Date: 03/18/2022
Completed Document Type: State/Federal Funding Site Contract Fiscal Approval (RFF) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: The Work Order is fully approved and has been executed.

COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Completed Date: 04/10/2009
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
DTSC constructor.

Fence repair and weed removal are scheduled to begin in June 2009 by were overgrown and in the southeast corner the fence was damaged. signs of significant cracking. However, it was observed that weeds Comments: The asphalt surface was observed to be in good condition, with no Completed Date: 06/01/2009
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
debris removed.
undisturbed. However, the overgrown weeds need to be trimmed and the Impacted soil remains under the asphalt surface, which remains remedies remain protective of human health and the environment.

Comments: Upon observing the current site conditions, DTSC concludes that the Completed Date: 07/08/2010
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
performed in October 2020.
cap area and (b) repair of cracks on the asphalt cap surface vegetation removal along the perimeter fence and within the asphalt Comments: The Cap Maintenance Summary Report documents (a) completion of Completed Date: 01/14/2021
Completed Document Type: Operation and Maintenance Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
fence as required by the LUC.

Comments: Completion comment - The report documents the repair to the cap and Completed Date: 09/24/2009
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Not reported
Contractor used 3 people and 1 Bin to contain the cuttings and debris.

Comments: Work completed on June 18th, fence repaired and vegetation removed.

Completed Date: 06/18/2009
Completed Document Type: Fieldwork
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Responses to public comments on Draft Removal Action Workplan Completed Date: 05/31/1995
Completed Document Type: Other Report
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
health threat and should include a DTSC contact number.

A sign should be posted that states that the Site poses a public COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 03/22/2006
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 03/24/2004
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
to limit vegetation through repaired cracks.
repair. In addition, an herbicide was included in the scope of work Sealer, previously used at the site, was chosen for this year crack vegetation growth. Therefore, the Latexite Airport Grade Asphalt benefit with regard to long term crack sealing and prevention of Comments: The Caltran spec sealer used in the 2023 crack repair did not provide Completed Date: 10/11/2024
Completed Document Type: Fieldwork
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
environment and human health. Recommend weed abatement.

Comments: Cap in good condition and still provides protectiveness to Completed Date: 04/29/2014
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Cap in good condition; still protective to surrounding environment Completed Date: 06/12/2013
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
property.
resurfacing the asphalt cap and removing trees from the Cook Battery of human health and the environment. This review recommends evaluates the approved remedy and ensures that it remains protective Comments: DTSC prepared the 2016 Five Year Review. The Five Year Review Completed Date: 06/05/2012
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 06/30/2011
Completed Document Type: Correspondence
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Work order for the maintenance and repair of the Cap and Fence COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Completed Date: 07/15/2016
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: The HARP covers the period from 1/1/18 through 12/31/18.

Completed Date: 01/08/2018
Completed Document Type: Pre-HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
15-T4109 and Tasks 4, 5, 6, and 7 of Contract 15-T4109 A2. repair activities as described in Tasks 1, 2, and 3 of Contract Comments: DTSC issued the Work Order 001 to ERRG for vegetation removal and cap Completed Date: 06/13/2017
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
expiration to 3/31/18, and increase. All other terms remain the same. the budget to a total maximum of $110,000.00, and extends contract Comments: Contract 15-T4109 Amendment 2 specifies additional tasks, increase Completed Date: 06/06/2017
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: The HARP is effective from 1/13/2016 through 1/12/2017.

Completed Date: 01/07/2016
Completed Document Type: Pre-HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
used).

Comments: Order to fence and post site issued to John Thomas (Docket No. not Completed Date: 10/21/1988
Completed Document Type: Fence & Post Order
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Avenue) adjacent to the Cook Battery site.

Comments: Order to Fence and Post the Cooks Court Property (115/125 Hill Completed Date: 04/12/1991
Completed Document Type: Fence & Post Order
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
unrestricted standards.
regarding the hazardous substances which remain on the property above Comments: Lien recorded for $2,249,419.35. Lien also serves as a deed notice Completed Date: 04/27/2006
Completed Document Type: Lien
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: No problems noted during inspection.

Completed Date: 03/26/2007
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Completed Date: 03/19/2020
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
cap maintenance tasks at the site.

Comments: DTSC issued Contract 18-T4526 A-2 to add funds to continue asphalt Completed Date: 12/09/2020
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
to 12/31/20.

Comments: Request for Funding (RFF) #18.0060 has a contract term from 11/1/18 Completed Date: 09/07/2018
Completed Document Type: State/Federal Funding Site Contract Fiscal Approval (RFF) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
completed and the subject contract was expired on 3/31/18.

Contract No. 15-T4109 A2 because the contracted tasks had been Comments: DTSC issued a Stop Work Order requesting ERRG to cease work under Completed Date: 04/02/2018
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
11/1/18 through 12/31/20.
pursuant to Contract 18-T4526, which covers for the period from Comments: DTSC issued the Work Order for asphalt cap maintenance activities Completed Date: 02/06/2019
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
period from 11/1/18 through 12/31/20.

Comments: Contract 18-T4526 covers asphalt cap maintenance activities for the Completed Date: 10/12/2018
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
scope of work
Comments: Amendment 2 to Contract 15-T4109 to add $100,000.00 and additional Completed Date: 03/07/2017
Completed Document Type: State/Federal Funding Site Contract Fiscal Approval (RFF) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
All other terms remain the same.

Comments: Contract 15-T4109 Amendment 1 extends contract expiration to 9/30/17.

Completed Date: 12/13/2016
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Contract 15-T4109, 6/30/16 - 12/31/16, $10,000.00 COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Comments: The RFF 22-0307 - Additional Funding and time for contractor to Completed Date: 03/02/2023
Completed Document Type: State/Federal Funding Site Contract Fiscal Approval (RFF) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
maintenance repair of the cap and fence.

Resources Group and the Department of Toxic Substances Control for Comments: The fully executed agreement between Engineering/Remediation Completed Date: 03/23/2009
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: CFA Signed by Budgets for repair and maintenance on the cap.

Completed Date: 01/09/2009
Completed Document Type: State/Federal Funding Site Contract Fiscal Approval (RFF) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
cracks on the asphalt cap surface performed in October 2021. perimeter fence and within the asphalt cap area and (b) repair of Comments: The Report documents (a) completion of vegetation removal along the Completed Date: 02/17/2022
Completed Document Type: Operation and Maintenance Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Cap Maintenance work has been completed.

Completed Date: 12/07/2022
Completed Document Type: Fieldwork
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
has been completed.

Comments: Annual Site Visit Inspection was conducted on 9/16/2022 and report Completed Date: 09/28/2022
Completed Document Type: Other Report
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Completed Preliminary Assessment recommending further investigation.

Completed Date: 06/01/1987
Completed Document Type: Preliminary Assessment Report
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
the period from 11/1/18 through 12/31/20.

Comments: Contract 18-T4526 A-1 covers asphalt cap maintenance activities for Completed Date: 03/12/2020
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
12/31/20.
cap maintenance activities for the period from 11/1/18 through Comments: Work Order Number 002 is for Contract 18-T4526 A-1 covering asphalt COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Completed Area Name: PROJECT WIDE
Comments: The Post HARP is for the 2/9/16 site visit.

Completed Date: 02/09/2016
Completed Document Type: Post HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Final OSDM signed.

Completed Date: 12/16/2016
Completed Document Type: Orphan Site Designation
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: The Post HARP is for the 1/15/16 site visit.

Completed Date: 01/21/2016
Completed Document Type: Post HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
2016, February 9, 2016, and April 18, 2016.

Comments: The inspection report covers site visits conducted on January 15, Completed Date: 06/15/2016
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 08/26/2016
Completed Document Type: PRP Identification Memorandum (Confidential) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 04/04/2011
Completed Document Type: State/Federal Funding Site Contract Fiscal Approval (RFF) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: to conduct maintenance (veg removal) of the cap Completed Date: 05/17/2011
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
term is from 5/1/11 through 6/30/11 and the budget is $5,500.00.

Comments: Contract 10-T1122 is for vegetation removal and cap maintenance. The Completed Date: 04/22/2011
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
37-6), and a summary report.
(utilizing authorized materials as detailed in Caltrans specification vegetation clearing on and around the asphalt cap, crack repair (if needed, through 6/30/2024). Additional tasks would include perform asphalt cap maintenance activities at the Cook Battery Site COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Comments: 23-12-15 Cap maintenance work completed.

Completed Date: 12/15/2023
Completed Document Type: Fieldwork
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
performed in February and October 2019.
cap area and (b) repair of cracks on the asphalt cap surface vegetation removal along the perimeter fence and within the asphalt Comments: The Cap Maintenance Summary Report documents (a) completion of Completed Date: 12/11/2019
Completed Document Type: Operation and Maintenance Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
clothing and debris, and 13 drums of purged groundwater and rinsate. cuttings from soil investigation borings, 2 drums of contaminated Comments: Completed RA. Removed 11 55-gallon drums of lead-contaminated soil Completed Date: 06/29/1992
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
operation and maintenance of the asphalt cap.
lead contaminated soil, encapsulation of site with asphalt, and include onsite neutralization of acidic soil, onsite consolidation of Comments: Final Removal Action Workplan (RAW) approved. RAW requirements Completed Date: 08/16/1995
Completed Document Type: Removal Action Workplan
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Cap Upgrade Completion Report approved.

Completed Date: 06/08/2005
Completed Document Type: Remedial Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Hill Avenue.

Comments: Fenced and capped adjacent Cooks Court property located at 115/125 Completed Date: 07/08/1991
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
continues to be protective of human health and the environment.

Comments: Completed Five-Year Review. The review found that the remedy Completed Date: 06/29/2001
Completed Document Type: Five-Year Review Reports
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 08/05/1993
Completed Document Type: Remedial Action Completion Report Completed Sub Area Name: Not reported
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Completed Area Name: PROJECT WIDE
monitoring wells and cap.

Comments: Approved O&M Plan for operation and maintenance of groundwater Completed Date: 06/24/1996
Completed Document Type: Operation and Maintenance Plan Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
sampling of neighborhood wells.

Comments: Completed RA. Soil sampling of bordering properties and groundwater Completed Date: 02/06/1991
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
site is capped and EPA will not take further action on the site.

Comments: Completed Preliminary Assessment for US EPA which confirmed that the Completed Date: 05/14/1999
Completed Document Type: Preliminary Assessment Report
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 08/25/2023
Completed Document Type: Pre-HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 08/28/2023
Completed Document Type: Post HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 08/30/2023
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
to limit vegetation through repaired cracks.
repair. In addition, an herbicide was included in the scope of work Sealer, previously used at the site, was chosen for this year crack of vegetation growth. Therefore, the Latexite Airport Grade Asphalt provide benefit with regard to long term crack sealing and prevention Comments: The Caltrans spec sealer used in the 2023 crack repair did not Completed Date: 10/11/2024
Completed Document Type: Correspondence
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 08/22/2023
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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clean fill; installed temporary chip-seal cap.
soil and battery casings. Imported approximately 140 cubic yards of Comments: Completed RA. Removed approximately 315 cubic yards of contaminated Completed Date: 10/05/1989
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
wells to investigate groundwater contamination.

Comments: Completed FRIFS (Groundwater). Installed four groundwater monitoring Completed Date: 05/31/1991
Completed Document Type: *Engineering Evaluation / Cost Analysis - Non-Time Critical Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Completed FRIFS (Soil). Performed soil sampling investigation.

Completed Date: 07/19/1991
Completed Document Type: *Engineering Evaluation / Cost Analysis - Non-Time Critical Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
backfilled with clean fill.

Sidewall confirmation samples were taken, and excavation was casings and contaminated soil were removed (40-50 cubic yards).

Comments: Completed RA. Stabilization of property at 41 Roger Lane: battery Completed Date: 08/05/1993
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
have undermined house foundation.
buried battery casings which had to be left in place as removal would Comments: Completed RA. Tobar House, #21 Cook’s Court: concrete pad placed over Completed Date: 02/23/1994
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
demolished and disposed offsite.

Comments: Completed RA. The house located onsite (139 Hill Avenue) was Completed Date: 11/23/1994
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Approved Remedial Design for implementation of RAW.

Completed Date: 11/30/1995
Completed Document Type: Removal Action Design
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
encapsulation of contaminated soil.

Comments: Completed RA. Completion of neutralization, consolidation and Completed Date: 06/25/1996
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Acres: 1.5
Site Type Detailed: State Response or NPL
Site Type: State Response
Site Code: 200072
Status Date: 06/28/2006
Status: Certified / Operation & Maintenance
Facility ID: 07360035
City,State,Zip: OAKLEY, CA 94561
Address: 139 HILL AVENUE
Name: COOK BATTERY (OAKLEY BATTERY)
ENVIROSTOR:

Schedule Revised Date: Not reported
Schedule Due Date: 06/30/2026
Schedule Document Type: Five-Year Review Reports
Schedule Sub Area Name: Not reported
Schedule Area Name: PROJECT WIDE
Future Due Date: Not reported
Future Document Type: Not reported
Future Sub Area Name: Not reported
Future Area Name: Not reported
Comments: Not reported
Completed Date: 01/22/2024
Completed Document Type: Operation and Maintenance Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 03/14/2014
Completed Document Type: Preliminary Assessment/Site Inspection Report (PA/SI) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Vegetation and debris cleared from site.

Completed Date: 06/29/2011
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Fieldwork was conducted on 6/14/2011.

Completed Date: 06/15/2011
Completed Document Type: Fieldwork
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Completed Site Screening which recommended a Preliminary Assessment.

Completed Date: 03/24/1987
Completed Document Type: Site Screening
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Completed Expedited Response Action. Fenced and posted site.

Completed Date: 01/30/1989
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Completed Area Name: PROJECT WIDE
Comments: Site visit has been conducted on 9/16/2022
Completed Date: 09/16/2022
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Site Visit and Report have been completed.

Completed Date: 08/15/2022
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Completed Info:

Alias Type: Envirostor ID Number
Alias Name: 07360035
Alias Type: Project Code (Site Code)
Alias Name: 200072
Alias Type: PCode
Alias Name: P23001
Alias Type: GeoTracker Global ID
Alias Name: SLT5S1103150
Alias Type: EPA (FRS #)
Alias Name: 110030985682
Alias Type: EPA Identification Number
Alias Name: CAD983613910
Alias Type: APN
Alias Name: 033090028
Alias Type: APN
Alias Name: 033-090-028-3
Alias Type: Alternate Name
Alias Name: OAKLEY BATTERY YARD
Alias Type: Alternate Name
Alias Name: COOKS BATTERY SITE
Alias Type: Alternate Name
Alias Name: COOK BATTERY RECLAMATION
Alias Type: Alternate Name
Alias Name: BATTERY RECLAMATION BUSINESS
Potential Description: SOIL
Confirmed COC: Lead
Potential COC: Lead
Past Use: BATTERY RECLAMATION
APN: 033-090-028-3, 033090028
Longitude: -121.6921
Latitude: 37.97391
Funding: Orphan Funds
Site Mgmt Req: NONE SPECIFIED
Restricted Use: NO
Special Program: SRA Orphan
Senate: 03
Assembly: 11
Division Branch: Cleanup Sacramento
Supervisor: Ruth Cayabyab
Program Manager: Chinh Vu
Lead Agency: SMBRP
Regulatory Agencies: SMBRP
NPL: NO
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Completed Document Type: Correspondence
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: 2023-12-04 WO A-4 Executed
Completed Date: 12/04/2023
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 09/25/2024
Completed Document Type: Post HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: 24-04-19 - A-5 executed
Completed Date: 04/19/2024
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Completed the annual site inspection on September 19, 2024.

Completed Date: 09/30/2024
Completed Document Type: Land Use Restriction - Site Inspection/Visit Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: 24-01-08 - RFF completed
Completed Date: 01/08/2024
Completed Document Type: State/Federal Funding Site Contract Fiscal Approval (RFF) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
approved by SERU Chief.

Comments: Pre-HARP form reviewed and signed by HSP Staff IH and signed and Completed Date: 06/06/2022
Completed Document Type: Pre-HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: PM task completed for FY24/25
Completed Date: 06/30/2025
Completed Document Type: Project Management (Confidential) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: PM duties complete for FY 23/24.

Completed Date: 06/30/2024
Completed Document Type: Project Management (Confidential) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Project Management for FY22/23 is complete.

Completed Date: 06/30/2023
Completed Document Type: Project Management (Confidential) Completed Sub Area Name: Not reported
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Completed Area Name: PROJECT WIDE
Comments: Notice published 7/1/2011
Completed Date: 07/01/2011
Completed Document Type: Public Notice
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
property.
resurfacing the asphalt cap and removing trees from the Cook Battery of human health and the environment. This review recommends evaluates the approved remedy and ensures that it remains protective Comments: DTSC prepared the 2016 Five Year Review. The Five Year Review Completed Date: 06/30/2016
Completed Document Type: Five-Year Review Reports
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
and announces a community meeting on July 25.

Comments: Fact sheet provides an update of the current activities at the site Completed Date: 07/01/1991
Completed Document Type: Community Update (Fact Sheets) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 12/18/2025
Completed Document Type: Post HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Signed pre-HARP uploaded
Completed Date: 09/30/2025
Completed Document Type: Pre-HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Site inspection conducted on October 13, 2025 with contractor ERRG Completed Date: 10/31/2025
Completed Document Type: Land Use Restriction - Site Inspection/Visit Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Sent PM change notification to contractor and internally within DTSC.

Completed Date: 08/20/2024
Completed Document Type: Correspondence
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Uploaded signed Pre-HARP
Completed Date: 09/18/2024
Completed Document Type: Pre-HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: 5/24/2024 emails for DTSC PM change notification Completed Date: 05/24/2024
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John Thomas as a responsible party.

Comments: Amendment to Remedial Action Order, Docket No. HSA 88/89-031, to add Completed Date: 09/08/1989
Completed Document Type: Amendment - Order/Agreement
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
approved.
encapsulation of lead contaminated soil. Negative Declaration Comments: Approved RAW for onsite neutralization, consolidation and Completed Date: 08/16/1995
Completed Document Type: CEQA - Initial Study/ Neg. Declaration Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Final Cap Maintenance report has been received.

Completed Date: 12/08/2022
Completed Document Type: Operation and Maintenance Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
and cracks sealed.

Comments: Cap maintenances were performed as planned. Vegetation was removed Completed Date: 11/26/2024
Completed Document Type: Operation and Maintenance Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
completed on 10/20/17.
clearing, tree removal, fence repair, cap repair began on 10/9/17 and Comments: Operation and maintenance activities consisting of vegetation Completed Date: 10/20/2017
Completed Document Type: Fieldwork
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
asphalt sealing, and fence repairs at the Cook Battery site. maintenance activities to be performed, such as vegetation clearance, protecting onsite personnel from hazards associated with the cap Comments: The Health and Safety Plan defines the protocols necessary for Completed Date: 08/29/2017
Completed Document Type: Health & Safety Plan
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 08/29/2023
Completed Document Type: Five-Year Review Reports
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
asphalt repair at the site.
activities which included vegetation removal, fence repair, and Comments: In November 2017, DTSC contractor ERRG completed cap maintenance Completed Date: 01/03/2018
Completed Document Type: Operation and Maintenance Report Completed Sub Area Name: Not reported
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on asphalt cap, crack repair, and reporting.
tasks at Cook Battery. Additional tasks include vegetation clearing Comments: The RFF 20-0171 requests funding for contractor to perform additional Completed Date: 10/08/2020
Completed Document Type: State/Federal Funding Site Contract Fiscal Approval (RFF) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
the southeast corner the fence was damaged.

Comments: the cap is in good condition; however, weeds were overgrown and in Completed Date: 04/30/2008
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 03/24/2005
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Deed Notice regarding the contamination.

Comments: Site certified. Contaminated soils capped in place. A lien acts as a Completed Date: 06/14/2006
Completed Document Type: Certification
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
groundwater. High levels of lead detected in soil and groundwater. contamination. County and DHS (predecessor to DTSC) test soil and Comments: Site Discovery. County Health Services first notified of potential Completed Date: 12/08/1980
Completed Document Type: * Discovery
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
No. not used).

Comments: Issued I&SE Determination due to high levels of lead in soil (Docket Completed Date: 12/15/1988
Completed Document Type: Imminent and/or Subst. Endangerment Determination Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
and remediation of the site due to high levels of lead in soil.

Comments: Issued Remedial Action Order HSA 88/89-031 requiring investigation Completed Date: 05/01/1989
Completed Document Type: Unilateral Order (I/SE, RAO, CAO, EPA AO) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
non-compliance with the Remedial Action Order issued.

Comments: Amended RAO to add additional respondent. Final Determination of Completed Date: 09/30/1989
Completed Document Type: Final Determination of Non-Compliance Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Completed Area Name: PROJECT WIDE
Comments: The document has been fully executed.

Completed Date: 07/21/2022
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: End of the FY. Switching to FY22/23 activity.

Completed Date: 06/28/2022
Completed Document Type: Project Management (Confidential) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Funding Request Approved.

Completed Date: 03/18/2022
Completed Document Type: State/Federal Funding Site Contract Fiscal Approval (RFF) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: The Work Order is fully approved and has been executed.

Completed Date: 09/15/2022
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: The Field Order authorizes ERRG to use the $1,000 contingency.

Completed Date: 11/23/2020
Completed Document Type: State/Federal Funded Site Field Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Signed WO# 1-526-1.6-200072 sent to contractor on September 3, 2024 Completed Date: 09/03/2024
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
types or activities specified on the Multi Project Code list. unspecified activities that are not associated with any document response, public record act compliance and coordination, and other management inquiry response, project history research, public inquiry weekly/periodic update, project tracking, management briefing, EnviroStor update, Terradex Alert response and coordination, project management tasks for the subject project site such as Comments: From July 1, 2020 through June 30 2021, DTSC performed various Completed Date: 06/30/2021
Completed Document Type: Project Management (Confidential) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
funds to complete asphalt cap maintenance tasks.

Comments: The Work Order Number 003 for Contract No. 18-T4526 A-2 adds new Completed Date: 12/21/2020
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Completed Date: 09/24/2009
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Not reported
Contractor used 3 people and 1 Bin to contain the cuttings and debris.

Comments: Work completed on June 18th, fence repaired and vegetation removed.

Completed Date: 06/18/2009
Completed Document Type: Fieldwork
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Responses to public comments on Draft Removal Action Workplan Completed Date: 05/31/1995
Completed Document Type: Other Report
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
health threat and should include a DTSC contact number.

A sign should be posted that states that the Site poses a public Comments: The overgrown weeds need to be trimmed and the debris/trash removed.

Completed Date: 05/27/2011
Completed Document Type: Five-Year Review Reports
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 03/29/2006
Completed Document Type: Other Report
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
health and the environment.

Comments: The report noted that the final remedy is still protective of public Completed Date: 06/14/2006
Completed Document Type: Five-Year Review Reports
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Cap Inspection Report signed off 6/22/05.

Completed Date: 06/22/2005
Completed Document Type: Other Report
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
maintenance.

Comments: Abandoned all six remaining monitoring wells and performed site Completed Date: 09/30/2003
Completed Document Type: Well Decommissioning Report
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Report documenting groundwater monitoring and site/cap maintenance.

Completed Date: 05/09/2002
Completed Document Type: Operation and Maintenance Report Completed Sub Area Name: Not reported
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Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
property.
resurfacing the asphalt cap and removing trees from the Cook Battery of human health and the environment. This review recommends evaluates the approved remedy and ensures that it remains protective Comments: DTSC prepared the 2016 Five Year Review. The Five Year Review Completed Date: 06/05/2012
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 06/30/2011
Completed Document Type: Correspondence
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Work order for the maintenance and repair of the Cap and Fence Completed Date: 04/10/2009
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
DTSC constructor.

Fence repair and weed removal are scheduled to begin in June 2009 by were overgrown and in the southeast corner the fence was damaged. signs of significant cracking. However, it was observed that weeds Comments: The asphalt surface was observed to be in good condition, with no Completed Date: 06/01/2009
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
debris removed.
undisturbed. However, the overgrown weeds need to be trimmed and the Impacted soil remains under the asphalt surface, which remains remedies remain protective of human health and the environment.

Comments: Upon observing the current site conditions, DTSC concludes that the Completed Date: 07/08/2010
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
performed in October 2020.
cap area and (b) repair of cracks on the asphalt cap surface vegetation removal along the perimeter fence and within the asphalt Comments: The Cap Maintenance Summary Report documents (a) completion of Completed Date: 01/14/2021
Completed Document Type: Operation and Maintenance Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
fence as required by the LUC.

Comments: Completion comment - The report documents the repair to the cap and COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Completed Document Type: Fence & Post Order
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Avenue) adjacent to the Cook Battery site.

Comments: Order to Fence and Post the Cooks Court Property (115/125 Hill Completed Date: 04/12/1991
Completed Document Type: Fence & Post Order
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
unrestricted standards.
regarding the hazardous substances which remain on the property above Comments: Lien recorded for $2,249,419.35. Lien also serves as a deed notice Completed Date: 04/27/2006
Completed Document Type: Lien
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: No problems noted during inspection.

Completed Date: 03/26/2007
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 03/22/2006
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 03/24/2004
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
to limit vegetation through repaired cracks.
repair. In addition, an herbicide was included in the scope of work Sealer, previously used at the site, was chosen for this year crack vegetation growth. Therefore, the Latexite Airport Grade Asphalt benefit with regard to long term crack sealing and prevention of Comments: The Caltran spec sealer used in the 2023 crack repair did not provide Completed Date: 10/11/2024
Completed Document Type: Fieldwork
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
environment and human health. Recommend weed abatement.

Comments: Cap in good condition and still provides protectiveness to Completed Date: 04/29/2014
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Cap in good condition; still protective to surrounding environment Completed Date: 06/12/2013
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Comments: Contract 18-T4526 covers asphalt cap maintenance activities for the Completed Date: 10/12/2018
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
scope of work
Comments: Amendment 2 to Contract 15-T4109 to add $100,000.00 and additional Completed Date: 03/07/2017
Completed Document Type: State/Federal Funding Site Contract Fiscal Approval (RFF) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
All other terms remain the same.

Comments: Contract 15-T4109 Amendment 1 extends contract expiration to 9/30/17.

Completed Date: 12/13/2016
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Contract 15-T4109, 6/30/16 - 12/31/16, $10,000.00 Completed Date: 07/15/2016
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: The HARP covers the period from 1/1/18 through 12/31/18.

Completed Date: 01/08/2018
Completed Document Type: Pre-HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
15-T4109 and Tasks 4, 5, 6, and 7 of Contract 15-T4109 A2. repair activities as described in Tasks 1, 2, and 3 of Contract Comments: DTSC issued the Work Order 001 to ERRG for vegetation removal and cap Completed Date: 06/13/2017
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
expiration to 3/31/18, and increase. All other terms remain the same. the budget to a total maximum of $110,000.00, and extends contract Comments: Contract 15-T4109 Amendment 2 specifies additional tasks, increase Completed Date: 06/06/2017
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: The HARP is effective from 1/13/2016 through 1/12/2017.

Completed Date: 01/07/2016
Completed Document Type: Pre-HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
used).

Comments: Order to fence and post site issued to John Thomas (Docket No. not Completed Date: 10/21/1988
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Completed Date: 09/28/2022
Completed Document Type: Other Report
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Completed Preliminary Assessment recommending further investigation.

Completed Date: 06/01/1987
Completed Document Type: Preliminary Assessment Report
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
the period from 11/1/18 through 12/31/20.

Comments: Contract 18-T4526 A-1 covers asphalt cap maintenance activities for Completed Date: 03/12/2020
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
12/31/20.
cap maintenance activities for the period from 11/1/18 through Comments: Work Order Number 002 is for Contract 18-T4526 A-1 covering asphalt Completed Date: 03/19/2020
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
cap maintenance tasks at the site.

Comments: DTSC issued Contract 18-T4526 A-2 to add funds to continue asphalt Completed Date: 12/09/2020
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
to 12/31/20.

Comments: Request for Funding (RFF) #18.0060 has a contract term from 11/1/18 Completed Date: 09/07/2018
Completed Document Type: State/Federal Funding Site Contract Fiscal Approval (RFF) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
completed and the subject contract was expired on 3/31/18.

Contract No. 15-T4109 A2 because the contracted tasks had been Comments: DTSC issued a Stop Work Order requesting ERRG to cease work under Completed Date: 04/02/2018
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
11/1/18 through 12/31/20.
pursuant to Contract 18-T4526, which covers for the period from Comments: DTSC issued the Work Order for asphalt cap maintenance activities Completed Date: 02/06/2019
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
period from 11/1/18 through 12/31/20.

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Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: to conduct maintenance (veg removal) of the cap Completed Date: 05/17/2011
Completed Document Type: State/Federal Funded Site Work Order Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
term is from 5/1/11 through 6/30/11 and the budget is $5,500.00.

Comments: Contract 10-T1122 is for vegetation removal and cap maintenance. The Completed Date: 04/22/2011
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
37-6), and a summary report.
(utilizing authorized materials as detailed in Caltrans specification vegetation clearing on and around the asphalt cap, crack repair (if needed, through 6/30/2024). Additional tasks would include perform asphalt cap maintenance activities at the Cook Battery Site Comments: The RFF 22-0307 - Additional Funding and time for contractor to Completed Date: 03/02/2023
Completed Document Type: State/Federal Funding Site Contract Fiscal Approval (RFF) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
maintenance repair of the cap and fence.

Resources Group and the Department of Toxic Substances Control for Comments: The fully executed agreement between Engineering/Remediation Completed Date: 03/23/2009
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: CFA Signed by Budgets for repair and maintenance on the cap.

Completed Date: 01/09/2009
Completed Document Type: State/Federal Funding Site Contract Fiscal Approval (RFF) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
cracks on the asphalt cap surface performed in October 2021. perimeter fence and within the asphalt cap area and (b) repair of Comments: The Report documents (a) completion of vegetation removal along the Completed Date: 02/17/2022
Completed Document Type: Operation and Maintenance Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Cap Maintenance work has been completed.

Completed Date: 12/07/2022
Completed Document Type: Fieldwork
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
has been completed.

Comments: Annual Site Visit Inspection was conducted on 9/16/2022 and report COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Hill Avenue.

Comments: Fenced and capped adjacent Cooks Court property located at 115/125 Completed Date: 07/08/1991
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
continues to be protective of human health and the environment.

Comments: Completed Five-Year Review. The review found that the remedy Completed Date: 06/29/2001
Completed Document Type: Five-Year Review Reports
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 08/05/1993
Completed Document Type: Remedial Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: The Post HARP is for the 2/9/16 site visit.

Completed Date: 02/09/2016
Completed Document Type: Post HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Final OSDM signed.

Completed Date: 12/16/2016
Completed Document Type: Orphan Site Designation
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: The Post HARP is for the 1/15/16 site visit.

Completed Date: 01/21/2016
Completed Document Type: Post HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
2016, February 9, 2016, and April 18, 2016.

Comments: The inspection report covers site visits conducted on January 15, Completed Date: 06/15/2016
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 08/26/2016
Completed Document Type: PRP Identification Memorandum (Confidential) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 04/04/2011
Completed Document Type: State/Federal Funding Site Contract Fiscal Approval (RFF) COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Completed Date: 08/30/2023
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
to limit vegetation through repaired cracks.
repair. In addition, an herbicide was included in the scope of work Sealer, previously used at the site, was chosen for this year crack of vegetation growth. Therefore, the Latexite Airport Grade Asphalt provide benefit with regard to long term crack sealing and prevention Comments: The Caltrans spec sealer used in the 2023 crack repair did not Completed Date: 10/11/2024
Completed Document Type: Correspondence
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 08/22/2023
Completed Document Type: State/Federal Funded Site Contract Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: 23-12-15 Cap maintenance work completed.

Completed Date: 12/15/2023
Completed Document Type: Fieldwork
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
performed in February and October 2019.
cap area and (b) repair of cracks on the asphalt cap surface vegetation removal along the perimeter fence and within the asphalt Comments: The Cap Maintenance Summary Report documents (a) completion of Completed Date: 12/11/2019
Completed Document Type: Operation and Maintenance Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
clothing and debris, and 13 drums of purged groundwater and rinsate. cuttings from soil investigation borings, 2 drums of contaminated Comments: Completed RA. Removed 11 55-gallon drums of lead-contaminated soil Completed Date: 06/29/1992
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
operation and maintenance of the asphalt cap.
lead contaminated soil, encapsulation of site with asphalt, and include onsite neutralization of acidic soil, onsite consolidation of Comments: Final Removal Action Workplan (RAW) approved. RAW requirements Completed Date: 08/16/1995
Completed Document Type: Removal Action Workplan
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Cap Upgrade Completion Report approved.

Completed Date: 06/08/2005
Completed Document Type: Remedial Action Completion Report COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
demolished and disposed offsite.

Comments: Completed RA. The house located onsite (139 Hill Avenue) was Completed Date: 11/23/1994
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Approved Remedial Design for implementation of RAW.

Completed Date: 11/30/1995
Completed Document Type: Removal Action Design
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
encapsulation of contaminated soil.

Comments: Completed RA. Completion of neutralization, consolidation and Completed Date: 06/25/1996
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
monitoring wells and cap.

Comments: Approved O&M Plan for operation and maintenance of groundwater Completed Date: 06/24/1996
Completed Document Type: Operation and Maintenance Plan Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
sampling of neighborhood wells.

Comments: Completed RA. Soil sampling of bordering properties and groundwater Completed Date: 02/06/1991
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
site is capped and EPA will not take further action on the site.

Comments: Completed Preliminary Assessment for US EPA which confirmed that the Completed Date: 05/14/1999
Completed Document Type: Preliminary Assessment Report
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 08/25/2023
Completed Document Type: Pre-HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 08/28/2023
Completed Document Type: Post HARP Form (Confidential)
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Fieldwork was conducted on 6/14/2011.

Completed Date: 06/15/2011
Completed Document Type: Fieldwork
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Completed Site Screening which recommended a Preliminary Assessment.

Completed Date: 03/24/1987
Completed Document Type: Site Screening
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Completed Expedited Response Action. Fenced and posted site.

Completed Date: 01/30/1989
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
clean fill; installed temporary chip-seal cap.
soil and battery casings. Imported approximately 140 cubic yards of Comments: Completed RA. Removed approximately 315 cubic yards of contaminated Completed Date: 10/05/1989
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
wells to investigate groundwater contamination.

Comments: Completed FRIFS (Groundwater). Installed four groundwater monitoring Completed Date: 05/31/1991
Completed Document Type: *Engineering Evaluation / Cost Analysis - Non-Time Critical Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Completed FRIFS (Soil). Performed soil sampling investigation.

Completed Date: 07/19/1991
Completed Document Type: *Engineering Evaluation / Cost Analysis - Non-Time Critical Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
backfilled with clean fill.

Sidewall confirmation samples were taken, and excavation was casings and contaminated soil were removed (40-50 cubic yards).

Comments: Completed RA. Stabilization of property at 41 Roger Lane: battery Completed Date: 08/05/1993
Completed Document Type: Removal Action Completion Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
have undermined house foundation.
buried battery casings which had to be left in place as removal would Comments: Completed RA. Tobar House, #21 Cook’s Court: concrete pad placed over Completed Date: 02/23/1994
Completed Document Type: Removal Action Completion Report COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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No Further Action Date: 06/14/2006
Stop Description: Not reported
Stop Method: Not reported
Discharge Cause: Not reported
Discharge Source: Not reported
How Discovered Description: Not reported
How Discovered: Not reported
Leak Reported Date: 01/02/1965
Begin Date: 03/30/1995
Quantity Released Gallons: Not reported
Cuf Case: Not reported
Coordinate Source: Not reported
EPA Region: 9
Potential Contaminants of Concern: Lead
Potential Media Affected: Under Investigation
File Location: DTSC
RB Case Number: SLT5S110
Local Agency: Not reported
Case Worker: Not reported
Case Type: Cleanup Program Site
Longitude: -121.688641
Latitude: 37.97429
Lead Agency Case Number: Not reported
Lead Agency: DEPARTMENT OF TOXIC SUBSTANCES CONTROL
Global Id: SLT5S1103150
Status Date: 06/14/2006
Facility Status: Completed - Case Closed
Region: STATE
City,State,Zip: OAKLEY, CA
Address: 139 HILL AVENUE
Name: COOKS BATTERY RECLAMATION SITE
CPS-SLIC:

Schedule Revised Date: Not reported
Schedule Due Date: 06/30/2026
Schedule Document Type: Five-Year Review Reports
Schedule Sub Area Name: Not reported
Schedule Area Name: PROJECT WIDE
Future Due Date: Not reported
Future Document Type: Not reported
Future Sub Area Name: Not reported
Future Area Name: Not reported
Comments: Not reported
Completed Date: 01/22/2024
Completed Document Type: Operation and Maintenance Report Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 03/14/2014
Completed Document Type: Preliminary Assessment/Site Inspection Report (PA/SI) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Vegetation and debris cleared from site.

Completed Date: 06/29/2011
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 12081980
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: Not reported
Activity Name: DISCOVERY
Activity: DISC
Facility ID: 07360035
State Senate District Code: 07
State Assembly District Code: 15
Lat/Long Description: Not reported
Lat/long Method: Not reported
Lat/Long (dms): 0 0 0 / 0 0 0
Lat/Long Direction: Not reported
Region Water Control Board Name: CENTRAL VALLEY
Region Water Control Board: CV
Supervisor Responsible for Site: Not reported
Staff Member Responsible for Site: BBROWN
Groundwater Contamination: Suspected
Date Site Hazard Ranked: Not reported
Hazardous Ranking Score: Not reported
Cortese: Not reported
Access: Controlled
SIC Name: MANU - ELECTRONIC & OTHER ELECTRIC EQUIP
SIC Code: 36
NPL: Not Listed
Lead Agency: DEPT OF TOXIC SUBSTANCES CONTROL
Status Name: ANNUAL WORKPLAN - ACTIVE SITE
Status: ANNUAL WORKPLAN (AWP) - ACTIVE SITE
State Senate District: 05011986
File Name: Not reported
Branch Name: NORTH COAST
Branch: NC
Type: STATE FUNDED SITE
Facility Type: STATE
Facility ID: 07360035
Region: BERKELEY
City: OAKLEY
Address: 139 HILL AVENUE
Name: COOK BATTERY (OAKLEY BATTERY)
Calsite:

Click here to access the California GeoTracker records for this facility:
final remedy implemented in 2006.

Site History: DTSC Lead - See Envirostor for more information. Site is capped - RWQCB Region: CENTRAL VALLEY RWQCB (REGION 5S)
Facility Project Subtype: Not reported
Military DOD Site: No
CA Enviroscreen 4 Score: 45-50%
CA Enviroscreen 3 Score: 51-55%
Disadvantaged Community: Not reported
Dwr Groundwater Subbasin Name: San Joaquin Valley - East Contra Costa (5-022.19) CA Water Watershed Name: San Joaquin Delta (544.00)
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 12301988
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: ISE
Activity Name: I/SE, IORSE, FFA, FFSRA, VCA, EA
Activity: ORDER
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 03241987
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: Not reported
Activity Name: SITE SCREENING
Activity: SS
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Proposed Budget: 0
AWP Code: Not reported
Activity Name: FINAL DETERMINATION OF NON-COMPLIANCE
Activity: FDNC
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 05301989
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: Not reported
Activity Name: I/SE, IORSE, FFA, FFSRA, VCA, EA
Activity: ORDER
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 01301989
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: F&P
Activity Name: EXPEDITED RESPONSE ACTION
Activity: ERA
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Liquids Removed (Gals): 315
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 10051989
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: BTTRY
Activity Name: REMOVAL ACTION
Activity: RA
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 09301989
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: Not reported
Activity Name: I/SE, IORSE, FFA, FFSRA, VCA, EA
Activity: ORDER
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 09301989
Revised Due Date: Not reported
AWP Completion Date: Not reported
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Elevation Site Database(s) EPA ID Number
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 05311991
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: GW
Activity Name: FOCUSED REMEDIAL INVESTIGATION/FEASIBILITY STUDY Activity: FRIFS
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
WORKDONE JULY 1991.

CALLEDCOOKS COURT. BULK OF WORK DONE APRIL 1991, WITH SOME RESIDUAL Activity Comments: THIS RA CONSISTED OF FENCING AND POSTING AN ADJACENT PROPERTY Removal Action Certification: N
Action Included Fencing: X
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 07081991
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: FENCE
Activity Name: REMOVAL ACTION
Activity: RA
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
CONTAMIN-ATED SOIL INCLUDING LARGE PIECES OF BATTERY CASINGS.

Activity Comments: REMOVAL AND REDISPOSAL OF APPROXIMATELY 315 CU YDS OF HIGHLY Removal Action Certification: N
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: X
Liquids Treated (Gals): 0
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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AWP Code: BASE
Activity Name: POTENTIAL RESPONSIBLE PARTY SEARCH
Activity: PRP
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
NON-HAZARDOUSWASTE.

Activity Comments: 26 55-GALLON DRUMS WERE REMOVED. OF THESE, 13 CONTAINED Removal Action Certification: N
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 06291992
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: SOIL
Activity Name: REMOVAL ACTION
Activity: RA
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 07191991
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: SOIL
Activity Name: FOCUSED REMEDIAL INVESTIGATION/FEASIBILITY STUDY Activity: FRIFS
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 08051993
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: 41ROG
Activity Name: LONG-TERM SITE STABILIZATION CERTIFICATION Activity: STAB
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
THREECLOSED TOP STORAGE BINS.

Activity Comments: AN ESTIMATE OF 40 TO 50 CU YDS WERE EXCAVATED AND DEPOSITED IN Removal Action Certification: N
Action Included Fencing: X
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 45
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 08051993
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: 41ROG
Activity Name: REMOVAL ACTION
Activity: RA
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 01271993
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Map ID MAP FINDINGS
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Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 09301994
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: ENHAN
Activity Name: POTENTIAL RESPONSIBLE PARTY SEARCH
Activity: PRP
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
LEADCONTAMINATED SOIL.

Activity Comments: CONCRETE PAD PLACED TO REMOVE THE THREAT OF CONTACT WITH Removal Action Certification: N
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: X
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 02231994
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: TOBAR
Activity Name: REMOVAL ACTION
Activity: RA
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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AWP Code: Not reported
Activity Name: REMOVAL ACTION WORKPLAN
Activity: RAW
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 08161995
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: NEG D
Activity Name: CEQA INCLUDING NEGATIVE DECS
Activity: CEQA
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
WEREHAULED AWAY FOR DISPOSAL.

Activity Comments: APPROXIMATELY 75 TONS OF DEBRIS AND 30 GALLONS OF HOUSEHOLD WASTE Removal Action Certification: N
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 75
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 11231994
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: HOUSE
Activity Name: REMOVAL ACTION
Activity: RA
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 06251996
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: ACID
Activity Name: REMOVAL ACTION
Activity: RA
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 11301995
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: Not reported
Activity Name: DESIGN
Activity: DES
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 08161995
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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For Commercial Reuse: 0
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 06241996
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: PLAN
Activity Name: OPERATION & MAINTENANCE
Activity: OM
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: Not reported
Revised Due Date: 07012006
AWP Completion Date: 07012005
Proposed Budget: 0
AWP Code: Not reported
Activity Name: CERTIFICATION
Activity: CERT
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
SOIL.

Activity Comments: ONSITE NEUTRALIZATION, CONSOLIDATION AND ENCAPSULATION OFCONTAMINATED Removal Action Certification: N
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: X
Liquids Treated (Gals): 797
Liquids Removed (Gals): 1449
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Proposed Budget: 0
AWP Code: EPA
Activity Name: PRELIMINARY ENDANGERMENT ASSESSMENT
Activity: PEA
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
EXCAVATED;SITE GRADED AND CAPPED WITH CHIP SEAL.

Activity Comments: SITE FENCED AND POSTED; 523 TONS OF LEAD CONTAMINATED SOIL Removal Action Certification: N
Action Included Fencing: X
Well Decommissioned: Not reported
Action Included Capping: X
Liquids Treated (Gals): 0
Liquids Removed (Gals): 523
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 02061991
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: Not reported
Activity Name: REMOVAL ACTION
Activity: RA
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 06292001
Revised Due Date: Not reported
AWP Completion Date: Not reported
Proposed Budget: 0
AWP Code: Not reported
Activity Name: FIVE-YEAR REVIEW REQUIRED BY CERCLA
Activity: 5YEAR
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
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Comments Date: 01301989
Comments: Conducted Potential Responsible Party search.

Comments Date: 01271993
periodically for deterioration.
of the wells. The cap will continue to be inspected
consistently been non-detect. In Spring 2003, DTSC closed all Since the removal action, groundwater monitoring results have soils. Buried battery casings were found on and near the site. batteries. High concentrations of lead were present in surface Salvageable lead was removed from discarded automobile
used for a battery reclamation business in the 1950s and 1960s.

Background Info: The Cook Battery Reclamation site, a residential property, was Alternate City,St,Zip: OAKLEY, CA 94561
Alternate Address: 139 HILL AVENUE
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: Not reported
Revised Due Date: Not reported
AWP Completion Date: 09302005
Proposed Budget: 0
AWP Code: Not reported
Activity Name: FIVE-YEAR REVIEW REQUIRED BY CERCLA
Activity: 5YEAR
Facility ID: 07360035
Unknown Type: 0
For Residential Reuse: 0
For Industrial Reuse: 0
For Commercial Reuse: 0
Activity Comments: Not reported
Removal Action Certification: Not reported
Action Included Fencing: Not reported
Well Decommissioned: Not reported
Action Included Capping: Not reported
Liquids Treated (Gals): 0
Liquids Removed (Gals): 0
Definition of Status: ANNUAL WORKPLAN - ACTIVE SITE
Activity Status: AWP
Request to Delete Activity: Not reported
Estimated Size: Not reported
Est Person-Yrs to complete: 0
Comments Date: 05141999
Revised Due Date: Not reported
AWP Completion Date: Not reported
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Comments: Completed RA. Stabilization of property at 41 Rogers Lane:

Comments Date: 08051993
Comments: Completed FRIFS (Soil). Performed soil sampling investigation.

Comments Date: 07191991
Comments: Completed RA. Fenced and posted adjacent Cooks Court property.

Comments Date: 07081991
Comments: continues to be protective of human health and the environment.

Comments Date: 06292001
Comments: Completed Five-Year Review. The review found that the remedy Comments Date: 06292001
Comments: groundwater and rinsate.

Comments Date: 06291992
Comments: contaminated clothing and debris, and 13 drums of purged Comments Date: 06291992
Comments: soil cuttings from soil investigation borings, 2 drums of Comments Date: 06291992
Comments: Completed RA. Removed 11 55-gallon drums of lead-contaminated Comments Date: 06291992
Comments: encapsulation of contaminated soil.

Comments Date: 06251996
Comments: Completed RA. Completion of neutralization, consolidation and Comments Date: 06251996
Comments: monitoring wells and cap.

Comments Date: 06241996
Comments: Approved O&M Plan for operation and maintenance of groundwater Comments Date: 06241996
Comments: investigation.

Comments Date: 06011987
Comments: Completed Preliminary Assessment recommending further Comments Date: 06011987
Comments: monitoring wells to investigate groundwater contamination.

Comments Date: 05311991
Comments: Completed FRIFS (Groundwater). Installed four groundwater Comments Date: 05311991
Comments: lead in soil.

Comments Date: 05301989
Comments: investigation and remediation of the site due to high levels of Comments Date: 05301989
Comments: Issued Remedial Action Order HSA 88/89-031 requiring Comments Date: 05301989
Comments: Completed PEA for US EPA.

Comments Date: 05141999
Comments: Assessment.

Comments Date: 03241987
Comments: Completed Site Screening which recommended a Preliminary Comments Date: 03241987
Comments: as removal would have undermined house foundation.

Comments Date: 02231994
Comments: placed over buried battery casings which had to be left in place Comments Date: 02231994
Comments: Completed RA. Tobar House, #21 Cook’s Court: concrete pad Comments Date: 02231994
Comments: groundwater sampling of neighborhood wells.

Comments Date: 02061991
Comments: Completed RA. Soil sampling of bordering properties and Comments Date: 02061991
Comments: Completed Expedited Response Action. Fenced and posted site.

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City,State,Zip: OAKLEY, CA 94561
Name: COOK BATTERY (OAKLEY BATTERY)
LIENS:

Special Programs Name: Not reported
Special Programs Code: Not reported
Alternate Name: Not reported
Alternate Name: COOK BATTERY (OAKLEY BATTERY)
Alternate Name: COOK BATTERY RECLAMATION
Alternate Name: OAKLEY BATTERY YARD
Alternate Name: BATTERY RECLAMATION BUSINESS
ID Value: P23001
ID Name: BEP DATABASE PCODE
ID Value: 200072
ID Name: CALSTARS CODE
Comments: soil.

Comments Date: 12301988
Comments: Issued I&SE Order & Determination due to high levels of lead in Comments Date: 12301988
Comments: and groundwater.

Comments Date: 12081980
Comments: test soil and groundwater. High levels of lead detected in soil Comments Date: 12081980
Comments: potential contamination. County and DHS (predecessor to DTSC) Comments Date: 12081980
Comments: Site Discovery. County Health Services first notified of Comments Date: 12081980
Comments: Approved Remedial Design for implementation of RAW.

Comments Date: 11301995
Comments: demolished and disposed offsite.

Comments Date: 11231994
Comments: Completed RA. The house located onsite (139 Hill Avenue) was Comments Date: 11231994
Comments: 140 cubic yards of clean fill; installed temporary chip-seal cap.

Comments Date: 10051989
Comments: contaminated soil and battery casings. Imported approximately Comments Date: 10051989
Comments: Completed RA. Removed approximately 315 cubic yards of Comments Date: 10051989
Comments: Conducted enhanced search for potentially responsible parties.

Comments Date: 09301994
Comments: of non-compliance with the Remedial Action Order issued.

Comments Date: 09301989
Comments: Amended RAO to add additional respondent. Final Determination Comments Date: 09301989
Comments: approved.

Comments Date: 08161995
Comments: encapsulation of lead contaminated soil. Negative Declaration Comments Date: 08161995
Comments: Approved RAW for onsite neutralization, consolidation and Comments Date: 08161995
Comments: excavation was backfilled with clean fill.

Comments Date: 08051993
Comments: yards). Sidewall confirmation samples were taken, and Comments Date: 08051993
Comments: battery casings and contaminated soil were removed (40-50 cubic Comments Date: 08051993
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properties to the east. All known contaminated soil from the nearby such as the MacArthur property to the west and the Soto and Provencio Significant contamination was also uncovered on adjacent properties most of the battery salvaging and reclamation operations took place. found in surface soil located behind the garage in areas near where Site. The highest levels of lead on the property, 300,000 ppm, were order to determine the nature and extent of the contamination at the investigations at the Site and its vicinity since September 1988 in (Docket No. HAS 88/89-031). DTSC has conducted extensive 1989, a Remedial Action Order (RAO) was issued for the property with the previous FPO that was issued in September 1988. Then, in May Posted after it discovered that the property owner was non-compliant issued a Determination of Non-Compliance and got the Site Fenced and Endangerment Order to the property owner. In January 1989, DTSC In December 1988, DTSC issued an Imminent and Substantial (FPO) was prepared and presented to the property owner at this time. investigating and cleanup of the property. A Fence and Post Order Substances Control Program), took the lead from CCCHSD for then as the California Department of Health Services, Toxic In September 1988, The Department of Toxic Substances Control (known law. In January 1986, the Site was added to the State Superfund List. concentrations above those considered to be hazardous under state analysis indicated that soil onsite contained high levels of lead at groundwater in the domestic wells onsite. The chemical sample complaint was received. CCCHSD tested the surface soil and made aware of the contamination at the property when a citizen Contra Costa County Health Services Department (CCCHSD) was first exchanged hands between the years of 1974 and 1977. In June 1985, the Properties adjacent to the Cook Battery Site were sold or otherwise activities resulted in the contamination of soil on the Site. or were given to neighbors for use in their leach fields. These landfill, buried onsite (buried battery casings were found onsite), all remaining battery casings were either sent to the Antioch also stored in drums and/or dumped on the property grounds. Any and removed from old batteries and sold as scrap metal. Sulfuric acid was business through the 1950s and 1960s where lead terminals were open field. The Site was used as a battery salvage and reclamation south side of the property (the rear of the property) is bound by an on both east and west sides of the Site and across Hill Avenue. The residential properties situated in an area with occupied residences and other agricultural activities. The Site was comprised of 2 city of Antioch on Highway 4 in a semi-rural area with many orchards Oakley, California, located approximately 6 miles southeast of the Description: The Cook Battery Site is a 1.5 acre residential property parcel in APNS: 033-090-028-3, 033090028
Amount Remaining: Not reported
Lien Amount: $2,249,419.35
Completed: 04/27/2006
Site Type: STATE RESPONSE OR NPL
Site Status: CERTIFIED / OPERATION & MAINTENANCE
Date Satisfied: Not reported
If Satisfied: NO
Project Code: 200072
Project Mgr: CHINH VU
Longitude: -121.69219
Latitude: 37.973910
Envirostor Id: 07360035
COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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disposal of trash found onsite. As of June 6, 2022, a new Pre-HARP vegetation removal activities, fence repairs, Site Security, and the the Site include Annual and 5-Year Review Inspections/Reports, asphalt lot surrounded by a chain link fence. Ongoing activities at unrestricted standards. The property is currently a fully paved regarding the hazardous substances which remain on the property above the amount of $2,249,419.35 was recorded and serves as a deed notice the asphalt cap to elevate the grade. On April 27, 2006, a lien in and the construction of a 3ft retaining wall around the perimeter of drainage-reduce surface water runoff toward surrounding properties, modifications to the asphalt cap grade in order to improve and upgrade of the asphalt cap on the Site. Work included dated May 2005), DTSC contractor ERRG commenced work on the repair 2003, the monitoring wells were abandoned. In March 2005 (Report of the samples ranged from 6.7 to 7.1. As a result, On 17/18 APR sample analysis revealed no detectable concentrations of lead. The pH 6 groundwater monitoring wells at the property were sampled and the inspection and groundwater monitoring were conducted at the Site. All limits. On February 13, 2002, vegetation removal, cap and fence monitoring events revealed no lead concentrations above detection 1997, January 1998, December 1998, and May 2001. The results of the Groundwater monitoring events took place at the Site in February Maintenance activities at the property since January 1997. decontamination of equipment. DTSC has been conducting Operation & included measures taken to monitor and control dust and materials, and a 2-inch asphalt concrete cap. * Site Controls placement, compaction and grading of 6-inch Class II aggregate base compaction, and grading. * Asphalt cap installation which included confirmation soil sampling and analysis for lead and pH, backfilling, included soil excavation in 5 areas and pH adjustments in 2 areas, garage/shed demolition, and debris disposal. * Earthwork, which security, pre-work site survey, site clearing, and grubbing, well decommissioning, setup of facilities, maintenance, and site included the following activities: * Site prep including domestic

2.5%) toward Hill Avenue. The Removal Action at the Cook Battery Site property with a majority of the property at a slight grade (0.4% to weather conditions at the time. The asphalt cap covers the entire and April 18, 1996 and was conducted in 4 phases to accommodate Remedy implementation took place at the Site between October 30, 1995 Class II aggregate base material and a 2-inch asphalt concrete layer. cap. The asphalt cap that was installed consisted of 6-inches of Consolidation, and Encapsulation through the placement of an asphalt The remedy selected for the project was Onsite Neutralization, 16, 1995, A Removal Action Workplan (RAW) was prepared for the Site. of concrete and metal debris were removed from the Site. On August garage. In total, approximately 45 tons of wood debris, and 30 tons garage. A number of abandoned 55-gallon drums were left in the was cleaned, and a water tank was removed from the area east of the at the Site. Fencing was removed from around the house, the garage In February 1994, DTSC demolished an abandoned house that was located and battery casings were removed and disposed from a nearby property and the environment. In 1993, approximately 40cy of contaminated soil conditions at nearby properties did not pose a threat to human health contaminated soil. Confirmation sampling results indicated that the seal on site. This included approximately 1500 cubic yards (cy) of removed and consolidated in the Cook Property and capped with chip properties containing lead above the cleanup level (300 ppm) was COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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CERS Description: Cleanup Program Site
CERS ID: SLT5S1103150
Site ID: 876681
City,State,Zip: OAKLEY, CA
Address: 139 HILL AVENUE
Name: COOKS BATTERY RECLAMATION SITE
CERS:

Reg Id: 07360035
Reg By: CALSI
Facility County Code: 7
Region: CORTESE
City,State,Zip: OAKLEY, CA 94561
edr_fadd1: 139 HILL
edr_fname: COOK BATTERY (OAKLEY BATT
HIST CORTESE:

File Name: Haz Waste & Substances Sites
Waste Management Uit Name: Not reported
Solid Waste Id No: Not reported
WID Id: Not reported
Region 2: Not reported
Effective Date: Not reported
Waste Discharge System No: Not reported
Order No: Not reported
Flag: envirostor
Swat R: Not reported
Enf Type: Not reported
Owner: Not reported
Longitude: -121.69219
Latitude: 37.973910
Site Code: 200072
Status Date: 06/28/2006
Cleanup Status: CERTIFIED / OPERATION & MAINTENANCE
Site/Facility Type: STATE RESPONSE
Global ID: Not reported
Envirostor Id: 7360035
Region: CORTESE
City,State,Zip: OAKLEY, CA 94561
Address: 139 HILL AVENUE
Name: COOK BATTERY (OAKLEY BATTERY)
CORTESE:
time. The information provided above is current as of 24JUL23 by T.A.

Site. A draft Site-Specific Sampling Plan is being finalized at this Cleanup (LABRIC) Program is preparing to conduct sampling at the 2023, DTSC’s Lead-Acid Battery Recycling Facility Investigation and asphalt crack repairs and sealing) effort at the Site. As of July 24, completed cap maintenance (overgrown weeds/vegetation removal, inspection at the Site. In December 2022, DTSC contractor ERRG has to DTSC. PM has gained access and completed a Five-Year Review (FYR) Contractors have since replaced the lock and provided the combination due to the presence of an unknown lock on the access gate. condition of the Site. DTSC was unable to access the Site at first August 2022, a Site Visit was conducted to document the current form was completed and a Site Visit is scheduled for August. In COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
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Affiliation Phone: ,
Affiliation Zip: Not reported
Affiliation Country: Not reported
Affiliation State: CA
Affiliation City: RANCHO CORDOVA
Affiliation Address: 11020 SUN CENTER DRIVE #200
Entity Title: Not reported
Entity Name: zzz - CENTRAL VALLEY RWQCB (REGION 5S)
Affiliation Type Desc: Regional Board Caseworker
Affiliation:

COOK BATTERY (OAKLEY BATTERY) (Continued) S101272690
County Environmental Health Department to assess health risks and conduct perform the site remediation activities. DHS is working with the Contra Costa remediation activities, DHS will find them in noncompliance with the order and unable to comply with the order. If the RPs are unable or unwilling to perform activities. At this time, it appears that the responsible parties will be responsible parties to fence and post the site and perform site remediation Site Activity Status: In June of 1987, a preliminary assessment was completed. DHS will order the lead-contaminated water or inhalation of wind-blown dust.

Potential exposure may result from ingestion of contaminated soil, drinking families. Sampling data indicates contamination of offsite properties.

Threat To Public Health & Env: The site is a residential property located in a neighborhood with many possibly other wastes are buried onsite.

Hazardous Waste Desc: High concentrations of lead are present in surface soils. Battery casings and possibly other wasteswere buried onsite.
lead was removed from discarded automobile batteries. Battery casings and location of a battery reclamation operation in the 1950s and 1960s. Salvageable Site Description: The Cook Battery Reclamation site is a residential property which was the undertake appropriate cost recovery action.
site. If Bond funds are used to investigate and remediate the site, DHS will Project Revenue Source Desc: At this time it appears that Bond funds will be necessary to remediate this Project Revenue Source City,St,Zip: Not reported
Project Revenue Source Addr: Not reported
Project Revenue Source Company: Not reported
Reponsible Party: DETAILED SITE EXPENDITURE PLAN
CA BOND EXP. PLAN:

Date Closed: Not reported
Date Added: Not reported
Report Date: / /
Date Filed: 08/30/95
Lead Agency: DTSC
Pollutant: Pb
Unit: Facility is a Spill or site
Facility Status: Preliminary Assessment
Region: 5
City: Oakley
Address: 139 Hill Ave
Name: Cooks Battery Reclamation Site**
SLIC REG 5:
3624 ft. Site 2 of 2 in cluster B

0.686 mi.

Relative:

Higher
Actual:
42 ft.
1/2-1 OAKLEY, CA 94561
West 139 HILL AVENUE CA BOND EXP. PLAN N/A
B9 COOK BATTERY RECLAMATION (OAKLEY BATTERY) S100833369 CPS-SLIC TC8321160.2s Page 94
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community relations activities.

COOK BATTERY RECLAMATION (OAKLEY BATTERY) (Continued) S100833369 Completed Area Name: PROJECT WIDE
uploaded on 4/29/08.

Comments: Site Screening Completed. Provided as background info. Document Completed Date: 02/20/2000
Completed Document Type: Site Screening
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Completed Info:

Alias Type: Envirostor ID Number
Alias Name: 07010010
Alias Type: Project Code (Site Code)
Alias Name: 204115
Alias Type: Alternate Name
Alias Name: THOMPSON PROPERTY
Alias Type: Alternate Name
Alias Name: KNIGHTSEN ELEM SD-THOMPSON PROPERTY
Alias Type: Alternate Name
Alias Name: KNICHTSEN ELEMENTARY SCHOOL DISTRICT
Potential Description: NONE SPECIFIED
Confirmed COC: NONE SPECIFIED
Potential COC: NONE SPECIFIED
Past Use: AGRICULTURAL - ROW CROPS
APN: NONE SPECIFIED
Longitude: -121.6659
Latitude: 37.9676
Funding: School District
Site Mgmt Req: NONE SPECIFIED
Restricted Use: NO
Special Program: Not reported
Senate: 03
Assembly: 11
Division Branch: Santa Susana Field Laboratory Branch
Supervisor: * Mark Malinowski
Program Manager: Not reported
Lead Agency: SMBRP
Regulatory Agencies: SMBRP
NPL: NO
Acres: 90
Site Type Detailed: School
Site Type: School Cleanup
Site Code: 204115
Status Date: 10/08/2024
Status: Inactive - Withdrawn
Facility ID: 07010010
City,State,Zip: KNIGHTSEN, CA 94513
Address: 1499/1621 DELTA ROAD
Name: THOMPSON PROPERTY
ENVIROSTOR:
4225 ft.

0.800 mi.

Relative:

Higher
Actual:
32 ft.
1/2-1 KNIGHTSEN, CA 94513
SE 1499/1621 DELTA ROAD SCH N/A
10 THOMPSON PROPERTY ENVIROSTOR S116165378
TC8321160.2s Page 95
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Potential COC: NONE SPECIFIED
Past Use: AGRICULTURAL - ROW CROPS
APN: NONE SPECIFIED
Longitude: -121.6659
Latitude: 37.9676
Funding: School District
Restricted Use: NO
Status Date: 10/08/2024
Status: Inactive - Withdrawn
Special Program Status: Not reported
Senate: 03
Assembly: 11
Site Code: 204115
Division Branch: Santa Susana Field Laboratory Branch
Supervisor: * Mark Malinowski
Project Manager: Not reported
Lead Agency Description: DTSC - Site Cleanup Program
Lead Agency: SMBRP
Cleanup Oversight Agencies: SMBRP
National Priorities List: NO
Acres: 90
Site Mgmt. Req.: NONE SPECIFIED
Site Type Detail: School
Site Type: School Cleanup
Facility ID: 07010010
City,State,Zip: KNIGHTSEN, CA 94513
Address: 1499/1621 DELTA ROAD
Name: THOMPSON PROPERTY
SCH:

Schedule Revised Date: Not reported
Schedule Due Date: Not reported
Schedule Document Type: Not reported
Schedule Sub Area Name: Not reported
Schedule Area Name: Not reported
Future Due Date: Not reported
Future Document Type: Not reported
Future Sub Area Name: Not reported
Future Area Name: Not reported
Comments: Not reported
Completed Date: 11/21/2003
Completed Document Type: Cost Recovery Closeout Memo (Confidential) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 04/03/2003
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 03/03/2003
Completed Document Type: Environmental Oversight Agreement Completed Sub Area Name: Not reported
THOMPSON PROPERTY (Continued) S116165378
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Map ID MAP FINDINGS
Direction
Distance EDR ID Number
Elevation Site Database(s) EPA ID Number
Schedule Revised Date: Not reported
Schedule Due Date: Not reported
Schedule Document Type: Not reported
Schedule Sub Area Name: Not reported
Schedule Area Name: Not reported
Future Due Date: Not reported
Future Document Type: Not reported
Future Sub Area Name: Not reported
Future Area Name: Not reported
Comments: Not reported
Completed Date: 11/21/2003
Completed Document Type: Cost Recovery Closeout Memo (Confidential) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 04/03/2003
Completed Document Type: Site Inspections/Visit (Non LUR) Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Comments: Not reported
Completed Date: 03/03/2003
Completed Document Type: Environmental Oversight Agreement Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
uploaded on 4/29/08.

Comments: Site Screening Completed. Provided as background info. Document Completed Date: 02/20/2000
Completed Document Type: Site Screening
Completed Sub Area Name: Not reported
Completed Area Name: PROJECT WIDE
Completed Info:

Alias Type: Envirostor ID Number
Alias Name: 07010010
Alias Type: Project Code (Site Code)
Alias Name: 204115
Alias Type: Alternate Name
Alias Name: THOMPSON PROPERTY
Alias Type: Alternate Name
Alias Name: KNIGHTSEN ELEM SD-THOMPSON PROPERTY
Alias Type: Alternate Name
Alias Name: KNICHTSEN ELEMENTARY SCHOOL DISTRICT
Potential Description: NONE SPECIFIED
Confirmed COC: NONE SPECIFIED
THOMPSON PROPERTY (Continued) S116165378
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ORPHAN SUMMARY
City EDR ID Site Name Site Address Zip Database(s)Count: 1 records.BRENTWOOD S106842886 COWELL RANCH/VINEYARDS AT MARSH CR MARSH CREEK RD/CONCORD AVE CPS-SLIC TC8321160.2s Page 98
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To maintain currency of the following federal and state databases, EDR contacts the appropriate governmental agency on a monthly or quarterly basis, as required.

Number of Days to Update: Provides confirmation that EDR is reporting records that have been updated within 90 days from the date the government agency made the information available to the public.

STANDARD ENVIRONMENTAL RECORDS
Lists of Federal NPL (Superfund) sites
NPL: National Priority List
National Priorities List (Superfund). The NPL is a subset of CERCLIS and identifies over 1,200 sites for priority cleanup under the Superfund Program. NPL sites may encompass relatively large areas. As such, EDR provides polygon coverage for over 1,000 NPL site boundaries produced by EPA’s Environmental Photographic Interpretation Center (EPIC) and regional EPA offices.

Date of Government Version: 03/26/2026
Date Data Arrived at EDR: 04/01/2026
Date Made Active in Reports: 04/21/2026
Number of Days to Update: 20
Source: EPA
Telephone: N/A
Last EDR Contact: 04/01/2026
Next Scheduled EDR Contact: 07/06/2026
Data Release Frequency: Quarterly
NPL Site Boundaries
Sources:

EPA’s Environmental Photographic Interpretation Center (EPIC) Telephone: 202-564-7333
EPA Region 1 EPA Region 6
Telephone 617-918-1143 Telephone: 214-655-6659
EPA Region 3 EPA Region 7
Telephone 215-814-5418 Telephone: 913-551-7247
EPA Region 4 EPA Region 8
Telephone 404-562-8033 Telephone: 303-312-6774
EPA Region 5 EPA Region 9
Telephone 312-886-6686 Telephone: 415-947-4246
EPA Region 10
Telephone 206-553-8665
Proposed NPL: Proposed National Priority List Sites
A site that has been proposed for listing on the National Priorities List through the issuance of a proposed rule in the Federal Register. EPA then accepts public comments on the site, responds to the comments, and places on the NPL those sites that continue to meet the requirements for listing.

Date of Government Version: 03/26/2026
Date Data Arrived at EDR: 04/01/2026
Date Made Active in Reports: 04/21/2026
Number of Days to Update: 20
Source: EPA
Telephone: N/A
Last EDR Contact: 04/01/2026
Next Scheduled EDR Contact: 07/06/2026
Data Release Frequency: Quarterly
NPL LIENS: Federal Superfund Liens
Federal Superfund Liens. Under the authority granted the USEPA by CERCLA of 1980, the USEPA has the authority to file liens against real property in order to recover remedial action expenditures or when the property owner received notification of potential liability. USEPA compiles a listing of filed notices of Superfund Liens.

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473
Date of Government Version: 10/15/1991
Date Data Arrived at EDR: 02/02/1994
Date Made Active in Reports: 03/30/1994
Number of Days to Update: 56
Source: EPA
Telephone: 202-564-4267
Last EDR Contact: 08/15/2011
Next Scheduled EDR Contact: 11/28/2011
Data Release Frequency: No Update Planned
Lists of Federal Delisted NPL sites
Delisted NPL: National Priority List Deletions
The National Oil and Hazardous Substances Pollution Contingency Plan (NCP) establishes the criteria that the EPA uses to delete sites from the NPL. In accordance with 40 CFR 300.425.(e), sites may be deleted from the NPL where no further response is appropriate.

Date of Government Version: 03/26/2026
Date Data Arrived at EDR: 04/01/2026
Date Made Active in Reports: 04/21/2026
Number of Days to Update: 20
Source: EPA
Telephone: N/A
Last EDR Contact: 04/01/2026
Next Scheduled EDR Contact: 07/06/2026
Data Release Frequency: Quarterly
Lists of Federal sites subject to CERCLA removals and CERCLA orders FEDERAL FACILITY: Federal Facility Site Information listing A listing of National Priority List (NPL) and Base Realignment and Closure (BRAC) sites found in the Comprehensive Environmental Response, Compensation and Liability Information System (CERCLIS) Database where EPA Federal Facilities Restoration and Reuse Office is involved in cleanup activities.

Date of Government Version: 12/10/2025
Date Data Arrived at EDR: 12/10/2025
Date Made Active in Reports: 02/12/2026
Number of Days to Update: 64
Source: Environmental Protection Agency
Telephone: 703-603-8704
Last EDR Contact: 03/24/2026
Next Scheduled EDR Contact: 07/06/2026
Data Release Frequency: Varies
SEMS: Superfund Enterprise Management System
SEMS (Superfund Enterprise Management System) tracks hazardous waste sites, potentially hazardous waste sites, and remedial activities performed in support of EPA’s Superfund Program across the United States. The list was formerly know as CERCLIS, renamed to SEMS by the EPA in 2015. The list contains data on potentially hazardous waste sites that have been reported to the USEPA by states, municipalities, private companies and private persons, pursuant to Section 103 of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).

This dataset also contains sites which are either proposed to or on the National Priorities List (NPL) and the sites which are in the screening and assessment phase for possible inclusion on the NPL.

Date of Government Version: 03/26/2026
Date Data Arrived at EDR: 04/01/2026
Date Made Active in Reports: 04/21/2026
Number of Days to Update: 20
Source: EPA
Telephone: 800-424-9346
Last EDR Contact: 04/01/2026
Next Scheduled EDR Contact: 07/20/2026
Data Release Frequency: Quarterly
Lists of Federal CERCLA sites with NFRAP
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SEMS-ARCHIVE (Superfund Enterprise Management System Archive) tracks sites that have no further interest under the Federal Superfund Program based on available information. The list was formerly known as the CERCLIS-NFRAP, renamed to SEMS ARCHIVE by the EPA in 2015. EPA may perform a minimal level of assessment work at a site while it is archived if site conditions change and/or new information becomes available. Archived sites have been removed and archived from the inventory of SEMS sites. Archived status indicates that, to the best of EPA’s knowledge, assessment at a site has been completed and that EPA has determined no further steps will be taken to list the site on the National Priorities List (NPL), unless information indicates this decision was not appropriate or other considerations require a recommendation for listing at a later time. The decision does not necessarily mean that there is no hazard associated with a given site; it only means that. based upon available information, the location is not judged to be potential NPL site.

Date of Government Version: 03/26/2026
Date Data Arrived at EDR: 04/01/2026
Date Made Active in Reports: 04/21/2026
Number of Days to Update: 20
Source: EPA
Telephone: 800-424-9346
Last EDR Contact: 04/01/2026
Next Scheduled EDR Contact: 07/20/2026
Data Release Frequency: Quarterly
Lists of Federal RCRA facilities undergoing Corrective Action CORRACTS: Corrective Action Report
CORRACTS identifies hazardous waste handlers with RCRA corrective action activity.

Date of Government Version: 11/30/2025
Date Data Arrived at EDR: 12/03/2025
Date Made Active in Reports: 12/10/2025
Number of Days to Update: 7
Source: EPA
Telephone: 800-424-9346
Last EDR Contact: 03/17/2026
Next Scheduled EDR Contact: 06/29/2026
Data Release Frequency: Quarterly
Lists of Federal RCRA TSD facilities
RCRA-TSDF: RCRA - Treatment, Storage and Disposal
RCRAInfo is EPA’s comprehensive information system, providing access to data supporting the Resource Conservation and Recovery Act (RCRA) of 1976 and the Hazardous and Solid Waste Amendments (HSWA) of 1984. The database includes selective information on sites which generate, transport, store, treat and/or dispose of hazardous waste as defined by the Resource Conservation and Recovery Act (RCRA). Transporters are individuals or entities that move hazardous waste from the generator offsite to a facility that can recycle, treat, store, or dispose of the waste. TSDFs treat, store, or dispose of the waste.

Date of Government Version: 11/30/2025
Date Data Arrived at EDR: 12/03/2025
Date Made Active in Reports: 12/10/2025
Number of Days to Update: 7
Source: Environmental Protection Agency
Telephone: (415) 495-8895
Last EDR Contact: 03/17/2026
Next Scheduled EDR Contact: 06/29/2026
Data Release Frequency: Quarterly
Lists of Federal RCRA generators
RCRA-LQG: RCRA - Large Quantity Generators
RCRAInfo is EPA’s comprehensive information system, providing access to data supporting the Resource Conservation and Recovery Act (RCRA) of 1976 and the Hazardous and Solid Waste Amendments (HSWA) of 1984. The database includes selective information on sites which generate, transport, store, treat and/or dispose of hazardous waste as defined by the Resource Conservation and Recovery Act (RCRA). Large quantity generators (LQGs) generate over 1,000 kilograms (kg) of hazardous waste, or over 1 kg of acutely hazardous waste per month.

Date of Government Version: 11/30/2025
Date Data Arrived at EDR: 12/03/2025
Date Made Active in Reports: 12/10/2025
Number of Days to Update: 7
Source: Environmental Protection Agency
Telephone: (415) 495-8895
Last EDR Contact: 03/17/2026
Next Scheduled EDR Contact: 06/29/2026
Data Release Frequency: Quarterly
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RCRA-SQG: RCRA - Small Quantity Generators
RCRAInfo is EPA’s comprehensive information system, providing access to data supporting the Resource Conservation and Recovery Act (RCRA) of 1976 and the Hazardous and Solid Waste Amendments (HSWA) of 1984. The database includes selective information on sites which generate, transport, store, treat and/or dispose of hazardous waste as defined by the Resource Conservation and Recovery Act (RCRA). Small quantity generators (SQGs) generate between 100 kg and 1,000 kg of hazardous waste per month.

Date of Government Version: 11/30/2025
Date Data Arrived at EDR: 12/03/2025
Date Made Active in Reports: 12/10/2025
Number of Days to Update: 7
Source: Environmental Protection Agency
Telephone: (415) 495-8895
Last EDR Contact: 03/17/2026
Next Scheduled EDR Contact: 06/29/2026
Data Release Frequency: Quarterly
RCRA-VSQG: RCRA - Very Small Quantity Generators (Formerly Conditionally Exempt Small Quantity Generators) RCRAInfo is EPA’s comprehensive information system, providing access to data supporting the Resource Conservation and Recovery Act (RCRA) of 1976 and the Hazardous and Solid Waste Amendments (HSWA) of 1984. The database includes selective information on sites which generate, transport, store, treat and/or dispose of hazardous waste as defined by the Resource Conservation and Recovery Act (RCRA). Very small quantity generators (VSQGs) generate less than 100 kg of hazardous waste, or less than 1 kg of acutely hazardous waste per month.

Date of Government Version: 11/30/2025
Date Data Arrived at EDR: 12/03/2025
Date Made Active in Reports: 12/10/2025
Number of Days to Update: 7
Source: Environmental Protection Agency
Telephone: (415) 495-8895
Last EDR Contact: 03/17/2026
Next Scheduled EDR Contact: 06/29/2026
Data Release Frequency: Quarterly
Federal institutional controls / engineering controls registries LUCIS: Land Use Control Information System
LUCIS contains records of land use control information pertaining to the former Navy Base Realignment and Closure properties.

Date of Government Version: 03/11/2025
Date Data Arrived at EDR: 04/02/2025
Date Made Active in Reports: 06/24/2025
Number of Days to Update: 83
Source: Department of the Navy
Telephone: 843-820-7326
Last EDR Contact: 01/28/2026
Next Scheduled EDR Contact: 05/18/2026
Data Release Frequency: Varies
US ENG CONTROLS: Engineering Controls Sites List
A listing of sites with engineering controls in place. Engineering controls include various forms of caps, building foundations, liners, and treatment methods to create pathway elimination for regulated substances to enter environmental media or effect human health.

Date of Government Version: 10/30/2025
Date Data Arrived at EDR: 11/11/2025
Date Made Active in Reports: 11/12/2025
Number of Days to Update: 1
Source: Environmental Protection Agency
Telephone: 703-603-0695
Last EDR Contact: 02/17/2026
Next Scheduled EDR Contact: 06/01/2026
Data Release Frequency: Varies
US INST CONTROLS: Institutional Controls Sites List
A listing of sites with institutional controls in place. Institutional controls include administrative measures, such as groundwater use restrictions, construction restrictions, property use restrictions, and post remediation care requirements intended to prevent exposure to contaminants remaining on site. Deed restrictions are generally required as part of the institutional controls.

Date of Government Version: 10/30/2025
Date Data Arrived at EDR: 11/11/2025
Date Made Active in Reports: 11/12/2025
Number of Days to Update: 1
Source: Environmental Protection Agency
Telephone: 703-603-0695
Last EDR Contact: 02/17/2026
Next Scheduled EDR Contact: 06/01/2026
Data Release Frequency: Varies
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Federal ERNS list
ERNS: Emergency Response Notification System
Emergency Response Notification System. ERNS records and stores information on reported releases of oil and hazardous substances.

Date of Government Version: 12/01/2025
Date Data Arrived at EDR: 12/08/2025
Date Made Active in Reports: 02/12/2026
Number of Days to Update: 66
Source: National Response Center, United States Coast Guard Telephone: 202-267-2180
Last EDR Contact: 03/17/2026
Next Scheduled EDR Contact: 06/29/2026
Data Release Frequency: Quarterly
Lists of state- and tribal (Superfund) equivalent sites RESPONSE: State Response Sites
Identifies confirmed release sites where DTSC is involved in remediation, either in a lead or oversight capacity.

These confirmed release sites are generally high-priority and high potential risk.

Date of Government Version: 01/16/2026
Date Data Arrived at EDR: 01/16/2026
Date Made Active in Reports: 04/02/2026
Number of Days to Update: 76
Source: Department of Toxic Substances Control
Telephone: 916-323-3400
Last EDR Contact: 04/21/2026
Next Scheduled EDR Contact: 08/03/2026
Data Release Frequency: Quarterly
Lists of state- and tribal hazardous waste facilities
ENVIROSTOR: EnviroStor Database
The Department of Toxic Substances Control’s (DTSC’s) Site Mitigation and Brownfields Reuse Program’s (SMBRP’s) EnviroStor database identifes sites that have known contamination or sites for which there may be reasons to investigate further. The database includes the following site types: Federal Superfund sites (National Priorities List (NPL)); State Response, including Military Facilities and State Superfund; Voluntary Cleanup; and School sites. EnviroStor provides similar information to the information that was available in CalSites, and provides additional site information, including, but not limited to, identification of formerly-contaminated properties that have been released for reuse, properties where environmental deed restrictions have been recorded to prevent inappropriate land uses, and risk characterization information that is used to assess potential impacts to public health and the environment at contaminated sites.

Date of Government Version: 01/16/2026
Date Data Arrived at EDR: 01/16/2026
Date Made Active in Reports: 04/02/2026
Number of Days to Update: 76
Source: Department of Toxic Substances Control
Telephone: 916-323-3400
Last EDR Contact: 04/21/2026
Next Scheduled EDR Contact: 08/03/2026
Data Release Frequency: Quarterly
Lists of state and tribal landfills and solid waste disposal facilities SWF/LF (SWIS): Solid Waste Information System
Active, Closed and Inactive Landfills. SWF/LF records typically contain an inve ntory of solid waste disposal facilities or landfills. These may be active or i nactive facilities or open dumps that failed to meet RCRA Section 4004 criteria for solid waste landfills or disposal sites.

Date of Government Version: 02/02/2026
Date Data Arrived at EDR: 02/03/2026
Date Made Active in Reports: 04/20/2026
Number of Days to Update: 76
Source: Department of Resources Recycling and Recovery
Telephone: 916-341-6320
Last EDR Contact: 02/03/2026
Next Scheduled EDR Contact: 05/18/2026
Data Release Frequency: Quarterly
Lists of state and tribal leaking storage tanks
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LUST REG 3: Leaking Underground Storage Tank Database
Leaking Underground Storage Tank locations. Monterey, San Benito, San Luis Obispo, Santa Barbara, Santa Cruz counties.

Date of Government Version: 05/19/2003
Date Data Arrived at EDR: 05/19/2003
Date Made Active in Reports: 06/02/2003
Number of Days to Update: 14
Source: California Regional Water Quality Control Board Central Coast Region (3) Telephone: 805-542-4786
Last EDR Contact: 07/18/2011
Next Scheduled EDR Contact: 10/31/2011
Data Release Frequency: No Update Planned
LUST REG 4: Underground Storage Tank Leak List
Los Angeles, Ventura counties. For more current information, please refer to the State Water Resources Control Board’s LUST database.

Date of Government Version: 09/07/2004
Date Data Arrived at EDR: 09/07/2004
Date Made Active in Reports: 10/12/2004
Number of Days to Update: 35
Source: California Regional Water Quality Control Board Los Angeles Region (4) Telephone: 213-576-6710
Last EDR Contact: 09/06/2011
Next Scheduled EDR Contact: 12/19/2011
Data Release Frequency: No Update Planned
LUST: Leaking Underground Fuel Tank Report (GEOTRACKER) Leaking Underground Storage Tank (LUST) Sites included in GeoTracker. GeoTracker is the Water Boards data management system for sites that impact, or have the potential to impact, water quality in California, with emphasis on groundwater.

Date of Government Version: 11/24/2025
Date Data Arrived at EDR: 11/24/2025
Date Made Active in Reports: 02/11/2026
Number of Days to Update: 79
Source: State Water Resources Control Board
Telephone: see region list
Last EDR Contact: 03/03/2026
Next Scheduled EDR Contact: 06/15/2026
Data Release Frequency: Quarterly
LUST REG 7: Leaking Underground Storage Tank Case Listing Leaking Underground Storage Tank locations. Imperial, Riverside, San Diego, Santa Barbara counties.

Date of Government Version: 02/26/2004
Date Data Arrived at EDR: 02/26/2004
Date Made Active in Reports: 03/24/2004
Number of Days to Update: 27
Source: California Regional Water Quality Control Board Colorado River Basin Region (7) Telephone: 760-776-8943
Last EDR Contact: 08/01/2011
Next Scheduled EDR Contact: 11/14/2011
Data Release Frequency: No Update Planned
LUST REG 8: Leaking Underground Storage Tanks
California Regional Water Quality Control Board Santa Ana Region (8). For more current information, please refer to the State Water Resources Control Board’s LUST database.

Date of Government Version: 02/14/2005
Date Data Arrived at EDR: 02/15/2005
Date Made Active in Reports: 03/28/2005
Number of Days to Update: 41
Source: California Regional Water Quality Control Board Santa Ana Region (8) Telephone: 909-782-4496
Last EDR Contact: 08/15/2011
Next Scheduled EDR Contact: 11/28/2011
Data Release Frequency: No Update Planned
LUST REG 6V: Leaking Underground Storage Tank Case Listing Leaking Underground Storage Tank locations. Inyo, Kern, Los Angeles, Mono, San Bernardino counties.

Date of Government Version: 06/07/2005
Date Data Arrived at EDR: 06/07/2005
Date Made Active in Reports: 06/29/2005
Number of Days to Update: 22
Source: California Regional Water Quality Control Board Victorville Branch Office (6) Telephone: 760-241-7365
Last EDR Contact: 09/12/2011
Next Scheduled EDR Contact: 12/26/2011
Data Release Frequency: No Update Planned
LUST REG 9: Leaking Underground Storage Tank Report
Orange, Riverside, San Diego counties. For more current information, please refer to the State Water Resources Control Board’s LUST database.

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Date of Government Version: 03/01/2001
Date Data Arrived at EDR: 04/23/2001
Date Made Active in Reports: 05/21/2001
Number of Days to Update: 28
Source: California Regional Water Quality Control Board San Diego Region (9) Telephone: 858-637-5595
Last EDR Contact: 09/26/2011
Next Scheduled EDR Contact: 01/09/2012
Data Release Frequency: No Update Planned
LUST REG 2: Fuel Leak List
Leaking Underground Storage Tank locations. Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, Solano, Sonoma counties.

Date of Government Version: 09/30/2004
Date Data Arrived at EDR: 10/20/2004
Date Made Active in Reports: 11/19/2004
Number of Days to Update: 30
Source: California Regional Water Quality Control Board San Francisco Bay Region (2) Telephone: 510-622-2433
Last EDR Contact: 09/19/2011
Next Scheduled EDR Contact: 01/02/2012
Data Release Frequency: No Update Planned
LUST REG 1: Active Toxic Site Investigation
Del Norte, Humboldt, Lake, Mendocino, Modoc, Siskiyou, Sonoma, Trinity counties. For more current information, please refer to the State Water Resources Control Board’s LUST database.

Date of Government Version: 02/01/2001
Date Data Arrived at EDR: 02/28/2001
Date Made Active in Reports: 03/29/2001
Number of Days to Update: 29
Source: California Regional Water Quality Control Board North Coast (1) Telephone: 707-570-3769
Last EDR Contact: 08/01/2011
Next Scheduled EDR Contact: 11/14/2011
Data Release Frequency: No Update Planned
LUST REG 6L: Leaking Underground Storage Tank Case Listing For more current information, please refer to the State Water Resources Control Board’s LUST database.

Date of Government Version: 09/09/2003
Date Data Arrived at EDR: 09/10/2003
Date Made Active in Reports: 10/07/2003
Number of Days to Update: 27
Source: California Regional Water Quality Control Board Lahontan Region (6) Telephone: 530-542-5572
Last EDR Contact: 09/12/2011
Next Scheduled EDR Contact: 12/26/2011
Data Release Frequency: No Update Planned
LUST REG 5: Leaking Underground Storage Tank Database
Leaking Underground Storage Tank locations. Alameda, Alpine, Amador, Butte, Colusa, Contra Costa, Calveras, El Dorado, Fresno, Glenn, Kern, Kings, Lake, Lassen, Madera, Mariposa, Merced, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Joaquin, Shasta, Solano, Stanislaus, Sutter, Tehama, Tulare, Tuolumne, Yolo, Yuba counties.

Date of Government Version: 07/01/2008
Date Data Arrived at EDR: 07/22/2008
Date Made Active in Reports: 07/31/2008
Number of Days to Update: 9
Source: California Regional Water Quality Control Board Central Valley Region (5) Telephone: 916-464-4834
Last EDR Contact: 07/01/2011
Next Scheduled EDR Contact: 10/17/2011
Data Release Frequency: No Update Planned
INDIAN LUST R7: Leaking Underground Storage Tanks on Indian Land LUSTs on Indian land in Iowa, Kansas, and Nebraska
Date of Government Version: 11/21/2025
Date Data Arrived at EDR: 12/12/2025
Date Made Active in Reports: 02/19/2026
Number of Days to Update: 69
Source: EPA Region 7
Telephone: 913-551-7003
Last EDR Contact: 04/13/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
INDIAN LUST R5: Leaking Underground Storage Tanks on Indian Land Leaking underground storage tanks located on Indian Land in Michigan, Minnesota and Wisconsin.

Date of Government Version: 11/21/2025
Date Data Arrived at EDR: 12/11/2025
Date Made Active in Reports: 02/19/2026
Number of Days to Update: 70
Source: EPA, Region 5
Telephone: 312-886-7439
Last EDR Contact: 04/13/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
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INDIAN LUST R9: Leaking Underground Storage Tanks on Indian Land LUSTs on Indian land in Arizona, California, New Mexico and Nevada Date of Government Version: 11/21/2025
Date Data Arrived at EDR: 12/11/2025
Date Made Active in Reports: 02/19/2026
Number of Days to Update: 70
Source: Environmental Protection Agency
Telephone: 415-972-3372
Last EDR Contact: 04/13/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
INDIAN LUST R8: Leaking Underground Storage Tanks on Indian Land LUSTs on Indian land in Colorado, Montana, North Dakota, South Dakota, Utah and Wyoming.

Date of Government Version: 11/21/2025
Date Data Arrived at EDR: 12/11/2025
Date Made Active in Reports: 02/19/2026
Number of Days to Update: 70
Source: EPA Region 8
Telephone: 303-312-6271
Last EDR Contact: 04/13/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
INDIAN LUST R6: Leaking Underground Storage Tanks on Indian Land LUSTs on Indian land in New Mexico and Oklahoma.

Date of Government Version: 11/21/2025
Date Data Arrived at EDR: 12/11/2025
Date Made Active in Reports: 02/19/2026
Number of Days to Update: 70
Source: EPA Region 6
Telephone: 214-665-6597
Last EDR Contact: 04/13/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
INDIAN LUST R10: Leaking Underground Storage Tanks on Indian Land LUSTs on Indian land in Alaska, Idaho, Oregon and Washington.

Date of Government Version: 11/21/2025
Date Data Arrived at EDR: 12/11/2025
Date Made Active in Reports: 02/19/2026
Number of Days to Update: 70
Source: EPA Region 10
Telephone: 206-553-2857
Last EDR Contact: 04/13/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
INDIAN LUST R1: Leaking Underground Storage Tanks on Indian Land A listing of leaking underground storage tank locations on Indian Land.

Date of Government Version: 11/21/2025
Date Data Arrived at EDR: 12/11/2025
Date Made Active in Reports: 02/19/2026
Number of Days to Update: 70
Source: EPA Region 1
Telephone: 617-918-1313
Last EDR Contact: 04/13/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
INDIAN LUST R4: Leaking Underground Storage Tanks on Indian Land LUSTs on Indian land in Florida, Mississippi and North Carolina.

Date of Government Version: 11/21/2025
Date Data Arrived at EDR: 12/11/2025
Date Made Active in Reports: 02/19/2026
Number of Days to Update: 70
Source: EPA Region 4
Telephone: 404-562-8677
Last EDR Contact: 04/13/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
CPS-SLIC: Statewide SLIC Cases (GEOTRACKER)
Cleanup Program Sites (CPS; also known as Site Cleanups [SC] and formerly known as Spills, Leaks, Investigations, and Cleanups [SLIC] sites) included in GeoTracker. GeoTracker is the Water Boards data management system for sites that impact, or have the potential to impact, water quality in California, with emphasis on groundwater.

Date of Government Version: 11/24/2025
Date Data Arrived at EDR: 11/24/2025
Date Made Active in Reports: 02/12/2026
Number of Days to Update: 80
Source: State Water Resources Control Board
Telephone: 866-480-1028
Last EDR Contact: 03/03/2026
Next Scheduled EDR Contact: 06/15/2026
Data Release Frequency: Varies
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SLIC REG 1: Active Toxic Site Investigations
The SLIC (Spills, Leaks, Investigations and Cleanup) program is designed to protect and restore water quality from spills, leaks, and similar discharges.

Date of Government Version: 04/03/2003
Date Data Arrived at EDR: 04/07/2003
Date Made Active in Reports: 04/25/2003
Number of Days to Update: 18
Source: California Regional Water Quality Control Board, North Coast Region (1) Telephone: 707-576-2220
Last EDR Contact: 08/01/2011
Next Scheduled EDR Contact: 11/14/2011
Data Release Frequency: No Update Planned
SLIC REG 2: Spills, Leaks, Investigation & Cleanup Cost Recovery Listing The SLIC (Spills, Leaks, Investigations and Cleanup) program is designed to protect and restore water quality from spills, leaks, and similar discharges.

Date of Government Version: 09/30/2004
Date Data Arrived at EDR: 10/20/2004
Date Made Active in Reports: 11/19/2004
Number of Days to Update: 30
Source: Regional Water Quality Control Board San Francisco Bay Region (2) Telephone: 510-286-0457
Last EDR Contact: 09/19/2011
Next Scheduled EDR Contact: 01/02/2012
Data Release Frequency: No Update Planned
SLIC REG 3: Spills, Leaks, Investigation & Cleanup Cost Recovery Listing The SLIC (Spills, Leaks, Investigations and Cleanup) program is designed to protect and restore water quality from spills, leaks, and similar discharges.

Date of Government Version: 05/18/2006
Date Data Arrived at EDR: 05/18/2006
Date Made Active in Reports: 06/15/2006
Number of Days to Update: 28
Source: California Regional Water Quality Control Board Central Coast Region (3) Telephone: 805-549-3147
Last EDR Contact: 07/18/2011
Next Scheduled EDR Contact: 10/31/2011
Data Release Frequency: No Update Planned
SLIC REG 4: Spills, Leaks, Investigation & Cleanup Cost Recovery Listing The SLIC (Spills, Leaks, Investigations and Cleanup) program is designed to protect and restore water quality from spills, leaks, and similar discharges.

Date of Government Version: 11/17/2004
Date Data Arrived at EDR: 11/18/2004
Date Made Active in Reports: 01/04/2005
Number of Days to Update: 47
Source: Region Water Quality Control Board Los Angeles Region (4) Telephone: 213-576-6600
Last EDR Contact: 07/01/2011
Next Scheduled EDR Contact: 10/17/2011
Data Release Frequency: No Update Planned
SLIC REG 5: Spills, Leaks, Investigation & Cleanup Cost Recovery Listing The SLIC (Spills, Leaks, Investigations and Cleanup) program is designed to protect and restore water quality from spills, leaks, and similar discharges.

Date of Government Version: 04/01/2005
Date Data Arrived at EDR: 04/05/2005
Date Made Active in Reports: 04/21/2005
Number of Days to Update: 16
Source: Regional Water Quality Control Board Central Valley Region (5) Telephone: 916-464-3291
Last EDR Contact: 09/12/2011
Next Scheduled EDR Contact: 12/26/2011
Data Release Frequency: No Update Planned
SLIC REG 6V: Spills, Leaks, Investigation & Cleanup Cost Recovery Listing The SLIC (Spills, Leaks, Investigations and Cleanup) program is designed to protect and restore water quality from spills, leaks, and similar discharges.

Date of Government Version: 05/24/2005
Date Data Arrived at EDR: 05/25/2005
Date Made Active in Reports: 06/16/2005
Number of Days to Update: 22
Source: Regional Water Quality Control Board, Victorville Branch Telephone: 619-241-6583
Last EDR Contact: 08/15/2011
Next Scheduled EDR Contact: 11/28/2011
Data Release Frequency: No Update Planned
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481
SLIC REG 6L: SLIC Sites
The SLIC (Spills, Leaks, Investigations and Cleanup) program is designed to protect and restore water quality from spills, leaks, and similar discharges.

Date of Government Version: 09/07/2004
Date Data Arrived at EDR: 09/07/2004
Date Made Active in Reports: 10/12/2004
Number of Days to Update: 35
Source: California Regional Water Quality Control Board, Lahontan Region Telephone: 530-542-5574
Last EDR Contact: 08/15/2011
Next Scheduled EDR Contact: 11/28/2011
Data Release Frequency: No Update Planned
SLIC REG 7: SLIC List
The SLIC (Spills, Leaks, Investigations and Cleanup) program is designed to protect and restore water quality from spills, leaks, and similar discharges.

Date of Government Version: 11/24/2004
Date Data Arrived at EDR: 11/29/2004
Date Made Active in Reports: 01/04/2005
Number of Days to Update: 36
Source: California Regional Quality Control Board, Colorado River Basin Region Telephone: 760-346-7491
Last EDR Contact: 08/01/2011
Next Scheduled EDR Contact: 11/14/2011
Data Release Frequency: No Update Planned
SLIC REG 8: Spills, Leaks, Investigation & Cleanup Cost Recovery Listing The SLIC (Spills, Leaks, Investigations and Cleanup) program is designed to protect and restore water quality from spills, leaks, and similar discharges.

Date of Government Version: 04/03/2008
Date Data Arrived at EDR: 04/03/2008
Date Made Active in Reports: 04/14/2008
Number of Days to Update: 11
Source: California Region Water Quality Control Board Santa Ana Region (8) Telephone: 951-782-3298
Last EDR Contact: 09/12/2011
Next Scheduled EDR Contact: 12/26/2011
Data Release Frequency: No Update Planned
SLIC REG 9: Spills, Leaks, Investigation & Cleanup Cost Recovery Listing The SLIC (Spills, Leaks, Investigations and Cleanup) program is designed to protect and restore water quality from spills, leaks, and similar discharges.

Date of Government Version: 09/10/2007
Date Data Arrived at EDR: 09/11/2007
Date Made Active in Reports: 09/28/2007
Number of Days to Update: 17
Source: California Regional Water Quality Control Board San Diego Region (9) Telephone: 858-467-2980
Last EDR Contact: 08/08/2011
Next Scheduled EDR Contact: 11/21/2011
Data Release Frequency: No Update Planned
Lists of state and tribal registered storage tanks
FEMA UST: Underground Storage Tank Listing
A listing of all FEMA owned underground storage tanks.

Date of Government Version: 06/06/2025
Date Data Arrived at EDR: 08/26/2025
Date Made Active in Reports: 11/12/2025
Number of Days to Update: 78
Source: FEMA
Telephone: 202-646-5797
Last EDR Contact: 03/25/2026
Next Scheduled EDR Contact: 07/13/2026
Data Release Frequency: Varies
MILITARY UST SITES: Military UST Sites (GEOTRACKER)
Military ust sites
Date of Government Version: 11/24/2025
Date Data Arrived at EDR: 11/24/2025
Date Made Active in Reports: 02/11/2026
Number of Days to Update: 79
Source: State Water Resources Control Board
Telephone: 866-480-1028
Last EDR Contact: 03/03/2026
Next Scheduled EDR Contact: 06/15/2026
Data Release Frequency: Varies
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482
UST: Active UST Facilities
Active UST facilities gathered from the local regulatory agencies Date of Government Version: 11/25/2025
Date Data Arrived at EDR: 11/25/2025
Date Made Active in Reports: 02/13/2026
Number of Days to Update: 80
Source: SWRCB
Telephone: 916-341-5851
Last EDR Contact: 03/03/2026
Next Scheduled EDR Contact: 06/15/2026
Data Release Frequency: Semi-Annually
UST CLOSURE: Proposed Closure of Underground Storage Tank (UST) Cases UST cases that are being considered for closure by either the State Water Resources Control Board or the Executive Director have been posted for a 60-day public comment period. UST Case Closures being proposed for consideration by the State Water Resources Control Board. These are primarily UST cases that meet closure criteria under the decisional framework in State Water Board Resolution No. 92-49 and other Board orders. UST Case Closures proposed for consideration by the Executive Director pursuant to State Water Board Resolution No. 2012-0061. These are cases that meet the criteria of the Low-Threat UST Case Closure Policy. UST Case Closure Review Denials and Approved Orders.

Date of Government Version: 11/20/2025
Date Data Arrived at EDR: 11/25/2025
Date Made Active in Reports: 02/13/2026
Number of Days to Update: 80
Source: State Water Resources Control Board
Telephone: 916-327-7844
Last EDR Contact: 03/03/2026
Next Scheduled EDR Contact: 06/15/2026
Data Release Frequency: Varies
AST: Aboveground Petroleum Storage Tank Facilities
A listing of aboveground storage tank petroleum storage tank locations.

Date of Government Version: 07/06/2016
Date Data Arrived at EDR: 07/12/2016
Date Made Active in Reports: 09/19/2016
Number of Days to Update: 69
Source: California Environmental Protection Agency
Telephone: 916-327-5092
Last EDR Contact: 03/04/2026
Next Scheduled EDR Contact: 06/22/2026
Data Release Frequency: Varies
INDIAN UST R6: Underground Storage Tanks on Indian Land The Indian Underground Storage Tank (UST) database provides information about underground storage tanks on Indian land in EPA Region 6 (Louisiana, Arkansas, Oklahoma, New Mexico, Texas and 65 Tribes).

Date of Government Version: 11/21/2025
Date Data Arrived at EDR: 12/11/2025
Date Made Active in Reports: 02/19/2026
Number of Days to Update: 70
Source: EPA Region 6
Telephone: 214-665-7591
Last EDR Contact: 04/13/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
INDIAN UST R9: Underground Storage Tanks on Indian Land The Indian Underground Storage Tank (UST) database provides information about underground storage tanks on Indian land in EPA Region 9 (Arizona, California, Hawaii, Nevada, the Pacific Islands, and Tribal Nations).

Date of Government Version: 11/21/2025
Date Data Arrived at EDR: 12/11/2025
Date Made Active in Reports: 02/19/2026
Number of Days to Update: 70
Source: EPA Region 9
Telephone: 415-972-3368
Last EDR Contact: 04/13/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
INDIAN UST R2: Underground Storage Tanks on Indian Land A listing of underground storage tanks located on Indian Land in Region 2 Date of Government Version: 04/06/2016
Date Data Arrived at EDR: 03/02/2017
Date Made Active in Reports: 04/07/2017
Number of Days to Update: 36
Source: Environmental Protection Agency,
Telephone: 212-637-3668
Last EDR Contact: 04/13/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
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INDIAN UST R7: Underground Storage Tanks on Indian Land The Indian Underground Storage Tank (UST) database provides information about underground storage tanks on Indian land in EPA Region 7 (Iowa, Kansas, Missouri, Nebraska, and 9 Tribal Nations).

Date of Government Version: 11/21/2025
Date Data Arrived at EDR: 12/11/2025
Date Made Active in Reports: 02/19/2026
Number of Days to Update: 70
Source: EPA Region 7
Telephone: 913-551-7003
Last EDR Contact: 04/13/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
INDIAN UST R8: Underground Storage Tanks on Indian Land The Indian Underground Storage Tank (UST) database provides information about underground storage tanks on Indian land in EPA Region 8 (Colorado, Montana, North Dakota, South Dakota, Utah, Wyoming and 27 Tribal Nations).

Date of Government Version: 11/21/2025
Date Data Arrived at EDR: 12/11/2025
Date Made Active in Reports: 02/19/2026
Number of Days to Update: 70
Source: EPA Region 8
Telephone: 303-312-6137
Last EDR Contact: 04/13/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
INDIAN UST R10: Underground Storage Tanks on Indian Land The Indian Underground Storage Tank (UST) database provides information about underground storage tanks on Indian land in EPA Region 10 (Alaska, Idaho, Oregon, Washington, and Tribal Nations).

Date of Government Version: 11/21/2025
Date Data Arrived at EDR: 12/11/2025
Date Made Active in Reports: 02/19/2026
Number of Days to Update: 70
Source: EPA Region 10
Telephone: 206-553-2857
Last EDR Contact: 04/13/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
INDIAN UST R4: Underground Storage Tanks on Indian Land The Indian Underground Storage Tank (UST) database provides information about underground storage tanks on Indian land in EPA Region 4 (Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, Tennessee and Tribal Nations)
Date of Government Version: 11/21/2025
Date Data Arrived at EDR: 12/11/2025
Date Made Active in Reports: 02/19/2026
Number of Days to Update: 70
Source: EPA Region 4
Telephone: 404-562-9424
Last EDR Contact: 04/13/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
INDIAN UST R1: Underground Storage Tanks on Indian Land The Indian Underground Storage Tank (UST) database provides information about underground storage tanks on Indian land in EPA Region 1 (Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont and ten Tribal Nations).

Date of Government Version: 11/21/2025
Date Data Arrived at EDR: 12/11/2025
Date Made Active in Reports: 02/19/2026
Number of Days to Update: 70
Source: EPA, Region 1
Telephone: 617-918-1313
Last EDR Contact: 04/13/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
INDIAN UST R5: Underground Storage Tanks on Indian Land The Indian Underground Storage Tank (UST) database provides information about underground storage tanks on Indian land in EPA Region 5 (Michigan, Minnesota and Wisconsin and Tribal Nations).

Date of Government Version: 11/21/2025
Date Data Arrived at EDR: 12/11/2025
Date Made Active in Reports: 02/19/2026
Number of Days to Update: 70
Source: EPA Region 5
Telephone: 312-886-6136
Last EDR Contact: 04/13/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
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Lists of state and tribal voluntary cleanup sites
INDIAN VCP R1: Voluntary Cleanup Priority Listing
A listing of voluntary cleanup priority sites located on Indian Land located in Region 1.

Date of Government Version: 07/27/2015
Date Data Arrived at EDR: 09/29/2015
Date Made Active in Reports: 02/18/2016
Number of Days to Update: 142
Source: EPA, Region 1
Telephone: 617-918-1102
Last EDR Contact: 12/03/2025
Next Scheduled EDR Contact: 03/30/2026
Data Release Frequency: Varies
VCP: Voluntary Cleanup Program Properties
Contains low threat level properties with either confirmed or unconfirmed releases and the project proponents have request that DTSC oversee investigation and/or cleanup activities and have agreed to provide coverage for DTSC’s costs.

Date of Government Version: 01/16/2026
Date Data Arrived at EDR: 01/16/2026
Date Made Active in Reports: 04/02/2026
Number of Days to Update: 76
Source: Department of Toxic Substances Control
Telephone: 916-323-3400
Last EDR Contact: 04/21/2026
Next Scheduled EDR Contact: 08/03/2026
Data Release Frequency: Quarterly
INDIAN VCP R7: Voluntary Cleanup Priority Lisitng
A listing of voluntary cleanup priority sites located on Indian Land located in Region 7.

Date of Government Version: 03/20/2008
Date Data Arrived at EDR: 04/22/2008
Date Made Active in Reports: 05/19/2008
Number of Days to Update: 27
Source: EPA, Region 7
Telephone: 913-551-7365
Last EDR Contact: 07/08/2021
Next Scheduled EDR Contact: 07/20/2009
Data Release Frequency: Varies
Lists of state and tribal brownfield sites
BROWNFIELDS: Considered Brownfieds Sites Listing
A listing of sites the SWRCB considers to be Brownfields since these are sites have come to them through the MOA Process.

Date of Government Version: 12/08/2025
Date Data Arrived at EDR: 12/08/2025
Date Made Active in Reports: 02/26/2026
Number of Days to Update: 80
Source: State Water Resources Control Board
Telephone: 916-323-7905
Last EDR Contact: 03/17/2026
Next Scheduled EDR Contact: 06/29/2026
Data Release Frequency: Quarterly

ADDITIONAL ENVIRONMENTAL RECORDS
Local Brownfield lists
US BROWNFIELDS: A Listing of Brownfields Sites
Brownfields are real property, the expansion, redevelopment, or reuse of which may be complicated by the presence or potential presence of a hazardous substance, pollutant, or contaminant. Cleaning up and reinvesting in these properties takes development pressures off of undeveloped, open land, and both improves and protects the environment.

Assessment, Cleanup and Redevelopment Exchange System (ACRES) stores information reported by EPA Brownfields grant recipients on brownfields properties assessed or cleaned up with grant funding as well as information on Targeted Brownfields Assessments performed by EPA Regions. A listing of ACRES Brownfield sites is obtained from Cleanups in My Community. Cleanups in My Community provides information on Brownfields properties for which information is reported back to EPA, as well as areas served by Brownfields grant programs.

Date of Government Version: 12/02/2025
Date Data Arrived at EDR: 12/03/2025
Date Made Active in Reports: 02/12/2026
Number of Days to Update: 71
Source: Environmental Protection Agency
Telephone: 202-566-2777
Last EDR Contact: 03/10/2026
Next Scheduled EDR Contact: 06/22/2026
Data Release Frequency: Semi-Annually
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Local Lists of Landfill / Solid Waste Disposal Sites
WMUDS/SWAT: Waste Management Unit Database
Waste Management Unit Database System. WMUDS is used by the State Water Resources Control Board staff and the Regional Water Quality Control Boards for program tracking and inventory of waste management units. WMUDS is composed of the following databases: Facility Information, Scheduled Inspections Information, Waste Management Unit Information, SWAT Program Information, SWAT Report Summary Information, SWAT Report Summary Data, Chapter 15 (formerly Subchapter 15) Information, Chapter 15 Monitoring Parameters, TPCA Program Information, RCRA Program Information, Closure Information, and Interested Parties Information.

Date of Government Version: 04/01/2000
Date Data Arrived at EDR: 04/10/2000
Date Made Active in Reports: 05/10/2000
Number of Days to Update: 30
Source: State Water Resources Control Board
Telephone: 916-227-4448
Last EDR Contact: 04/15/2026
Next Scheduled EDR Contact: 08/03/2026
Data Release Frequency: No Update Planned
SWRCY: Recycler Database
A listing of recycling facilities in California.

Date of Government Version: 11/25/2025
Date Data Arrived at EDR: 11/25/2025
Date Made Active in Reports: 02/13/2026
Number of Days to Update: 80
Source: Department of Conservation
Telephone: 916-323-3836
Last EDR Contact: 03/03/2026
Next Scheduled EDR Contact: 06/15/2026
Data Release Frequency: Quarterly
HAULERS: Registered Waste Tire Haulers Listing
A listing of registered waste tire haulers.

Date of Government Version: 11/13/2025
Date Data Arrived at EDR: 11/17/2025
Date Made Active in Reports: 11/19/2025
Number of Days to Update: 2
Source: Integrated Waste Management Board
Telephone: 916-341-6422
Last EDR Contact: 02/05/2026
Next Scheduled EDR Contact: 05/18/2026
Data Release Frequency: Varies
INDIAN ODI: Report on the Status of Open Dumps on Indian Lands Location of open dumps on Indian land.

Date of Government Version: 12/31/1998
Date Data Arrived at EDR: 12/03/2007
Date Made Active in Reports: 01/24/2008
Number of Days to Update: 52
Source: Environmental Protection Agency
Telephone: 703-308-8245
Last EDR Contact: 04/15/2026
Next Scheduled EDR Contact: 08/03/2026
Data Release Frequency: Varies
ODI: Open Dump Inventory
An open dump is defined as a disposal facility that does not comply with one or more of the Part 257 or Part 258 Subtitle D Criteria.

Date of Government Version: 06/30/1985
Date Data Arrived at EDR: 08/09/2004
Date Made Active in Reports: 09/17/2004
Number of Days to Update: 39
Source: Environmental Protection Agency
Telephone: 800-424-9346
Last EDR Contact: 06/09/2004
Next Scheduled EDR Contact: N/A
Data Release Frequency: No Update Planned
DEBRIS REGION 9: Torres Martinez Reservation Illegal Dump Site Locations A listing of illegal dump sites location on the Torres Martinez Indian Reservation located in eastern Riverside County and northern Imperial County, California.

Date of Government Version: 01/12/2009
Date Data Arrived at EDR: 05/07/2009
Date Made Active in Reports: 09/21/2009
Number of Days to Update: 137
Source: EPA, Region 9
Telephone: 415-947-4219
Last EDR Contact: 04/08/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: No Update Planned
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IHS OPEN DUMPS: Open Dumps on Indian Land
A listing of all open dumps located on Indian Land in the United States.

Date of Government Version: 02/07/2024
Date Data Arrived at EDR: 11/13/2024
Date Made Active in Reports: 11/19/2024
Number of Days to Update: 6
Source: Department of Health & Human Serivces, Indian Health Service Telephone: 301-443-1452
Last EDR Contact: 04/15/2026
Next Scheduled EDR Contact: 08/03/2026
Data Release Frequency: Varies
Local Lists of Hazardous waste / Contaminated Sites
US HIST CDL: National Clandestine Laboratory Register
A listing of clandestine drug lab locations that have been removed from the DEAs National Clandestine Laboratory Register.

Date of Government Version: 04/04/2025
Date Data Arrived at EDR: 06/02/2025
Date Made Active in Reports: 08/12/2025
Number of Days to Update: 71
Source: Drug Enforcement Administration
Telephone: 202-307-1000
Last EDR Contact: 11/20/2025
Next Scheduled EDR Contact: 03/02/2026
Data Release Frequency: No Update Planned
HIST CAL-SITES: Calsites Database
The Calsites database contains potential or confirmed hazardous substance release properties. In 1996, California EPA reevaluated and significantly reduced the number of sites in the Calsites database. No longer updated by the state agency. It has been replaced by ENVIROSTOR.

Date of Government Version: 08/08/2005
Date Data Arrived at EDR: 08/03/2006
Date Made Active in Reports: 08/24/2006
Number of Days to Update: 21
Source: Department of Toxic Substance Control
Telephone: 916-323-3400
Last EDR Contact: 02/23/2009
Next Scheduled EDR Contact: 05/25/2009
Data Release Frequency: No Update Planned
SCH: School Property Evaluation Program
This category contains proposed and existing school sites that are being evaluated by DTSC for possible hazardous materials contamination. In some cases, these properties may be listed in the CalSites category depending on the level of threat to public health and safety or the environment they pose.

Date of Government Version: 01/16/2026
Date Data Arrived at EDR: 01/16/2026
Date Made Active in Reports: 04/02/2026
Number of Days to Update: 76
Source: Department of Toxic Substances Control
Telephone: 916-323-3400
Last EDR Contact: 04/21/2026
Next Scheduled EDR Contact: 08/03/2026
Data Release Frequency: Quarterly
CDL: Clandestine Drug Labs
A listing of drug lab locations. Listing of a location in this database does not indicate that any illegal drug lab materials were or were not present there, and does not constitute a determination that the location either requires or does not require additional cleanup work.

Date of Government Version: 12/31/2024
Date Data Arrived at EDR: 01/27/2026
Date Made Active in Reports: 04/14/2026
Number of Days to Update: 77
Source: Department of Toxic Substances Control
Telephone: 916-255-6504
Last EDR Contact: 01/21/2026
Next Scheduled EDR Contact: 05/11/2026
Data Release Frequency: Varies
CERS HAZ WASTE: California Environmental Reporting System Hazardous Waste List of sites in the California Environmental Protection Agency (CalEPA) Regulated Site Portal which fall under the Hazardous Chemical Management, Hazardous Waste Onsite Treatment, Household Hazardous Waste Collection, Hazardous Waste Generator, and RCRA LQ HW Generator programs.

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Date of Government Version: 01/12/2026
Date Data Arrived at EDR: 01/13/2026
Date Made Active in Reports: 03/19/2026
Number of Days to Update: 65
Source: CalEPA
Telephone: 916-323-2514
Last EDR Contact: 04/16/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Quarterly
TOXIC PITS: Toxic Pits Cleanup Act Sites
Toxic PITS Cleanup Act Sites. TOXIC PITS identifies sites suspected of containing hazardous substances where cleanup has not yet been completed.

Date of Government Version: 07/01/1995
Date Data Arrived at EDR: 08/30/1995
Date Made Active in Reports: 09/26/1995
Number of Days to Update: 27
Source: State Water Resources Control Board
Telephone: 916-227-4364
Last EDR Contact: 01/26/2009
Next Scheduled EDR Contact: 04/27/2009
Data Release Frequency: No Update Planned
US CDL: Clandestine Drug Labs
A listing of clandestine drug lab locations. The U.S. Department of Justice ("the Department") provides this web site as a public service. It contains addresses of some locations where law enforcement agencies reported they found chemicals or other items that indicated the presence of either clandestine drug laboratories or dumpsites.

In most cases, the source of the entries is not the Department, and the Department has not verified the entry and does not guarantee its accuracy. Members of the public must verify the accuracy of all entries by, for example, contacting local law enforcement and local health departments.

Date of Government Version: 04/04/2025
Date Data Arrived at EDR: 06/02/2025
Date Made Active in Reports: 08/12/2025
Number of Days to Update: 71
Source: Drug Enforcement Administration
Telephone: 202-307-1000
Last EDR Contact: 02/19/2026
Next Scheduled EDR Contact: 06/01/2026
Data Release Frequency: Quarterly
Local Lists of Registered Storage Tanks
SWEEPS UST: SWEEPS UST Listing
Statewide Environmental Evaluation and Planning System. This underground storage tank listing was updated and maintained by a company contacted by the SWRCB in the early 1990’s. The listing is no longer updated or maintained.

The local agency is the contact for more information on a site on the SWEEPS list.

Date of Government Version: 06/01/1994
Date Data Arrived at EDR: 07/07/2005
Date Made Active in Reports: 08/11/2005
Number of Days to Update: 35
Source: State Water Resources Control Board
Telephone: N/A
Last EDR Contact: 06/03/2005
Next Scheduled EDR Contact: N/A
Data Release Frequency: No Update Planned
HIST UST: Hazardous Substance Storage Container Database The Hazardous Substance Storage Container Database is a historical listing of UST sites. Refer to local/county source for current data.

Date of Government Version: 10/15/1990
Date Data Arrived at EDR: 01/25/1991
Date Made Active in Reports: 02/12/1991
Number of Days to Update: 18
Source: State Water Resources Control Board
Telephone: 916-341-5851
Last EDR Contact: 07/26/2001
Next Scheduled EDR Contact: N/A
Data Release Frequency: No Update Planned
SAN FRANCISCO AST: Aboveground Storage Tank Site Listing Aboveground storage tank sites
Date of Government Version: 01/27/2026
Date Data Arrived at EDR: 01/27/2026
Date Made Active in Reports: 02/26/2026
Number of Days to Update: 30
Source: San Francisco County Department of Public Health Telephone: 415-252-3896
Last EDR Contact: 01/21/2026
Next Scheduled EDR Contact: 05/11/2026
Data Release Frequency: Varies
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CA FID UST: Facility Inventory Database
The Facility Inventory Database (FID) contains a historical listing of active and inactive underground storage tank locations from the State Water Resource Control Board. Refer to local/county source for current data.

Date of Government Version: 10/31/1994
Date Data Arrived at EDR: 09/05/1995
Date Made Active in Reports: 09/29/1995
Number of Days to Update: 24
Source: California Environmental Protection Agency
Telephone: 916-341-5851
Last EDR Contact: 12/28/1998
Next Scheduled EDR Contact: N/A
Data Release Frequency: No Update Planned
CERS TANKS: California Environmental Reporting System (CERS) Tanks List of sites in the California Environmental Protection Agency (CalEPA) Regulated Site Portal which fall under the Aboveground Petroleum Storage and Underground Storage Tank regulatory programs.

Date of Government Version: 01/12/2026
Date Data Arrived at EDR: 01/13/2026
Date Made Active in Reports: 03/19/2026
Number of Days to Update: 65
Source: California Environmental Protection Agency
Telephone: 916-323-2514
Last EDR Contact: 04/16/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Quarterly
Local Land Records
LIENS: Environmental Liens Listing
A listing of property locations with environmental liens for California where DTSC is a lien holder.

Date of Government Version: 11/20/2025
Date Data Arrived at EDR: 11/20/2025
Date Made Active in Reports: 02/09/2026
Number of Days to Update: 81
Source: Department of Toxic Substances Control
Telephone: 916-323-3400
Last EDR Contact: 03/04/2026
Next Scheduled EDR Contact: 06/08/2026
Data Release Frequency: Varies
LIENS 2: CERCLA Lien Information
A Federal CERCLA (’Superfund’) lien can exist by operation of law at any site or property at which EPA has spent Superfund monies. These monies are spent to investigate and address releases and threatened releases of contamination.

CERCLIS provides information as to the identity of these sites and properties.

Date of Government Version: 03/26/2026
Date Data Arrived at EDR: 04/01/2026
Date Made Active in Reports: 04/21/2026
Number of Days to Update: 20
Source: Environmental Protection Agency
Telephone: 202-564-6023
Last EDR Contact: 04/01/2026
Next Scheduled EDR Contact: 07/06/2026
Data Release Frequency: Semi-Annually
DEED: Deed Restriction Listing
Site Mitigation and Brownfields Reuse Program Facility Sites with Deed Restrictions & Hazardous Waste Management Program Facility Sites with Deed / Land Use Restriction. The DTSC Site Mitigation and Brownfields Reuse Program (SMBRP) list includes sites cleaned up under the program’s oversight and generally does not include current or former hazardous waste facilities that required a hazardous waste facility permit. The list represents deed restrictions that are active. Some sites have multiple deed restrictions. The DTSC Hazardous Waste Management Program (HWMP) has developed a list of current or former hazardous waste facilities that have a recorded land use restriction at the local county recorder’s office. The land use restrictions on this list were required by the DTSC HWMP as a result of the presence of hazardous substances that remain on site after the facility (or part of the facility) has been closed or cleaned up. The types of land use restriction include deed notice, deed restriction, or a land use restriction that binds current and future owners.

Date of Government Version: 11/19/2025
Date Data Arrived at EDR: 11/19/2025
Date Made Active in Reports: 02/04/2026
Number of Days to Update: 77
Source: DTSC and SWRCB
Telephone: 916-323-3400
Last EDR Contact: 02/24/2026
Next Scheduled EDR Contact: 06/08/2026
Data Release Frequency: Semi-Annually
Records of Emergency Release Reports
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HMIRS: Hazardous Materials Information Reporting System Hazardous Materials Incident Report System. HMIRS contains hazardous material spill incidents reported to DOT.

Date of Government Version: 12/07/2025
Date Data Arrived at EDR: 12/08/2025
Date Made Active in Reports: 02/12/2026
Number of Days to Update: 66
Source: U.S. Department of Transportation
Telephone: 202-366-4555
Last EDR Contact: 03/17/2026
Next Scheduled EDR Contact: 06/29/2026
Data Release Frequency: Quarterly
CHMIRS: California Hazardous Material Incident Report System California Hazardous Material Incident Reporting System. CHMIRS contains information on reported hazardous material incidents (accidental releases or spills).

Date of Government Version: 11/30/2025
Date Data Arrived at EDR: 01/08/2026
Date Made Active in Reports: 01/09/2026
Number of Days to Update: 1
Source: Office of Emergency Services
Telephone: 916-845-8400
Last EDR Contact: 04/14/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Semi-Annually
LDS: Land Disposal Sites Listing (GEOTRACKER)
Land Disposal sites (Landfills) included in GeoTracker. GeoTracker is the Water Boards data management system for sites that impact, or have the potential to impact, water quality in California, with emphasis on groundwater.

Date of Government Version: 11/24/2025
Date Data Arrived at EDR: 11/24/2025
Date Made Active in Reports: 02/10/2026
Number of Days to Update: 78
Source: State Water Qualilty Control Board
Telephone: 866-480-1028
Last EDR Contact: 03/03/2026
Next Scheduled EDR Contact: 06/15/2026
Data Release Frequency: Quarterly
MCS: Military Cleanup Sites Listing (GEOTRACKER)
Military sites (consisting of: Military UST sites; Military Privatized sites; and Military Cleanup sites [formerly known as DoD non UST]) included in GeoTracker. GeoTracker is the Water Boards data management system for sites that impact, or have the potential to impact, water quality in California, with emphasis on groundwater.

Date of Government Version: 11/24/2025
Date Data Arrived at EDR: 11/24/2025
Date Made Active in Reports: 02/12/2026
Number of Days to Update: 80
Source: State Water Resources Control Board
Telephone: 866-480-1028
Last EDR Contact: 03/03/2026
Next Scheduled EDR Contact: 06/15/2026
Data Release Frequency: Quarterly
SPILLS 90: SPILLS90 data from FirstSearch
Spills 90 includes those spill and release records available exclusively from FirstSearch databases. Typically, they may include chemical, oil and/or hazardous substance spills recorded after 1990. Duplicate records that are already included in EDR incident and release records are not included in Spills 90.

Date of Government Version: 06/06/2012
Date Data Arrived at EDR: 01/03/2013
Date Made Active in Reports: 02/22/2013
Number of Days to Update: 50
Source: FirstSearch
Telephone: N/A
Last EDR Contact: 01/03/2013
Next Scheduled EDR Contact: N/A
Data Release Frequency: No Update Planned
Other Ascertainable Records
RCRA NonGen / NLR: RCRA - Non Generators / No Longer Regulated RCRAInfo is EPA’s comprehensive information system, providing access to data supporting the Resource Conservation and Recovery Act (RCRA) of 1976 and the Hazardous and Solid Waste Amendments (HSWA) of 1984. The database includes selective information on sites which generate, transport, store, treat and/or dispose of hazardous waste as defined by the Resource Conservation and Recovery Act (RCRA). Non-Generators do not presently generate hazardous waste.

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Date of Government Version: 11/30/2025
Date Data Arrived at EDR: 12/03/2025
Date Made Active in Reports: 12/10/2025
Number of Days to Update: 7
Source: Environmental Protection Agency
Telephone: (415) 495-8895
Last EDR Contact: 03/17/2026
Next Scheduled EDR Contact: 06/29/2026
Data Release Frequency: Quarterly
FUDS: Formerly Used Defense Sites
The listing includes locations of Formerly Used Defense Sites properties where the US Army Corps of Engineers is actively working or will take necessary cleanup actions.

Date of Government Version: 10/22/2025
Date Data Arrived at EDR: 11/06/2025
Date Made Active in Reports: 01/12/2026
Number of Days to Update: 67
Source: U.S. Army Corps of Engineers
Telephone: 202-528-4285
Last EDR Contact: 02/10/2026
Next Scheduled EDR Contact: 05/25/2026
Data Release Frequency: Varies
DOD: Department of Defense Sites
This data set consists of federally owned or administered lands, administered by the Department of Defense, that have any area equal to or greater than 640 acres of the United States, Puerto Rico, and the U.S. Virgin Islands.

Date of Government Version: 06/07/2021
Date Data Arrived at EDR: 07/13/2021
Date Made Active in Reports: 03/09/2022
Number of Days to Update: 239
Source: USGS
Telephone: 888-275-8747
Last EDR Contact: 04/09/2026
Next Scheduled EDR Contact: 07/20/2026
Data Release Frequency: Varies
FEDLAND: Federal and Indian Lands
Federally and Indian administrated lands of the United States. Lands included are administrated by: Army Corps of Engineers, Bureau of Reclamation, National Wild and Scenic River, National Wildlife Refuge, Public Domain Land, Wilderness, Wilderness Study Area, Wildlife Management Area, Bureau of Indian Affairs, Bureau of Land Management, Department of Justice, Forest Service, Fish and Wildlife Service, National Park Service.

Date of Government Version: 04/02/2018
Date Data Arrived at EDR: 04/11/2018
Date Made Active in Reports: 11/06/2019
Number of Days to Update: 574
Source: U.S. Geological Survey
Telephone: 888-275-8747
Last EDR Contact: 03/31/2026
Next Scheduled EDR Contact: 07/13/2026
Data Release Frequency: N/A
SCRD DRYCLEANERS: State Coalition for Remediation of Drycleaners Listing The State Coalition for Remediation of Drycleaners was established in 1998, with support from the U.S. EPA Office of Superfund Remediation and Technology Innovation. It is comprised of representatives of states with established drycleaner remediation programs. Currently the member states are Alabama, Connecticut, Florida, Illinois, Kansas, Minnesota, Missouri, North Carolina, Oregon, South Carolina, Tennessee, Texas, and Wisconsin.

Date of Government Version: 07/30/2021
Date Data Arrived at EDR: 02/03/2023
Date Made Active in Reports: 02/10/2023
Number of Days to Update: 7
Source: Environmental Protection Agency
Telephone: 615-532-8599
Last EDR Contact: 01/29/2026
Next Scheduled EDR Contact: 05/18/2026
Data Release Frequency: Varies
US FIN ASSUR: Financial Assurance Information
All owners and operators of facilities that treat, store, or dispose of hazardous waste are required to provide proof that they will have sufficient funds to pay for the clean up, closure, and post-closure care of their facilities.

Date of Government Version: 12/07/2025
Date Data Arrived at EDR: 12/08/2025
Date Made Active in Reports: 02/05/2026
Number of Days to Update: 59
Source: Environmental Protection Agency
Telephone: 202-566-1917
Last EDR Contact: 03/17/2026
Next Scheduled EDR Contact: 06/29/2026
Data Release Frequency: Quarterly
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EPA WATCH LIST: EPA Watch List
EPA maintains a "Watch List" to facilitate dialogue between EPA, state and local environmental agencies on enforcement matters relating to facilities with alleged violations identified as either significant or high priority. Being on the Watch List does not mean that the facility has actually violated the law only that an investigation by EPA or a state or local environmental agency has led those organizations to allege that an unproven violation has in fact occurred. Being on the Watch List does not represent a higher level of concern regarding the alleged violations that were detected, but instead indicates cases requiring additional dialogue between EPA, state and local agencies - primarily because of the length of time the alleged violation has gone unaddressed or unresolved.

Date of Government Version: 08/30/2013
Date Data Arrived at EDR: 03/21/2014
Date Made Active in Reports: 06/17/2014
Number of Days to Update: 88
Source: Environmental Protection Agency
Telephone: 617-520-3000
Last EDR Contact: 01/28/2026
Next Scheduled EDR Contact: 05/11/2026
Data Release Frequency: No Update Planned
2020 COR ACTION: 2020 Corrective Action Program List
The EPA has set ambitious goals for the RCRA Corrective Action program by creating the 2020 Corrective Action Universe. This RCRA cleanup baseline includes facilities expected to need corrective action. The 2020 universe contains a wide variety of sites. Some properties are heavily contaminated while others were contaminated but have since been cleaned up. Still others have not been fully investigated yet, and may require little or no remediation.

Inclusion in the 2020 Universe does not necessarily imply failure on the part of a facility to meet its RCRA obligations.

Date of Government Version: 09/30/2017
Date Data Arrived at EDR: 05/08/2018
Date Made Active in Reports: 07/20/2018
Number of Days to Update: 73
Source: Environmental Protection Agency
Telephone: 703-308-4044
Last EDR Contact: 01/28/2026
Next Scheduled EDR Contact: 05/11/2026
Data Release Frequency: Varies
TSCA: Toxic Substances Control Act
Toxic Substances Control Act. TSCA identifies manufacturers and importers of chemical substances included on the TSCA Chemical Substance Inventory list. It includes data on the production volume of these substances by plant site.

Date of Government Version: 12/31/2020
Date Data Arrived at EDR: 06/14/2022
Date Made Active in Reports: 03/24/2023
Number of Days to Update: 283
Source: EPA
Telephone: 202-260-5521
Last EDR Contact: 03/12/2026
Next Scheduled EDR Contact: 06/22/2026
Data Release Frequency: Every 4 Years
TRIS: Toxic Chemical Release Inventory System
Toxic Release Inventory System. TRIS identifies facilities which release toxic chemicals to the air, water and land in reportable quantities under SARA Title III Section 313.

Date of Government Version: 12/31/2024
Date Data Arrived at EDR: 11/10/2025
Date Made Active in Reports: 01/29/2026
Number of Days to Update: 80
Source: EPA
Telephone: 202-566-0250
Last EDR Contact: 02/12/2026
Next Scheduled EDR Contact: 05/25/2026
Data Release Frequency: Annually
SSTS: Section 7 Tracking Systems
Section 7 of the Federal Insecticide, Fungicide and Rodenticide Act, as amended (92 Stat. 829) requires all registered pesticide-producing establishments to submit a report to the Environmental Protection Agency by March 1st each year. Each establishment must report the types and amounts of pesticides, active ingredients and devices being produced, and those having been produced and sold or distributed in the past year.

Date of Government Version: 01/12/2026
Date Data Arrived at EDR: 01/13/2026
Date Made Active in Reports: 03/05/2026
Number of Days to Update: 51
Source: EPA
Telephone: 202-564-4203
Last EDR Contact: 04/14/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Annually
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ROD: Records Of Decision
Record of Decision. ROD documents mandate a permanent remedy at an NPL (Superfund) site containing technical and health information to aid in the cleanup.

Date of Government Version: 01/30/2026
Date Data Arrived at EDR: 02/02/2026
Date Made Active in Reports: 02/12/2026
Number of Days to Update: 10
Source: EPA
Telephone: 703-416-0223
Last EDR Contact: 04/01/2026
Next Scheduled EDR Contact: 06/08/2026
Data Release Frequency: Annually
RMP: Risk Management Plans
When Congress passed the Clean Air Act Amendments of 1990, it required EPA to publish regulations and guidance for chemical accident prevention at facilities using extremely hazardous substances. The Risk Management Program Rule (RMP Rule) was written to implement Section 112(r) of these amendments. The rule, which built upon existing industry codes and standards, requires companies of all sizes that use certain flammable and toxic substances to develop a Risk Management Program, which includes a(n): Hazard assessment that details the potential effects of an accidental release, an accident history of the last five years, and an evaluation of worst-case and alternative accidental releases; Prevention program that includes safety precautions and maintenance, monitoring, and employee training measures; and Emergency response program that spells out emergency health care, employee training measures and procedures for informing the public and response agencies (e.g the fire department) should an accident occur.

Date of Government Version: 01/01/2026
Date Data Arrived at EDR: 01/14/2026
Date Made Active in Reports: 01/22/2026
Number of Days to Update: 8
Source: Environmental Protection Agency
Telephone: 202-564-8600
Last EDR Contact: 04/08/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Varies
RAATS: RCRA Administrative Action Tracking System
RCRA Administration Action Tracking System. RAATS contains records based on enforcement actions issued under RCRA pertaining to major violators and includes administrative and civil actions brought by the EPA. For administration actions after September 30, 1995, data entry in the RAATS database was discontinued. EPA will retain a copy of the database for historical records. It was necessary to terminate RAATS because a decrease in agency resources made it impossible to continue to update the information contained in the database.

Date of Government Version: 04/17/1995
Date Data Arrived at EDR: 07/03/1995
Date Made Active in Reports: 08/07/1995
Number of Days to Update: 35
Source: EPA
Telephone: 202-564-4104
Last EDR Contact: 06/02/2008
Next Scheduled EDR Contact: 09/01/2008
Data Release Frequency: No Update Planned
PRP: Potentially Responsible Parties
A listing of verified Potentially Responsible Parties
Date of Government Version: 06/26/2025
Date Data Arrived at EDR: 07/01/2025
Date Made Active in Reports: 07/29/2025
Number of Days to Update: 28
Source: EPA
Telephone: 202-564-6023
Last EDR Contact: 04/01/2026
Next Scheduled EDR Contact: 05/11/2026
Data Release Frequency: Quarterly
PADS: PCB Activity Database System
PCB Activity Database. PADS Identifies generators, transporters, commercial storers and/or brokers and disposers of PCB’s who are required to notify the EPA of such activities.

Date of Government Version: 08/12/2025
Date Data Arrived at EDR: 09/30/2025
Date Made Active in Reports: 11/24/2025
Number of Days to Update: 55
Source: EPA
Telephone: 202-566-0500
Last EDR Contact: 03/04/2026
Next Scheduled EDR Contact: 07/13/2026
Data Release Frequency: Annually
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ICIS: Integrated Compliance Information System
The Integrated Compliance Information System (ICIS) supports the information needs of the national enforcement and compliance program as well as the unique needs of the National Pollutant Discharge Elimination System (NPDES) program.

Date of Government Version: 11/18/2016
Date Data Arrived at EDR: 11/23/2016
Date Made Active in Reports: 02/10/2017
Number of Days to Update: 79
Source: Environmental Protection Agency
Telephone: 202-564-2501
Last EDR Contact: 09/23/2025
Next Scheduled EDR Contact: 01/12/2026
Data Release Frequency: Quarterly
FTTS: FIFRA/ TSCA Tracking System - FIFRA (Federal Insecticide, Fungicide, & Rodenticide Act)/TSCA (Toxic Substances Control Act) FTTS tracks administrative cases and pesticide enforcement actions and compliance activities related to FIFRA, TSCA and EPCRA (Emergency Planning and Community Right-to-Know Act). To maintain currency, EDR contacts the Agency on a quarterly basis.

Date of Government Version: 04/09/2009
Date Data Arrived at EDR: 04/16/2009
Date Made Active in Reports: 05/11/2009
Number of Days to Update: 25
Source: EPA/Office of Prevention, Pesticides and Toxic Substances Telephone: 202-566-1667
Last EDR Contact: 08/18/2017
Next Scheduled EDR Contact: 12/04/2017
Data Release Frequency: No Update Planned
FTTS INSP: FIFRA/ TSCA Tracking System - FIFRA (Federal Insecticide, Fungicide, & Rodenticide Act)/TSCA (Toxic Substances Control Act) A listing of FIFRA/TSCA Tracking System (FTTS) inspections and enforcements.

Date of Government Version: 04/09/2009
Date Data Arrived at EDR: 04/16/2009
Date Made Active in Reports: 05/11/2009
Number of Days to Update: 25
Source: EPA
Telephone: 202-566-1667
Last EDR Contact: 08/18/2017
Next Scheduled EDR Contact: 12/04/2017
Data Release Frequency: No Update Planned
MLTS: Material Licensing Tracking System
MLTS is maintained by the Nuclear Regulatory Commission and contains a list of approximately 8,100 sites which possess or use radioactive materials and which are subject to NRC licensing requirements. To maintain currency, EDR contacts the Agency on a quarterly basis.

Date of Government Version: 01/26/2026
Date Data Arrived at EDR: 01/27/2026
Date Made Active in Reports: 02/25/2026
Number of Days to Update: 29
Source: Nuclear Regulatory Commission
Telephone: 301-415-0717
Last EDR Contact: 04/08/2026
Next Scheduled EDR Contact: 07/27/2026
Data Release Frequency: Quarterly
COAL ASH DOE: Steam-Electric Plant Operation Data
A listing of power plants that store ash in surface ponds.

Date of Government Version: 12/31/2024
Date Data Arrived at EDR: 11/19/2025
Date Made Active in Reports: 01/29/2026
Number of Days to Update: 71
Source: Department of Energy
Telephone: 202-586-8719
Last EDR Contact: 02/20/2026
Next Scheduled EDR Contact: 06/08/2026
Data Release Frequency: Varies
COAL ASH EPA: Coal Combustion Residues Surface Impoundments List A listing of coal combustion residues surface impoundments with high hazard potential ratings.

Date of Government Version: 01/12/2017
Date Data Arrived at EDR: 03/05/2019
Date Made Active in Reports: 11/11/2019
Number of Days to Update: 251
Source: Environmental Protection Agency
Telephone: N/A
Last EDR Contact: 02/20/2026
Next Scheduled EDR Contact: 06/08/2026
Data Release Frequency: Varies
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PCB TRANSFORMER: PCB Transformer Registration Database
The database of PCB transformer registrations that includes all PCB registration submittals.

Date of Government Version: 09/13/2019
Date Data Arrived at EDR: 11/06/2019
Date Made Active in Reports: 02/10/2020
Number of Days to Update: 96
Source: Environmental Protection Agency
Telephone: 202-566-0517
Last EDR Contact: 01/29/2026
Next Scheduled EDR Contact: 05/11/2026
Data Release Frequency: Varies
RADINFO: Radiation Information Database
The Radiation Information Database (RADINFO) contains information about facilities that are regulated by U.S.

Environmental Protection Agency (EPA) regulations for radiation and radioactivity.

Date of Government Version: 07/01/2019
Date Data Arrived at EDR: 07/01/2019
Date Made Active in Reports: 09/23/2019
Number of Days to Update: 84
Source: Environmental Protection Agency
Telephone: 202-343-9775
Last EDR Contact: 03/18/2026
Next Scheduled EDR Contact: 07/06/2026
Data Release Frequency: Quarterly
HIST FTTS: FIFRA/TSCA Tracking System Administrative Case Listing A complete administrative case listing from the FIFRA/TSCA Tracking System (FTTS) for all ten EPA regions. The information was obtained from the National Compliance Database (NCDB). NCDB supports the implementation of FIFRA (Federal Insecticide, Fungicide, and Rodenticide Act) and TSCA (Toxic Substances Control Act). Some EPA regions are now closing out records. Because of that, and the fact that some EPA regions are not providing EPA Headquarters with updated records, it was decided to create a HIST FTTS database. It included records that may not be included in the newer FTTS database updates. This database is no longer updated.

Date of Government Version: 10/19/2006
Date Data Arrived at EDR: 03/01/2007
Date Made Active in Reports: 04/10/2007
Number of Days to Update: 40
Source: Environmental Protection Agency
Telephone: 202-564-2501
Last EDR Contact: 12/17/2007
Next Scheduled EDR Contact: 03/17/2008
Data Release Frequency: No Update Planned
HIST FTTS INSP: FIFRA/TSCA Tracking System Inspection & Enforcement Case Listing A complete inspection and enforcement case listing from the FIFRA/TSCA Tracking System (FTTS) for all ten EPA regions. The information was obtained from the National Compliance Database (NCDB). NCDB supports the implementation of FIFRA (Federal Insecticide, Fungicide, and Rodenticide Act) and TSCA (Toxic Substances Control Act). Some EPA regions are now closing out records. Because of that, and the fact that some EPA regions are not providing EPA Headquarters with updated records, it was decided to create a HIST FTTS database. It included records that may not be included in the newer FTTS database updates. This database is no longer updated.

Date of Government Version: 10/19/2006
Date Data Arrived at EDR: 03/01/2007
Date Made Active in Reports: 04/10/2007
Number of Days to Update: 40
Source: Environmental Protection Agency
Telephone: 202-564-2501
Last EDR Contact: 12/17/2008
Next Scheduled EDR Contact: 03/17/2008
Data Release Frequency: No Update Planned
DOT OPS: Incident and Accident Data
Department of Transporation, Office of Pipeline Safety Incident and Accident data.

Date of Government Version: 12/31/2025
Date Data Arrived at EDR: 01/20/2026
Date Made Active in Reports: 03/05/2026
Number of Days to Update: 44
Source: Department of Transporation, Office of Pipeline Safety Telephone: 202-366-4595
Last EDR Contact: 04/21/2026
Next Scheduled EDR Contact: 08/03/2026
Data Release Frequency: Quarterly
CONSENT: Superfund (CERCLA) Consent Decrees
Major legal settlements that establish responsibility and standards for cleanup at NPL (Superfund) sites. Released periodically by United States District Courts after settlement by parties to litigation matters.