Santa Maria City Council
October 21, 2025

series, to accommodate a maximum flow of 1,000 cfm prior to discharge to the atmosphere in accordance with Air District permit requirements.

3.5 Air Emissions Controls
Extracted vapors will be treated through VGAC filters to reduce the COCs and meet the requirements of the Air District permit. Sampling will be conducted on a regular basis from influent and effluent sampling ports to determine mass removal and emissions quantities in accordance with applicable permit requirements. If the SVE system vapor treatment does not meet permit requirements, vapor extraction will be temporarily stopped, and the treatment system will be adjusted to meet the permit requirements, as necessary.

Air District permit application forms are included in Appendix D. Preliminary estimated VOC emissions are provided in Table 4.

3.6 Contingencies

3.6.1 Groundwater
Moisture extracted as part of SVE system operation will be separated from the vapor prior to treatment and stored in a holding tank, as needed. The design is predicated on the perched groundwater zone not being temporally continuous based on well gauging information from 2021. Perched groundwater levels may fluctuate significantly with precipitation with increases in the rainy season (approximately October — March) and decreases in the dry season (approximately April — September) and therefore extraction is not intended to occur continuously during SVE implementation. The wellhead connections for the SVE system will also allow for the installation of a submersible pump for groundwater extraction, if needed during periods of groundwater infiltration in the area (e.g., during and following the rainy season). If submersible pumps are used, the extracted groundwater will be treated using bag filters to remove fines, as needed, and liquid phase GAC vessels of adequate capacity placed in series. The existing water treatment system will be visually assessed prior to groundwater treatment and might be retrofitted, if possible and, as needed, to adequately treat the groundwater prior to discharge in accordance with applicable permits. If the existing water treatment system is no longer viable, a new system will be installed.

Treated water will be discharged to the sewer system under an industrial wastewater discharge permit through the City of Santa Maria. Sampling will be conducted from influent and effluent sampling ports per discharge permit requirements. If effluent does not meet permit requirements, discharge will be temporarily stopped and the treatment system will be adjusted to meet permit requirements, as necessary. SVE system operation may continue while the groundwater treatment system is paused pending adequate space in the LANGAN

Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
Attachment B
22 September 2025
781016901

groundwater storage tanks. A permit application for sewer discharge from an industrial facility is included in Appendix D.

3.6.1.1 Baseline Groundwater Sampling
In accordance with the Settlement Agreement and the Offsite and Onsite Groundwater Characterization Work Plan, September 2025, baseline groundwater samples and depth to groundwater measurements will be collected from shallow/perched groundwater monitoring wells (MW -1 through MW -16). The depth to water measurements will be used to verify groundwater presence and quantity and anticipated VOC concentrations requiring treatment. Additionally, as required, a groundwater sample will be analyzed for the constituents outlined in the City of Santa Maria industrial wastewater discharge permit.

3.6.1.2 Extracted Groundwater Influent and Effluent
As needed, groundwater influent (untreated) and effluent (treated) will be analyzed for constituents outlined by the discharge permit requirements and COCs and evaluated to estimate mass removal of the groundwater treatment system. If quantities are low enough, groundwater may be containerized, sampled for waste characterization, and appropriately disposed of instead of treating and discharging to the sewer.

3.6.2 Potential Short Circuiting
Cracked pavement and existing groundwater extraction wells might provide preferential pathways for ambient air to travel into the subsurface and allow short-circuiting, reducing the vacuum for nearby soil vapor extraction wells. While the extraction wells are designed to prevent flow from ambient air from the immediate surrounding area, the radius of capture will extend past the well box and is therefore influenced by existing wells and the surrounding pavement. Startup testing results will be reviewed, and the conditions within the target treatment capture area assessed. If preferential pathways are identified that could allow the extraction wells to pull ambient air and reduce the vacuum in the subsurface, the pavement will be sealed. Existing extraction wells will be fitted with new, locking expansion caps, as needed, based on existing conditions.

3.6.3 Location and Elevation Survey
If groundwater accumulates and must be extracted and treated prior to discharge, the affected wells will be surveyed by a California -licensed Professional Land Surveyor. Vertical and horizontal locations, including sampling ports, outlets, and ground surface elevation, will be measured in accordance with the State of California's GeoTracker (GeoTracker) requirements. Following completion of installation and surveying, the survey data will be uploaded to the GeoTracker Electronic Submittal of Information (ESI) system.

LANGAN

Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
Attachment B
22 September 2025
781016901

3.6.4 Site Power Suooly Evaluation
SVE systems are generally considered energy -intensive and require industrial -level Site power supply. Prior to implementation, the Site power supply will be evaluated to ensure access to an energy system with the capacity to run the system continuously. The Pacific Gas & Electric Company (PG&E) supplies the energy service to Santa Maria and will be contacted, as needed, to confirm the capacity of the current energy system.

Due to the Site location within a heavily industrial area, it is likely that the energy service is within the required range. In the event the power draw is greater than the system's current capacity, alternative lower -energy systems may need to be considered as a new power supply drop or transformer from PG&E generally has a lead time of over a year.

3.7 System Telemetry Requirements
Wireless telemetry will be used to provide real-time alarms, including blower status, groundwater storage tank level, vacuum levels, and/or pressure sensors on the groundwater treatment system. The use of the remote telemetry will allow for reduced system downtime.

3.8 Waste Management
Spent GAC media will be transported for offsite recycling or disposal at an approved facility. Documentation for the recycling or disposal of the spent GAC media will be provided in the Semi -Annual SVE Progress Report and/or SVE Completion Report, depending on timing.

4.0 SVE OPERATION, MAINTENANCE AND MONITORING

4.1 SVE Startup Testing
The objective of the SVE startup testing is to refine system parameters and optimize effectiveness of the system. The startup testing will be focused to address the area of highest observed soil vapor concentrations.

Testing for the SVE system will be performed for up to two weeks to refine the system operation as needed.

The SVE system will operate for up to 24 hours a day and be monitored by field technicians from the SVE system manufacturer with oversight from Langan personnel. Startup testing may include field monitoring, performing stepped rate and constant rate vacuum tests, and sampling.

System operating parameters including temperature, vacuum, influent flow (cfm), applied well -head vacuum, and vacuum at observation wells will be recorded at least three times per day during system startup operation. Total VOC concentrations will be measured in the field using a PI D.

LANGAN

Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
Attachment B
22 September 2025
781016901

4.1.1 Startuo Phase Groundwater Levels
Prior to startup testing water levels will be gauged at monitoring wells (Figure 2) to verify the lack of or depth of perched groundwater on the Site and in the SVE implementation area. If present, potential groundwater removal will be managed as indicated in Section 3.6.1.

4.1.2 Sam
oling
During startup testing, soil vapor sampling will be conducted to document initial COC concentrations as a baseline from which to evaluate SVE effectiveness and to optimize mass removal and achieve treatment requirements in accordance with Air District permits.

4.1.2.1 Baseline Soil Vapor Sampling
Baseline soil vapor samples will be collected from the six soil vapor probes and five SVE wells intended for SVE performance monitoring within the SVE target treatment zone:
• SV8
• SV11
• SV12
• SV15
• SV16
• SV17
• SVE-1
• SVE-3
• SVE-5
• SVE-6
• SVE-8
Samples from soil vapor probes will be collected using 1 -liter laboratory -supplied summa canisters and flow controllers while using a sealed shroud to facilitate leak testing. Soil vapor probes will be purged of three times their volume prior to sampling in accordance with the California Department of Toxic Substances Control's (DTSC) Active Soil Gas Advisory. A leak tracer gas, such as helium, will be used to confirm leakage does not occur during sampling. A known concentration of the tracer gas (about 20% to 30% helium by volume) will be added inside the shroud and maintained at this concentration during sampling. Tracer gas concentrations within the soil vapor samples will be tested at the laboratory to verify the quality of the field sampling. In addition to laboratory testing, a tracer gas monitoring device will be used to evaluate leakage occurring in real time by testing the sample train following purging and sample collection. Soil vapor samples from SVE wells will be collected in tedlar bags using a soil vapor pump or in 1 -liter laboratory supplied summa canisters with flow controllers. SVE wells will be fitted with a temporary sampling port to facilitate sample collection.

Samples will be submitted under chain of custody protocol to a State of California Environmental Laboratory Accreditation Program (ELAP)-certified laboratory and analyzed for VOCs by USEPA Method TO -15. Soil vapor samples from soil vapor probes will additionally be analyzed for helium by ASTM Method D1946 if helium was used as the tracer gas, as applicable.

LANGAN

Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
Attachment B
22 September 2025
781016901

4.1.2.2 SVE Vapor Influent and Effluent
Soil vapor samples from the SVE system will be collected from the wellhead or blower inlet for the five SVE wells intended for SVE performance monitoring (SVE-1, SVE-3, SVE-5, SVE-6, SVE-8) during the initial field monitoring, periodically during operation, and just before system rebound testing and shutdown. Samples will also be collected from the blower inlet, at a sampling port between GAC vessels, and from an effluent sampling port from the soil vapor treatment system at a minimum at initial startup and just before system rebound testing and shutdown. These samples will also be collected periodically based on PID monitoring results and in accordance with the Air District Permit to better understand the SVE treatment system operation.

Soil vapor samples will be collected into tedlar bags or 1 -liter summa canisters, submitted under chain of custody protocol to a State of California ELAP-certified laboratory, and analyzed for VOCs by USEPA Method TO -15.

4.1.3 Construction Com
uletion Re
wort
Following installation of the SVE, the Agencies will prepare a SVE Construction Completion Report. The SVE Construction Completion Report will include a summary of the soil vapor monitoring locations, well box installation, final design plans, boring logs, SVE well construction logs, SVE startup activities, treatment system specifications, and describe construction activities. The report will be signed and certified by a Professional Geologist and/or Professional Engineer registered in the State of California.

4.2 Performance Monitoring
Per Table 1 of the Settlement Agreement the Agencies will complete monthly maintenance and four semi-annual monitoring events to assess the performance of the SVE system during operation. Quality control samples will be collected using a PID from various sampling ports on the SVE system, such as the blower inlet and VGAC outlet, and soil vapor monitoring samples will be collected from existing vapor probes or SVE wellheads.

The results of performance monitoring and quality control sampling for the SVE system will be included in the Semi -Annual progress reports. Reports will be completed for as long as the system is in operation and submitted by April 30th for the operating period of October to March and by October 31St for the operating period of April to September, per Exhibit A of the Settlement Agreement.

LANGAN

Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
Attachment B
22 September 2025
781016901

4.3 Remedial Goals, SVE Discontinuation, and Contingency VMS Per the Settlement Agreement, the agencies shall operate the SVE system until one of the following remedial goals is reached:
• TCE concentrations in soil vapor have reduced to a concentration of 3,000 pg/m3 and corresponding human health vapor intrusion risk level of 1 x 10' I LCR (based on an attenuation factor of 0.01); or • If the first remedial goal (1) is not met, the SVE system has operated for two (2) years (and accounting for any SVE System Interruptions as set forth in the Settlement Agreement), and TCE concentrations have reduced to a concentration of 30,000 µg/m3or less and based on a risk level of 1 x 104 ILCR; then the remedial goal shall be achieved by installation of a VMS at the former SEMCO building. After installation, the SVE system, including VMS, shall be owned and the responsibility of the current owner of the SEMCO Property.

Following the completion of SVE system operation, soil vapor monitoring will be conducted following a suitable rebound period based on the site -specific conditions and findings from post -shutdown vapor sampling at weekly intervals until concentrations are stabilized or can be used to estimate rebound time constants (DTSC, 2011). Remedial goals will be compared to the 95% UCL of the mean soil vapor concentrations, calculated using data from existing soil vapor probes SV8, SV11, SV12, SV15, SV16, and SV17 and five of the SVE wells that will be installed/utilized for SVE remediation SVE-1, SVE-3, SVE-5, SVE-6, and SVE-8 (Figure 6), per the Settlement Agreement.

If determined necessary based on the risk evaluation, a VMS may be required for the SEMCO building. If required, the perforated pipe installed beneath the SEMCO building will be connected to a riser, the installed inlet vent will be uncapped, and a radon fan will be installed on the riser and operated by the building owner as outlined in Appendix E. A VMS basis of design schematic is attached as Appendix E.

Once the SVE meets the remedial goals described above, the system will be discontinued, and the Agencies will submit a SVE Completion Report to the CCRWQCB. The SVE Completion Report will include final monitoring data, removal of SVE media onsite, and abandonment of the SVE wells.

LANGAN

Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
Attachment B
22 September 2025
781016901

5.0 QUALITY ASSURANCE/ QUALITY CONTROL
The Quality Assurance / Quality Control (QA / QC) procedures will be utilized in both sample collection and chemical analyses. The purpose of the QA/QC procedures is to ensure the reliability and validity of data generated during the monitoring events described in this work plan. QC samples will be collected during field activities, including field duplicate(s), an equipment blank, and a trip blank sample.

5.1 Field QA / QC Procedures
Field QA/QC procedures will be performed during sampling activities and will consist of the following measures:
• Chain of custody records will be used to document sample collection and will be submitted to the laboratory performing the chemical analyses. A chain of custody record will accompany all samples submitted for chemical analyses; and
• Daily information regarding sample collection will be recorded in field logs, including sample type(s), description, sample identification number(s), and sample time(s).

Field QA/QC samples will be collected and submitted for chemical analyses along with the samples, and will including the following:
• Field Duplicate Sample: One duplicate sample will be collected at a rate of once per sampling event or 10%, whichever is greater, and analyzed to evaluate the analytical procedures and methods employed by the laboratory. The duplicate sample will be collected concurrently with its parent sample and will be submitted for VOCs analysis.
• Equipment Blank Sample: One equipment blank sample will be collected per sampling day during the baseline groundwater sampling event to determine the efficacy of decontamination procedures for sampling equipment and will be collected when disposable or dedicated sampling equipment is not used. The equipment blank sample will consist of deionized water poured over or pumped through the decontaminated sampling equipment, and collection of the rinsate into the appropriate sample containers. The equipment blank sample will be submitted for VOCs analysis. • Trip Blank Sample: One trip blank sample will be submitted and analyzed per sampling event that includes water VOC analysis. The trip blank water sample will consist of a sample of deionized water provided by the laboratory and stored with the water VOC samples collected during each day of field activities. The purpose of the trip blank sample is to evaluate the potential for cross -contamination of LANGAN

Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
Attachment B
22 September 2025
781016901

aqueous VOC samples during handling. The trip blank sample(s) will be handled in the same manner as all other samples and submitted for VOCs analysis.

5.2 Laboratory QA / QC Procedures
Laboratory QA / QC procedures include the following:
• Chemical analyses will be performed within the required holding time for all samples chemically analyzed, and
• A State of California ELAP-certified laboratory will conduct the required analyses.

The laboratory will provide the following information for each sample:
• Method blank data;
• Surrogate recovery, instrument tuning, and calibration data; and • Signed laboratory reports including the sample designation, date of sample collection, date of sample analysis, laboratory analytical method employed, sample volume, and the reporting limit (RL).

LANGAN

Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
Attachment B
22 September 2025
781016901

6.0 REFERENCES
Analytical Consulting Group, Inc. (ACG), 2021 a. Site Assessment Workplan. Monitoring Well Evaluation. Soil Vapor Sampling. Indoor Air Sampling. Former Semco Twist Drill & Tool Company. 2936 Industrial Parkway.

Santa Maria, California. Site I.D. No. SLT3S2411351 (October 20, 2015, California Water Code [Water Code] section 13267 Investigative Order [2015 Orderl. February 12.

ACG, 2021 b. Results of Indoor Air Sampling, Former Semco Twist Drill & Tool Company. 2936 Industrial Parkway. Santa Maria, California. April 7.

ACG, 2021c. Monitoring Well Investigation Report, Former Semco Twist Drill & Tool Company. 2936 Industrial Parkway. Santa Maria, California. Site I.D. No. SLT3S2411351. July 16.

ACG, 2021d. Soil Vapor Sampling Report, Former Semco Twist Drill & Tool Company. 2936 Industrial Parkway. Santa Maria, California. Site I.D. No. SLT3S2411351. July 16.

ACG, 2022a. Results of Second Round Indoor Air Sampling, Former Semco Twist Drill & Tool Company. 2936 Industrial Parkway. Santa Maria, California. February 11.

ACG, 2022b. Site Assessment Report, Former Semco Twist Drill & Tool Company. 2936 Industrial Parkway.

Santa Maria, California. Site I.D. No. SLT3S2411351. May 25.

California Environmental Protection Agency Department of Toxic Substances Control (DTSC). 2011.

Guidance for the Evaluation and Mitigation of Subsurface Vapor Intrusion to Indoor Air (Vapor Intrusion Guidance). October.

California Department of Water Resources (DWR). 1991. Monitoring Well Standards Bulletin 74-90. June 1991.

DWR, 2003, California's Groundwater, Bulletin 118 — Update 2003, dated 2003.

DWR. 2004. California Department of Water Resources Santa Maria River Valley Groundwater Basin.

California's Groundwater Bulletin No. 118. Last updated February 27, 2004.

California Environmental Protection Agency (CaIEPA) Department of Toxic Substances Control (DTSC), 2010. Proven Technologies and Remedies Guidance Remediation of Chlorinated Volatile Organic Compounds in Vadose Zone Soil. April. Retrieved from:
https://dtsc.ca.gov/wp-content/uploads/sites/31/2018/11/cVOC_040110.pdf CaIEPA DTSC, Los Angeles Regional Water Quality Control Board, and San Francisco Regional Water Quality Control Board, 2015. Advisory -Active Soil Gas Investigations. July.

Central Coast Regional Water Quality Control Board (CCRWQCB). 2023. Cleanup and Abatement Order No.

R3-2023-0070. Former Semco Twist Drill and Tool Company, Inc. ET AL. Industrial Parkway, Santa Maria Santa Barbara County. September 25.

LANGAN

Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
Attachment B
22 September 2025
781016901

CCRWQCB, State Water Resources Control Board (SWRCB), and CaIEPA, 2019. Water Quality Plan for the Central Coast Basin. June.

Dixson, K.L. and Nichols, R., 2006. Soil vapor extraction system design: A case study comparing vacuum and pore -gas velocity cutoff criteria. Remediation Journal 17(1). December. DOI: 10.1002/rem.20112 ERC Environmental and Energy Services Co., 1988. Subsurface Investigation Letter Report, SEMCO Twist Drill and Tool Company, Santa Maria, California. 1 April.

ERC Environmental and Energy Services Co., 1989. Subsurface Investigation: Phase 2, SEMCO Twist Drill and Tool Company Facility, Santa Maria, California, California. March.

ERC Environmental and Energy Services Co., 1990a. Supplemental Subsurface Investigation, SEMCO Twist Drill and Tool Company Facility, Santa Maria, California. March.

ERC Environmental and Energy Services Co., 1990b. Shallow and Deep Ground -water Investigation SEMCO Twist Drill and Tool Company Facility, Santa Maria, California. July.

ERC Environmental and Energy Services Co., 1990c. Remedial Action Plan for Shallow Aquifer System, SEMCO Twist Drill and Tool Company Facility, Santa Maria, California. August.

ERC Environmental and Energy Services Co., 1991. Results of Soil Sampling Beneath the Concrete Pond Structure Located at the SEMCO Facility, Santa Maria, California. 3 December.

Everest Services, Inc., 2004. 2003 Third Quarter Report for Groundwater Monitoring Activities at 2936 Industrial Parkway, APNs 111-291-027 & 028, Santa Maria, California. February 24.

Fetter, 2014. Applied Hydrogeology, Fourth Edition.

Langan, 2024. Groundwater Monitoring Network and Extraction and Treatment System Evaluation Workplan, 2926, 2936, 2946, 2956, 2976, and 2986 Industrial Parkway, Santa Maria, California. 25 March.

Langan, 2025. Draft Revised Offsite Deep Groundwater Monitoring Investigation Work Plan, 2926, 2936, 2946, 2956, 2976, and 2986 Industrial Parkway, Santa Maria, California. June.

National Drought Mitigation Center, 2025. United States Drought Monitor Time Series: Santa Barbara County, 2000-2025. https://droughtmonitor.unl.edu/DmData/TimeSeries.aspx .

Occupational Safety and Health Administration. Hazardous Waste Operations and Emergency Response.

Code of Federal Regulations. Title 29, Part 1910, Section 120(b)(4).

Padre, 2023. Interim Remedial Action Plan, High -Vacuum Dual Phase Extraction Pilot Test, 3037 Industrial Parkway, Santa Maria, Santa Barbara County, California, (GLOBAL ID NO. SLT3S0301290). Prepared for: EFT Enterprises, L.P. July.

LANGAN

Work Plan For Onsite Soil Vapor Extraction
2936 Industrial Parkway, Santa Maria
Santa Barbara County, California
(Global ID No. SLT3S0301290)
Attachment B
22 September 2025
781016901

Padre, 2024. Interim Remedial Action Report, High -Vacuum Dual Phase Extraction Pilot Test, 3037 Industrial Parkway, Santa Maria, Santa Barbara County, California, (GLOBAL ID NO. SLT3S0301290). Prepared for: EFT Enterprises, L.P. July.

San Francisco Bay Regional Water Quality Control Board (SFRWQCB), 2019. Environmental Screening Levels (ESLs): Groundwater Direct Exposure — Maximum Contaminant Level (MCL) Priority. July.

Switzer, C. and Kozzon, D. S., 2007. Soil Vapor Extraction Performance in Layered Vadose Zone Materials.

May. https://doi.org/10.2136/vzj2005.0131
Tetra Tech, Inc. (Tetra Tech), 1994. SEMCO Groundwater Remediation System Repair and Maintenance - Status Report, 2936 Industrial Parkway, Santa Maria, California, Contract No. 91 T0087, Task Order No. 3- 087-1.0-300478. 19 August.

Tetra Tech, 1998a. Water Treatment System, SEMCO Twist Drill and Tool Company, Santa Maria, California, Monitoring and Reporting Program (MRP) No. 92-16.30 March.

Tetra Tech, 1998b. Semi -Annual Report of Groundwater Monitoring, SEMCO Twist Drill and Tool Company, Santa Maria, California. December.

Tetra Tech, 2000. Letter Report on the Status of the SEMCO Groundwater Treatment System and Present Specific Actions for Groundwater Cleanup Optimization. 1 November.

Truex, M. J., Becker, D. J., Simon, M. A., Oostrom, M., Rice, A. K., &Johnson, C. D., 2013. Soil Vapor Extraction System Optimization, Transition, and Closure Guidance (PNNL-21843, RPT-DVZ-AFRI-006).

Pacific Northwest National Laboratory. Prepared for the U.S. Department of Energy under Contract DE- AC05-76RL01830. February. Retrieved from: https://www.clu-in.org/download/techfocus/sve/pnnl- 21843.pdf
United States Army Corps of Engineers (USACE), 2002. Soil Vapor Extraction and Bioventing. 3 June.

United States Environmental Protection Agency (USEPA) Solid Waste and Emergency Response, 1999.

Multi -Phase Extraction: State -of -the -Practice. June.

USEPA Office of Research and Development, 2001. Development of Recommendations and Methods to Support Assessment of Soil Venting Performance and Closure. September.

USEPA, 2017. How to Evaluate Alternative Cleanup Technologies For Underground Storage Tank Sties, A Guide For Corrective Action Plan Reviewers, Chapter II Soil Vapor Extraction. October.

WESTEC Services, 1989. Subsurface Investigation SEMCO Twist Drill and Tool Company, Santa Maria, California. January.

Worts, G.F. 1951. Geology and Ground -Water Resources of the Santa Maria Valley Area, California.

Geologic Survey Water -Supply Paper 1000. 1951. Available online:
https://pubs.usgs.gov/wsp/1000/report.pdf
LANGAN

Attachment B
TABLES
LANGAN

Table 1
Onsite Well Construction Summary
SEMCO, Santa Maria, California
Atfacnentrect: 781016901
eptember 2025
Well Name
Boring
Name
Well Status
Well Depth (feet bgs)
Water Depth (feet bgs)
Screen
Interval (feet
bgs)
Well
diameter
Well Head
Elevation2 at
installation
(feet above
msl)
Ground
Surface
Elevation at
installation
(feet above
msl)
Surface cover
Notes
2003
2021
Well
Completion Log
(1988 - 1991)
Extraction Well
Permit
Application
(1992)
2003
2021
2003
2021
Shallow Groundwater Monitoring Wells
MW-1/SMW-1
-
Sampled
Located, sampled, recharged
after purging 22 gallons
20 --

24.7 24.9

11.15 10.9

5.21 - 20
2 inches
236.44/ 236.49
236.62/ 236.63
Flush mount
with traffic box
Labeled as MW 12 on one map;
"could not grout surface casing"
noted on well construction log
MW-2/SMW-2
-
Sampled
Located, well cover not able to
be removed
26 --

20.31 —

19.99 —

5.2 - 25.2
2 inches
236.17/ 236.18
236.51/ 236.53
Flush mount
with traffic box

0.31 feet of free product on top
of water in 2003; "surface casing
not grouted" noted on well
construction log
MW-3/SMW-3
--
Dry
Located, well plug intact, dry
but moist at the bottom

24.5 --

22.21 22.44
—
—

9.5 - 24.5
2 inches
237.55/ 237.56
237.84/ 237.86
Flush mount
with traffic box
—
MW -4
NB -6
Dry
Located, well plug intact, dry
but moist at the bottom
30 --

30.4 29.52
—
—

9.5 - 29.4
4 inches
236.09
236.42
Flush mount
with traffic box
"dry well" noted on construction
log
MW -5
NB -7
Sampled
Located, well plug intact but
casing and well box damaged,
dry but moist at the bottom

29.5 --
29 29.02
9 --

8.8 - 28.9
4 inches
237.80
238.07
Flush mount
with traffic box
"dry well" noted on construction
log
MW -6
NB -12
Sampled
Not located

20.5 —

18.91 -

15.2 —

5.1 -19.9
4 inches
237.30
237.91
Flush mount
with traffic box
"low well yield" noted on
construction log
MW -7
NB -14
--
Located, well plug intact but
well box damaged and top
plugged with soil

24.8 —

45.6 21.14
--
--

3.9 - 24.0
4 inches
237.56
238.11
Flush mount
with traffic box
"dry well" noted on construction
log
MW -8
NB -15
Sampled
Located, sampled with grab
sample

25.5 —

24.7 13.46

8.91 9.9

4.7 - 24.8
4 inches
236.01
236.62
Flush mount
with traffic box
"dry well" noted on construction
log
MW -9
NB -13
Dry
Located, well plug intact, dry
but moist at the bottom

25.6 —

24.55 24.77
—
—

4.7 - 24.8
4 inches
236.32
236.79
Flush mount
with traffic box
"dry well" noted on construction
log
MW -10
-
Sampled
Located, well plug and cap
intact, sampled, recharged
after purging 6.5 gallons

39.0 --

37.6 37.74

34.2 34.17

33.0 - 37.5
4 inches
236.80
237.00
Flush mount
with traffic box

—
MW -11
NB -22
Dry
Located, well plug intact and
cap intact, dry but moist at the
bottom

20.0 --

40.05 40.27
-
--

9.7 - 19.2
4 inches
237.58
238.00
Flush mount
with traffic box
Labeled as MW -16 on one map
MW -12
NB -27
Not located
Not located

25.5 --
—
—

9.1 - 24.6
4 inches
236.24
236.58
Flush mount
with traffic box
—
MW -13
NB -39
Not located
Not located

41.0 --
--
--
--
--

20.50-39.40
2 inches
238.04
238.34
Flush mount
with traffic box
—
MW -14
NB -38
Dry
Located, well plug and cap
intact, dry but moist at the
bottom

47.25 -
21 85

45.74 --
--

25.65 - 45.65
2 inches
237.57
237.89
Flush mount
with traffic box
MW -15
NB -40
Not located
Not located

45.05 --
--
--
--
--

26.30 - 45.05
2 inches
236.24
236.45
Flush mount
with traffic box
MW -16
NB -44
Dry
Located , dry

45.57 --

45.18 45.36
--
--

25.47 - 45.09
2 inches
236.49
236.72
Flush mount
with traffic box

LANGAN

Table 1
Onsite Well Construction Summary
SEMCO, Santa Maria, California
Ati_Aanentr ect:781016901
eptember 2025
Well Name
Boring
Name
Well Status
Well Depth (feet bgs)
Water Depth (feet bgs)
Screen
Interval (feet
bgs)
Well
diameter
Well Head
Elevation2 at
installation
(feet above
msl)
Ground
Surface
Elevation at
installation
(feet above
msl)
Surface cover
Notes
2003
2021
Well
Completion Log
(1988 - 1991)
Extraction Well
Permit
Application
(1992)
2003
2021
2003
2021
Deep Groundwater Monitoring Wells
DMW-1
DMW-1
Abandoned
NA
210
--
--
—
—
--
188 - 208
4 inches
237.74
237.9
Flush mount
with traffic box
DMW-2
DMW-2
Sampled
Located, well plug intact, dry
but moist at the bottom
208
—
199
191.87
139.22
--
179 - 199
4 inches
236.43
236.4
Flush mount
with traffic box
DMW-3
DMW-3
Sampled
Not located
201.0
--
200
--
139
--
180 - 200
4 inches
236.19
236.38
Flush mount
with traffic box
DMW-4
DMW-4
Sampled
Located, dry
209.4
--
207
204.33
141
--
187 - 207
4 inches
238.21
238.44
Flush mount
with traffic box
DMW-51
--
Dry
Located, dry but moist at the
bottom
200.63
--
--
—
4 inches
--
--
—
--
Extraction Wells
EX -1
—
--
—
—
40 —
—
--
--
10 - 40
4 inches
--
--
--
EX-2
--
--
—
--
40 --
—
--
--
10 - 40
4 inches
--
--
--
EX-3
--
--
—
—
40 --
--
--
--
10 - 40
4 inches
--
--
--
EX-4
--
--
—
—
40 --
--
--
—
10 - 40
4 inches
--
--
--
--
EX-5
--
--
—
—
40 --
--
-
--
10 - 40
4 inches
--
--
--
--
Notes:
'Well location found during 2021 investigation and not previously 2 Well Head Elevation is presumed to be Top of Casing Elevation Information gathered from the 2003 Everest Services, Inc. report, Appendix A.
bgs - below ground surface
msl - mean sea level
noted on other maps or reports. Noted as "DMW5?" for the purpose of the 2021 investigation 2003 Third Quarter Report For Groundwater Monitoring Activities, the 2021 Analytical Consulting Group, Inc. report, Monitoring Well Investigation Report, Former Semco Twist Drill & Tool Company, and Well Completion Logs provided in

LANGAN

Table 2
Historical Groundwater Elevation Data (Shallow/Perched Zone) SEMCO, Santa Maria, California
La nRttachrno4ntt 8781016901
September 2025
Well Name
Casing Elevation
(feet amsl)
Well depth
(feet bwc)
Date measured
Depth to Water (feet
bwc)
Groundwater Elevation
(feet amsl)
MW -1
236.44

24.7 Nov -88

9.37 227.07
Nov -89

10.33 226.11
Feb -90

9.64 226.80
Feb -90

8.57 227.87
Jun -90

10.24 226.20
Dec -98
—
—
Sep -03

11.15 227.34
Jun -21

10.90 227.59
MW -2
236.17

20.3 Nov -88

9.84 226.33
Nov -89

11.56 224.61
Feb -90

8.55 227.62
Feb -90

6.71 229.46
Jun -90

9.56 226.61
Jul -94

18.16 218.01
Jul -95

7.00 229.17
Jun -96

9.71 226.46
Jan -97

7.70 228.47
Jun -97

10.70 225.47
Dec -97

10.77 225.40
Jul -98

6.78 229.39
Nov -98
—
—
Dec -98

6.78 229.39
Jul -99

9.97 226.20
Jan -00

10.30 225.87
Jul -00

10.94 225.23
Dec -00

13.55 222.62
Sep -03

19.99 218.44
Jun -21
Unable to open well
—
MW -3
237.56

22.2 Nov -88

11.56 226.00
Nov -89

12.56 225.00
Feb -90

11.52 226.04
Feb 90

10.62 226.94
Jun -90

11.94 225.62
Dec -98

14.07 223.49
Sep -03
-
-
Jun -21
Dry
—
MW -4
236.09

30.4 Nov -89
—
—
Feb -90
—
—
Feb -90
-
-
Jun -90
—
—
Dec -98
-
-
Sep -03
_ -
-
Jun -21
Dry
—
MW -5
237.80

29.0 Nov -89
—
—
Feb -90
—
—
Feb -90
-
-
Jun -90
—
—
Dec -98

12.88 224.92
Sep -03

9.00 231.03
Jun -21
Dry
—

LANGAiti

Table 2
Historical Groundwater Elevation Data (Shallow/Perched Zone) SEMCO, Santa Maria, California
La nRttachrnsj.entt 8781016901
September 2025
Well Name
Casing Elevation
(feet amsl)
Well depth
(feet bwc)
Date measured
Depth to Water (feet
bwc)
Groundwater Elevation
(feet amsl)
MW -6
237.30

18.9 Nov -89

15.20 222.10
Feb -90

12.60 224.70
Feb -90

10.52 226.78
Jun -90

9.11 228.19
Aug -94

11.23 226.07
Jun -95

11.32 225.98
Jun -96

13.02 224.28
Jan -97

7.69 229.61
Jun -97

13.30 224.00
Dec -97

9.21 228.09
Jul -98

7.89 229.41
Nov -98

13.96 223.34
Dec -98

10.90 226.40
Jul -99

12.51 224.79
Jan -00

12.38 224.92
Jul -00

13.01 224.29
Dec -00

14.29 223.01
Sep -03

15.20 224.34
Jun -21
Unable to locate
—
MW -7
237.56

24.01 Nov -89
—
—
Feb -90
—
—
Feb -90
-
-
Jun -90
—
—
Dec -98
-
-
Sep -03
-
-
Jun -21
Dry
—
MW -8
236.01

24.72 Nov -89
—
-
Feb -90
—
-
Feb -90
-
-
Jun -90

20.45 215.56
Aug -94

10.60 225.41
Jun -95

6.23 229.78
Jun -96

7.81 228.20
Jan -97

3.77 232.24
Jun -97

8.30 227.71
Dec -97

5.19 230.82
Jul -98

5.84 230.17
Nov -98

8.55 227.46
Dec -98

6.36 229.65
Jul -99

6.35 229.66
Jan -00

5.44 230.57
Jul -00

6.25 229.76
Dec -00

6.78 229.23
Sep -03

8.91 229.37
Jun -21

9.90 228.38
MW -9
236.32

24.6 Nov -89
—
—
Feb -90
—
—
Feb -90
-
-
Jun -90
-
-
Dec -98
-
--
Sep-03
—
--
Jun-21
Dry
--

LANGAiti

Table 2
Historical Groundwater Elevation Data (Shallow/Perched Zone) SEMCO, Santa Maria, California
La nRttachrror4ntt 8781016901
September 2025
Well Name
Casing Elevation
(feet amsl)
Well depth
(feet bwc)
Date measured
Depth to Water (feet
bwc)
Groundwater Elevation
(feet amsl)
MW 10
236.80

37.6 Feb -90

34.46 202.34
Feb -90

34.31 202.49
Jun -90

34.28 202.52
Aug -94

33.96 202.84
Jun -95

33.47 203.33
Jun -96

33.95 202.85
Jan -97

34.19 202.61
Jun -97

34.03 202.77
Dec -97

34.41 202.39
Jul -98

33.30 203.50
Nov -98

34.10 202.70
Dec -98

34.18 202.62
Jul -99

33.97 202.83
Jan -00

34.25 202.55
Jul -00

33.87 202.93
Dec -00

34.21 202.59
Sep -03

34.20 204.89
Jun -21

34.17 204.92
MW -11
237.58

40.0 Feb -90

16.45 221.13
Feb -90

9.71 227.87
Jun -90

11.66 225.92
Feb -90

16.45 221.13
Aug -94

12.39 225.19
Jun -95

9.75 227.83
Jun -96

11.26 226.32
Jan -97

7.71 229.87
Jun -97

12.00 225.58
Dec -97

9.35 228.23
Jul -98

8.68 228.90
Nov -98

13.48 224.10
Dec -98

9.80 227.78
Jul -99

11.02 226.56
Jan -00

11.99 225.59
Jul -00

11.74 225.84
Dec -00

13.73 223.85
Sep -03
-
-
Jun -21
Dry
-
MW -14
239.84

21.85 Sep 03
-
-

45.74 Jun -21
Dry
-
MW -16
238.76

45.2 Sep -03
-
-
Jun -21
Dry
—
Notes:

Historical data from 2003 Third Quarter Report For Groundwater Monitoring Activities at 2936 Industrial Parkway, APNs 111-291-027 & 028, Santa Maria, California, dated 24 February 2004 by Everest Services, Inc. and Monitoring WeII Investigation Report, Former Semco Twist Drill & Tool Company, 2936 Industrial Parkway, Santa Maria, California, dated 16 July 2021 by Analytical Consulting Group, Inc. 'Well depth reported at 45.6 feet in bws in 2003.
2 Well depth reported at 13.46 feet in bwc in 2021.
amsl - above mean sea level
bwc - below well casing
— - Information not available

LANGAiti

Table 3
Proposed SVE Well Construction Details
SEMCO, Santa Maria, California
LangRialige,mti 781016901
September 2025
Well ID
Maximum Total
Depth of Well
(feet bgs)
Casing Diameter
(inches)
Approximate
Bentonite Seal
Interval
(feet bgs)
Approximate
Sand Pack
Interval
(feet bgs)
Screen Slot Size
(inch)
Approximate Screened Interval
(feet bgs)
Well Screen
(Top)
Well Screen
(Bottom)
SVE-1
50 4
2 - 4
4 - 50

0.01 5
50 SVE-2
50 4
2 - 4
4 - 50

0.01 5
50 SVE-3
50 4
2 - 4
4 - 50

0.01 5
50 SVE-4
50 4
2 - 4
4 - 50

0.01 5
50 SVE-5
50 4
2 - 4
4 - 50

0.01 5
50 SVE-6
50 4
2 - 4
4 - 50

0.01 5
50 SVE-7
50 4
2 - 4
4 - 50

0.01 5
50 SVE-8
50 4
2 - 4
4 - 50

0.01 5
50 Notes:

SVE wells will be installed up to a maximum total depth of 50 feet bgs and actual depths will be recorded during installation. bgs - below ground surface
ID - identification
SVE - soil vapor extraction

LANGAN

Table 4
Preliminary Estimated VOC Emissions
SEMCO, Santa Maria, California
LangwrritaEsRmgntt 1016901
September 2025
COCs
Other VOCs detected above ESLs
Compound
TCE
cis-1,2-DCE
trans-1,2-DCE
Vinyl Chloride
PCE
1,1-DCE
Chloroform
Benzene
Maximum VOC Concentrations in Soil Gas (pg/m3)
11,000,000
4,000,000
5,600

5.7 13,000
18,000
45 38
Maximum Volumetric Air Flow (ft3/min)'
1,000
1,000
1,000
1,000
1,000
1,000
1,000
1,000
Maximum Daily VOC Emissions (Ibs/Day)2
989
360

0.50 0.0005

1.17 1.62

0.0040

0.0034
Maximum Daily VOC Emissions (Ibs/Year)2
360,932
131,248
184

0.187
427
591

1.48 1.25
Maximum Daily VOC Emissions Total2
721,900
262,500
370

0.37 850
1,180

3.0 2.5
Notes:
11,000 ft3/min was selected as the maximum flow rate for the purposes of this preliminary estimate but the SVE system operation will be refined based on initial testing results. 2 Maximum VOC emissions calculation is based the operation of eight wells at a time running for 24 hours/day for a total of two years and does not account for reductions in contaminant concentrations during operation.

Calculations herein are preliminary based on historical sampling data and may not reflect actual SVE operating conditions.

COCs - contaminants of concern
DCE - dichloroethene
ESLs - environmental screening levels
TCE - trichloroethene
PCE - tetrachloroethene
ROI - radius of influence
VOC - volatile organic compound
ft3/min - cubic feet per minute
Ibs - pounds
pg/m3 - micrograms per cubic meter
Example Calculations:

Maximum Daily Total VOC Emissions (Ibs/Day) =
11,000,000 µg 1,000 ft' 0.0283 m3 2.205e-9[bs 60 min 24 hour x x x x x = 989 lbs/day
m3 min 1 ft3 1µg 1 hour 1 day
Maximum Daily Total VOC Emissions (Ibs/Year) =
989 ibs 365 days
x = 360,932 lbs/year
day year

LANGAN

Attachment B

FIGURES
LANGAN

Attachment B
1st St
a,
ti
a,
W Carmen Ln
Via R
osa
W Betteravla Rd
Sunset Ridge
Golf Center
0 ro
3 Farrway D,
Mafi Trench Location
W Betteravia Rd
W McCoy Ln
Santa Maria
Country Club
SITE\
I J
a
-4
251 ft
Waller Park
O
In
135
Dickson Dr
r
s
\,(\se D r
5`
Valley Christian
Academy
Miles Ave
Shirley Ln
tY
c.)
'a) c
d� u
Hillview Rd
Oa�lia I
Legend
c::1 Approximate Site Boundary
Notes:

1. Site located in the Santa Marla USGS Quadrera)a.

2. Topographic baseman is provided through Langan's Earl AroGIS software licensing and A.rcG IS amine, National Geographic Sodety, leased.

3. All 'matures shown are approximata.
2,000
0 2,000

SCALE IN FEET
LANGAN
Langan CA, Inc,
104 W Anapamu Street, Suite 204B
Santa Barbara, CA93101
Project
SEYl W

SANTA MARIA
Figure Title
SITE

LOCATION MAP
Project No.
781016901
Data
6/16/2025
Scale
1" = 2,000'
Drawn By
AC
Figure
1 T: 805.957.6000 R 805.957.5001
www.langan,com

SANTA BARBARA

COUNTY CALIFORNIA
Path 'P.Ia ngan cnmidala,,,SEAldata9'.781016901lProject Data''.ArcGISlAPRX',781016901 aprx

Attachment B
Legend
▪ Monitoring Well Location • Former Water Supply Well 2AS ▪ Deep Monitoring Well Location Former Semeo Building
{ Extraction Well Location C::1 Approximate Site Boundary Notes;
t. Aerial imagery provided 6y Near Map, 07O3/2024.

2. All features shown are approximate,

3. Well location data digitized from the 2003 Everest Seances, Inc. report, 2003 Third Quarter Report For Groundwater
Monitoring Aclwrltles and the 2021 Analytical' Consulting Group, Inc. report, Monttaring Weil Investgatlon Report.

Former Semco TNlsl Drill $ Tool Company.
150 0 150

SCALE IN FEET
LANGAN
Langan CA, Inc.
104 W Anapamu Street, Suite 204B
Santa Barbera, CA93101
T: 80 5.957.6000 F: 805.957.6001
www.langan.com
Project
SEIvICO

SANTA MARIA

SANTA BARBARA

COUNTY CALIFORNIA
Figure Title

SITE PLAN
Protect No.
781016901
Date
6/17/2025
Scale
1"=150'
Drawn By
AC
Figure
2 ® 2025 Langan
Path Mangan.cowldalalSBAldata9i7S1016g011Project OataJArcGISWPRx1781016901.aprx

ttarhmPnt R
11 ji '-‘47 }
Location
MW -6
. -'
r`
Sample Name
MW -6_110589
MW -6_020190
MW -6_060690
MW -6_080494
MW -6_121598
MW -6_092203
-F
, W
VOCs
11/05/1989
02/01/1990
06106/1990
08/04/1994
1211511998
09/2212003
-
Location
t
MW -11
Cis-1,2-Dichloroethene
3,000
19 20
,-
Sample Name
MW -11_020390
MW -11_060790
MW -11_080494
MW -11_121598
Trichloroethene (TCE)
18,000
18,000
15,000
1,000
86 23
;zx
VOCs (Mg(L)
02/0311990
06/07/1990
08/04/1994
12/15/1998
T
__
,
Cis-1,2-Dichloroethene

8.9 1-3 ill
Trichloroethene (TCE)
290
54 20
38 .,
I
,
1 k
.. -
,• • • . • Golden
%' ��
-
West Packaging
2986 Industrial Pkwy
- • - -
- - - -_
2966 Industrial Pkwy Hans Duus Blacksmith
Raflr;oac!

Location) MW -3
2976 Industrial
Pkwy a{ 1 6�
Sample Name
SMW-3 111088
SMNW-3 110589
SMW-3.020190
MW -3.060790
SMW-3 121498
- W
VOCE (pg/L)
11110/1988
11105/1989
02/01/1990
06/07/1990
12/14/1998
15,000
3,000
a
������������`.�w����i���•�Cis-1,2-Dlohloraethene
Tetraohloroethene (PCE)
1,500
IT
I
Trans-1,2-Dichloroethene
220
`
Trichloraethene TCE)
5,500
42,000
57000
110,000
35,000
Il
111-291-040
111 2Jt N
1-041
111-291-042
CURRY
�}
J _ 41-4
I lF.

I
CURRY
Location
MW -2

PARKWAY, LP
.�
CURRY

PARKWAY, LP
MW -13
o

I PARKWAY, L'P
2986 INDUSTRIAL-
111 293 043 7
f
Sample Name
SMW-2_111088
SMW-2_110589
SMW2-2-90
w29G6 INDUSTRIAL
f
PKWY
2976 INDUSTRIAL
--
PKWY
Gt1RRY 'ift

PARKWAY, LP
VOCs 1L
(pg/L)
11/11/1988
11/05/1989
02103/1990
I
PKWY
MW -11
2996 INDUSTRIAL
Trans-1,2-Dichloroethene
7,700
l
PKWY -
Trichloroethene (TCE)
200
220
Location
M4Y•10
MW -6 MW -7 MW -14
t1,
Sample Name
MW -10_022090
MW -10 060890
MW -10 080494
MW -10 121498
MW -10 062921
I
Location
MW -5
V0Cs (pg/L)
02120/1990
06/08/1'990
08/0411994
12/14/1998
06/29/2021
?
y 111 X91-037'
Sample Name
MW -5_121598
GWlfiWB-092203
�I
RHINE, LP 2936
2AS
1,1,2-Trichloroethane
64 t
VOCs (Y9IL)
12/15/1998
09/2212003
Cis-1,2-Dichloroethene
43,000
15,000
Z000

INDUSTRIAL
Trichloroethene (TCE
30 Trichloraethene (TCE
130,000
270,000 270,000
530,000
83,000
PKWY
MW -3
■
'i� l
I
N
I
I
I
MW -10
MW
2 MW -5
I
a
I
.

MW -12 •�
i'
L calio
MW 8
1 I - - I; '4'
d
MW -6
Sample Nani
W-8 022O90 MW -A 060€190 MW -8_080494
MW -8_121698 MW -8_092203
MWB-grab
:ill) 4 I rr -.

MW-16-14 MW-1
. �� -
_
V0CWW1)
tp
02;20+1994 00.14811990 88/0471994
12/15/1998 I 09/22/2003
06,'26,'2021
- .. ;` - 1 6
111-291-038
I
C,s1.2Dlehlaroethene
r.3ott

2.4 9
`. 111-291-039
4 SALAS, FERNANDO MW-9�
MW -15
Trlchlomethene(ICE)
3,70 88

7.8 57
• 1 CURRir

I FIIGUEROA
- 'tl u. '
i29 T AL
a
.N

PARKWAY, LP
•
j
PKWYgirl
A [
_ p i-
V 1-n
I
I
2956 INDUSTRIAL PKWY I
I
'
ea
,
.e.

Location
Mw -190
• 1
.•
I
�l

1_ T J -t
Sample Name
N7W18U_060890
•
i or
it
i
3i
{..
..

IQ [' iVOCe
algal
06/08/7990
I
_ f
Ci -1.2
Dichloroethene
1,300
•'T.
.

I"
r
MW -4-
111-291-036
Trichloroethene(ICE)
80 I
I y
j
1 •,
i
1 •r.
,
f 1 .�.
rt
'.s
1 I

CURRY PARKWAY, LP
2946 INDUSTRIAL PKWY
I
_may- r-
ti
• .. rff, ..� gift eb .. .... r. ,mutt.. in ri alt -_ r truer p,r trr on rlrsmi mm r Ir wr..r�.rrrear r,
_
Location
..
51W-12
- -_
- t
Sample Name
M1W-12_080890 ,
MW 12 080494
MW -12_12149$
M
minent w.
r Santa Maria BBQ aLltflttf'rs
V0Cs
tpgii
06/08/1990
46/04/1994
72/74/1998
2936 Industrial Pkwy Industrial Parkway
Cis-1,2-Dichloroethene
8,500
4200
Atfr'/f .
• - 4,
Trichloraethene
fTCEj
4,800
3„200
-- -
.3,800
-
..�
�..
la - - I,m a r t. !
'
-
Location
MW -1
_. ti
, ,� r m,
Sample Name
SMW1_111088
SMW-1_110589
SHAW -1_020390
MW -1_060690
MW -1_121498
MW -1_092203.

MW -1_062921
_
S ill * -
it
V.

VOCs (mot)
11/10/1988
11/05/1989

02./03/1990
48/48/1990
12/14/1998
09/22/2003
06/29/2021
-
Cis-1,2-Dlchtamethene
-

0.6 490
47 •.

Trans-1,2-Dichloroethene
2,800

0.7 1170 0 100
TrIchloroethene (TCE)
280,000
320,000
430,000
250,000
24 300
280
8 00 to
r
''
1,4-Dioxans (P-Dioxane)
-
89 2
SCALE IN FEET —_._
1 r
— 4 _te
Nate.

Legend 1:nerxan gsrymouldedbyNearmap,arinao24
g 4.All shown are
3- samples are 'measured in feet below ground surface (feet bga).

VOCs Volatile Com ound.

LANGAN
Project
Figure Title
Project No.
781016901
Figure
Canada
4 = is
organic Compounds
'MonitoringWell Location ', SNA•Not Analyzed
B. ND U • Net detected above laboratory ,waling b»Ms
2996 Industrial Parkway, Santa Maria, Caldana, dated 16 July 2021 by Analytical Consulting Group, Inc.; ej7'- Groundwater analytical data and well located digitized ham Monitoring Well Imvestigation Raison, Pomar Samoa Twist Drill SERSICO Former Water Supply Well 2AS a Tool Comps
/� `,

SHALLOW/PERCHED
! 1 I % A 1
Date
6/17!20255
,
2003 Third Charter Report For Groundwater Monitoring kM n Advirres a12938 useral Parkway, APNs 111.291.027& 028, Langan CA, Inc.
{,j RO u NDVYATER VOCS
Scale
A
Approximate Location of Well 2AS Same Mad., California dated 24 February 2004 by Everest Semmes, Inc; Sow.•Annual Report of Groundwater Monlcong, pp ma oca SEMCO Twist Drill and Tod Company, Santa Maria California dared Deaambar 1098 by Terra Tech. Inc.; SEMCO Groundwater Remediation System Repair and Ma,ntenanoeStatus Report, 2936 fM strdal P rkway, SariM Maria, Caliromia AND 1 4 - D I OXA N E
1" = 100,
Former Semco Building Contract No. 91-1100B7, T00B7. k Order No. 3-087-1-0-300478 dated 19 August 1994 by Tetra Tech Inc.; Shallow and Deep Groundwater Irrvesligallon SEMCO Twist Drill Tad Company Faulk', Santa Maria, CaAfronl dated Arty 1990 by ERG 104 W Ana arnu `Street, Suite 2040
P Drawn
/
By
and
Environmental and Energy &memo Co.; Supplemental Subsurface Investigatr+ SEMCO Twist Doll and Tool Company L ] Approximate Site Boundary Faciity, Santa Mane, California dated Maroh t990 by ERC Envrionrnental and Energy Sere Co.; Subaru -foe Investigation:

Santa Barbara, CA 93141

SANTA MARIA

CONCENTRATIONS MAP
AC
r r Phase 2 SEMCO Twist Drill and Tod Conpnay Tank. Santa Maria, California dated December 1989 by ERC

Emmonmental and Energy Services Co.; and, St bsurfaoe Mrrestigatrm SEMCO Twist Drill and Tool Company, Santa Maria, Parcel California datedJanuar/1989byWESTEcservices. SANTA T: 805.957.6000 F: 805.957-6001 www.langan.com

BARBARA COUNTY CALIFORNIA
Path: Wangan.earnldalalSBAldata917810169011PrMeot DatalArceIS)APRx1781016901.aprx

Attarhmant R
Legend
o Soil Sample
• Former Water Supply Well 2AS
Approximate Location of Well 2AS
IJFormer Sernco Building
l.. Approximate Site Boundary
A!.

Notes:
1 Aerial imagery provided by Nearmap, 07/03/2024.

2. All features shown are approximate.

3. Soli sampling location data digitized from the Site Assessment Report. Vadose Zone Soil Sampling, Former SEMCO Twist Drill & Tool Company, 2936 Industrial Parkway. Santa Marls.

California dated 25 May 2022 by Analytical Consulting Group, Inc.; Results of Solt Sampling Beneath the Concrete Pond Structure Located at the SEMCO Faciity, Santa Maria. California dated 3 December 1991 lay ERC Environmental and Energy Services Co. Inc.; Supplementary Subsurface Investigation, SEMCO Twist Drill and Tool Company Facility, Santa Maria, California dated March 1990 by ERC Environmental and Energy Services Co.; and, Subsurface Investigaton Letter Report, SEMCO Twist Drill and Tool Company, Santa Marla, California dated 1 April 1988 by WESTEC Services, Inc.
100 o 100
SP -1 SP -2
P-3
B7-4-)
Railroad
8227
NB42
NB32
.1O
88 iJ B4 B33 1J er
—B224
Industrial
LANGAN
Langan CA, Inc.
104 W Anaparnu Street, Suite 2040
Santa Barbara, CA 93101
Parkway
Project
SEM co

SANTA MARIA
Figure Title

SOIL SAMPLING

LOCATIONS MAP
Project No.
781016901
Date
6/17/2025
Scale
1" = 100'
Drawn By
AC
Figure
4 SCALE IN FEET
T: 805.957.6000 F: 805.957.6001 www.langan.com

SANTA BARBARA COUNTY CALIFORNIA
Path: Mangan.carnldatalSBAldata917810169011Prolect DataLArceISLAPPJ0781016901.aprx

•
Former Water Supply Well 2AS
Previous Soil Vapor Sampling
Locations
3,000 pgfm3 TCE
30,000 pglm3 TCE
300,000 pg/m' TCE
3,000,000 pgfm3 TCE
Former Semco Building
L 1:1 Approximate Site Boundary
Parcel
Notes:

1. Aerial Imagery provided by Nearmap. 07/012024.

2. All features shown are approximate.

3. Samples are measured in feet below ground
surface (feet bgs),

4. VOCs = Volatile Organic Compounds

5. Sail vapor (SV) and sub -slab (SS) sampling well
location and concentration data digitized from the Sot
Vapor Sampling (deport, Farmer SEMCD Twist Drill & Tool Company, 2936 Industrial Parkway, Santa Maria, California.

Site I.D. No. St.T3S2411351 dated 16 July 2021 by Analytical Consulting Group, Inc.
60 0 60

SCALE IN FEET
L14IVt514IV
Langan CA, Inc.
104 W Anapamu Street, Suite 2040
Santa Barbara, CA 93101
T: 805.957.6000 F: 805.957.6001 www.langan.com
Project
WA CO

SANTA MARIA

SANTA BARBARA COUNTY CALIFORNIA
Figure Title

SOIL VAPOR TCE

CONCENTRATIONS

CONTOUR MAP
Project No.
781016901
Date
7/30/2025
Scale
1"=60'
Drawn By
AC
Figure
5 Path: Mangan.carn'idatal8BAldata417blolea01tProlect DatalAncelalAPRk17a1016901.aprx

Attachment R
Project
Figure Title
Project No.
781016901
Figure
Legend
i Previous Soil Vapor Sampling
Locations
Previous Extraction Well Location
Proposed Extraction Well Location
Approximate SVE System Piping
Configuration
r
Former Samoa Building
Approximate location of SVE
Treatment System Enclosure
-- Approximate Extraction Well
--• Radius of Capture (28 feet)
Parcel
• SV32
5V2,1 SV19
SV29 110
1 L{ 1 " . EX -2 lig
I
• SS4
-0-SVE-4
Notes:

1. Aerial imagery provided by Nearmap, 0710312024.

2. NI features shown are approximate.

3. SVE = Soil Vapor Extraction

4. Soil vapor (SV) and sub -slab (SS) sampling well lacatlon data digitized from the Soil Vapor Sampling Report, Former SEMCO Twist Drill & Tool Company, 2936 Industrial
Parkway, Santa Maria, California, Site I.D. No. 5L7352411351 dated 16 July 2[121 by Analytical Consulting Group, Inc. 40 0 40

SCALE IN FEET
SVE-2
SV16
i
1'
I
1 rf EX -3
C
SV150—
,SV-1i- -_
SVE-7
LANGAN
Langan CA, Inc.
104 W Anapamu Street, Suite 204B
Santa Barbara. CA 93101
T: 805.957.6000 F: 805.957.6001 www.langan.com
MA CO

SANTA MARIA

SANTA BARBARA COUNTY CALIFORNIA

SVE SCHEMATIC
LAYOUT
Date
7/30/2025
Scale
1" = 40'
Drawn By
AC
6 SV36
© 2025 Langan
Path: Ulangan.comydatalSBAldala.91781016991 Project DalamArcGISIAPRx1781016901.apra

Attachment B
Interval
1-2 feet
1 foot
Up to
45 feet
Depth
Ground surface
Cover
Up to
2 feet bgs 8 -inch borehole
Up to
4 feet bgs
Up to
5 feet bgs
Up to
50 feet bgs
Bottom of boring _
4 inch Sch 40 PVC well casing
Concrete (for well box)
Cement-bentonite grout (less than
2% bentonite)
1-2 feet Bentonite chip or pellets
seal, hydrated
1 foot
//2/12 filter sand pack
4 inch diameter well screen: Sch 40
PVC flush threaded, 0.010 -inch slots
Bottom of screen up to 50 feet bgs
SVE WELL CONSTRUCTION DIAGRAM (typicafl

NOT TO SCALE
As Needed
o U_ C75
a CD
TD
O O
0 I-
4 -Inch Diameter
Rubber
Well Seal
4 -Inch Diameter Sch. 40
PVC or HDPE
Wellhead Fittinb; Typical
l
As Needed
Access for Tubing and Associated Power
Cords For Submersible Pump; Outlet/Tubing
Diameter 1-1/4"
Access for water level meter
Adjustable Vacuum
Relief Valve (0-20" Hg)
Vacuum Gage (0-20" Hg)
Sample Port
1/4" Inner Diameter
Flow Measurement
Port - Min. 1/2" Diameter
Gate Valve To Fit
Diameter Of Vapor
Extraction Pipe
Vapor Flow
Sch. 40 PVC Or HDPE To Match
Diameter Of Vapor Extraction Hose
As Needed
Vapor Tight Reducer
Typical 4 -inch Sch. 40 PVC
Extraction Well;
Above -Ground Completion
As Needed
To Submersible Pump
SVE WELLHEAD DIAGRAM (typicaO

NOT TO SCALE

WORKPLAN FOR

ONSITE SOIL VAPOR

EXTRACTION
LANGAN
135 MAIN STREET, SUITE 1500, SAN FRANCISCO, CA 94105
T:415 955 5200 F:415 955 5201 www.langan.com

NEW JERSEY NEW YORK CONNECTICUT PENNSYLVANIA WASHINGTON, DC VIRGINIA

WEST VIRGINIA OHIO FLORIDA TEXAS ARIZONA CALIFORNIA

ABU DHABI ATHENS DOHA DUBAI LONDON PANAMA

1.14:021ellin=a9Prialalif 1126 ifs"W=Ift6 NSA"
ta r.. in
Issuances
Description
Date

WORKPLAN FOR

ONSITE SOIL VAPOR

EXTRACTION
Description
7/30/2025
Revisions
Date
Set Title

SOIL VAPOR

EXTRACTION SYSTEM
Drawing Title

SOIL VAPOR

EXTRACTION WELL

CONSTRUCTION AND

WELLHEAD DIAGRAM
Figure No.

Figure 7
Date
Project No.
7/30/2025
781016901

Attachment B

APPENDIX A

AVAILABLE WELL COMPLETION LOGS AND BORING LOGS
LANGAN

SANTA MARIA-LOMPOC AIR BASE
DRILLING 9F WATER WELLS

4. From To
18 ' Yellow Sand
18 LOG
Well 'No. 2,q -$
39 ..Brown Sand 21
48 .•Hard Brown Clay 9
59 i . Clay 'and ;Gravel i 11
79 . 'Yellow ' Clay 20
84 ' . Clay Gravel and Boulder 15
107 Sand Gravel Sandy Clay . 23
145 Sand, Clay, Small Gravel 38
180 Sand, Clay, and Boulders
• 35
Depth
of Strata;
247 ' .Good Gravel <-„'_,/. i,"
Sample No. 9.10-11 taken
between 147 and 182
251 ''Solid Clay and Gravel
Tote], depth of drilling - 2S1 feet
' " " " casing .. 250 "
1Depth after cementing - 247 "
Perforated from 138' up to 182• = 56 feet
t7' holes every 14" 308 holes.

All perforations are k"x3"
Water static) before pumping May 29, 1942 - 125 feet
Drilling and perforating completed May 29, 1942.

Well tested as follows:' All heads below based on measurements from top of casing, (pymP base)
Sample No.

1. 2
3 4
5 7
9 10) Perforated'`
11)
12 ,;
1000 G.P.M. - 135 feet.
?50 " - 133 "
500 " - 131 "
'250 " - 128 "

Attachment B
WESTEC Services, Inc. WELL COMPLETION RECORD
JOB NO. 2805 (.0 00 I WELL NO. �fr1w I HYDROGEOLOGIST SC W /CED/ EA A.

CLIENT _5 Yy)C O DRILLER ✓4 .SE(L VICE•
WELL LOCATION DATE/TIME l 1 1O ✓ 88 c^ 7 4 5

GROUND SURFACE

DETAILS OF CONSTRUCTION
Date Completed 1110/38 9:51
Borehole Diameter (in.) 8/1
Type and Size of Casing (in.) PVC 2i/ 6ct-l40
Type and Size of Screen (in.) WG 24
.5C.1-1 40
Screen Perforation Diameter (in.) . G2O in./.

Screen Length (ft.) ) 4 . 791
Centralizer Depths (ft.) ,
Completion Technique:
1) Type of Filter Pack and Placement
Method
i,uTE2EY 3.541uD/-TEtanriliE
2) Type of Bentonite and Placement ethod
A-61�EfJTD,J lTE CH
3) Type of Grout Mixture and Placement
Method
Description of Potential Problems With Well:

C ou Ll) ftJ T ✓� 2ou T
L5oZFacc C43/ki�
Development Technique
//A ,Li D Vu rn P
GROUT

BENTONITE

FILTER PACK
= To IN
To F
4 Well Head Elevation
Ground Surface Elev.

Well Head Completion Method
7R4 FF" c 7e
Drilling Method/Rig Type
Surface Casing: Type PVC.

Diameter f O
Length 8
o

MATERIALS
Cement (sks.)
Filter Pack Material (ft3)
Casing Material (ft.)
8 Bentonite (ft3
. )
Top of Bentonite Seal • 2 5 ft.
boy
gQH = Top of Filter Pack .3.25 ft.

Top of Screen 5, z 1 ft.

Bottom of Screen 2O ft.

Bottom of Hole 20 ft.

NOTE: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

Attachment B
WWESTEC Services, Inc. WELL COMPLETION RECORD
WELL NO..711W oG HYDROGEOLOGIST SCI / 26.1) / EA A
DRILLER VdLLEY . lA ELLL. 6EJLV/CL_._
JOB NO. 38OS CO
CLIENT 5E/YIC0
WELL LOCATION DATE/TIME 1 Vi u/ 8 5 I D: U 9

GROUND SURFACE

DETAILS OF CONSTRUCTION
Date Completed 1 I/ O /3 b
Borehole Diameter (in.) 8
Type and Size of Casing (in.) RI/C.. 2"
604 40
Type and Size of Screen (in.) PV'C. 2 " SC -I40
Screen Perforation Diameter (in.) . 02
Screen Length (ft.) 20
Centralizer Depths (ft.) ,
Completion Technique:
1) Type of Filter Pack and Placement
Method
t�lo%ITCMX 3 � pry 721=m m /E
12) Type of Bentonite and Placement Method
l�uo\ CJ0,3,Tau ITE. //-HA D
3) Type of Grout Mixture and Placement
Method
Description of Potential Problems With WeII:
6L2l?FACE CAS/ILK, /llor
G iCoc,r r -2)v E "Ft)
No I € Cb Il AP.s
Development Technique
//,atiiQ 2 v -n2
Z 7.1b6
To
4 To5
—/2
la
— 1
— 2z
= z4
I 5
2(4, earl
WeII Head Elevation
Ground Surface Elev.

WeII Head Completion Method
Drilling Method/Rig Type
GEo RFX
Surface Casing: Type PVC
Diameter /0
Length 8'

MATERIALS
Cement (sks.)
Filter Pack Material (ft3)
Casing Material (ft.)
Bentonite (ft3)
Top of Bentonite Seal a. O ft.

Top of Filter Pack 3 .2 ft.

Top of Screen .52
ft.

Bottom of Screen JJ. a ft.

Bottom of Hole ,- (,, ft.

NOTE: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

Attachment B
NWESrEC Services, Inc.

WELL COMPLETION RECORD
JOB NO -3 80 Sla Co I WELL NO..5/Thit)3 HYDROGEOLOGIST a-C1i/CED/ A CLIENT JEil'1C.0 DRILLER VLLLEY jJ 7J- , E1LV 10E
WELL LOCATION DATE/TIME 1)/I 0/ 88 14 : I /.

GROUND SURFACE

DETAILS OF CONSTRUCTION
Date Completed //l/ 0/83
Borehole Diameter (in.) j
Type and Size of Casing (in.) R/c 2 6 .H 4O
Type and Size of Screen (in.) R'C .2" sc H QD
Screen Perforation Diameter (in.)
Screen Length (ft.) JS df
Centralizer Depths (ft.)
Completion Technique:
1) Type of Filter Pack and Placement
Method
Mokirdc.eX ‘3/72CC2-4172/E
2) Type of Bentonite and Placement Method
��. ozrou //-/Q &t o
3) Type of Grout Mixture and Placement
Method
Description of Potential Problems With WeII:

Development Technique
k
=4
WeII Head Elevation
Ground Surface Elev.

Well Head Completion Method
7'7AFF/C dc/
Drilling Method/Rig Type
ro
Surface Casing: Type PVC.

Diameter / O
Length 8'
T,F
= 8
7c's
—Jo

MATERIALS
Cement (sks.)
= t Filter Pack Material (ft3) 4
14 — 20
Casing Material (ft.) 2 Q.5
Bentonite (ft3) /
Top of Bentonite Seal 3 ft.

Top of Filter Pack 5 ft.

Top of Screen 9,S 5 ft.

Bottom of Screen a 4.s ft.

Bottom of Hole X29. 5 ft.

NOTE: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

NWESTEC Services, Inc.

FIELD LOG OF BORING
BORING NUMBER X31 0 m w 3)
LAnggianNote:

Sheet 2 missing
in 1989 Westec
Report
SHEET OF Z —

PROJECT NAME
.5 iC o

PROJECT NUMBER
3$o5(o OO/

ELEVATION AND DATUM

LOCATION

DRILUNG COMPANY
VALLEY G)Ec_c_ SgICVICz.

DRLLER
DATE�D TIME STARTED
// 4/64s 1A:18
DATEAP9 TIME COMPLETED
1l10%36

DRILLING EQUIPMENT
C'F7)

DRILLING METHOD
/-kb flow TCwl

COMPLETION DEPTH
TOTAL NO. OF SAMPLES

WE AND TYPE OF BIT
8 A U �7�

HOLE DIANE/TER
8 SAMPLES
NO OF
BULK
SS
DRIVE

PITCHER
DRILLNG F/L�D
/- O ice)

DRLLPIG
WATER
LEVEL
FIRST

AFTER HOURS

SAMPLE HAMMER ,
TYPE DRIVING WT. 140 lb DROP 30j

HYDROGEOLOGIST/ DATE
ZaiL/a

CHECKED BY/ DATE
d
DEPTH
E
3 DESCRIPTION
N m

ESTIMATED

PERCENT OF

COMMENTS
1 J:7:03
'
GR
SA
Fl
AO
FinJE - ,n c S,w D . 7 -Am -LT.
.S1J
95 5
/a.'a 5 6 Jo - /
5 P t)W/jJ, DkY, mop- 17r�.t;}
/-7411) .3pprn
Z
X
.3O
PpoI -/ metJoR .SILT
/2
14 DETA
ERC
Environment3.
and Energy
Services Co.

JOBNO. 39 3c{ jcC°(
CLIENT 5CIWO
WELL LOCATION 5 E1'y`JC'.0

WELL COMPLETION RECORD
WELL NO. hi `f

GROUND SURFACE
LS OF .CONSTRUCTION
Date Completed /I - I `/
Borehole Diameter (in.) /0 -1ti
Type and Size of Casing (in.) 4i -t;4 Rl C
Type and Size of Screen (in.) et-ii4
Screen Perforation Diameter (in.) CJ, C')._O
Screen Length (ft.) 1 9. `3
Centralizer Depths (ft.)
Completion Technique:
1) Type of Filter Pack and Placement
Method %
2) Type of Bentonite and Placement Method
3) Type of Grout Mixture and Placement
Method 11
iti^711<sx t Lcls'elpA0. 1zuilc 12u d4
Description of Potential Problems ith Weil:

Development Technique
Attachment B
HYDROGEOLOGIST ,41 /Crt / D: of c 4
DRILLER VCt/fey �I.)e I b, -c (!rrt,
DATE/TIME Jl — tr � `i C� /06'0
Well Head Elevation 23 6, 1
Ground Surface Elev. 23t,. =1 Z
Well �t-Head��CC�ompletion Method
`Trot t `c be
Drillin g Method/Rig Type
/-em / 4 ee) Rex
Surface Casing: Type 4!/9
Diameter '"
Length

MATERIALS
Cement (sks.) Z Sk s
Filter Pack Material (ft?) /2...5k
Casing Material (ft.) 3O C)
Bentonite (ft.3) .. 5A 5
Top of Bentonite Seal 5. 3 ft.

Top of Filter Pack 7. S ft.

Top of Screen CI5 ft.

Bottom of Screen 2. ct , ( ft.

Bottom of Hole '�(t,v ft.

NOTE: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

ERC
Environrner .
and Energy
Services Co.

JOB NO. 3`i 3 -(f . OO t
CLIENT E Y11C0
WELL LOCATION 5 E hl CO

GROUND SURFACE
DETAILS O.= CQNSTRL..0
lON
Date Completed l/
Borehole Diameter (in.) _le, -1(t
Type and Size of Casing (in.) H _r n 'PO C
Type and Size of Screen (in.) 'I-r� 'U[_
Screen Perforation Diameter (in.) O. 0 Z..&
Screen Length (ft.) '.2_ 0 .

Centralizer Depths (ft.) VA, -- ,
Completion Technique:
1) Type of Filter Pack and Placement
Method
3L.571 C3kt S<.,,[f
Attachment B

WELL COMPLETION RECORD
WELL NO. rn Lk) S HYDROGEOLOGIST /� ! I Ci't / b i ric- its

DRILLER J
1alic i LL)Ct(rrl�4-t lik:1,1
DATE/TIME II I - e `7 (2.s / 3 ( 0
�c w c:; I {,
Tr -em rx ► e
2) Type of Bentonite and Placement Method
L'-5 rcott.i. l (114 / I rermot'-e
3) Type of Grout Mixture and Placement
Method
/7-fr /Lei 7-r c. y1� 20 b cu'int.:4-e/itiutj
Description of Potential Problems With Well:

Loci(
Development Technique
Well Head Elevation 2-'37, H v
Ground Surface Elev. 2 C '7
Well Head Completion Method
T1�a E6c 3c.

Drilling ethod/Rig Type
HC 1 L' S i't' m. /c:c 7t?X
Surface Casing: Type /V#
Diameter
Length

MATERIALS
Cement (sks.) .Z 54_5
Filter Pack Material (ft?) ) 'z 5/T.__.5
Casing Material (ft.) Z'2.5 t't
Bentonite (ft3) /..5 54
Top of Bentonite Seal I. 5 ft,
Top of Filter Pack E,. 5 ft.

Top of Screen ft.

Bottom of Screen Z8 : '? ft,
Bottom of Hole 241. 5 ft.

NOTE: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

DE
A
ERC
Environmenta.
and Energy
Services Co.

JOB NO.

CLIENT

WELL COMPLETION RECORD
5'1'3 LI I roc ( WELL NO. ! W
WELL LOCATION 5 E Ill CO

GROUND SURFACE

LS OF CONSTRUCTON
Date Completed I!' 7 -
Borehole Diameter (in.) 1 Q
Type and Size of Casing (in.) II -IA pv
Type and Size of Screen (in.) q -1 h PJ c.

Screen Perforation Diameter (in.) 0,01.-0
Screen Length (ft.) / ,
Centralizer Depths (ft.) /VA
Completion Technique:
1) Type of Filter Pack and Placement
Method
5 Leo rSl L kr
7-2,er77rhrr
2) Type of Bentonite and Placement Method
L?5��rz:reicc(ct (A&)/Tr-cmw�
3) Type of Grout Mixture and Placement
Method '
I3-y--IItdzc'T tA.,J/-5'% eo.:truj-c/ilart41'
Description of Potential Problems With WeII:

L60. I(j`ell. I
Development }Technique
zt t - 1 r. •�,
GROUT

BENTONITE

FILTER PACK
HYDROGEO� rLOGIIST
DRILLER (ja. J e9
DATETTIME )/ - . -
Attachment B
41( rt �bICYCk,
WC.
07/5
Well Head Elevation 2 3 7, 30
Ground Surface Elev. 2:3 7, '1f
WeII Head Completion Method
77--A41 gc,e5S
Drilling Method/Rig Type
, �1 • �i-rat ec Rex
Surface Casing: Type NA
Diameter
Length

MATERIALS
Cement (sks.) Z S X-5
Filter Pack Material (ft3) .

Casing Material (ft) 2C 5
Bentonite (ft3 ) /4, 5 > k 5
Top of Bentonite Seal Z. ft.

Top of Filter Pack `i • ft.

Top of Screen . I ft.

Bottom of Screen f `3. '1 ft.

Bottom of Hole ..ZO. 5 ft.

NOTE: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

DETAI
ERC
Environmental
and Energy
Services Co.

JOB NO, 39`.34f/ • Go i
CLIENT 5 E C
Attachment B

WELL COMPLETION RECORD
HYDROGEOLOGIST Ad-4k.
�r�rG2S
(la 17 i:•W4/ htI��Yty�
WELL NO, MU) 7
WELL LOCATION S 1✓ ill CO •CCx-G+

GROUND SURFACE

S OF CONSTRUCTION

DRILLER
DATE/TIME Il`5-`d`t 1/3C•
Date Completed II - 3 -- `t
Borehole Diameter (in.) 16.1t:t
Type and Size of Casing (in.) .`f -1v1 PPtr'L
Type and Size of Screen (in.) 4- f r% PVC
Screen Perforation Diameter (in.) • 02 O
Screen Length (ft.) _:9
Centralizer Depths (ft) NAT, , —
Completion Technique:
1) Type of Filter Pack and Placement
Method
40) c.5 ictir 5414j
Tr -c. mptt
2) Type of Bentonite and Placement Method
CS G vt.1n rl lte.t lJ4 /7-TriArki f•
3) Type of Grout Mixture and Placement
Method
7q1 '/s4?L �,� ' I/G► <ss+� 4
Description of Potential Problems With Well:
•
4•,
Development Technique
GROUT

BENTONITE

FILTER PACK
Well Head Elevation Z 3 7.5 (o
Ground Surface Elev. 2 3 1
Well Head Completion Method
PL -1.

Drilling Method/Rig Type/ / c I 414* .`7 t' C��� � ec, lZCx Surface Casing: Type N4
Diameter
Length

MATERIALS
Cement (sks.) 'Z S k S
Filter Pack Materiai (ft 3) 115k s
Casing Material (ft.) 'Z 19 •k f
Bentonite (ft3 ) .514..s
Top of Bentonite Seal. 1,--C ft.

Top of Filter Pack 9 U ft.

Top of Screen S H ft.

Bottom of Screen ;LM ( ft.

Bottom of Hole ? . t.)) ft,
NOTE: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

Atoi ERC
Environmental
and Energy
Services Co.

JOB NO. 393 _1 :(,>o
CLIENT 5E atC C�

WELL COMPLETION RECORD
WELL NO. FYI U.123
WELL LOCATION SC1)1CO f czcr 11YTf

GROUND SURFACE
DETAILS OF CONSTRLCTIOry
Date Completed
Borehole Diameter (in.) (
Type and Size of Casing (in.) q-f&k PVC
Type and Size of Screen (in.) `{-fnc k -NC
Screen Perforation Diameter (in.) c' 0 '-O
Screen Length (ft.) 2-O . I
Centralizer Depths (ft) Nf3 , ,` ,
Completion Technique:
1) Type of Filter Pack and Placement
Method
3 e54-4„+- / Ti-etri nt t -(
2) Type of Bentonite (/and Placement Method
L`S 6v'ciKcLleit.01,Ac.)/ % rer►tnf E +
3) Type of Grout Mixture and Placement
Method
Rfit-'4444,-.1 Try.e7r I.4,7 59 ke/
Description of Potential Problems With Well:
r• i 2-e 6
11 Development Technique
Attachment B
HYDROGEOLOGIST / (e n t b i C rc k
r I
DRILLER Ucc_ l CO rt i lire
DATEJTIME II " 3 V G.I / `1 S
•
Well Head Elevation Z 3 G -0
Ground Surface Elev. 2'3(. (a ?
Well Head Completion Method
(41'(2
Drilling Method/Rig Type
Surface Casing: Type Nei)
Diameter
Length —

MATERIALS
Cement (sks.) 2 . k 5
Filter Pack Material (ft 3) 11'5 >�
Casing Material (ft.) 25. 5
Bentonite (ft3) 2 5 k
Top of Bentonite Seal- 2 . it,
Top of Filter Pack `- • S ft.

Top of Screen Li • 7 ft.

Bottom of Screen 2- `'j. S ft.

Bottom of Hole ,L 5,S' ft,
NOTE,: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

ERC
" Environment,
and Energy
Services Co.

JOB NO.

CLIENT
E;A\co
Attachment B

WELL COMPLETION RECORD
WELL NO. q HYDROGEOLOGIST iJ 1 I eh / 1b ir'rc k
DRILLER 1{C2 t' l ( \D A 1
DATE/TIME // -S-89 C 1 i, .3 c
WELL LOCATION .5 E YIN

GROUND SURFACE

DETAILS OF CONSTRUCTION
Date Completed // - 3 — e `)
Borehole Diameter (in,) 1 O
Type and Size of Casing (in.) q ?1../L
Type and Size of Screen (in.) 4-(v&G1n PvC
Screen Perforation Diameter (in.) 0,01_ D
Screen Length (ft.) 2 4 ,
Centralizer Depths (ft.) NA , '
Completion Technique:
1) Type of Filter Pack and Placement
Method
# e5-11ec r 7-r evilotr -e
2) Type of Bentonite and Placement Method
5,±1 it 44 LA /1/eL 7I`Cisl�v� {
3) Type of Grout Mixture and Placement
Method (tir,uci1
w/5 '2c bey c` : Le
Description of Potential Problems With Well:

Development Technique
d(17,1
�¢ll
r --
Well Head Elevation 2 3 G:. 32,
Ground Surface Elev. z 3 (,, 7 `t
Well Head Completion Method
7 r72 b�;x
Drilling Method/Rig Type
iolLco ke,K
Surface Casing: Type Ali
Diameter
Length

MATERIALS
Cement (sks.) 5 % 5
Filter Pack Material (ft3) 1/ 5/r s
Casing Material (ft.) ;ZS_ c >t}
Bentonite (ft: ) 2. k
Top of Bentonite Seal /..7 ft.

Top of Filter Pack `).. CI ft.

Top of Screen 'iii 7 ft,
Bottom of Screen 2 `1 ft.

Bottom of Hole Z S. y_ ft.

NOTE: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

ERC
Environmental
and Energy
Services Co.

WELL COMPLETION RECORD
JOB NO. S 005 7.00' � WELL NO. ) u) iO
CLIENT ,3 6-01 LLB ((
WELL LOCATION ��tw Lt. rV I1 Ct Y -t ,
•

GROUND SURFACE

DETAILS OF CONSTRUCTION
Date Completed _2') 0
Borehole Diameter (in.) l (f.) -I Vt
Type and Size of Casing (in.) 'l1t PV
Type and Size of Screen (in.) y - Out ?1/4/ C..

Screen Perforation Diameter (in.) O
Screen Length (ft.) Li5 --V t
-Centralizer Depths (ft.) N!
Completion Technique:
1) Type of Filter Pack and Placement
Method
/,'z. Leta C s 4-a / Tr{ rn -c
2) Type of Bentonite and Placement Method
I/y -ill vvpht, Lic-1-sl 'ren4n4t-€
3) Type of Grout Mixture and Placement
Method
Voicla46-fvrk wi 5 1.16 por4letu,V1-
Description of Potential Problems With Well:

Development Technique
.12
Attachment B
HYDROGEOLOGIST _� J �►� V' . k 5
DRILLERAc¢. [ l eJ 1,0 C,..(
DATE/TIME - 4 3 C
Well Head Elevation
Ground Surface Elev.

Well Head Completion Method
Drilling Method/Rig Type
L ect-c�c / 1`/ 4 ,
Surface Casing: Type /VI4
Diameter .

Length —

MATERIALS L
Cement (sks.) 3� 5 .ecvLC v - e.

Filter Pack Material (ft )
Casing Material (ft.) 5 G -f f
Bentonite (ft3) Ji 5%5
Top of Bentonite Seaf 2-7. 5 ft.

Top of Filter Pack 3 i. O ft.

Top of Screen 5 3. C. ft.

Bottom of Screen 3-7- S ft.

Bottom of Hole .S` . C ft.

NOTE: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

ERC
Environmental
and Energy
Services Co.

WELL COMPLETION RECORD
Attachment B
JOB NO. Sls"C 5 7.-cC"(_ WELL NO. TU r 1 1 HYDROGEOLOGIST C V I Pvz:iC5 1f
CLIENT 5 r fr l C d DRILLER U LL 1 -Qj W JL i
WELL LOCATION .7ci 1211rla DATE/TIME 2- 2 -q0 e D 0'5

GROUND SURFACE

DETAILS OF CONSTRUCTION
Date Completed '2.' 2-' D
Borehole Diameter (in.) (,E /✓1 ,f
Type and Size of Casing (in.) �{-j v► f�. L
Type and Size of Screen (in.) v\ Pv .

Screen Perforation Diameter (in.)
Screen Length (ft.)
Centralizer Depths (ft.) /vt><, '- , —
Completion Technique:
1) Type of Filter Pack and Placement
Method -
l
#t2 /ice KNLe3 / fre.vt/N,L-P
2) Type off Bentonite and Placement Method
/Ii°cL 7A'1"rLv^lG 01,4;f1-4
3) Type of Grout Mixture and Placement
Me hod
qq
Description of Potential Problems With We I:

Development Technique
•
f'
\.

Well Head Elevation
Ground Surface Elev.

Well Head Completion Method
Drillin Method/Rig Type
Surface Casing: Type /V -"/Q
Diameter —
Length

MATERIALS
Cement (sks.) 3`i/t5 eci4ec,-SL-
Filter Pack Material (ft3)
Casing Material (ft.) :2 '
Bentonite (ft3 ) 2 ..5 iv, ,7
Top of Bentonite Seat 7-- l.^ ft.

Top of Filter Pack 7. 2.. ft.

Top of Screen Ct '% ft.

Bottom of Screen _i ` ft.

Bottom of Hole 2©_ C ft.

NOTE: ALL DEPTHS AREREFERENCED TO GROUND SURFACE

ERC
Environmental
and Energy
Services Co.
3RING NUMBER AVI3 2. 2 -

FIELD LOG OF BORING
Attachment B
SHEET f OF

IOJECT NAME
scm co

PROJECT NUMBER
3 ei, s7.

ELEVATION AND DATUM

LOCATION
2-934, z 4 /I) elaJ.
uralLl N ,COMPANY
V" 1 i "e! We // 7);4/ ii,e

DRILLER /
Rowe;

DATE AND TIME STARTED
11 Lc v" '2-I - Ot o
DATE AND TIME_COMPLETED
2-I -`J O & / 2
3ILLING Efl IPMENT I
� IZe_T-s o c

DRILLING METHOD
/4L o 51 -ems
COMPLETION D€PTH
'2 -0 -%/Z -f-
TOTAL NO. OF SAMPLES

SIZE AND TYPE OF BIT
8 -IN 4..0 &.

HOLE DIAMETER
t✓-(ik
NO. OF

SAMPLES
BULK
2,
SS
Z
DRIVE

PITCHER

TILLING FLUID
n Un t

ANGLE,'

DRILLING ANGLE,'
WATER
LEVEL
FIRST

AFTEA HOURS
i
"1' 2_

I SAMPLE HAMMER
fPE htin
/ //
tC-d ` 6.l DRNINGWT. Ilia DROP 30--Jk

HYDROGEOL OGST/ DATE
CLM> / z-1 -q o

CHECKED BY/ DATE ,
-( ` '''
DEPTH
W
w

DESCRIPTION
N p

ESTIMATED

PERCENT OF

COMMENTS
zO
(FEET)
D
tan
$
¢
O3
CO o
8 i
m
GR
SA
Fl
Z
•
3 B ► 1 5 I l`c la Li c.`. 4 4 ? lA:tz �'�
t�
�c�
10 q
-
.
tU� L W a''v-li 1 K �. I S UvitZ t.." 4
b
I
�
$v" -e a4__ a, - on.

SP
q
t 0
l0
/I
•

12. 13
'Y

' • ERC
• Environmental
and Energy
Services Co.

FIELD LOG OF BORING (CONTINUED)
BORING NUMBER ^,i�p 7.7
Attachment B
SHEET _a_OF
Y
z

SAMPLES I
}cc
$
cc
BLOW
COUNT

DESCRIPTION
USCS
SYMBOL

ESTIMATED

PERCENT OF

COMMENTS
GR
SA
Fl
ffiS
Is
®
14, 3Z
,keet-o,6'-itlr�.ic joucsL r%� fLixr(r�•
LIb
of ..

I7
Ib
ty
z)
1 e3
a, --ex .. 6t,L ,u si l-1- 14,i
$4L
/
,�y
)1 4 e:

L I
JJj�
w, a i. hl I it!" e- .4/-414 6i 1 u ei f:5c%4^G
.z.2
t'Vii`!-,,T
. � c j.7scL, /'
23 ERC
Environmental
and Energy
Services Co.

JOB NO 3c -`,0S CO i

WELL COMPLETION RECORD
WELL NO. h/t1.:) HYDROGEOLOGIST
CLIENT Efl C DRILLER •Va., i1
WELL LOCATION 5ggn L Ina e-i`
z DATE/TIME 2 -2/

GROUND SURFACE

DETAILS OF CONSTRUCTION
Date Completed Z' z 1 —
Borehole Diameter (in.) L G -1N.r L..

Type and Size of Casing (in.) `i - i A C_
Type and Size of Screen (in.) 1 -i h Ptl C
Screen Perforation Diameter (in.) (0: C. I C
Screen Length (ft.) 15; 5
Centralizer Depths (ft.)71(# , _ , —
Completion Technique:
1) Type of Filter Pack and Placement
Method
L 1- eCe 5 i-et t; Tr -2
2) Type of Bentonite and Placement Method
t4t-+4 �l1 tr lu., C14113 J Tr C.
3) Type of Grout Mixture and Placement
Method
e (ALI t /5o
Description of)6otential Problems With Well:

Development Technique
GROUT

BE,NTONITE

FILTER PACK
Attachment B
� a si==. i f' 4 c• it. 5_
weir! 1 .1c`{l
-C C
Well Head Elevation
Ground Surface Elev.

Well Head Completion Method
Drilling. Method/Rig Type
ite r
Ad)
Surface Casing: Type Ad)
Diameter
Length

MATERIALS
Cement (sks.) 2. 5 k c c-ncve
Filter Pack Material (ft3) 6.i sfc .

Casing Material (ft.) 'Z 5. S '
Bentonite (ft3_) .3 fC 5
Top of Bentonite Seat 3.: C. ft.

Top of Filter Pack .7, L) ft.

Top of Screen qs I ft.

Bottom of Screen 2 4,. (G ft.

Bottom of Hole ';1.. S. 5 ft.

NOTE: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

ERC
i Environmental
and Energy
Services Co.

MW -12)
)RING NUMBER !v /I,�B z 7 J

FIELD LOG OF BORING
Attachment B
SHEET I OF__

IOJECT NAME
ScMCO

PROJECT NUMBER
3crz 7,CieD s

ELEVATION AND DATUM

LOCATION
z.936 r>lCS €Iu
f
I DH %O MPA�NY1 Well
V lt°4 l.Ve�[ r��l�ty

DRILLER /
806,61

DATE AND TIME STARTED
2-2 I -toe Ic. 1
DATE AND TIME.COMPLETED
2- 1-5-4)02- /l3 I z- 2 / - dL 6

CHECKED BY/ DATE
_',1 , I : r.

Ig
o
PT
DEPTH

SAMPLES

RECOVERY
BLOW
COUNT
/
USCS

SYMBOL I

ESTIMATED

PERCENT OF

COMMENTS
O
� FEET)

DESCRIPTION
GR
SA
Fl
r6
-IA c AA, ere.. •
I1
1 ,14,1- 76 V b1. 3 `YW..C:' 6Az,kiztLi1—
,,>
Vie,
ICs
Z
9 Iw�cP 5.4-64..cit , well -5(/r..I— c
J
Ic-flameI ) Mi. Lr✓% 1W i iLG4— -} i / J(c L� j•
//,
3 I
y
/c9 )
5 7
Sa 14.-e ,A4. aAncx.I.c. em, L u. 41J I%r,
.5e
95 S
415 Z 7 -
P .�% v -e S�-c
6 NJ
LG
I
2 I
cg
._
ii
I
iv.5'0
I
io
Ix
to
I
B _ __ - a�.-e. et/ Let/ -4.- kr p

5 e'
45 5
,v ' 2. 7 - -
/
i5
i 4
�4--
/1 G
I
1 ----_
Z
I
13 4-
•
I
Y

ERC
Environmental
and Energy
Services Co.

BORING NUMBER iy57 7 I

FIELD LOG OF BORING (CONTINUED)
Attachment B
SST _ 2. OF 2-

LRHOLOGY
DEPTH
(FEET)

SAMPLES

RECOVERY
BLOW
COUNT

DESCRIPTION
USCS
SYMBOL

ESTIMATED

PERCENT OF

COMMENTS
GR
SA
Fl
7 1 v - s1. 1 4.a_ it rL-e,
s,7
755
l!oz(
l
243
1327- 3
6 I7
I6
t'
zQ
iti5
r?
6v -h , C 44r_ 6I .!- � �ZG v�1/ -ice. -
mac.

Zcr
(-CC
1117-41 -7.— e{
.Z 1
3 U
_z c%��. - -Iv-a r I tcr.�
)
48 VL(741 -ee,../.‘-�- l_-� s �c «, �a.,n..�J .sue
�,-I
Q
S014

l.nvirr)I!U!CI!I
and Energy
Services Co.

WELL COMPLETION RECORD
Attachment B
JOB NO
CL ENI
V'Ei_L LOCATION

GROUND SURFACE

DETAILS OF CONSTRUCTION
Date Completed
YDI-406i_ OLC
DRILLE_N
DATEIf IMB
Borehole Diameter (in.)
Type and Size of Casing (in ) 211 Sc., t-{_
Type and Size of Screen (ir; 't
Screen Perforation Diameter (,n.) O •02O
Screen Length (ft.) 1 g - 9 CU
Centralizer Depths (ft.)
Completion Technique:
1) Type of Filter Pack and Placement
Method
1--IQs-f , r 4-3 II Poo r roil (rl a vq t.
2) Type of Bentonite and Placement t hod U
nV�t7l lv c ps prior" -4°`z'
3) Type of Grut Mixture and Placement
Method
Description of Potential Problems With Well
A- dr1 i,,yt1/ •
Development Technique
Ai rV
GROUT

BENTONITE

FILTER PACK
-n.15

20.50 . LAO
CC
Well Head Elevation
Ground Surface Hey
Well Head Completion t,1e:hoct
Drilling Method!Rig Type
)-V5ft Obi! Z.

Surface asing: Type
Diameter
Lera;h

MATERIALS
Cement (sks.)
Filter Pack Material (ft `" )
Casing Material (ft) t -'t C
Bentonite (ft. ) 2
Top of Bentonite Seat t l • 20 ft.

Top of Filter Pack
Top of Screen 20 • 5 G ft.

Bottom of Screen 39 -Li C-) ft.

Bottom of Hole 41 • 0. ft.

NOTE: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

mib7 Environmental
and Energy
Services Co.

FIELD LOG OF BORING
Attachment B
BORING NUMBER i { z 3 q
SHEET_LOF 3

PROJECT NAME
r►i [` o

PROJECT NUMBER
:2)(3 O 5 "7 oo l

ELEVATION AND DATUM

LOCATION

DRILLING COMPANY
/Alle l�IFLL

DRILLER
i� Dbttl

DATE AND TIME STARTED
sf30:I b R II:31

DATE AND TIME COMPLETED
5-_/;,o C t;�,�o
DRILLING MU!
Bto1

DRILLING METHOD
NSA

COMPLETION DEPTH
yo'
TOTAL NO. OFSAMPLES
S"

SIZE AND TYPE OF BIT
7 I1

HOLE DIAMETER
7 it
NO.OF

SAMPLES
BULK
SS r
...

DRIVE

PITCHER

DRILLING FLUID

DRILLING ANGLE
WATER
FIRST

AFTER HOURS
/-) o ,-1 e
0 LEVEL

SAMPLE HAMMER
TYPE U. y,%,,..3
,.� , DRIVING WT. j q b lb DROP 0 J!

HYDROGEOLOGISTI DATE
G 44 it P C. y-/-10 i 90

CHECKED BY/ DATE
r
O
DEPTH
07 i
>-

8g

DESCRIPTION

ESTIMATED

PERCENT OF

COMMENTS
-+
(FEET)
$
g
y
GR
SA
Fl
1 L
3 4
5-
6 7
5 1
I
11 �+
to O 4,,4 al o. y e 1 ri e t) S» n a)
jyc
yo
i 0
, ,e s ,"
IL

2.9• -T/inI
�ov^I) +Jett 51�rtPr)
t4T 39-1
ZS-
J
5 Pr h
rt 0 Gt. � 00 o ,,,
13 pi
J. G e.O -C- h
14 NNW 4,v�ruumeuda�
and Energy
Services Co.

FIELD LOG OF BORING (CON l"INUED)
Attachment B
BORING NUMBER Ni B 3 9
SHEET OF 3
§
d
d
DEPTH
(FEET) DESCRIPTION
W
y

RECOVERY
BLOW
COUNT
USCS
SYMBOL

ESTIMATED

PERCENT OF
GR
SA
FI

COMMENTS
IL
`~t
10 19
20 4
511 i.-;-‘-ty Si 1#y pier) 5AnJ
ip
S
I2=ov
10 (..)/ SarvtE. Vet'y -f% fie. 5A-nc.`.fi3J
t 39— Z_
Z1
X
Z?)
Loose 51Irk�.F\y tSe,,
-4 t.1 tt. . -zoo ?7m
7 ('-,e0..Net,.

Z2
7-3
214
15 Zb
17 2.
29 30
8 _S11 i-v{1y 0.1.6.vey rne.)64nel .5i1'
Is
s
►Z1 17
1i.
4J/inn," (2 T►no n 2
NZ 9-3
3i
31 13:2-\\ S1I 1,-,,,41y InotsL
t7
mo17 --wCN 60 rte.() 1'n€cl4 ti@ SArlits?
'5
J' -
3a
31 s t 1+y Ai- .+° p be c o n, I., t C Ly Q/

1.°
"05-
34 cx k boo r..,

3.g
/44
sit&h-kiy 31)-1-V fine .siahA) 0,y .s?
fs'
s
13: 2.4
re k) r Qc as a
43 3y
s
�b cv, ) L -t- +0? 6 " L,.,) c t$-. `70 5,1" SPAN

6.5-
tS
13 : z t3
141
14tJU- ti an

cuvirunmeuial
and Energy
Services Co.

Attachment B

FIELD LOG OF BORING (CONTINUED
BORING NUMBER ,i Q 3,3
SHEET OF -1
iy
o
E
-+
DEPTH
(FEET)

ISAMPLES
a.
>
S
y
O
m 8

DESCRIPTION
LISCS
SYMBOL

ESTIMATED

PERCENTOF

COMMENTS
GR
SA
Fl
3i.
4 AIL lei Sas £P ahc,tP pr() meC)fjf
90 ID
13 :40
77 5iCinc), a/Ion pi GoeIASO(-VPc)
..p
37 S
38 It)

0.27.`7,t° n oe-Avi.se
r I
ten)
Is
_D\Av)
brat ,,
.1
0 aR.44,, e. s, r -t -y oic.y
eL
Pc)
,v 40
t
, 4rh., 1> i � A < c
N tt_. zQ p
y-0

17.-
)

2.1-
I
LH-
4S

,+xi C TA
Environment:
and Energy
Services Co,

HELL COMPLETION RECORD
Attachment B
JOB NO .300 J 00
CLIENT O'Y\C-6

WELL LOCATION

GROUND SURFACE

DETAILS OF CONSTRUCTION
Date Completed
-1-yo
Borehole Diameter (in.) 7
Type and Size of Casing (in.) g _ 5ch
Type and Size of Screen (in.) " SC#1
Screen Perforation Diameter (in.) O.O2,
Screen Length (ft_)
2©
Centralizer Depths (ft )
Completion Technique:
1) Type of Filter Pack and Placement
Method
Laet5; r
-141 r Ugg}l G
crS
2) Type of Bentonite and Placement Method
art \-6115 ``(� a C- 5) f o u r
3) Type of Gro
Mixture
e and Placement
Method
e>exvt"Crr t -(P G aNk.* V._00 Citai fr} ) four
Description of Potential Problems With Well:
l

t_Ft; Rbbrr1 CO rI .1
DAT[/Tl .1E_._
Well Head Elevation 3 1 .:

Ground Surface Flev • 29
well Head Compet on h"ethod
Traf(; ce0)
Drilling Method'Rig Type
Surface Casing: Type _
Diameter
t enc?h

MATERIALS
i
Cement (sks.) 2 Q2._
Filter Pack Material (f13) L/ 4"172
Casing Material (ft.) 25
Bentonite (ft3) I Vz b u g S
Top of Bentonite Seal. /5. 3 ft.

Topof Filter Pack 2 3 ft.

Top of Screen ,7 . CP5 ft.
a 5 Bottom of Screen 4 5.4' 5 ft.
:5 Bottom of Hole 41 - 25 h.

NOTE: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

!'�I Environmental
and Energy
Services CO.

FIELD LOG OF BORING
Attachment B
BORING NUMBER Li 3 36
SHEET ! OF 3

PROJECT NAME
-.E.rnCO

PROJECT NUMBER
.30067 co I

ELEVATION AND DATUM

LOCATION

DRILLING COMPANY
V ALL ) Et c..

DRILLER
�i o3/k1

DATE AND STARTED
5/300 7A 5

DATE AND TIME COMPLETED
.30/9 Q q'4 0

DRILLING EQUIPMENT
t3-to1

DRILLING METHOD
H 3 A

COMPLETION DEPTH
TOTAL NO. OF SAMPLES

SIZE AND TYPE OF BIT
7 HOLE DIAMETER
7'
NO. OF

SAMPLES
BULK
SS
DRIVE

PITCHER

DRILLING FLUID

DRILLING ANGLE
WATER
FIRST

AFTER HOURS
4J o kJ C
LEVEL
SAMPLE
TYPE
HAMMER l/
/v\A,u (.1 AL DRIVING wT. 140 lb DROP 30

HYDROGEOLOGIST / DATE
EAA 1 -/PC 5/_30/10

CHECKED BY /DATE
DEPTH
N
¢
8 g g

DESCRIPTION
m

ESTIMATED

PERCENT OF
N
¢
m 5
y
GR
SA
FI

COMMENTS
A3P/4ALT 3"
2 3
4 5
7 8
5 l0
5 3., Rccav&,2Y
807
10 FF,vE- mt..D _..5AAJD Y CLAY
CI -
5 %-
I /
ID
73Ro AJ , moo . Pc.A57-/C.

Hklc,l
ToPL.43r/C . (milP TO ._3O 6
,er
I a
5/LTA ,jc-, ODOR.
/3
►4

Niszir Environmental
and Energy
Services Co.

Attachment B

FIELD LOG OF BORING (CONTI
1 BORING NUMBER /`' I ` 8 3

SHEET 1R OF -3
8 d
DEPTH

SAMPLES

RECOVERY
fl 0
Ed

DESCRIPTION
8 'I'
mr
N

ESTIMATED

PERCENT OF
GR
SA
FI

COMMENTS
S
A4.,.rElz,uAr,jrt, I-0- .
/e
t i
tT
. .ie,r—/TLY CLAYE.Y W.A.J D, 6/LTY
/5c
HILIGi = 50
11 3p1.iD, 11k(f) f 5iLr FWE- -
Kit
pp,>7
/ 7
rrE.D Ge.
0 -3" 10/ CuAY .y ..*LID 1.Y5c
'8
-5-!v'' 3,LTY 541,10
4,-ic 3,Lr y Cr_AvEy SAAJD
/'1
3,LT y dial D - :5.64JDy S►L.r
Ac
3 ALTER iu A rs ,v L C. e.ft-1 e. o f
7 1:)
y
/O
815
/3
5,Lrl .5ismD cµ0 CLAye_Y Aup,
y-5
6)
r-//it,it - SOffm
/ C9c2
e._CX-/ '- 412E L to44 At AA -1 es Gtr, Y -
.5.
r340w/J Age_ .. . rY, (,)2fY Akt ('LAVrY.
as
Plc° •5/14(0 co ej C. =`)04-7-tr)
.43
A4
a5
a4,,
7 b
3o
`?
> A C3o'/E_ 7-r/o t,r6r-t 6/ a D,Edz
5P
95 5
8 ' 2
,a
Corr `o��
H/Lice = 201010,1,
31 as
14 /q6 ABJYF APtZ t_ Sorere.D .5P
95 5
8' 3c2
27 Rocx,u ot_o :SAM() M 6Xia,kr. .
40 m. u n L F, ti.t e s, DA m P
33 A d y�, Dan -5P X55
1 m
1/4-05
34 -34:,-
1D

Environmental
and Energy
Services Co.

FIELD LOG OF BORING (CONTINUED)
Attachment B
BORING NUMBER AJ6 38
SHEET 3 OF -3
}
E
DI
m

IRECOVERY
0 g

DESCRIPTION

ESTIMATED

PERCENT OF
��O
FEET)
'

COMMENTS
-J
N
m8
y
GR
SA
Fl
37 _Ye
39 90
Li1
42 7
37 ,3LI IaHTL:d o,L_ T Y Fi lJ s -(L.L.

RTrn
A� 4())41/E mo2L zSlL7 , Dken R
�P 95 J B.'s
3 90
/0
N Li u Tie a c_&_.
cQ7
35 i7
3(0
P5 AfetrE ``'/ . I(__.T 70 36
0 AL16r ?Di kl DQU 5c_ C 4 Y
!n 6Au 0
n2Acvc/stir C(J y
30 C)

9.08 10`1 A3 move.
1,9
Cc_
/Cr
19 61LTy iti�. -ma) .34M D
t n P moo &JaL ,RTEC
90 etc:
(;rtvironmcnt:
and Energy
Services Co.

JOB NO 30©:S CIO)
C C.O
WELL LOCATION 4(

GROUND SURFACE

DETAI,S OF CONSTRUCTION
Date Completed

WELL COMPLETION RECORD
Borehole Diameter (in.)
Type and Size of Casing (in.) 2'I $c h 140
Type and Size o1 Screen (in ) b?'t SG�tyQ
Screen Perforation Diameter (in.) 0.02.0
Screen Length (ft.) 1 'g • 4- 5
Centralizer Depths (ft.)
Completion Technique:
1) Type of Filter Pack and Placement
Method
Loner'
� t (oUG h Cr tri t
2) Type of Bentonite and Placement Method
L NO rn w I
CAI g rn
5c 3-4-1/4-:
3 3) Type of Grout Mixture and Placement
Method &Pit-\nt- , Crindt��C t lG t1r F0O( -Prowl S
Description of Potential Problems With Well:

U
GtrLA we -11 •
Development Technique
N A'
PHOC f ( PLC:!="7,IS1
Attachment B
f RC)bi,"r .Car't-f.,
70 Weil Head Elevation 3 - aLi
Ground Surface Elev ln• ray
Well Head Completion Method
go)C
Drilling MethodiRg Type
tk pr_ _l_ Qblle_ Q-4)
Surface Casing- Type
Diameter
l_endth _

MATERIALS
Cement (sks) .2 'y2.

Filter Pack Material (ft 3) 31(2- )00
Casing Material (ft.) "I 5
Bentonite (ft3) f 7z ba
Top of Bentonite Seat tq• Ld ft.

Top of Filter Pack 2 Li • C:7 ft.

Top of Screen
.260.30 ft.

Bottom of Screen '45. 05 ft.

Bottom of Hole LI5 ft.

NOTE_ ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

it Environmental
and Energy
Services Co.

FIELD LOG OF BORING
Attachment B
BORING NUMBER N J t7

PROJECT NAME
Eit'\(1,0

DRLLUNG COMPANY
(MA4. 5
SHEET % OF -
1� cA\\e,./ WP\\

DRILJNG EQUIPMENT
Z-(Ot

SIZE AND TYPE OF BIT
7 "

PROJECT NUMBER
..210C;5—'700
DRI ER

DRILLING METHOD
1-4 5

HOLE DIAMETER
7 ,,

DRILLING ANGLE
cif

ELEVATION AND DATUM

DATE AND TIME STARTED
.s/3c/j /4:��3

COMPLETION DEPTH
LOCATION 5 O -f k>,., ' l d I n "h A Q c)
54,14
NO. OF

SAMPLES
BULK
SS

DATE AND TIME COMPLETED
57/W90 C) Js.. (7
TOTAL NO. OFSAMPLES
DRIVE

PITCHER

DRILLING FLUID
NONE

SAMPLE HAMMER
TYPE p",.rnte,vra\
DEPTH
(FEET)
DRIVING WT. 14-0 1b DROP 3 o 11

DESCRIPTION
WATER
LEVEL

HYDROGEOLOGIST/ DATE
4 4 I' C s -/30h -it
m
}

ESTIMATED

PERCENT OF
GR
SA
FI

AFTER HODS

CHECKED BY / DATE

COMMENTS
3 b
7 9
100
Ii
Iz
13 14
7 I 14 rye() well .sortec)
re,/ S q -4-v r ►4 l -e rt co.), -Jed
s?
t U 34
N 4v_t
i4

7,37 Environmental
and Energy
Services Co.

FIELD LOG OF BORING (CONTINUED
Attachment B

BORING NUMBER
A/ F) 10
SHEET Z OF 3.
_
DEPTH
(FEET) 8

ISAMPLES
cc
,
w
2O
v

DESCRIPTION
N O
8 'I'
»
N

ESTIMATED

PERCENTOF
GR
SA
FI

COMMENTS
34 !%

1.7 IS
2-0
6 St14y (el A3. 6Rna
''",41
SO
sv
I4'Liz
13 ,�rawA SA-i-.JrK.'k ej
N ;3 4U ---Z.

Zi
i ci
1-+I`► l,t =
72 rte(,:-+-'

2.3 24

2.3--
Z-7
Z$
Zy
30 Piod- 0e-k\60riv' A, mej -4''Q-
5i'
"
I
N 4°--..

S4nri S"" ortrf /oo,SQ)
3,
-Pe4..)
4k...ka_ -6- A h/ S'og Orafi.se
j
3L
33 Attachment B
Environmental
and Energy
Services Co.

BORING NUMBER At it

FIELD LOG OF BORING (CONTINUED)
ii
p
DEPTH
CT)
(FEET)
co
to
1 RECOVERY
23 m S

DESCRIPTION
uses
SYMBOL

ESTIMATED

PERCENT OF

COMMENTS
GR
SA
Fl
.Sl► k+t1 ,,5I{fy f7Q/ 5(44

52.1 `--y6'5/t
/14:5-6--

w/ `r, -erteyQc 0,\ A‘, san)
N-1 4-0 —Li
.3C,
la-yer-S I rcn 5kAty /Y1br3l'
C-,e0T-e c_- wife5
37 ,
1-z. rl a t, 4 0.1e ino N-0 ., , b "
-57:75.41
1 3 `i
`T U
I.5-- f 0
C.\ c.�
Ci-
N i1 v — .
q-7
zi3
qq-
r
l;
CAe y
4,
t .i7

1'rlv irunFT1Cn`
and Energy
Services ( o_
JO[3 NO
3o05 -0o i
CLIEN1 5:_�►v C
WEI t.00ATION j cs.

GROUND SURFACE

DETAILS OF CONSTRUCTION
Dale Completed

WELL COMPLETION RECORD
WI I I_ NO rnW s Le HYD( ( ii
Gni a,41-0
CS -1 tc-+ tI L3r li TER ID; r
Borehole Diameter (in.) 7
Type and Size of Casing (in.) 2'
Type and Size of Screen On.) Z' 3c.h
Screen Perforation Diameter (in.) O• c�2
Screen Length (ft.) 1 q. Lo 2...

Centralizer Depths (ft.)
Completion Technique-
1) Type of Filter Pack and Placement
Method

1...(s n - .r
*hro try
2) Type of Bentonite and Placement Method
U V I' u
3) Type of Grout Mixture and Placement
Method
On ik Gm.fi RSr-{tundp`'r
Description of Potential Problems With Well:
cz d(j Wt,1) •
Development Technique
GROUT

BENTONITE

FILTER PACK

DATE/TIME
—t;.70
5- Lig-
Attachment B
I Veto
Well Head Elevation .2342• L4�
Ground Surface Elev (v •
Well Head Completion Method
(C4.--Cei✓ ��
Drilling Method/Rig Type
1454- al if`, _$ -La /
Surface Casing: Type __
Diameter
Length

MATERIALS
Cement (sks.) z
Filter Pack Material (f13)
Casing Material (ft.) 5
Bentonite (ft3 ) f 'rz box! S
Top of Bentonite Seat 1� • 7C) ft
Top of Filter Pack t2 Q .1 D ft.

Top of Screen
a5.ti4ft.
= 4f•CS, Bottom of Screen 45•°9 ft.
cf 5 , 5=t, Bottom of Hole 4 °-)• 5 ft.

NOTE: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

Attachment B
ERC
Time Environmental
and Energy
Services Co.

BORING NUMBER fU , U
row (42

FIELD LOG OF BORING
SHEET I OF ;%-

PROJECT NAME
S 1.`I\.C,_0

PROJECT NUMBER
- 0(:) 5-7 oaf

ELEVATION AND DATUM

LOCATION
A h A r x) t1! rka : h r1P
DRILLING COMPANY .

V A\l . y We 11

DRILLER
-Rako."

DATE AND TIME STARTED
6 /7 /`1©
`� ! oop

DATE AND TIME COMPLETED

6. /71 yn (A3 nc

DRILLING EQUIPMENT

DRILLING METHOD

COMPLETION DEPTH
TOTAL NO. OF SAMPLES

SUE AND TYPE OF BIT
7 "

HOLE DIAMETER
`7 0>
NO, OF

SAMPLES
BULK
SS .

If
DRIVE

PITCHER

DRILLING FLUID

DRILLING ANGLE
WATT
FIRST

AFTER HOURS
N One '
LEVEL

SAMPLE HAMMER
TYPE co p DRIVING WT. 140 1 b DROP 3 a //

HYDROGEOLOGIST/DATE
1 A- 4 µtom._ 6 /7/q0

CHECKED BY/DATE
>.
8 0
DEPTH

ISAMPLES

RECOVERY
O

DESCRIPTION
8 2

ESTIMATED

PERGENTOF
g COMMENTS
-�
°D $
u,
GR
SA
R
•
I,
i,
/0
12-
fq
f6
1c
20 ZZ

2.4.1i
2-6
06 SO
/n 5 1 �y 5. r) 6x-r:',.0 r, E`f- 154 t�
' r
E`.

X'
i 3 ' So L . 57---3c
�
72-
f
tr.�e t\ ScrA-Ok) <_.11ic,,.. ;)rt) IiCAkr‘S
It N LL. 7r ;-eri

ink
ca�v
70 Environmental
and Energy
Services Co.

Attachment B
BORING NUMBER 1 1 q 4

FIELD LOG OF BORING (CONTINUED)
SHEET
r
�y
O
O
�
�
DEPTH
(�
w
a

RECOVERY
BLOW
cc»I T

DESCRIPTION
USCS
SYMBOL

ESTIMATED

PERCENT OF

COMMENTS
!
GR
SA
Fl
;33
3z
-34-
i6 F
- im 6i /4y 5Anc)f 4 5 Al 0.1Q
5?
10 ►b
I G -.L0

y
q4
- ,'-1- IF..4< .5i0�- e'i5 ,.)(34-
?)s. --3
l
if I, -)LL- 76-' :'+'1
St,
38 d
3 rl (1s A haae.
6P
O
!0
i L 1 ?. tv
4e
':
2-" v�- fir! S4r y 5i t I Cary
Mt.-
2c, 1
-7 a. Sj LLvi
i3/ /o7c; 014\,/
,+ t't-= 0pnrn
liz
if
/-13°
" sP
5P
iG : '?,4 4 3-S-`4
.o
1-0

ERCE

WELL COMPLETION RECORD
Attachment B
JOB NO. 30 2.75.001

CLIENT SEMCO
WELL NO. DM
WELL LOCATIONJah4a QriGt ) CA •

GROUND SURFACE

DETAILS OF CONSTRUCTION
Date Completed if- 3 0 - 90
Borehole Diameter (in.) 10 -
Type and Size of Casing (in.) CC?
Type and Size of Screen (in.) 55'11
•
-tv►
Screen Perforation Diameter (in.) b .024
Screen Length (ft.) 2..0.OO
Centralizer Depths (ft.) -- ,
Completion Technique:
1) Type of Fitter Pack and Placement
Method
3 l avi ca t--/
2) Type of Bentonite and Placement Method
"FrehItvti -E
3) Type of Grout Mixture and Placement
Method /
Description of Potential Problems With Well:
,,1 L � iuc> Ccorioavn.
"5S ri n
S ^Fq
Development Technique

4.wt 5ttv�; e

HYDROGEOLOGIST
DRILLER `-A t� r►e
C. D;ere ks
Ehtit rot\meMria+..(
DATE/TIME //-Z'-90 40 11-30-9O
2: ooh,,,
/45;004 rk
Well Head Elevation 2..b7.

Ground Surface Elev.237.g0
Well Head Completion Method
Tra-c-gg e f3 arc
Drilling Method/Rig Type
—D 14.&( 4u1e/Dri IIsy,4e+vis
Surface Casing: Type ,4t4
Diameter —
Length

MATERIALS
Cement (sks.) "4g.Sc cr-,L..�_
Filter Pack Material (ft3) S. 6
Casing Material (ft.) 2.1 0
Bentonite (ft3) 1.3&1
Top of Bentonite Seat /430.24 ft.

Top of Filter Pack 186,2$ ft.

Top of Screen 18$.00 ft.

Bottom of Screen 2OS. 0 ft.

Bottom of Hole .. t e . O ft.

NOTE: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

kgs° ERCE
Attachment B

FIELD LOG OF BORING
BORING NUMBER pM.'L

SHEET OF '

PROJECT NAME
5EMC©-beep Atoit'eAr 2 -Kw.

PROJECT NUMBER
302 r 73.00

ELEVATION AND DATUM
LOCATION Ssa #A s•f
se%11ieim 84c;41i%il

DRILLING COMPANY
r'.c�\in� Fnvironrxew> TarITC DRIVING WT. /10-i6 DROP 3O-Ih

HYDROGEOLOGIST/ DATE
Dlere.k$ /l1/.$ -4n

CHECKED BY/ DATE
DEPTH
W
>
„§

DESCRIPTION
a,

ESTIMATED
p PERCENT OF
(FEET)
(158.$)
a
0 ' cc
g
m 0
' >
an
GR
SA
Fl

COMMENTS
1 2.
4/
6 ' we..to
5P
9S
S
8 sco.a- (.4.4+1A. Y4IH.hr` si 14, liq-e
1 D
ht,,r 5,4; cso s.G. .
12 Iel
A7ri e- ,L , ht edimAyt- leapt' c.P s.x►,Q,
Sc
$s
is
!o'a e 107 g % si /01
16 I
ev;1 ` . S/ I .e 1rrWr1/ Lu.i.s4,
J
d -G► Je sato-
i8
r
sa►,d 5; 14 ct , Pl fLc, me,
GL
2575

2©
� rm j 1 v j 1+-0(5 r kutn Qe-
v�r-a .-.e 6 frcini�-- .
///
.
22 Sw4..t out_ 114 — l it?' .4ee."f-•
-
'70
10 2N

5.e
[LA..)
ik CiQi1 — 4-a coetuk-1 raerKaPs?
9'S
S
sue. .J1c24' 4Zto'
2b
ssrr��
5 •e ? �'.
/€1-l ctf
ler
410 ICS

2.9 �n

BORRK1 NISraER C+M W I
7B
8o
$z
84 Sb
88 go
91-
9t/
96 78

FIELD LOG OF BORING (CONTINUED)
Attachment B

UlNUE
Attachment B

FIELD LOG OF BORING (CONTINUED
BORING NUMBER OM 1,01 I
•
SFEEr z OF 6
i ESTIMATED
DEPTH
y

DESCRIPTION
y

PERCENT OF

COMMENTS
���
y
$
IV
C
m8
N GR
SA
R

32. Sariet Jq-447{-efi
sit
le,
Ic
34 36
3a
�✓ /�'
D
,cialey 0 t 14- Yt ( Ora d•-i.c/ 'Nn.v.ta�i
AIL

/GC
)
,
r /`
6 c 0,4/ Ck , ►�►^,i in..1r ah�c: s II
C" L
Zo
Sc
Jig
f,1

G -aA ?vv.
want i a- ll- . b 1-TJ 4),,, e tt.'�
.
se_
75 25
b
dal et,� v .d r
5c
!S5 '5
N
yes
' ' '
1; II? C1 , bra., X44,,-
e/l
s 0
//SL
C'fsa.
ys SS
///:

Sy
SC
GS 35`
36 .p.c.Z.

Cl I10'' 4-04"5raozl (.v;44k.MiI.%
64 4s
ca is
BMW l-1
Se
5(.1 T�e eA s nrx-1 SOv- ,
12 50
cla,wf ."'Q
k+racot. .

MA = b ate,
`0
G2
6 6g
Z.
t
Gam- s i� i 1'kl ►v1.Av-
CL I
P 25
(.5
M W1- 2
�
�c — i a.46
CL
3b
70 11 Sit
..:1
be4
6, --iii — 'Llti Pia.5 i- -
teH
25 75
UIVl = ©/ps
d:////
,v, ratu-L
i
48 ./d
.I.,

C
t a.4 -6i4 4, rz-t to i 5 GC
-

CHU=
Attachment B
BORING NEA19ER bM W

FIELD LOG OF BORING (CONTINUED)
1 f!
1 -is -mot a
II/2R-qv
t(
Is /Uo Zee,' QO ii G 0. (5 tz, ( ;vs. 3u -o• a ea. P
, 7 2.
547 4-1-i sp env P` i
rA+L'``` Wd .“ 1v- S,..4,Wf/.4.r'1't1T.
le i 0
1►
-•r
1 D C \ V-4-4.4.-e,t t
( 6 cl
t; Q '� t
-. r_

5. zc -Lc' bate. i t _ G1

Attachment B
BORING NUMBER D % / j

FIELD LOG OF BORING (CONTINUED)
SHEET
SOF 6
'jGkti- I 1 4 -C%` -!h iv-r.6.4l Y".(tt.-
\
4r1 tNAI* ##v— Lt
r
$i 141 c-tt / ‘44-044,64,4-44 k
J
,
-P-t rVit \O IrtAttin Vvt./..ti .s •

/
GteVeln 5.A ar
5L
7d
50 14 Ail,
50 .5.444-e- 4,4-- /56 `
LAC 55
?ca
Z5

ERCE
Attachment B

WELL COMPLETION RECORD
JOB NO. 3©273.001

CLIENT SEIKO
WELL NO. DM W Z HYDROGEOLOGIST C • b tcrcks
WELL LOCATION $ctnIa Virrra C/7

GROUND SURFACE

DETAILS OF CONSTRUCTION
Date Completed /2-/-90
DRILLER Lci4M•c 6nvlrem men ha
DATE/TIME /2 - 1- 94 / 0710
Borehole Diameter (in.) /O -in
Type and Size of Casing (in.) LOG 4-/n
Type and Size of Screen (in.) SS '1-i& pr. )
Screen Perforation Diameter (in.) O. 02.0
Screen Length (ft.) 2p . C
Centralizer Depths (ft.) NA ,
Completion Technique:
1) Type of Fitter Pack and Placement
Method
3 Lay,cs�ur iri-enimt4
2) Type of Bentonite and Placement Method
'/y4" pe llt+s / TTc m -e
3) Type of Grout Mixture and Placement
Method
TrCmwti-f •
Description of Potential Problems With Well:

LOC = law Cc7.( 6p., s tee (
5 5 = 5-a0K1•tdd.. 54,e
— ceincc-, v:a a klk u u acQ
Development Technique
Purr,/ and Sure
Well Head Elevation 236.1,3
Ground Surface Elev.2.34.11
Well Head Completion Method
7'ra. �c IIGt1C
Drilling Method/Rig Type
D t..er... (41..1 e /1>/1>ra trier., s
Surface Casing: Type NA
Diameter
Length

MATERIALS
Cement (sks.) 3 sacks talcs -GL<
Filter Pack Material (ft3) 6.3
Casing Material (ft.) 200
Bentonite (ft9) 2•
Top of Bentonite Seat /6 7. 0 ft.

Top of Filter Pack ! 7q. O ft.

Top of Screen 179.0 ft.

Bottom of Screen 199.o ft.

Bottom of Hole 208.0 ft.

NOTE: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

411 ERCE
Attachment B

FIELD LOG OF BORING
BORING NUMBER D M w '
SHEET 1 OF 6

PROJECT NAME
SEMCO-beep Apsidw v.

PROJECT NUMBER
3DZ73,00 f

ELEVATION AND DATUM

LOCATION
Easf.PMar.' SaIah7

DRILLING COMPANY
Lt Ac Env/►v,1Mewl.'" Serviuv.

DRILLER
iMkrra . der

DATE AND TIME ST TED
//-30-a1 D 04 //.. 0

DATE AND TIME COMPLETED
/l -30-90 to 1545

DRILLINIG EQUIPMENT
Uri I . Sff�s AP -140 v

DRILL NG HOD
paid -'ht e f�'euersccir•c .

COMPLETION EPTH
9-04SIZE
TOTAL NO.O
AND TLY*E OF BIT / �/
/0-i i c ,� -ii 6 2 4

HOLE DIAMETER
/O .-Ih
NO.OF

SAMPLES
BULK
SS
DRIVE

PITCH ER

DRILLING FLUID

DRILLING
WATER
Fuial [as? )
AFTER 2r( HOURS
/VDylf
ILE
LEVEL
/86-7'/
-t./e6.5

SAMPLE H MER /
TYPE Au k / C DRIVING WT. 14 0 -�1 DROP 3>-1 N
HYDROGEOLOGtST/ DATE
C. 'ra, C kS//l- 3 6 -g

CHECKED BY / DATE
O
.§
DEPTH
W
w
0 j

DESCRIPTION
y
• ESTIMATED
EN g PERCENT OF
�C
J
(FEET) ¢
N
8 m 8y
GR
SA
R

COMMENTS

2. b
.we - , 1(441 6reoi.

Sit ,h41 Cite
6C
96 1 D
I
S
Lsa4C.i Gfano,1" 4a.'el6.

V
to -
sa c era-- G.h /.,-e_ (.1 sal 4,1
6 C
ao
/ v
54 ea w%
1i
/�
a na a as ' - /C4004-ra��
5C
13�
to
6 r *- .t
el- (al
19 .4
,L
.
z2
Sa n,. Z cv1.- a."1 -- L ©--h 0.--t' _6-e---
ste-t-fl
1q
i\U
2,6

2.. E3
5 le -'ovf 5
c
9'e
/©
3 D
a n.. e_ AA.--ct'j-
/ZOO ('n oerri-1

C I1Vr
BORING MUSES b M W 2+
ctt
Attachment B
SHEET
z c 6

FIELD LOG OF BORING (CONTINUED)
75 �'� r t7 Y an
0CRING NUMBER

I DEPTH
(FEET)

72. 711
76 78
Do
82 8g
04 eg
�o

92. 9"
"6
78 1D O
102
tog

FIELD LOG OF BORING (CONTINUED)

DESCRIPTION
VI( Y-�9't y` t v1G�- 7 t--4 i"hG 1l(ti 5
Kiaottt4iv� 4vet1w .?, •e -re) -C

60...-4—C. r(, l 44..44 — &o "Wen\
Attachment B
9T.3_CF 6

COMMENTS

ESTIMATED

PERCENT OF
A?c Re cover,
i2
17 4
.0%
136+
S
168
!9
w
--.y r-Rtia G
,a Le. -- -I _.
4 95

igniZ. MMI II
WRING tNUMBER Dm w

FIELD LOG OF BORING (CONTINUED)
Attachment B
VIM r Lc6

NW. -- -w N
BORING NUMMI bpi w
FIELD LOG OF BORING (CCIUaINUED)
5p
3 Attachment B
stiszr
O,6
Graze -e, .a wi nt 4(D

Attachment B
ERCE

WELL COMPLETION RECORD
JOB NO.:3O 7.. 7 3, Co 1_ WELL NO. -1.)1911.9 3_ HYDROGEOLOGIST C' E a ,cud 5 kb CLIENT S E /M do DRILLER JJ _Lay 4 En vlE`ot2T
WELL LOCATION .1 36 1Yi its 1-r-1tz..\ PIki1 DATE/TIME -0/91 C Od 'fib

GROUND SURFACE

DETAILS OF CONSTRUCTION
Date Completed 3- 9 'q
Borehole Diameter (in.) !p -1N
Type and Size of Casing (in.) )-Itn Lc C 5
Type and Size of Screen (in.) +4, s 5
Screen Perforation Diameter (in.) 0.4710 -tin
Screen Length (ft.) 2 O.O k lL
Centralizer Depths (ft.) ,
Completion Technique:
1) Type of Filter Pack and Placement
Method
Lone 5 41 41- 3/ 71-ervl l' -e
2) Type of Bentonite and Placeme t Method
'/4-IK Vv%la ialole /�Tite1st.►.e
3) Type of Grout Mixture and Pllcement
Method JJ
‘1010.1a4 &reek 1' 7 r.e% i ie 0_0.45
P Descri tioh of Potential Problems With Well:
/
,t a'Fe5
* C s = Ln.z.> ea..- %.r. .5 i-ee
4X 55 = 544i.11-614 S'ir•e(
Development Technique
5 r
1 x�Y,%Ffw9
GROUT

BENTONITE

FILTER PACK
=I67 0
=173,6
,80
Well Head Elevation
Ground Surface Elev.

Well Head Completion Method MAC. iC. acle - me .'rL
Drilling Method/Rig Type
�u�( rud e I"be-1 i ,yi.1-en4,s
Surface Casing: Type
Diameter
Length

MATERIALS
Cement (sks.) 3 s 5
Filter Pack Material (0) 5%5
Casing Material (ft.) 200-4-F.

Bentonite (ft3) 3 Ltd=
Top of Bentonite Seal % i/7 Oft.

Top of Filter Pack 173. 6 ft.

Top of Screen
%f .O ft.

Bottom of Screen 1.40C2 -Oft.

Bottom of Hole 1-6/. O ft.

NOTE: ALL DEPTHS ARE REFERENCED TO GROUND SURFACE

ERCE
Attachment B

FIELD LOG OF BORING
BORING NUMBER M, r 3
SHEET OF 6

PROJECT NAME
5 EM e 0

PROJECT NUMBER
• O z 7 3. a o 1

ELEVATION AND DATUM

LOCATION
z.9'5 4; ='.,diu A„u,( Pith
DRILLING COMPANY .

La x. I n vl l v -o i oteH. 4-a. (
DRILLER 5 � � �
DATE AND 17MQSTARTED� t 3 �
1 I
3'� AND TIME 7- 91 COMPLETED@ 3 0

DRILLNG EIQUIPMENT
1::, V4 t1 s i4 5f-c.11i

DRILLING METHOD
t -( wz.t(

COMPLETION DEPTH
2,0 I -P- -
TOTAL NO. OF SAMPLES
Y

SSE AND TYPE TT
110 --AK 4 V'9u;4- ,;ii 5 . f

HOLE DIAMETER
e- ) 0
NO. OF

SAMPLES
BULK
SS
1 DRIVE
�-

PITCHER

DRILLING FLUID
AiOiL-e

DRILLING ANGLE
WATER
LEVEL
FIRST

AFTER HOURS

SAMPLEHAMMER I
!t TYPE w^7'rf»1 )J.r DRIVING WT. i 4,10--/L DROP 3G--, {,

HYDROGEOLOGIST/ DATE
C ED/ S 1.b

CHECKED BY/ DATE
o
z
T
DEPTH
(FEET)
r

SAMPLES
[RECOVERY
BLOW
COUNT

DESCRIPTION
USCS
SYMBOL

ESTIMATED

ESTIMATED

PERCENT

COMMENTS
GR
SA
Fl
Z.

C•IGay. 41..k -c- 4a 1M.e�LL4 t-ciraDve
/
CP
I '
Set V14 t c t-� a l el - -t.--'L T �. 4-Yl lvl
1O
5,---;\7L- 11,11 11 7
Sct v1n. �(A.- 4. A.il— " 2 -c� ' <:+
.:5,
0 ."(5-
S
IZ
y
\D,rtsil vi . AAL P�`reA e (la , c,4?L`3 k rYW t ill;
ib
'4 ad e'r-a -e((i
.cow J
l8
2_ /l J. i/'i z-
SCIvIte Ll_S (1...-jr tel-..i-
`),
O
4IS
7 ZD
:Cz

2.4 (,, \ra It‘ e ,e_ ,;e4,,,_:•‘,,:, at)- -k-iv,:e..- 4-ekt(Led:4404 '- 24 el ;rain, sand ilurr-7't' , (.s
28 tnettival_-4c; e6,ny^5e-,;:,aiwc-.:(1- a6-ct„z.kL
5p
G
/6,,
c:%
3" 1141 iC //i5o

I
ERC
Environmental
and Energy
Services Co.

BORING NUMBER D 11 1 0 3

FIELD LOG OF BORING (CONTINUED)
Attachment B
SHEET :Z OF b
g ESTIMATED
o
zOz
DEPTH
(FEET)

SAMPLES

RECOVERY
BLOW .

COUNT

DESCRIPTION
USCS
SYMBOL

PERCENT OF

COMMENTS
GR
SA
Fl
-----':�
11 i Ulu -46 �u.c'iL - j r-�; A r� - atit�.�.
57 t
Ictr
f)
Via.,\ -e. N,, w.1,\ - t;‘,, ( 164,,e,

3.z
mein`(
3 3 (�
5 G
old
.//
j /
L L '
/ k ti
/
y4t(
>
.3
.; 14.., cl t. / ,t„;tAr 4 cm.ii, r nTt ,(?
n%
0 ► a
` 0
•A i�► W 3 -1
z
1 ` ieL•i e;47
I1.-�'�;. \ I is ^t,�--iy t,--L4f
1'2-0'5
;f
r'' f
h�. ocY e -c((L 4- e �'�. ,-.�s�-I� ,r vIA. - 5 crVI e r k 7 J�}- .1vt c,t: - Tr ,
,4.Z
tcv (.i+r �'r` N,l.ri t I l-{.4- •
I/� fnn
i- , s. - C, f1
/NtL
///1
C" L
/
cu ;
j //•
q6
(Ad A '`')G11'`')G1111,4{_�
5C_.
0 LC
-
n
4 e,
G
%
L.,
�'
C..\�; c � L -t4 e Ui. ct-L114-i_,
c.vi �
!O
46,
'DA -11\4; -I.
-C�
xL
i&
F
'J J 1 L
i,, )Y"C --(•fit, flrnC�'-11A ']LL^4T�LQ_
1 7 r1
J .C CS
(id r! '4-b -t- ) MIA. 6f- 3‘t-tA. A ,
tilt) aL ' (i) A r71
rvv:L4-rlX ie, GL. eL
4, .5. - '�
L
,/
51 79
op
;a
10 0 (
,v1 '
6 2`i
J J
4, 1� -' 1vt-t. % 5f. : AA >.
1'135
`l
-3 rein Wit_ 4-n ct,tD 61-e - se,tit r CAtil �)5
i�
fin = PAM
�1
r�.� ,_ i t�. i,
1 --,� 4-�`�.
=e h
N �- a,)•
Mt.

Z5
1550
j II II
s�trtcw� 0:141
IAinev- lGG7-1-C[Lf//
5 i0
"�
��
1 1 J /
�cL4 ell �G1�•�L� �I;4-��c.c
�M
`
I
.,
N lc -e r ,
l' -,c5

Attachment B
ERC
Environmental
and Energy
Services Co.

BORING NUMBER -Dm I

FIELD LOG OF BORING (CONTINUED)
SHEET 3 OF
g ESTIMATED
0 DEPTH
(FEET) DESCRIPTION

SAMPLES

RECOVERY
m8
USCS
SYMBOL

PERCENTOF

COMMENTS
GR
SA
A
,//
//
t et. \ -i",-c. It1C IV, CIr t CG
72 q
r «--C[, . ,
7 I
I-1 ., cis d L✓L'SA- C.'•c�kr"-Ji!—NiQ1r1
hevkz , 9,, 1, ,- keLti - GA at. Imo,LlS
79 v t:cee hu.9 N, Le, � -zz( (2. -;L > -c �
80 `'
7:,Ak,
Re co 0-e
G -
66c
_5,
®
I Li cc_-
zq
s'
" , nl-
OZ
U ('
Mt'cktKvl1-,'�!-cLIN2cC �ctV'k; c • tt..-�` I �E�`�
c .i)
_.
gig
..
_..
96 G J'eL:te, i, s ci N ce j cDcSk... r-ec \N‘r-c) Y1 j f�
3 0
-xi
U
6 1,1-iL;c
GZLC,,i !L.2 z. c3rY1 ,.LCD - f7A-C�`.tt
c-tx /14.5&(— ,e
70 4t
N I
6clnc; ai ,—c(..,..r' I , ,—c • ► , �a - I ems- Yc
70 �.C
i 0
�
y", fri i,c) "3 — `
ri C
1 v r
l—ect - vw tits vt 6r-7 14- 45.e,4.,
_.. ...
14 t O
9z
96 1B
too
d'
i
,,
Ai n
NO iC COv<'Wi
102.

I+
'3c2vi eky i v-ei,,-.' l WI/ i ad.4i, �'ti'`4-�'►. )
'.4.3"iS
'
.11cy,n-ck- t‘ (9 hA,e-0r-Cy1ci,�A'1. 4-an1G)Bj
Osi
/o6

Attachment B
ERC
Environmental
and Energy
Services Co.

BORING NUMBER b / w

FIELD LOG OF BORING (CONTINUED)
SHEET "I OF-
›-
.6
( DEPTH
[SAMPLES

RECOVERY
BLOW
COUNT

DESCRIPTION
USCS
SYMBOL

ESTIMATED

PERCENTOF

COMMENTS
GR
SA
R
_` ct Dx.c. ,I. 5, 1 tts Ct f, --et v -S , Y- e0Q- k1 rr_ to vk , (w 1
e
1-5
2S
is; •,, l
, ' , c l `,,t%
r , 3
lit/
5,:'nLll r4 -0-t . i-, 4-e.I 'j Pe- c, cc'LZ,'li.L

5 _J
'f :'
/»
NJ
5 I r�
A.. k
,,r'
C`,ut e91 5. lL,.
si.'
5c:
0 sp
l/
/75
/zb
.,
, r ��L�t •e s ,,4- - - I ) 6
l.V 1±it, c CLLtG ')i^I 1- cj —Gt..tJit 5i t -E:'
,3y
,-tom, �.
/36
I/ I1
- ei,\A ttj t *-cc,,-t-` / tckvL r -c A , r m fur-
-77,-;,;. a?r
o
f 3
i
h 1-> -u-
5L
20 l✓S
/s
%q
�::�LLL,J,,U
61'rtll <n.--e.G'C' 4144'Ltp`�J i'l,L, ...,.4- 1`r^GI`-= Gi l'v') . 11 ✓ ''"J ' t ..-L':n' 1-C L b ,IYiLy Y1 1 5 L Y' -e' G 13 'I/

ERC
Environmental
and Energy
Services Co.

Attachment B

FIELD LOG OF BORING (CONTINUED)
BORING NUMBER DPI 1 `_' 3 I
S41EEr OF
8 DEPTH
(FED
SAMPLES 1

RECOVERY
BLOW 1
COUNT

DESCRIPTION
USCS
SYMBOL

ESTIMATED
�- CENTOF

COMMENTS
f • /7
�`C'tkliLN. -ii ,- ✓l -)41.171.t
a! � 1.)►-t cLLs ,
•
0 55
152 1 ,�
y",ztr-
J
SFI�
13y
CA. a .F� M,.1�/4ul4„vs•_ '�yo r e•4r•r -c5•` .14�
156
ix c1�,4 A alit, v` e€t-6vt'LI�Y`1 ,to-L"271L
/59
...(1.
-\=:4) ^i 5 Gti-'tC e(. -/-C� �'D m.c-rk , l „.
t
7, l , •, , l.K •I i 1 ,;,,,,,..„,,k }� .....-,.:44;i1 c31`v _..k 16®
n1,-- Crv:.; II i, ,,L-� `f.'L'-�ITi ( I )I -r GLt
r -tai'''. tc921-•-C._-
162
ok al,. S,, l '1-�; 1 �; �-i h ,i r-4, L-G,Il
164
LcL., C'_ l \f -e. Ill, m..4, ; 1
r:;
-e bkr -ryti cv _ GC'` c\t- .
i -F-L. L S..c ,. .0 C. 1.//
■
'/m II
LL/fn
vG

5. (0. W i (*a. - c a-h'� �-:1 t� � 4 hr1�
L
/6d

.L.
,•,ti-L.-:l� rL- G V At -r) A \ rd4N l Ylik-
Il 6L.5 LC -I-, t14-1 (St u- 4c9 G;
/70
1 I
l l , A li-i -LPL . ,--1 '_C , 1. 'i ��4 U.L `,
v
172.
1`-'x`1.'" btu--C*C •�/W,- ,7 I, %�i1OO,-c'..le,:ii
i'l„G•C-P�i =2 1 i�c. 1 �- sd7w Kv( ,., J
, ctk.. ' G ' c'� c j. C : n f•�
5o
10 50
L J
C�'1,t,..,e, SOr`- i( , Li, ,,,C i—j
176
N.-r.1�
r\ nu .-et,i C'9ar`,e._-,,,--rzrAL-e4 .5d4ri41,r1+fr-C
C
/7d
, nt.-i ---+11.-e,- c i
r+ 1
L�o
/e<
► 5 fJ 'E-�
GUM
`` 0 11 I -
•iM�l:l..18z
r:\a.' 4.-4 s1'1..0' 5i C Cat 11.,;1-
/
/Olt
:�t "l% � S4) r(-1—
NV-:
'II
�
/�6
^f � it + 'iii
"r.Ac.t � - j;•itlllL'LT =�C�GrI Lc � hl�0,.,:��
��r� I
.-
-.-)
/138
I //
6:SGu-C 14 5 ' . LEA 'l O 'ala . Sal KI
/ . I

Attachment B
ERC
Environmental
and Energy
Services Co.

BORING NUMBER b l� W 3 I

FIELD LOG OF BORING (CONTINUED)
SHEEf�OF_6_
�c7'
O
0 DEPTH
(FEET)
N

RECOVERY
BLOW
COUNT

DESCRIPTION
8 ESTIMATED

PERCENT OF

COMMENTS
' m
GR
-
SA
R
6isa- r i,� st ( Li e`a}r -«, ik_r2.
-501 e;..o
I`-'
;
`
s) , cu.�.-i- M,oc,C e% 4 ei r -J -t
J 9 z
_
"�yS -
_
rqy
('1 •
/ fit
240
t
e
ze
-
10`i

Z06
-
210
7-1 2.

Attachment B
ERCE

WELL COMPLETION RECORD
JOB NO. SO 27 3 , 00 i WELL NO. Div) in/ l HYDROGEOLOGIST C2,' i.� anti 61.6 CLIENT O DRILLER Ld4►1e Yel4171 adwall 1Dn1I •sycieus
Surface Casing: Type AM
Diameter —
Length

MATERIALS
6eff►ee4.(sks.) 5 5k5
Filter Pack Material (ft3) q 5 /E S
Casing Material (ft.) ,Z I O
Bentonite (ft3) �i LOcl C k c)--1
Top of Bentonite Seaf
Top of Filter Pack i!3$ O ft.
i97O Top of Screen / e Z O ft.

Bottom of Screen .Z.O 7. 0 ft.
xo.j, y Bottom of Hole ,D'/: " ft.

NOTE: All DEPTHS ARE REFERENCED TO GROUND SURFACE

17-
ERCE
Attachment B

FIELD LOG OF BORING
BORING NUMBER - i laj l
SHEET , OF 6

PROJECT NAME
5EMC0

PROJECT NUMBER
-3Gzi3.Co1

ELEVATION AND DATUM

LOCATION
Z.R.' IV_1 uluiif-tcz( P/t,..j

DRILLING COMPANY
Letilite 6nuiv- ittiet.1- (

DRILLER
5t•ev

DATE AND TIME FAMED
3_ -r3 --H I

DATE AND TIME COMPLETED
_3 -9 -9 ( JOI(

DRILL EUIPMENT
.1>wl1 a tifto •

DRILLING METHOD
bti.x-1 Watt
/T130O

COMPLETION DEPTH,
_a9,y
TOTAL NO.OF MPLES
3 SIZE AND TYPE IT
i0 -IN. e v., 4- Ir1 &. f

HOLE DIAMETER
0-- l v
NO. OF

SAMPLES
BULK
—
SS
3 DRIVE

PITCHER

DRILLING FLUID
lht-t

DRILLING ANGLE
WATER
LEVEL
FIRST � • l int
/ �5

AFTER HOURS
/ 7 7671
�

SAMPLEHAMER /
TYPE i.t, ,�i C DRIVING WT. 1 q{O-f/ d DROP '3p--; it

HYDROGEOLOGIST/ DATE
C E t,>/ s i-b✓ 3-'i-' I

CHECKED BY / DATE

LITHOLOGY
DEPTH
(FEET)

SAMPLES

RECOVERY
BLOW
COUNT

DESCRIPTION
USCS
SYMBOL

ESTIMATED

PERCENT OF

COMMENTS
GR
SA
Fl
Li
h�
5 ,,�n 4, {
`i) IiNZCyIIN� - C C[Y7� r`cIIKCc
��
j5
fO
5�I 44 1 c rctn - -1 r .vv ►tot 7
,L
,
it -5 4--ee wi 4-k W,IT��-(w
0fR.,, ( L0Q-Z
Iy
/ 6
1 -{ dt �+ e�%�{ !' lay t z t4lyCL.
�l 4-0 4-i
ii
SP
e5
IS
:CZ
L`` 1 & ►rt) Lz oar" - -9.-4;64.e.4 G' 7�+),eiwte
S P
'/5
S
Z
1 t t k i- 6, -0,L, -,A., VwU't' 'f"4 ctt rN.!) 4.

I ''11 ` I
L -AC li-�'i( "i'-ecX CC �
z$
5 ct ex e a4.- d,V-
P
9y
5 I
ERC
Environmental
and Energy
Services Co.

BORING NUMBER ' > m w q

FIELD LOG OF BORING (CONTINUED)
Attachment B
SHEET '_OF!�
>
p
DE H
( PTPT
FEET)

SAMPLES

RECOVERY
BLOW
COUNT

DESCRIPTION
USCS
SYMBOL

ESTIMATED

PERCENT OF
-

COMMENTS
GR
SA
Fl
36_S

32. `� I� '
"lik 1 itvu- `t29 edc ir- ,-eiiv'le' x,
5 '15
3 }.s4bi
It'.., kE-hr-e : 1 u,�11-.J4ti--�ec Lcx, .
.) l
3w
3e
C `Gi 1 c'elt 'yVl(jt 7 1'1 �1� v►1�
N1
EGtO
1 3 4 .Z.
7//

t, N
.

HA; a =1. 5✓pp,vt
5,4
CHIe L
a 4

5. qj , 4Itn. e -g -iti i)- Ack:-) 1 ella.vit v`%
. ,1
(Ct,'
q£1
PActi5't '+e, 61`r.3 1k.. 6}`Ssv-^4c,,, te,,>.e .

C+(/
s^1
'AI
4C
a
ii 6
t;n-e.- rweeA tug 1.-alne-4,12 sa►uk,
gip.
5 /�
/
J
i
tlk_-- 5 v'o-L__, triC t 5 k dv-,1 i I ( -
6 le% Cj
� L
?/7y
, /
%�
1Z
`i ,
r 4- e ie x, s e
J►� i. ,0- -2
$o
�
S f N /l ) ( •L
/� 4 V�L /� W .0 LS I�4 ��L Si��4(l(�'\ , L+
1/ ` /4.4,-v,
��: .�• i
7 •J 1 /
.,etVle�1 5t 1 I'v-v or -e ._ & :Iv. cl,4.,-,
1 1/
s'" Si CAcz.�.i II
ci
G i-u.,.-e. kl e A 4-1 -t s 4,..;,,:t_.- ; 1-o (, i,11.w 30 yo
5i3
c
3 O
)L10.5
to
,
t✓FJG{,1N`yE'--LC ,'-CZ1bt -c-A). S �i' '` , j, `�
i')1 !P /a9�11,^1--�rit.rC6.'1-
4,--‘--,,,,-,/-� --
t'✓ L
J
A.40-t'i , J -cc ✓1l< il-c-c'� te•r.tfriki
i
vW
G
ivi (4= 4- 3 C' /42- 5
/
(J
71` l II v`-_- 40 ►k.ec (tu.+4.t-9:not..e.:t- eU )
j n\
C
Hk5
LS
— ai/fr,``
il
tiv-c-ct icy k,eit,: or-!-e,e
--3q
,;)rcl L4.iLO-4
)4, _.5e =

ERC
Environmental
and Energy
Services Co.

BORING NUMBER bpi(

FIELD LOG OF BORING (CONTINUED)
Attachment B
SHEET 3 OF_J2_
8 o
O
DEPTH
(FEET)

SAMPLES

RECOVERY
BLOW
COUNT

DESCRIPTION
USCS
SYMBOL

ESTIMATED

PERCENTOF

COMMENTS
GR
SA
Fl
'
s51AQe5.s
72 C.{1114, L' 6_4_ cuA- - ('. r -.. 1
7 `/
//
i 1 144 5 c„ n, 4Yt. c,,A fir%/.u.7-+` jrr1
10 ` _5
7 W
I
v\lc? 1 `71i vvex.- -e2CLi e(t- , KA., i.Cve -12..
f
60 Lt.,cL4-.

JCjrb�,.,G
oz
I I
aq..-'ik. 41A.,v1.cr 5: (1-I r,.rGt,,i,)e brit/
ei v
t� 6
E36
C 1 1
&
(.e,
'5(_-; s
`,6
-?;411 . ~
ii i (
rc'c - t — 7,;•r'trs'�1 •- Ir1rviei 5i�I r- •
I
y.z
qy
18 11
/v.0 )?- c� ,.•t'4.�
100
2T
5GLv1C CI r —CL -ck l c cj A....1- t v�
�iZ:
60 55
S
/D
ICy�, (2,
1/11 ` (^4 -4.0.l -C t .
to z 714-6-k_ l
/
0 : 5-14A -%o '2 -j ,i ew Fe',,,l
nit e6to:LAA-- . C.e'ci,,,— _,J reLln ee 7
j�
(�
tCx
1'(�
54=hcC� !'-ti �:°"'i' •, a 6A /14./i/.5 ` ,
1 40 t3
eockv-5- -C; f -a 01 -6,4( 5 alter e i igr-eltA
l)
=i
qS
CG
I 1J;

ERC
Environmental
and Energy
Services Co.

BORING NUMBER 'oil k41 L(i

FIELD LOG OF BORING (CONTINUED)
Attachment B

SHEET OF
g ESTIMATED
p
DEPTH
(FEET)

SAMPLES

RECOVERY
BLOW
COUNT

DESCRIPTION
USCS
SYMBOL

PERCENT OF

COMMENTS
GR
SA
Fl
Sa't,.L c .4- IG-s '
5W
5 ei5
0 ii'Z
t"l
1]
L IC3� 'J) `7<;, 9rC u -c- j aI ( 4-1-atz e,
ae,cC
is
ID .: ;i. 7 erN- h �c)F' c- '10—cc 5 T,
// W
p
°Ii, , GL4 �-zYw. 9-4 -t iet .6 tiz-r t1/4.
a
.J
ik0
/zz
�II�
(
-5t ��3 hr. -4p V1tiE.&Luz;IA - r-elIit�I,_Q
fll
80 z

12.q
Sn11� r• h he -...c .,1; i el1-t r --Fe
1 ,:.°15 -, /cv u .

I \,
�t c`u �1tn Y - trtttt.rcklr�pv! -
7`�
s
%�
�'z=(
� / /
1 '�Ll t \ Cct' �6D'I.-Ei 11,i // i- c3 V'-Gtc a
r
1 'l ( _
/14-(71‘51 -iv lint l
s 3 2.
( I , /
\ Ct- e�� Y, G' ` YYJ CFiL r -C--' 6^e$ I v t'' l
5c-
AICI
:1 c'
�C`
3 L
•�1
4-
n A !k —L1 z v,.. - k ;-mac v\ , r,�t 7 '1
/ /
)
4n,6- e -c:Cct.•l-e(c, •- 5c - rte( ,
LL
_
5c
25 25
/3G
J
I 1 L 1
cL ` 1, 2' ,Pyh_<-t 1 , vn.9 `. , 1 14 SG•L\.,i `5 e r -G V A \ 5wl
ICI
7c,
2-c
I 1 /
•j'I l
is,.c� \' Yy ',,r-cu--t-cu--t`7 L:?
►1t
5o
lz
C
% 3 f}
i
SCl t. c
3hi
l0
/e
i4O
/1z
iii
e\ 0,-� t:,,
/�i13
j{1 ` C � J C •f4a
�vr-',0 �x'i.' J►rt�.�i ruvL}
_
GAL dtiwn ,
I
l

ERC
Environmental
and Energy
Services Co.

FIELD LOG OF BORING (CONTINUED)
BORING NUMBER I) - e
Attachment B
SHEET
o
8 0
DEPTH
(FEET)

SAMPLES

RECOVERY
BLOW
COUNT

DESCRIPTION
USCS
SYMBOL

ESTIMATED

PERCENTOF
•

COMMENTS
GR
SA
Fl,
%5-2
/54
/59
Y
J_.C.i ,_ Ga ( G.'L1 L, 55
/60

I I
C1- e1 �--, ct,,16il C%� :-C2 l ---A 1 kieLk v -✓t., x.64(_. 5o

12.5 .LS
K-erSc(t�t c >�c 1Ii:i f
!
j
iy> c c 5 vc�- l i S�Jr- it , / '''�: S "
V2
r/ J
/(..i
'
i 6
L.t,-�t-ft
wk-c L 7• A. %I.t (-) G'GH' `t i -•
501`- c 1 ret 4--4,)-14._V-aliLt 1IA�) •-t'� 1
i72
J
Vz. 4-) -1 /
/lc?Crr f i—StS,-1 e 2 cU/ elad Gi. L.
%'1 -i S . D
04,
r �/()
tie
it eGi liU -
gt>
C
415
5 S Cf i' ) ,-eft 1) t, ',l (J't r/ { i
f
1 —,—
/ /
C /
/ /'
% /
az.

I I I_
51 lY-.� `�II,l'vi6�Cl� C.'k,t1�: GKGLi I ,1V-Cf'C1',N, eli
` 7O
/t,,//
✓1n,t,t.S i- f� .14th, t. 7�/l -,1-(. L
)1.tl�c.k J;I- - . `4 -c-6.. `T
34- - L-{ yyl Cc'✓h /71 r i ( Il
I /
C7tL•1— c' T C,-i Cleo f l Y
!C.,---,/
-
74b,�6�; "3c` 14 ,-,1a..,s ec bir--et.�.,
C -L
-*)t�
- ,r- I k ,4 �.vx.
57 �'t-r,-t -i '1-) 6 Gk ..e%t 4-1 + e Li 1-C: C ,
SP
( o
it..)
ta.t',4 v,. '
/6f3
f').(31-'7
-41.--t

APA ERC
Environmental
and Energy
Services Co.

BORING NUMBER U sv w

FIELD LOG OF BORING (CONTINUED)
Attachment B

SHEET , E OF
8 zo
C
DEPTH
(FEET)

SAMPLES

RECOVERY
BLOW
COUNT

DESCRIPTION
USCS
SYMBOL

ESTIMATED

PERCENT OF

COMMENTS
GR
SA
Fl
+ti�
("l E�Li.U.iwtn+t6. 4-.. LC•czle-‘,..k_.-y y ctik.Cc( 5eccrtc,C `P
it)
5 z i�
510
0 5

C j 4-a, i-t. c',t - Ltii,ek 1. 5.` L4, z,e,,,, t,
ey
S cZ 14. ! d Ct(.. ) (" S 6-'0:44,
0 (tU
4G
InrjCl
f ' J
CL
`7 . 1 6.34 is C r 4I b 4z�L.:.,A , )V4 ✓k -,J" u;
i
:Z v

�CL,l V 6YL t.._.c-( ) 1 '' 'ICJ 6,' ' 1(iCe. Lz1,,,FE(6a, 10 7v
SGt. 1.5 c c)a ii -e 7....-( 1 'L t-ct
s/LI-u._ a- (-i-c C 6g-z-,--J-e.
,-
\),(11
&O
''(
-
za9
Zoo

7.,6)f--i elf 2_0rit L/
ogCC;
.2J
2 Attachment B

APPENDIX B

HISTORICAL SUBSURFACE PROFILES (BY OTHERS)
LANGAN

Attachment B
A
MW13
BLDG
W11
MW6
Approximate
location of
sewerline
W7_
MW14

BRICK WALL
4 SUMPPIT

CONCRETE
PAD
MW10
SMW1
SMW3
B
MW16
W9
TANK
PAD
SMW2

DRIVE WAY AC GATE
MW12

BEMCO BLDG
All elevations compared to mean sea level (MSL)
MW8
A'
MW15
0 40
FEET
ERC
—: Environmental
and Energy
Services Co.

Location of Cross -sections
FIGURE
3-6

Ahac _
orient
A
240--
230 -
220
MW13
MW11 MW6
SP
SP
SP
/ SP/SC SP SC
ism,
I _ I cL
SP _
/ u CSC/SM
/
I
210 - i---i f
'SP' /
LJJsP/SM
IsPI /
200 -----ice r►�`
u
190
ERC
.07. Environmental
and Energy
Services Co.

MW10 MW1 MW12
SC --
W
SP/SC
SP
SC/SPA-�
1 _
S
MWB MW15
A'
-240
SP
SP
SP
I
n ----.

SP ��` j - . SPISC
E - -I q\ I
I
ISC1
I I
u
1 Cross -Section A -A'
SP
MLJSM
-230
220
-210
- 200
-190
LEGEND

ASPHALT COVER
GRASS SURFACE.

SAND SURFACE.

CONCRETE COVER

CINDER BLOCK WALL
3-11
FIGURE
3!7

Attachment B
B B'
240
MW16 MW9
MW1 MW10 MW3
230
220 -
SM
SP/SM
1 I
I��_SP/SC
F -I
I I
�XSP/SC
I I
LJ
ISPI

I SP/SM
I ---f
S
LP
I 1
I. ISM
I I
1-11
ISMI
! I
LJ
SP
SP
SC
ME.

SP/SC
SC
MW7 MW14
u
SP
I I
Isp
I I
I„SM/SP
-MULL
I I
ISP
I-).-SP/SM
SM
210 - I --I SM/SP I
I ---1 / \ El
F ---IS isPI
/ I \ I I
200 - P I F--XSC/SP -200
t
I I i��� i-♦ I I
i0
ICI `--. �� f� la-
190 -- -- 190
SP/SC
SM/SC
x-240
-230
-220
-210
ML
LEGEND

UNIFIED SOIL CLASS-

IFICATION SYSTEM

ASPHALT COVER

GRASS SURFACE

SAND SURFACE

CONCRETE COVER

CINDER BLOCK WALL
ERC
'Environmental
and Energy
Services Co.

Cross -Section B -B'
FIGURE
3-S
3-12

Attachment B

BRICK WALL

CONCRETE
PAD
BLDG

SUMP/PIT
A
•--
B7
B
B9
B8
•--
B 6
SMW-1
SMW-3
•
B10i
•
B5
•
B4
TANK
PAD

DRIVE WAY A/C
A'
B2 B1

SOLVENT
TANKSI
B'
B3
SMW-2
•
GATE

SEMCO BLDG
LEGEND
SMW-2 = Monitor Well Location and Number
• B9
= Soil Boring Location and Number
A A' = Line of Cross Section
(PA
0 20
FEET
Locations of SoII Borings, Monitor Wells, and Cross -Sections FIGURE
4-1
oar
WESTEC Services. Inc.
4-2

Attachment B
A
B7
B6
B5 B2
5, _
SP
SM
Silty Med. •••
Grained Sand •
10 - • • - Sitty Mad.

SC Grained Sand..... ••
15 1
LEGEND
SM = Silty Sand
SP = Well Sorted Sand
SW = Poorly Sorted Sand
= Lithologic Contact
=' Approximate Water
Table Location,
5 10
15 sP
sP
SP
sP
V
Lt. Brown Clean,
Well Sorted
Medium -Grained Sand
5 sP
SP
—10--
,]SM
15 Clayey
SC Med.-Gr. Sand
1 SM
•
♦
♦ ♦
•
♦
•
10 •
SP
V
SP
15 SM ♦�
Tan, Silty, Medium -Grained Sand
Cross -Section Locatioq
SJMPmrr

CONCRETE
PAD
A
i
B8
B8
SrnW-
B6
SMW-3
Bs
84 DRIVE WAY MC
GATE

DEMO &IDO
4 5
A'
Bi
SP

HORIZONTAL SCALE
0 10
FEET
Cross -Section A -A'
FIGURE
4-2
Of
WESTEC Services, Inc.
4-3

Attachment B
B
B9
B8
B4
B'
B3
5 Tan, Well Sorted
`` Medium -Grained Sand

�•
• -a%`
!10
SP/SW
Tan, Poorly
SP
SP
-
SM
10 sPisw'
Sorted Sand 4 5•
/ SM
/ �
/
/ 10
5 SP
/' 5
/
.4- .
.•��
i
SM
15 SW
SM
SM
••'10
SP
/s
/

Tan, Silty, Medium -Grained Sand
.' _Weil Sorted Sand
15 -
SM
SP/SW
15 SM
15 SM
LEGEND
SM = Silty Sand
SP = Well Sorted Sand
SW = Poorly Sorted Sand
SP/SW = Moderately Well Sorted Sand
-- -- = Lithologic Contact
= Approximate Water Table Location
i
Cross -Section Location;
Sl1MPIPR

CONCRETE
PAD
A
• _
B7
B
B9
5 c.MW-1
B6
SMW-3
80 84
TAM<
PAD
B5
B

DRIVE WAY NC
B'
83 A' SMw-t
81 CATE'\,

SEMCO BLDG
/,,
HORIZONTAL SCALE;
0 10
FEET
Cross -Section B -B'
FIGURE
4-3
"%V
WESTEC Services, Inc.
4-4

Attachment B

GOLF COURSE
M M x x x x x x x x
ONB9
rrrrrr

N/ORTH BUIILDING
rlrrlr r

PARKING LOT
O NB17
NB22&
(MW11)
NB 14
(Mw7)
NB12 l
(MW6)
S
BUILDING NB27
(MW12)
DB4
SMW3
��SMWi
MW10 •
D'B3
NB4 NB3 . NB1
+O lB2
� � w'. I NB 15
E=MCO�/�r/ (MW8) O. NB19

LANDSCAPED
AREA

OLD FOUNDATION
NB7
(MW5)
B
0 100
FEET

INDUSTRIAL PARKWAY
-x x
WELL 2AS
VA
x
x
LEGEND

MONITOR WELL LOCATION
® BORING LOCATION
- CROSS-SECTION TRANSECT
� ERC
i . Environmental
and Energy
Services Co.

Cross -Section Location Map
FIGURE
4-2

Attachment B
A
WEST
0-
20 -
H
w
w
LL
z
w
U
< 40 -
to
cc
z
O
a
O
60 -
O
w
co
2 w
0 80 -
100
A'
EAST
NB6 NB13 DB1 NB11 NB10 NB16
SP
SP/SM
SM
SC/SM
SP
SP
SP/SM
SP/SC
SP/SM
SP
SP/SM
SP
SP
SP/SC
SP
SP
SP
SP
ML
SP
SM/ML
GC
GC
SP
SP/SC
SP/SM
SM
SP
SP/SM
SP
CUML
SM
SP
SP
SC
SM/ML
SM/SP
SP
SP
SP/SM
SM
AAI
ML
CL
ML
SP
SP
SM
SM
SM
SP/SM
SP
SP
SC
SC

GROUND SURFACE

TAN TO LIGHT BROWN,

SILTY AND CLEAN

FINE -TO -MEDIUM -GRAINED SANDS
ML
ML

BROWN TO TAN SILT, CLAYEY SILT,

SILTY CLAY, CLAYEY GRAVEL,

AND SANDY SILT
SW/GW
SW/SP
SP
SP
SW/SP
SW/SP

WELL -TO POORLY -SORTED

FINE -TO COARSE -GRAINED SANDS

WITH MINOR GRAVEL
LEGEND
ML= UNIFIED SOIL

CLASSIFICATION
SYSTEM

CLASSIFICATION
HORIZONTAL SCALE: 1" = 100'
!' ERC
Environmental
and Energy
Services Co.

Cross -Section A - A'
FIGURE
4-3

Attachment B
B
WEST
0-
20 -
E.
w
w
U-
Z
W
U
< 40 -
C
C
Z
O
cc
60 -
O
LU
CO
2 I-
0 LU
0 80 -
100 -
B'
EAST
NB20 DB2 NB7 NB8
SP
SP
SC ML
MLSP
SP
SM
SM/SC
SM
SP
SP/SC
ML
SM
SM
SC/CL
SP
SP
SM/SP
SP
SP
SP

GROUND SURFACE

TAN TO LIGHT BROWN,

SILTY AND CLEAN

FINE -TO -MEDIUM -GRAINED SANDS
ML SM
SM CL
ML
CL CL
ML.

SW/SP
SW

BROWN TO TAN SILT, CLAYEY SILT,

SILTY CLAY, CLAYEY GRAVEL,

AND SANDY SILT
GP
SP
SP
SW
SP
SW
SP

WELL -TO POORLY -SORTED

FINE -TO COARSE -GRAINED SANDS

WITH MINOR GRAVEL
LEGEND
ML = UNIFIED SOIL

CLASSIFICATION
SYSTEM

CLASSIFICATION
2- = WATER -TABLE
HORIZONTAL SCALE: 1" = 100'
ERC
Environmental
and Energy
Services Co.

Cross -Section B - B'
FIGURE
4-4

Attachment B
C
NORTH
0-
20 -
I-
w
w
z
w
0 LL 40 -
D
CC)
z
O
60 -
O
J
w
Z
F-
a_
w
80 -
100 -
DB3 DB4
DB1 SMW j/ SMW2 \NB15
SP
SP
SP/SC
SP
SP
SP
SP
SP
SP
SM
SP
SP
SP
SM
SW
SW
SP
SP
SP/SC
SP
C'
SOUTH
DB2
SP
SM
SM/SC
SM
SP
ML
SP
SM/ML
GC
GC
SW/GW
SW/SP
SP
SP
SW/SP
SW/SP
ML
ML
SM
SM
SP
SW
SP
SP
SP
GW
GM/GC
ML
SM
CI
SM
GC
SM
SP/SC
ML
; ML
SM
CL
ML
SW
GP
SP
SP
SW
SP

GROUND SURFACE

TAN TO LIGHT BROWN,

SILTY AND CLEAN

FINE -TO -MEDIUM -GRAINED SANDS
SM
CL
ML
CL

BROWN TO TAN SILT, CLAYEY SILT,

SILTY CLAY, CLAYEY GRAVEL,

AND SANDY SILT
SW/SP
SW
SP
V

WELL -TO POORLY -SORTED

FINE -TO COARSE -GRAINED SANDS

WITH MINOR GRAVEL
LEGEND
ML= UNIFIED SOIL

CLASSIFICATION
SYSTEM

CLASSIFICATION
= WATER -TABLE
HORIZONTAL SCALE: 1" = 100'
ERC
Environmental
and Energy
Services Co.

Cross -Section C - C'
FIGURE
4-5

Attachment B
A
-- 5000
L__
i
B226
Dept1 TCF c' 2-DCF
10' nd nd
15' nd nd
20' nd nd
25' 0.0028 nd
30' 0.011 0.0018
35' 0.024 0.0034
40' 0.064 0.0077
45' 0.13 0.018
50' 0.10 0.022
B223
Depth TCF c12-nCF
5' 0.56 0.018
10' 0.39 0.061
15' 2.1 0.35
20' 2.6 0.37
25' 6.5 1.0
30' 2.6 0.24
35' 3.3 0.57
40' 3.8 1.4
45' 1.8 0.42
50' 1.9 0.61
Santa Mar' -- B221 iI
T
_feptl TCF c1 2-DCF_ — —
5' 10 1.5
10' 4.8 6.0
15' 75 12
20' 97 2.4
25' 8.5 1.8
30' 3.1 0.12
35' 15 2.5
40' 20 0.75
45' 5.1 0.31
50' 9.5 0.33
i _ A'T
Dept
B227
1 TCF c' 2-DCF
5' nd nd
10' nd nd
15' nd nd
20' nd nd
25' 0.0033 nd
30' 0.012 nd
35' 0 0031 nd
40' 0.016 0.0019
45' 0.13 0.0060
50' 0.096 0.0052
B226
B223
B227
- -/
B228
B221
B222
i
Pept 1
Soil borings - continuous core
Sample results shown in mg/kg
Results > ESL in Red
A'
rs
Cross-section line
Contour lines are TCE in soil vapor in pg/m3
5'
10'
15'
20'
22'
25'
30'
35'
40'
45'
50'
TCF c12-nCF- B225
B225
nd

0.0026

0.0031

0.026

0.018

0.0029

0.0019

0.078

0.082

0.018

0.041
nd
nd
nd

0.0063

0.0058
nd
nd

0.019

0.023

0.0095

0.022
i
i
7 B228
Depti TCF c12-DCF
5' nd nd
10' nd nd
15' nd nd
20' nd nd
25' nd nd
30' 0.0076 nd
35' 0.022 0.0021
40' 0.043 0.0033
45' 0.40 0.0036
50' 0.055 0.0024
B224
J \
ustrial Parkway
A
B222
Dept1 TCE r.12-DCF
5' nd nd
10' nd nd
15' nd nd
20' nd nd
25' nd nd
30' 0.0092 nd
35' 0.020 0.0041
38' 0.44 0.022
40' 0.11 0.014
45' 16 0.50
50' 3.6 _ 0.22
I
ACg
B224
Depti TCF c12-DCF
5' nd nd
10' nd nd
15' nd nd
20' nd nd
25' 0.056 0.0038
30' 0.018 0.0025
35' 0.074 0.0091
40' 0.10 0.012
45' 0.26 0.034

46.5' nd nd
50' 0.57 0.023
Scale
50 0 50 100 150feet
1 inch = 100 feet
Figure 2
Analytical
Consulting
group, inc.

DRAWN BY
Michael Tiffany
DATE:

May 2022
Soil Boring Location Map
Former SEMCO Twist Drill & Tool Company
2936 Industrial Parkway, Santa Maria, California

Attachment B
Parking
Depth (in Feet bgs)
100 150 200 250
Distance (in feet)
Vertical Exaggeration 1:3
300
350
400
0 A
Soil Boring
B221
SM-30
Soil type sm— 2.1 TCE concentration
sm— 0.09 mg/kg
CL— nd
ML— nd
2936
Industrial Parkway
Legend
Silty sand (SM)
Silt (ML) includes clayey and sandy silts
= Clay (CL) includes silty and sandy clays
and clayey sand (SC)
Estimated extent of TCE Impacts > 1 mg/kg
Yard Area
Analytical
Consulting
group, inc.

Driveway
DRAWN BY:

Michael Tiffany
DATE:

May 2022
2986
Industrial Parkway
450
500
A'
Figure 3
Cross Section A -A'
Former SEMCO Twist Drill & Tool Company
2936 Industrial Parkway, Santa Maria, California

Attachment B
(3ealo�io a�
Formation and symbol an plats 2
Thick ai (Beet)
Jurassic (1) , Tertiary -,+ Quaternary
•
1 Dune sand (Qs)
0-100-
Unconformity
River -channel deposits (Qrc)
0-25 ±
Recent
Unconformity -
Alluvium (Qal)
0-230
_
_Unconformity
Terrace deposits (Qt)
0-75
Pleistocene
Unconformity
Orcutt formation (Qc)
0-225
P
Unconformity
Paso Robles formation (Tpr)
0-2,000 ±
Pliocene (upper)
Local
- - - - unconformity
Careage sand (Tc)
100-650 ±
Local
-
unconformity - - - -
Pliocene (upper)
to Miocene (lower)
Unconsolidated Tertiary rocks,
undifferentiated (Tu). (Includes
Foxen mudetone, Sisquoc forma-
tion and Monterey shale.)
0-10, 000�-
--
Major
- - - unconformity - - - -
Franciscan and Knoxville (t)
formation (Jfk)
(After Worts, 1951)
ERC
Environmental
and Energy
Services Co.

Stratigraphic Units of the Santa Maria Valley
FIGURE
2-2
2-4

Attachment B

APPENDIX C

HISTORICAL GROUNDWATER, SOIL, SOIL VAPOR, AND

INDOOR AIR DATA
LANGAN

Table C1
Historical Groundwater Data (Shallow/Perched Zone)
SEMCO, Santa Maria, California
LANe nMesct: 781016901
September 2025
Analyte
Volatile Organic Compounds
Semi Volatile
Organic Compounds
Petroleum Hydrocarbons
(1)
c
co
a)
o
o
U
H
a)
c
ca
465
0 o
U
IT
1,2-Dichloroethane
Cis-1,2-Dichloroethene
Dibromochloromethane
Tetrachloroethene (PCE)
Toluene
Trans-1,2-Dichloroethene
Trichloroethene (TCE)
Vinyl Chloride
1,4-Dioxane (P-Dioxane)
Petroleum Hydrocarbons
(C04 -C12) GRO
Petroleum Hydrocarbons
(C13 -C22) DRO
Petroleum Hydrocarbons
(C23 -C40) ORO
Petroleum Hydrocarbons
(C14 -C34)
CAS Number
71-55-6
79-00-5
107-06-2
156-59-2
124-48-1
127-18-4
108-88-3
156-60-5
79-01-6
75-01-4
123-91-1
PHCC4C12
PHCC13C22
PHCC23C40
PHCC14C34
Groundwater Direct Exposure ESL - MCL Priority
200
5 0.5
6 80
5 40
10 5

0.5 0.38
NS
NS
NS
NS
Groundwater VI Commercial ESL
6,300
23 9.8
210
NS

2.8 4,900
920

7.5 0.14
8,000
NS
NS
NS
NS
Location
Sample Name
Original Sample
Name
Sample Date
pg/I
pg/I
pg/I
µg/I
µg/I
µg/I
pg/I
µg/I
pg/I
pg/I
pg/I
pg/I
pg/I
pg/I
pg/I
Extraction
Wells
EW-1
EW-1_080494
EW1
08/04/1994
ND U
ND U
ND U
NA
ND U
ND U
NA
ND U
6,600
U
NA
NA
NA
NA
NA
EW-2
EW-2_080494
EW2
08/04/1994
ND U
ND U
ND U
NA
ND U
ND U
NA
ND U
43,000
ND U
NA
NA
NA
NA
NA
EW-3
EW-3_080494
EW3
08/04/1994
ND U
ND U
ND U
NA
ND U
ND U
NA
ND U
180,000
ND U
NA
NA
NA
NA
NA
EW-4
EW-4_080494
EW4
08/04/1994
ND U
ND U
ND U
NA
ND U
ND U
NA
ND U
38,000
ND U
NA
NA
NA
NA
NA
EW-5
EW-5_080494
EW5
08/04/1994
ND U
ND U
ND U
NA
ND U
ND U
NA
ND U
2,100
ND U
NA
NA
NA
NA
NA
Monitoring Wells
MW -1
SMW-1_111088
SMW1
11/10/1988
ND U
ND U
ND U
NA
ND U
ND U
NA
2,800
260,000
ND U
NA
NA
NA
NA
NA
SMW-1_110589
SMW1
11/05/1989
ND U
ND U
ND U
NA
ND U
ND U
ND U
NA
320,000
ND U
NA
NA
NA
NA
NA
SMW-1_020390
SMW1-2-90
02/03/1990
ND U
ND U
ND U
NA
ND U
ND U
ND U
NA
430,000
ND U
NA
NA
NA
NA
NA
MW -1_060690
MW1
06/06/1990
ND U
ND U
ND U
ND U
ND U
ND U
ND U
ND U
250,000
ND U
NA
NA
NA
NA
NA
MW -1_121498
MW -1
12/14/1998
ND U
ND U
NA

0.6 NA
ND U
ND U
ND U
24 ND U
NA
NA
NA
NA
NA
MW -1_092203
GWMW1-092203
09/22/2003
ND U
ND U
NA
490
ND U
ND U
ND U

0.7 300
ND U
69 NA
NA
NA
290
MW -1_062921
MW1
06/29/2021
ND U
ND U
ND U
47 ND U
ND U
ND U
ND U
260
ND U
2 ND U
490
660
NA
MW -2
SMW-2_111088
SMW2
11/11/1988
ND U
ND U
ND U
NA
ND U
ND U
NA
7,700
200
ND U
NA
NA
NA
NA
NA
SMW-2_110589
SMW2
11/05/1989
100
ND U
ND U
NA
ND U
ND U
ND U
NA
220
ND U
NA
NA
NA
NA
NA
SMW-2_020590
SMW2-2-90
02/03/1990
ND U
ND U
ND U
NA
ND U
ND U
ND U
NA
ND U
ND U
NA
NA
NA
NA
NA
MW -3
SMW-3_111088
SMW3
11/10/1988
ND U
ND U
ND U
NA
ND U
ND U
NA
220
5,500
ND U
NA
NA
NA
NA
NA
SMW-3_110589
SMW3
11/05/1989
200
ND U
ND U
NA
ND U
ND U
ND U
NA
42,000
ND U
NA
NA
NA
NA
NA
SMW-3_020190
SMW3-2-90
02/01/1990
ND U
ND U
ND U
NA
ND U
ND U
ND U
NA
57,000
ND U
NA
NA
NA
NA
NA
MW -3_060790
MW3
06/07/1990
ND U
ND U
ND U
13,000
ND U
ND U
ND U
ND U
110,000
ND U
NA
NA
NA
NA
NA
SMW-3_121498
SMW-3
12/14/1998
ND U
ND U
NA
3,000
NA
1,500
ND U
ND U
35,000
ND U
NA
NA
NA
NA
NA
MW -5
MW -5_121598
MW -5
12/15/1998
ND U
ND U
NA
ND U
NA
ND U
ND U
ND U
30 ND U
NA
NA
NA
NA
NA
MW -5_092203
GWMW5-092203
09/22/2003
ND U
ND U
ND U
ND U
ND U
ND U
ND U
ND U
ND U
ND U
ND U
NA
NA
NA
ND U
MW -6
MW -6_110589
MW6
11/05/1989
ND U
ND U
ND U
NA
ND U
ND U
ND U
NA
18,000
ND U
NA
NA
NA
NA
NA
MW -6_020190
MW6-2-90
02/01/1990
ND U
ND U
ND U
NA
ND U
ND U
ND U
NA
18,000
ND U
NA
NA
NA
NA
NA
MW -6_060690
MW6
06/06/1990
ND U
ND U
ND U
3,000
ND U
ND U
ND U
ND U
15,000
ND U
NA
NA
NA
NA
NA
MW -6_080494
MW6
08/04/1994
ND U
ND U
ND U
NA
ND U
ND U
NA
ND U
1,000
ND U
NA
NA
NA
NA
NA
MW -6_121598
MW -6
12/15/1998
ND U
ND U
NA
19 NA
ND U
ND U
ND U
86 ND U
NA
NA
NA
NA
NA
MW -6_092203
GWMW6-092203
09/22/2003
ND U
ND U
ND U
20 ND U
ND U
ND U
ND U
23 ND U
ND U
NA
NA
NA
120
MW -8
MW -8_022090
MW8-2-90
02/20/1990
ND U
ND U
ND U
NA
ND U
ND U
ND U
NA
320
ND U
NA
NA
NA
NA
NA
MW -8_060890
MW8
06/08/1990
ND U
ND U
ND U
1,300
ND U
ND U
ND U
ND U
88 ND U
NA
NA
NA
NA
NA
MW -8_080494
MW8
08/04/1994
ND U
ND U
ND U
NA
ND U
ND U
NA
ND U
ND U
ND U
NA
NA
NA
NA
NA
MW -8_121598
MW -8
12/15/1998
ND U
ND U
NA

2.4 NA
ND U
ND U
ND U

7.8 ND U
NA
NA
NA
NA
NA
MW -8_092203
GWMW8-092203
09/22/2003
ND U
ND U
ND U

1.9 ND U
ND U
ND U
ND U
57 ND U
ND U
NA
NA
NA
120
MW -8_062821
MW8-grab
06/28/2021
ND U
ND U
ND U
ND U
ND U
ND U
ND U
ND U
ND U
ND U
NA
ND U
NA
NA
NA

LANIAN

Table Cl
Historical Groundwater Data (Shallow/Perched Zone)
SEMCO, Santa Maria, California
LANe nMesct: 781016901
September 2025
Analyte
Volatile Organic Compounds
Semi Volatile
Organic Compounds
Petroleum Hydrocarbons
(1)
c
co
a)
o
o
U
H
a)
c
ca
465
0 o
U
IT
1,2-Dichloroethane
Cis-1,2-Dichloroethene
Dibromochloromethane
Tetrachloroethene (PCE)
Toluene
Trans-1,2-Dichloroethene
Trichloroethene (TCE)
Vinyl Chloride
1,4-Dioxane (P-Dioxane)
Petroleum Hydrocarbons
(C04 -C12) GRO
Petroleum Hydrocarbons
(C13 -C22) DRO
Petroleum Hydrocarbons
(C23 -C40) ORO
Petroleum Hydrocarbons
(C14 -C34)
CAS Number
71-55-6
79-00-5
107-06-2
156-59-2
124-48-1
127-18-4
108-88-3
156-60-5
79-01-6
75-01-4
123-91-1
PHCC4C12
PHCC13C22
PHCC23C40
PHCC14C34
Groundwater Direct Exposure ESL - MCL Priority
200
5 0.5
6 80
5 40
10 5

0.5 0.38
NS
NS
NS
NS
Groundwater VI Commercial ESL
6,300
23 9.8
210
NS

2.8 4,900
920

7.5 0.14
8,000
NS
NS
NS
NS
Location
Sample Name
Original Sample
Name
Sample Date
pg/I
pg/I
pg/I
µg/I
pg/I
pg/I
pg/I
pg/I
pg/I
pg/I
pg/I
pg/I
pg/I
pg/I
pg/I
Monitoring Wells
MW -10
MW -10_022090
MW10-2-90
02/20/1990
ND U
ND U
ND U
NA
ND U
ND U
ND U
N,
130,000
ND U
NA
NA
NA
NA
NA
MW -10_060890
MW10
06/08/1990
ND U
ND U
ND U
43,000
ND U
ND U
ND U
ND U
270,000
ND U
NA
NA
NA
NA
NA
MW -10_080494
MW10
08/04/1994
ND U
ND U
ND U
NA
ND U
ND U
NA
ND U
270,000
ND U
NA
NA
NA
NA
NA
MW -10_121498
MW -10
12/14/1998
ND U
64 NA
15,000
NA
ND U
ND U
ND U
530,000
ND U
NA
NA
NA
NA
NA
MW -10_062921
MW10
06/29/2021
ND U
ND U
ND U
2,000
ND U
ND U
ND U
ND U
83,000
ND U
NA
56,000
NA
NA
NA
MW 11
MW -11_020390
MW11-2-90
02/03/1990
ND U
ND U
ND U
NA
ND U
ND U
ND U
NA
290
ND U
NA
NA
NA
NA
NA
MW -11_060790
MW11
06/07/1990
ND U
ND U
ND U

8.9 ND U
ND U
ND U
ND U
54 ND U
NA
NA
NA
NA
NA
MW -11_080494
MW11
08/04/1994
ND U
ND U
ND U
NA
ND U
ND U
NA
ND U
20 ND U
NA
NA
NA
NA
NA
MW -11_121598
MW -11
12/15/1998
ND U
ND U
NA

1.3 NA
ND U
ND U
ND U
38 ND U
NA
NA
NA
NA
NA
MW -12
MW -12_060890
MW12
06/08/1990
170
ND U
ND U
8,500
ND U
ND U
ND U
ND U
3,600
ND U
NA
NA
NA
NA
NA
MW -12_080494
MW12
08/04/1994
ND U
ND U
ND U
NA
ND U
ND U
NA
ND U
4,600
ND U
NA
NA
NA
NA
NA
MW -12_121498
MW -12
12/14/1998
ND U
ND U
NA
4,200
NA
ND U
ND U
ND U
3,200
ND U
NA
NA
NA
NA
NA
MW -18D
MW -18D_060890
MW -18D
06/08/1990
ND U
ND U
ND U
1,300
ND U
ND U
ND U
ND U
80 ND U
NA
NA
NA
NA
NA
Notes: