2025-01644 Award Construction Contract and Supplemental Agreement for the North Sacramento-Hagginwood Library Renovation (NSHLR) Project: (C15000850) [Published for 10-Day Review 09/23/2025] Part 2 — Sacramento City Council, October 7, 2025 (part 2 of 4)

ADDENDUM #1
North-Sacramento Hagginwood Library

08.07.2025
Questions Received via Email:

1. Q: In the Specs, it referenced a Sample PCO Form. What are the maximum markup percentages allowable for the Subs and Contractors?
A. Any self-performed Change Order work is allowed a 15% max. markup. Any direct prime markup over a subcontractor is 5% maximum. The total markup shall not exceed 25% (i.e. 15% for sub + 5% for prime sub + 5% for GC = 25%). Any added scope is subject to review by Construction Manager and City PM prior to execution and payment and will be reviewed on a case-by-case basis. Review the Division 1 Specifications for more information on this topic.

2. Q: What will be the selection process for this bid?
A. Each of the five pre-qualified Contractors are invited to provide bids electronically.

The base-bid cost will be the determining factor in the selection process. Please review the bid-form carefully and the determination of the low bidder is outlined.

3. Q: Are contractors allowed to use the existing restrooms on-site? A. Include in bid to supply port-o-lets as needed throughout construction for all workers on-site.

4. Q: Do we need to provide temporary fencing?
A. Yes. Any temporary fencing required will need to be provided by the selected GC. City will be providing temporary fencing to secure the site after Library vacates and prior to construction beginning. Coordination will be needed to remove the City fence and install a temporary fence by the selected GC. All site security will be the responsibility of the selected GC from NTP through Final Completion and key handover. Refer to the Division 1 Specs, a security camera system will be required throughout construction.

5. Q: Finish schedule A10.10 shows 02 Hallway to receive LVT. Finish plan on same page shows hatching for EXT in that hallway. Please clarify.

A. The Finish Plan is correct. LVT-1 in the Hallway between the Community Room and Public Restrooms. All other Hallways on the plan are EXT- existing concrete, treated.

PBK is reviewing and may issue a clarifying exhibit with a future addendum.

6. Q: Finish schedule A10.10 shows 12 Adult Area to receive LVT. Finish plan on same page shows hatching for CPT-1 in that area. Please clarify.

A. The Finish Plan is correct. CPT-1- Carpet Tile in the Adult Area is correct.

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7. Q: Finish schedule A10.10 shows 18 Staff Circulation Counter to receive CPT. Finish plan on same page shows hatching for LVT. Please clarify.

A. The Finish Plan is correct. Staff Circulation is to have LVT-1.

8. Q: Specification 27 51 23.80 Local Sound Reinforcing Systems, Section 1.4 states, “Contractor shall employ the services of a professional structural engineer licensed to practice in the State of Texas to verify the loas ratings of hanging components. Provide attachment details on Shop/Submittal drawings reviewed by said engineer.” Assuming these are intended to say State of California, does this apply to the projector, wall vault or speakers or any other AV component of this project?
A. Bid to provide Shop Drawings that are stamped by a Structural Engineer licensed in the State of California. This applies to mounting connection details for Projectors, speakers, and any other AV component associated with the project that are structurally mounted. PBK is reviewing this question and may issue some further clarification in a future addendum.

9. Q: Specification 27 51 23.80 Local Sound Reinforcing Systems, Section 1.4 states, “Contractor shall employ the services of a professional structural engineer licensed to practice in the State of Texas to verify the loas ratings of hanging components. Provide attachment details on Shop/Submittal.

A. Same as answer above. Provide Shop Drawings signed by a Licensed Structural Engineer.

10. Q: Drawing T0.01 technology legend (WF) Wi-Fi cabling states (1) category 6A cable to each device, however drawing T2.02 keynote 10 states to provide (2) category 6A cables to each device, which is correct?
A. Two CAT. 6A cables to each WiFi (WF) device.

11. Q: Spec Section 271000 states cabling shall be category 6A, however on drawing T2.02 keynote 14 references category 6 cable, please confirm all cabling is category 6 or 6A.

A. Category 6A is correct.

12. Q: Spec section 271000-2.2-A-3-a is a wall cabinet that states 48in cube it 11996-X48, however on drawing T2.02 keynote 9 it depicts same cabinet but 24in 11996-724, which is correct? A. Drawing T2.02- Keynote 9 is correct. Cabinet is 24” 11996-724.

13. Q: RFQ stage, Addendum #3, question 8 answer states the IT room is to remain with all existing racks along with the service fiber, however, on drawing T2.02 key note 9 states to provide a cube-it wall cabinet and the specs states additional accessories per the specification, please confirm if this cabinet and fiber is existing or is required.

A. All existing server racks are to remain on-site. Bid to provide the new 24” server cabinet for security as indicated on the drawings. Field-locate the cabinet inside the

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Room Comp Storage 37. PBK is reviewing this question, so additional details may be issued with a forthcoming Addendum.

14. Q: If fiber is required, please provide type of fiber SM or MM and strand count.

A. Existing fiber feed is to remain. Locate the new cabinet close to fiber and tie-in to existing fiber following security panel manufacturer’s instructions.

15. Q: Drawing T2.02 depicts camera locations on the floor plan, (new) assume 1 cat 6A cable to each, cameras that show existing (E) do these require a category 6A cable? Some cameras do not have a new or (E) next to them, will these cameras require a category 6A cable? A. Provide (2) CAT6A cables to each new and existing building camera feed location. All existing cabling should be removed and new cabling installed, reuse conduit runs wherever feasible.

16. Q: Drawing T2.02 in regard to the site cameras, we assume the site cameras only require a category 6A cable if it’s within the 328 ft. threshold? A. Bid to provide (2) CAT6A cables to each site camera. Any extra feeds can be coiled up at the closest J-box and left for future.

17. Q: Detail 8/S1.01 includes a concrete curb detail. Please provide direction as to where these curbs are to be installed, if any.

A. Detail 8/S1.01 is a standard detail and does not appear to be referenced on the plans.

All interior walls are non-bearing and this concrete curb detail does not apply to this project.

18. Q: Specification section 12 24 13-2.2-A, indicates there are Shade Types 1 & 2. When referencing the drawings, it is unclear as to where the two types are to be installed. Please confirm the locations of the Type 1 and Type 2 shades.

A. There is only one type of manual rolling shades on the project, refer to Detail 12/A11.06. Follow specs for Type 1 for bidding purposes for exterior, manuallyoperated roller shades in exterior windows. Manual rolling shades are required at each exterior window/storefront. Type 2 does not apply to this project.

19. Q: What does the existing roofing that is going to be torn off consist of? A. The existing roof is TPO installed around 2010 and is beyond it’s usable life. There are termination bars along each of the parapets that also need to be removed. Follow Roof Plans which indicate replacement of 50% of sheathing at the roof deck and roof structural improvements throughout.

20. Q: When referencing detail 11/A10.02 of the Roof Plans, a Wood Nailer is shown underneath the TPA Membrane. Is this wood nailer to be installed New (N)? Please confirm.

A. New wood nailers above the exterior walls at the gutter locations. This new wood nailer needs to be field-coordinated to account for the thickness of insulation. Note

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that Tremco requires all roofing subcontractors to be Tremco certified, include roofing subs that are certified with Tremco or will have their certification completed prior to start of construction.

21. Q: Fabrication of Signage. We would like to bid as a manufacturer substitution and fabricate these signs in-house. We can conform to all CBC, CCR and ADA standards. Additionally, we would like to request alternative materials and fabrication methods from MP Plastic Plate and Mohawk Sign Systems Series 200A, Format D Sand Carved Process to Applied Tactile & Clear Braille on Back Painted or Pigmented Acrylic Panels. This will lower the cost and provide shorter turnaround times as we can fabricate in-house rather than outsource.

A. Bid all signs per plan. Once the bids are received and contract negotiations are underway, we may take this into account if there are cost-saving measures to discuss.

22. Q: Deductive Alternate #1 – Interior Tree Feature – Wood to Light Gauge Metal Substitution.

The rough framing for the interior tree feature is standard 2x wood. Please confirm if it would be acceptable to substitute the rough framing for light gauge metal instead. All visible finish carpentry would remain the same.

A. Bid wood framing per plan. Once the bids are received and contract negotiations are underway, we may consider changing to light-gauge metal framing if the selected team sees this as a cost-savings.

23. Q: Hazmat Report – Would you be able to send me any Hamat reports you have for the site please. I think you mentioned they did a large abatement exercise on the property recently.

A. See question below from in-person questions for an answer on this topic.

24. Q: HVAC Storage – It mentions that the existing roof top units are to be removed, stored and reinstalled once the new roof was completed. Does the City have storage space available for these units on any City premises? This could be very helpful in keeping costs down.

A. Most of the rooftop units are to be removed and replaced with Electrical HVAC units (All natural gas package units are being removed). For any HVAC units that need to be removed and reinstalled, Contractor shall make arrangements for secure on-site either in a locked Connex or another secure storage procedure.

25. Q: On the PlanetBids site, under the "Attachments" tab, there is only a section to upload the Bid Bond paperwork. Will another section(s) be provided to attach the Phase 2 - Bid Proposal Forms to?
A. We have added another tab to upload the Forms to PlanetBids. This should be for the bid proposal and all other supporting documentation such as the Local Business Enterprise (LBE), Minimum Qualification Questionnaire, etc.

26. Q: At the job walk it was noted that the building did not contain any hazardous lead or asbestos.

Is a hazardous report available for review, and should we assume the owner will cover the costs of any testing that may be required to start construction?

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A. See question below from in-person questions for an answer on this topic.

27. Q: Specification 095100 2.3 A. calls for Fine Fissured with linear plank pattern (secondlook). Item 4 calls for LR .85 while specified tile only has .82. Item 5 calls for NRC .65 while specified tile only has .55. Please confirm we are to provide Fine Fissured secondlook even though it doesn’t meet performance requirements. Finish schedule also calls for Fine Fissured.

A. Spec 095100 Section 2.3.A is ACT-1- Acoustical Ceiling Tiles. A detailed response from PBK is pending and will be issued with an upcoming Addendum.

28. Q: On A10.10, the finish schedule calls for wall panels to be tackboard. Specification 098413 Part 2 calls for Armstrong SoundSoak standard acoustical wall panel which is not tackable. Please confirm which is correct.

A. The tackboards are not acoustical wall panels and need to be tackable. Refer to the plans, tackboards are to meet the dimensions indicated on plans and include tackable surface and mounting hardware. Include shop drawings to confirm final materials and mounting techniques in each bid. A detailed response is forthcoming from PBK and additional details will be issued with an upcoming Addendum.

29. Q: Detail 24/A11.06 shows details for ceiling clouds but this detail is for a specific Ecophon product. Specified product is by CSI so this method is not an option. Please provide required mounting method from CSI’s options.

A. A detailed response from PBK is forthcoming and will be issued with an upcoming Addendum.

30. Q: On page A10.01 - Door & Window Schedules, 1GL says to have gray tint insulating glass can you please confirm if interior glass is to be gray tinted.

A. A detailed response from PBK is forthcoming and will be issued with an upcoming Addendum.

31. Q: Sheet G0.00 notes the exterior Awnings as a Deferred Approval Item for Structural design, calculations and drawings. However, the AOR provides the awning design requirements and the SEOR drawings contains detail 6/S4.01 which provides the anchorage details for the awnings. Please confirm if the Awnings are required to be a deferred approval, which may deviate from the existing anchorage detail.

A. Yes, the awnings are required as a deferred approval item. Contractor to hire a Structural Engineer (SE) and provide shop drawings for final product selected and for review prior to fabrication. Use design and mounting details as bid information, and include cost to hire SE for shop drawings. Include in your bid costs for separate permit for awnings. PBK is reviewing this question and additional details may be included in a future Addendum.

32. Q: Specification 122413 have Type 1 (1000 Series) & Type 2 (0890 Series) shades but the plans do not have the types shown anywhere. The RCP's & Int elevations show locations but not fabric

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types. These are very different fabric types and the specs states "as indicated on the drawings".

However, the drawings do not indicate which material type is to be used. Please clarify which material type is to be used for each window.

A. See question above for an answer on this topic regarding manual rolling shades.

33. Q: There are two sets of mechanical plans. One is in the "remodel" set and the other is in the "roof" set. The mechanical equipment schedule is different on each set, and the drawing dates are very different. The "roof" mechanical set is dated 8/10/23 while the "remodel" mechanical set is dated 5/23/25. Also, the "roof" set shows the heat pumps as add alternate #1 on sheet M0.01, but that doesn't match up with your description of the alternates in the Bidders description. We're assuming the "remodel" set dated 5/23/25 is to be used for bidding - Please confirm.

A. A detailed response from PBK is forthcoming and will be issued with an upcoming Addendum. See question below from site walk on outline of Mechanical scope.

Questions Received In-Person (at Mandatory Site Walk on 8/5/25):

34. Q: What is the timeline for construction?
A. City anticipates starting construction in early Fall 2025, with completion by the end of the Calendar Year 2026. This project is funded with State Grant funding so key deadlines will need to be met and those will be discussed with the selected team.

35. Q: What is the Mechanical Scope?
A. On the roof permit package, remove all existing gas pack units and replace with electrical HVAC units. On the remodel package- Additional Electrical Package and Split systems are to be installed. For interior improvements, some of the ductwork is existing to remain and some is new. Bid to clean all existing ducts and registers to remain and include Test and Balance report along with commissioning of all units.

There is also a BMS system so that should be included along with testing and startup.

36. Q: Storefront glazing- replace glazing and mullions or just glazing? A. For the additive alternative, please bid to replace glazing only. Remove interior mullion facing, install new dual-pane glass and reinstall existing mullions. Adjustments to the mullions and new spacers or pieces may be required, but the existing mullions are to remain and be modified to receive the new glazing.

37. Q: On the Finish Plan it calls for EXT- Existing Concrete to be finished, what is that product and process?
A. Grind concrete down to stable finish and remove top colorant coating to reveal a flat floor finish. Fill in any cracks or divots with a concrete epoxy filler and set flush. Clean bare concrete to prepare for sealer and sweep floor clean. Apply three (3) coats of Concrete Sealer Matte finish and let dry. After dried for minimum 24 hours, install floor protection over the top of the concrete areas to avoid scuffing or damage to finish during construction. Note: Substitutions for sealer will only be considered after

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the bid process is completed. A Specification section and additional details including a specified product will be issued with an upcoming Adddendum.

38. Q: What are the expected working hours?
A. Standard Monday through Friday hours, typical hours we see are 6AM-4PM. Noise ordinance allows noisey work (i.e. tools, loud trucks, etc) to operate from 7AM- 10PM.

For any early work (i.e. 5AM concrete pour), a minimum 48-hours notice will be required to alert surrounding residences and businesses of the upcoming work. Since there are apartments and housing directly behind and surrounding the site, advanced notice of early work will be required.

39. Q: Do you have a bid form along with this bid that we should be filling out or is this just lump sum?
A. There is a bid form, please review the documents on PlanetBids. Please look it over and let us know if there are any discrepancies in the information provided so we can update the bid form accordingly. Please note that base bid final cost will be the determining factor in the bid award. We still need the line-items filled, Add Alt and Deduct Alt pricing to determine final scope, but the base bid lump sum amount will determine the low-bidder.

40. Q: Is a survey required to be provided by the GC?
A. Setting grades to meet all slopes and maximum slopes at exterior improvements is the responsibility of the selected Contractor, and ensuring bottom slope break is achieved to meet code. Selected Contractor will need hire a surveyor to set a basepoint and staking to meet the Civil design grade requirements.

41. Q: Are you able to provide unlocked plans, my subs are having a hard time doing take-offs? A. Yes, unlocked PDF plan sets will be issued along with this addendum.

42. Q: Where do we need to cut openings on the west side of the building? What about the south side?
A. Refer to the Structural drawings in the plans, there is a double door opening that will need to be cut into the existing CMU wall. Note that the existing mural needs to be protected throughout construction including murals on the west and south elevations.

On the south side facing the alley, follow the Structural drawings for a steel frame that gets inserted into the existing cut openings.

43. Q: There are existing Fire Extinguishers, what is the scope? A. Follow the plans, which call for new semi-recessed fire extinguisher cabinets and fire extinguishers. Any re-used or re-installed fire extinguishers need to have an annual inspection and be tagged current to pass any Fire Final Inspection.

44. Q: Is there a Hazardous Materials report and if so what are the results?

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A. Yes, all testing performed in 2022 generated “none detected” for asbestos and leadbased paint. We will provide a copy of this report as part of this Addendum. Please include in your bid an Allowance under the General Conditions line-item that covers $30,000 for hazardous materials abatement demolition. This will be reviewed on a case-by-case basis and all testing of suspect materials will be by others and conducted by City of Sacramento. No use of the allowance will be utilized without authorization from City PM and/or CM.

45. Q: Plans call for existing T-bar to remain and be painted what is the scope on the ceiling tile? A. Existing t-bar is to remain wherever called out on the plans. Paint existing t-bar track system and repair any damage or modified track during construction. Replace all T-Bar ceiling tiles in-kind with new after all utility runs are completed.

46. Q: What is the scope for sheetrock on the restroom ceilings? A. Bid to remove existing gypsum board ceiling at Men’s and Women’s restrooms and single-occupancy restrooms down to ceiling joists. Install new gypsum board, paint over gypsum board and follow finishes on the Finish Plan. For additional details on scope, refer to the plans.

NOTE: Please provide a completed bid form prior to the posted deadline on PlanetBids. Additional technical details are pending review with PBK and will be issued with a forthcoming Addendum.

ENTEK
CONSULTING GROUP, INC. 4200 Rocklin Road, Suite 7, Rocklin, CA 95677 Phone (916) 632-6800 Fax (916) 632-6812 www.entekgroup.com

ASBESTOS LEAD MOLD INDOOR AIR QUALITY NOISE MONITORING TRAINING HEALTH AND SAFETY AUDITS

HAZARDOUS MATERIALS SURVEY

FINAL REPORT

OWNER/CLIENT
City of Sacramento
Department of Public Works Facilities &
Real Property Management
5730 24th Street, Building 4
Sacramento, CA 95822

CONTACT
Mr. Jim Roehl
Environmental Program Manager,
Brownsfields & HazMat

SURVEY ADDRESS
1124 Del Paso Road
Sacramento, California 95815

BUILDING SURVEYED
Sacramento News & Review Building
Phase 1 – Roof Replacement Project

PREPARED BY
Karl Suarez
CSST # 21-6935 and CDPH IA #11068
Entek Consulting Group, Inc.
4200 Rocklin Road, Suite 7
Rocklin, CA 95677
Entek Project #23-6713
June 9, 2023
ENTEK

TABLE OF CONTENTS
Executive Summary........................................................................................ 3 Introduction ..................................................................................................... 4 Building Description ........................................................................................ 4 Asbestos Inspection and Sample Collection Protocols ................................. 4 Asbestos Bulk Sample Results....................................................................... 5 Asbestos Regulatory Requirements............................................................... 6 Lead Inspection, Sampling, & Results ........................................................... 7 Lead Regulatory Compliance ......................................................................... 7 Limitations ....................................................................................................... 7 Appendices
A. Asbestos Related Documents
B. Lead Related Documents
C. Backup Documents
ENTEK
3 Hazardous Materials Survey Report – Sacramento News & Review Building – Roofing Replacement Project
Executive Summary
Entek Consulting Group, Inc. (Entek) is pleased to provide Mr. Jim Roehl, Environmental Program Manager for the City of Sacramento with this limited asbestos and lead survey report regarding the upcoming Roofing Replacement Project at the Sacramento News & Review Building located on 1124 Del Paso Boulevard in Sacramento, California.

The purpose of the inspection was to comply with the US EPA NESHAP requirements and the Sacramento Metropolitan Air Quality Management District (SMAQMD), which has jurisdiction for this project site to determine if asbestos containing materials are present which may be impacted during the upcoming Roofing Renovation Project. Anticipated work will be broken into two phases. Phase 1 will include renovation of the roof. Phase 2 will include renovation of the interior building components. For purposes of this report, this limited asbestos and lead survey is only for the Phase 1 Roofing Renovation Project.

It is our understanding that the Sacramento News and Review Building was constructed in the 1940s, with major renovations to the interior and exterior of the building occurring in approximately 2016.

The United States Environmental Protection Agency, National Emission Standards for Hazardous Air Pollutants (US EPA NESHAP), 40 CFR Part 61 - Nov. 20, 1990, requires an owner or operator of a demolition or renovation project to thoroughly inspect the affected facility or part of the facility where the demolition or renovation operation will occur for the presence of asbestos-containing materials (ACM) prior to the commencement of that project.

The attached drawing shows approximate sample locations and also identify those bulk sample materials analyzed and found to contain asbestos greater than 1% with a (+) after the sample number. Materials analyzed and found to contain less than 1% asbestos or reported as none detected have a (-) after each sample number. However, in some cases when several samples of one homogenous material are collected, sometimes not all samples are analyzed by the laboratory. In this instance, if one sample for a homogeneous material is reported as containing asbestos greater than 1%, then the remaining samples in the series that are not analyzed are assumed to contain asbestos greater than 1%. For the purposes of this report, all samples that were not analyzed in a series are assumed to contain asbestos greater than 1% and are identified on the attached drawing with a (+) after the sample number.

Contractors and other individuals who view the sample locations and associated results indicated with either a (-) or a (+) on the drawing(s) to make determinations take the risk of misidentifying a material and may arrive at determinations which are in direct conflict with the written findings of this report. This use of the drawing and the information provided on it relating to individual sample results in determining if a material does or does not contain asbestos is not recommended.

The report must be read in its entirety prior to making any interpretations or conclusions pertaining to the information. Any conclusions made by the reader about the information provided in the body of this report which are contradictory or not included in this report are the responsibility of the reader.

ENTEK
4 Hazardous Materials Survey Report – Sacramento News & Review Building – Roofing Replacement Project
Asbestos
On May 23, 2023, Entek conducted a limited asbestos and lead survey specific to the roof areas designated by Jim Roehl, Environmental Program Manager for the City of Sacramento.

None of the materials collected were determined to contain asbestos. Specifics pertaining to individual materials are found in later parts of this report.

Lead
Entek investigated the existing paints that may be impacted by the renovation project to determine if lead was present. All paints collected from the exterior components that are expected to be impacted by the Roofing Renovation Project were determined to be below the laboratory’s detectable limit of 100 parts per million (ppm).

Introduction
This report presents results of a limited asbestos and lead survey performed by Entek which included the roofing materials of the Sacramento News & Review Building located at 1124 Del Paso Boulevard in Sacramento, California. These areas were designated by Jim Roehl, Environmental Program Manager for the City of Sacramento.

The inspection was conducted on May 23, 2023, by Mr. Karl Suarez who is a Cal/OSHA Certified Site Surveillance Technician (CSST) and a California Department of Public Health Lead Inspector Assessor (I/A).

This report was prepared for Mr. Jim Roehl, Environmental Program Manager for the City of Sacramento.

Building Description
The Sacramento News & Review Building is a multistory wood framed building with a concrete slab foundation. The survey area included the entire roofing system of the Sacramento News & Review Building. The roofing materials consisted of a single ply membrane roofing and roofing penetration mastics.

Asbestos Inspection and Sample Collection Protocols
Entek included all specific designated roofing materials that are expected to be impacted by the upcoming Roofing Renovation Project in this report.

Entek did not use any demolition methods to look within enclosed wall or ceiling cavities during this investigation. Entek did include all suspect materials observed in, on, or associated with the areas included in this report.

Bulk samples were collected of various materials suspected to contain asbestos by utilizing a power drill and coring tube, cutting the materials with a razor knife, or use of other appropriate hand tools.

ENTEK
5 Hazardous Materials Survey Report – Sacramento News & Review Building – Roofing Replacement Project
Miscellaneous materials were collected from each homogenous area in a manner sufficient to determine whether the material is or is not ACM as required in 40 CFR Part 763, Asbestos-Containing Materials in Schools; Final Rule and Notice, published October 30, 1987.

Approximate locations of all samples collected during this inspection are indicated on the “Bulk Asbestos Material Analysis Request Form for Entek”, which served as the chain of custody for the samples, and on the building diagram(s) attached to this report.

Asbestos Bulk Sample Results
There were several materials observed which are considered “suspect” under US EPA guidelines. Under current US EPA guidelines for conducting building inspections for ACM, all "suspect" materials must be assumed to contain asbestos until otherwise determined by laboratory testing.

The samples of materials suspected of containing asbestos were submitted to Asbestech, a laboratory located in Carmichael, California. These samples were subsequently analyzed utilizing USEPA Method 600 by polarized light microscopy (PLM) with dispersion staining. Asbestech is a NVLAP accredited program.

The US EPA NESHAP and SMAQMD use the terms Regulated Asbestos Containing Material (RACM), Category I, and Category II when identifying materials which contain asbestos in amounts greater than 1%. Cal/OSHA uses the term ACCM which indicates a manufactured construction material contains greater than 0.1% asbestos by weight by the PLM method. This definition can be found in Title 8, 1529.

A total of 14 bulk samples were collected of all the materials considered to be "suspect", which had not been previously sampled, and which were observed during this investigation. Some of those samples contained multiple layers which were individually analyzed to determine their asbestos content. Analysis of all samples collected was by PLM with dispersion staining. Results of the analysis are listed in the following table:

Suspect Materials Found NOT TO Contain Asbestos
Sacramento News & Review Building, Roof
Sample
ID#’s
Suspect
Material

EPA AHERA
“Suspect”
ACBM
Asbestos
Content
Location
01A-H Singly Ply Roofing
Membrane with Vapor
Barrier
Miscellaneous
Material
None Detected Throughout Roof
02A-B Gray Pipe Penetration
Mastic with Foil Backing
Miscellaneous
Material
None Detected Throughout Roof at
Pipe Penetrations
03A-B Gray Pipe Penetration
Mastic
Miscellaneous
Material
None Detected Throughout Roof at
Pipe Penetrations
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6 Hazardous Materials Survey Report – Sacramento News & Review Building – Roofing Replacement Project
Suspect Materials Found NOT TO Contain Asbestos
Sacramento News & Review Building, Roof
Sample
ID#’s
Suspect
Material

EPA AHERA
“Suspect”
ACBM
Asbestos
Content
Location
04A Black Singly Ply Roofing
Membrane over White
Single Ply Roofing
Membrane
Miscellaneous
Material
None Detected Throughout Roof
05A Black Roofing Patch Miscellaneous
Material
None Detected Throughout Roof
All sample numbers noted in the table above start with ECG-23-6713- Any building materials which are considered “suspect” for containing asbestos which have not been identified in this report must be assumed to contain asbestos in amounts >1% until properly investigated and/or tested.

Materials commonly excluded from being suspected of containing asbestos include, but are not limited to: unwrapped pink and yellow fiberglass insulating materials or products, foam insulation, wood, metal, plastic, or glass. All other types of building materials or coatings on the materials listed above are commonly listed as “suspect” and must be tested prior to impact by a Contractor. Work impacting these untested or newly discovered materials must cease until an investigation can be completed.

Asbestos Regulatory Requirements
US EPA
The property included in this survey report is located in Sacramento County. Sacramento Metropolitan Air Quality Management District (SMAQMD) has been given authority for enforcement of the NESHAP regulations by means of their own rules (Rule 902 Asbestos).

A demolition is the wrecking, taking out, or burning of any load supporting structural member. A renovation is everything else. 10-day written notification to the US EPA Region IX, CARB or local AQMD is required prior to the performance of any demolition project regardless of asbestos being present or not. This notification would also apply to any renovation project which involves the wrecking, taking out, or burning of any load bearing structural member during a renovation as well.

Since none of the materials sampled were determined to contain asbestos, a 10-day notification to the SMAQMD is not required to be submitted prior to starting work for asbestos reasons.

Cal/OSHA
Disturbance of any ACM or ACCM could generate airborne asbestos fibers and would be regulated by Cal/OSHA. Cal/OSHA worker health and safety regulations apply during any ENTEK
7 Hazardous Materials Survey Report – Sacramento News & Review Building – Roofing Replacement Project
disturbance of ACM or ACCM by a person while in the employ of another. This is true regardless of friability or quantity disturbed.

Since none of the materials anticipated to be impacted as part of this project were determined to contain asbestos, a licensed asbestos contractor, registered with Cal/OSHA is not required to perform the demolition/renovation work.

Lead Inspection, Sampling, & Results
Two (2) bulk samples of the painted surfaces expected to be impacted by the renovation project were collected and submitted to MicroTest Laboratories, Inc. These samples were subsequently analyzed by atomic absorption spectrometry (AAS). Results of the analysis are listed in the following table:

Paints/Coatings/Materials Determined NOT TO Contain Lead (<100 ppm) Paint/Coating Color or Material Building Component
Gray Paint over White Paint Concrete Masonry Block – Northeast Side of Roof Red Paint over Gray Paint Metal Roof Flashing – Around Perimeter of Roof Paints determined “NOT TO” contain lead for the purposes of this report are those samples which when analyzed did not indicate lead to be present at or above the limit of detection for the analysis method used. This limit of detection was 100 parts per million (ppm). As a result, any paints shown “NOT TO” contain lead will not require any special training or work practices related to lead when impacted.

Lead Regulatory Compliance
Any upcoming project which may result in the disturbance of lead containing products or surfaces but is not intended to remediate a lead hazard or specifically designed to remove LBP to reduce or eliminate a known hazard, would be considered “lead related construction work”.

Since no detectable amount of lead was found, CAL OSHA regulations found in 8 CCR 1532.1 Lead in Construction will not apply to this project.

Limitations
Entek inspected only the specific designated areas identified by Jim Roehl, Environmental Program Manager for the City of Sacramento to be included in the Roofing Renovation Project, which did not include all areas of the building’s interior and exterior components.

This survey consisted of the single ply roofing membrane, caulking, penetration mastics, paints on concrete masonry block wall, and metal flashing on the roof of the Sacramento News & Review Building. As a result, the information provided in this inspection report may not be used to extend the inspection results to areas not included in this report without additional review and sampling as necessary.

Entek did not perform any destructive sampling to look into ceiling and wall cavities. As a result, it may be possible for materials to be hidden in these areas which are not included ENTEK
8 Hazardous Materials Survey Report – Sacramento News & Review Building – Roofing Replacement Project
in this report. Entek also did not employ any destructive measures on floors of interior spaces or exterior areas covered with asphalt, concrete, or dirt.

If any new materials not listed as having been sampled, or listed as assumed for containing asbestos or lead in this report are discovered, the new material must be assumed to contain asbestos or lead until properly inspected and tested for asbestos content.

Entek’s policy is to retain a full copy of these written documents for three (3) years once the file is closed. At the end of the 3-year period the written files will be destroyed without further notice. It is suggested copies of the file(s) are maintained as per your policy.

Entek will be providing only this electronic copy of the report and its attachments for your use. However, if you would like a hard copy of this report please do not hesitate to ask.

Entek will be happy to mail the report upon receipt of your request.

Thank you for choosing Entek for your environmental needs. Please call me at (916) 632- 6800 if you have any questions regarding this report.

Prepared by:

Karl Suarez
Assistant Project Manager
Cal/OSHA CSST #21-6935
CDPH I/A #11068
Appendices
A. Asbestos Related Documents
B. Lead Related Documents
C. Backup Documents
Reviewed by:

Blake Howes
Vice President
Cal/OSHA CAC #13-5015
CDPH I/A #3315
ENTEK

APPENDIX A

ASBESTOS RELATED DOCUMENTS
Bulk Asbestos Analysis Report From Asbestech
Bulk Asbestos Material Analysis Request Form for Entek Asbestos Bulk Sample Location Drawing
SMAQMD Asbestos Survey Form
SMAQMD Demolition/Renovation Form
(To be completed by Owner)

ASBESTECH
11151 Sun Center Drive, Suite B
Rancho Cordova, California 95670
Tel.(916) 481-8902 [email protected]
______________________________________________________________________________ THE ANALYSIS USES POLARIZED LIGHT MICROSCOPY AND DISPERSION STAINING FOLLOWING E.P.A. METHOD 600/R-93/116. NON-FRIABLE MATERIALS WERE ANALYZED APPLYING THE SAME METHOD. THE LOWER DETECTION LIMIT IS <1 % WITH THE PROVISO THAT PLM MAY NOT DETECT FIBERS <0.25 MICRONS IN DIAMETER THAT MAY BE PRESENT IN SAMPLES SUCH AS FLOOR TILES. IN ACCORDANCE WITH TITLE 22, CCR, SECTION 66261.24(a)(2)(A),THE MCL IS 1 %. SAMPLES WERE NOT COLLECTED BY ASBESTECH. THIS REPORT MUST NOT BE REPRODUCED EXCEPT IN FULL WITHOUT THE APPROVAL OF ASBESTECH. THIS REPORT RELATES ONLY TO THE ITEMS TESTED. THIS REPORT MUST NOT BE USED TO CLAIM PRODUCT ENDORSEMENT BY N.V.L.A.P. OR ANY AGENCY OF THE U.S. GOVERNMENT. ASBESTECH ACCEPTS TECHNICAL RESPONSIBILITY FOR THIS REPORT AND DATE OF ISSUE.

NVLAP LAB CODE 101442-0 LAB DIRECTOR: TOM CONLON ANALYST: JIM JUNGLES Client: Job:

Entek Consulting Group, Inc. 23-6713 City of Sacramento 4200 Rocklin Rd., Suite 7 Sacramento News & Review Bldg., 1124 Del Paso Blvd.

Rocklin, CA 95677 Sacramento, Ca

BULK ASBESTOS ANALYSIS REPORT
LAB JOB # 70422-1 NVLAP Lab Code 101442-0
Date/Time Collected: 5/23/23 CDPH # 1153
Date Received: 5/23/23 Date Analyzed: 5/24/23
Sample No. Color/Description % Type Asbestos Other Materials ECG-23-6713-
01A White single ply membrane roofing, NONE DETECTED Rubber NW of roof
White vapor barrier NONE DETECTED Gypsum
Fibrous Glass
01B White single ply membrane roofing, NONE DETECTED Rubber SW of roof
White vapor barrier NONE DETECTED Gypsum
Fibrous Glass
01C White single ply membrane roofing, NONE DETECTED Rubber west of roof
White vapor barrier NONE DETECTED Gypsum
Fibrous Glass
01D White single ply membrane roofing, NONE DETECTED Rubber NW of parapet roof
White vapor barrier NONE DETECTED Gypsum
Fibrous Glass
01E White single ply membrane roofing, NONE DETECTED Rubber NE of parapet roof
White vapor barrier NONE DETECTED Gypsum
Fibrous Glass

NVLAP LAB CODE 101442-0 LAB DIRECTOR: TOM CONLON ANALYST: JIM JUNGLES Client: Job:

Entek Consulting Group, Inc. 23-6713 City of Sacramento 4200 Rocklin Rd., Suite 7 Sacramento News & Review Bldg., 1124 Del Paso Blvd.

Rocklin, CA 95677 Sacramento, Ca

BULK ASBESTOS ANALYSIS REPORT
LAB JOB # 70422-2 NVLAP Lab Code 101442-0
Date/Time Collected: 5/23/23 CDPH # 1153
Date Received: 5/23/23 Date Analyzed: 5/24/23
Sample No. Color/Description % Type Asbestos Other Materials ECG-23-6713-
01F White single ply membrane roofing, NONE DETECTED Rubber west center of roof
White vapor barrier NONE DETECTED Gypsum
Fibrous Glass
Black roofing NONE DETECTED Tar Binder
Fibrous Glass
01G White single ply membrane roofing, NONE DETECTED Rubber center of roof
White vapor barrier NONE DETECTED Gypsum
Fibrous Glass
Black roofing NONE DETECTED Tar Binder
Fibrous Glass
01H White single ply membrane roofing, NONE DETECTED Rubber east of roof
White vapor barrier NONE DETECTED Gypsum
Fibrous Glass
02A Gray pipe penetration mastic, NONE DETECTED Calcite west of roof at pipe penetration
Silver foil backing NONE DETECTED Opaques

NVLAP LAB CODE 101442-0 LAB DIRECTOR: TOM CONLON ANALYST: JIM JUNGLES Client: Job:

Entek Consulting Group, Inc. 23-6713 City of Sacramento 4200 Rocklin Rd., Suite 7 Sacramento News & Review Bldg., 1124 Del Paso Blvd.

Rocklin, CA 95677 Sacramento, Ca

BULK ASBESTOS ANALYSIS REPORT
LAB JOB # 70422-3 NVLAP Lab Code 101442-0
Date/Time Collected: 5/23/23 CDPH # 1153
Date Received: 5/23/23 Date Analyzed: 5/24/23
Sample No. Color/Description % Type Asbestos Other Materials ECG-23-6713-
02B Gray pipe penetration mastic, NONE DETECTED Calcite east of roof at pipe penetration
Silver foil backing NONE DETECTED Opaques
03A Gray pipe penetration mastic, NONE DETECTED Calcite west of roof at pipe penetration Opaques
03B Gray pipe penetration mastic, NONE DETECTED Calcite east of roof at pipe penetration Opaques
04A Black single ply membrane roofing NONE DETECTED Rubber over white single ply membrane roofing,
NW of roof
05A Black roofing patch, west of roof NONE DETECTED Tar Binder Cellulose
Analysis Reguesf

A E,TEK

BULK ASBESTOS MATERIAL
Erurex Corusulrrnc Gnoue, lnc.
4200 Rocxlrr.r Roao, SurrE 7
Rocxr-rr.r, CA 95677
(916) 632-6800 Pnoue
(916) 632-6812 Fax
main office@entekq rou o. com
Date of Sampling: 5123123
Job Number:23-6713
CIient Name: City of Sacramento
Site Address: Sacramento News & Review Building
1124 Del Paso Blvd,
Sacramento, CA
Special lnstructions: Sfop analysis upon first positive result (>1%) for sample rn a series. A/so sfop analysis upon first positive result (>1%) in the joint compound for sample sedes.

Please e-mail results at [email protected] and [email protected] as soon as available and include copy of submittalwith those results.

Https://entekgroupinc.sharepoint.com/sites/Entekgroup/Shared Documents/Clients/City of Sac/23-6713 Sac News & Review Roof - Asbpb/Bulk Asb/5- 23-23.docx
Lab: Asbestech
Collected by: Karl Suarez
Turnaround Time: Thursday, 5125123, End of
day
ANALYSIS REQUESTED: Asbestos by PLM
with Dispersion Staining
Delivered by:

Received by:

Date:

Page 1 of 1 ends

SLUI zS rime: l:91 o*t@
SAMPLE #
ECG-23-6713-01A Single Ply-Roofing Membrane, With Vapor Barrier, Northwest of Roof ECG-23-6713-018 Single Ply-Roofing Membrane, With Vapor Barrier, Southwest of Roof ECG-23-6713-01C Single Ply-Roofing Membrane, With Vapor Barrier, West of Roof ECG-23-6713-01 D Single Ply-Roofing Membrane, With Vapor Barrier, Northwest of Parapet Roof ECG-23-6713-01E Single Ply-Roofing Membrane, With Vapor Barrier, Northeast of Parapet Roof ECG-23-6713-01F Single Ply-Roofing Membrane, With Vapor Barrier, West Center of Roof ECG-23-6713-01c Single Ply-Roofing Membrane, With Vapor Barrier, Center of Roof ECG-23-6713-01H Single Ply-Roofing Membrane, With Vapor Barrier, East of Roof ECG-23-6713-02A Grey Pipe penetration Mastic With Foil Backing, West of Roof at Pipe Penetration ECG-23-6713-028 Grey Pipe penetration Mastic With Foil Backing, East of Roof at Pipe Penetration ECG-23-6713-03A Grey Pipe Penetration Mastic, West of Roof at Pipe Penetration ECG-23-6713-038 Grey Pipe Penetration Mastic, East of Roof at Pipe Penetration ECG-23-6713-04A Black Single Ply-Roofing Membrane over White Single Ply-Roofing Membrane, Northwest of Roof
ECG-23-6713-05A Black Roofing Patch, West of roof
2h-*'*", ffi:^W

MATERIAL DESCRIPTION/LOCATION
Entek Consulting Group, Inc.
4200 Rocklin Road, Suite 7
Rocklin, CA 95677
Map Not to Scale
City of Sacramento
Sacramento News & Review Building
1124 Del Paso Road
Sacramento, CA
Bulk Asbestos Sampling Map
Collected by Karl Suarez
On 5/23/23
Project Number 23-6713
01A
(-)
01B
(-)
01C
(-)
01D
(-)
01E
(-)
01F
(-) 01G
(-)
01H
(-)
02A
(-)
03A
(-)
02B
(-)
03B
(-)
Asbestos Survey Form
(See Instructions)
777 12th Street, 3rd Floor
Sacramento, CA 95814
Office (916) 874-4800
Fax (916) 874-4899
Email:
[email protected]

1. Purpose of Survey Renovation Demolition

2. Facility Information
Project Area(s) Description
Address City # of
Structures

3. Owner Information
Name
Address City/State Zip
Contact Phone Fax Email

4. Consultant Information Survey Date(s):

Company Name Entek Consulting Group, Inc.

Name DOSH #
Address
4200 Rocklin Road, Suite 7
City/State
Rocklin, California
Zip
95677
Phone
(916) 632-6800
Fax
(916) 632-6812
Email Signature

5. Client Information (If different than owner) 9 General Contractor 9 Insurance Company 9 Architect 9 Property Manager 9 Other
Name
Address City/State Zip 95678
Contact Phone Fax Email

6. Have all of the suspect materials that will be disturbed been sampled? Yes 9No
If no, explain why:

7. Summary of Total Asbestos Containing Material (ACM) Findings Regulated Asbestos Containing Material (RACM)
(Includes materials subject to known mechanical removal and fire damaged materials)
Category II Category I
Square Ft. Linear Ft. Cubic Ft. Square Ft. Linear Ft. Square Ft. Linear Ft.

To receive future SMAQMD Rule updates and changes affecting your industry (check one box):
9 Please send e-mail notices to 9 I will sign up myself at www.airquality.org/listserve/ to receive emailed notices. I am already subscribed. 9 I want the District to mail notices to the address on this application: 9 Owner 9 Consultant Rev 4/13 Z:\Initial Project Setup 2-1-17\SMAQMD Forms\SMAQMD Asbestos Survey Form 2019.wpd 95822
13-5015
Sacramento
Revised June 2021
Asbestos Renovation/Demolition
Notification Form
777 12th Street, 3rd Floor
Sacramento, CA 95814
Office (279) 207-1122
Fax (279) 207-1144
[email protected]
1 Building Department Permit Application # (if known) :
___________________________________________
Renovation (Do not complete Section 5)
Demolition (Complete all sections)
Ordered Demo - Attach ordered demo letter
Emergency Demo - SMAQMD Emergency #: _____
2 Contractor Owner
Address Address
City, State / Zip City, State / Zip
Email Email
Telephone Telephone
3 Structure Name Renovation Area # of
Floors
Project Address City / Zip Year
Built
4 Preference for
return of form
E-mail : Other :

DEMOLITION ONLY – Start date must be at least 10 working days from the day of your postmark or hand delivery of this form. 5 Start Date ______/______/______
Completion Date ______/______/______
Revision # 1 2 3 4 5 6 7 8 9 (circle)
New Start Date ______/______/______
New Completion Date ______/______/______
Method of Demo (Check Applicable): Manual/Hand Tools Mechanical/Heavy Equipment Other Procedure to be followed if RACM is found or Category II material becomes friable:

I have read and understand the directions. The information on this form is true and accurate.

I certify that the asbestos survey conducted represents the facility as built. 6 Applicant Name (Print) Owner
Rep / Agent
Contractor
Permit may be issued on:

Phone Number
Applicant’s Signature Date
Have DOSH Consultant complete and sign below OR attach completed Asbestos Survey Form and Consultant’s report.

CONSULTANT USE ONLY
Company Name Telephone
Surveyor Name DOSH # Survey Date
Analytical Method Pt Count Materials <10%? Yes No Declined by Client Amount of RACM Square Feet Linear Feet Cubic Feet
Amount of Category I Amount of Category II
Project Address City Zip
Suspect Materials Present? Yes No Consultant’s Signature

SMAQMD USE ONLY
Date Received / Date Postmarked ______________ Date Approved & Returned ______________ Project # _____________ Check # _____________ Receipt # _____________ Amount Paid _____________ Staff _____________ 13-5015
Sacramento 95815
ENTEK

APPENDIX B

LEAD RELATED DOCUMENTS
Lead in Paint Samples Analysis Report From Microtest
Bulk Lead Material Analysis Request Form for Entek
Lead Bulk Sample Location Drawing
Lead Hazard Evaluation Report (CDPH 8552)

CLIENT INFORMATION JOB SITE INFORMATION
Date
Time
[email protected]
Units
Units
Wt % PPM
Wt % PPM
Analyst:
1 of 1
***for office use only***
Company Entek Consulting Group, Inc SAMPLE Sampler Karl Suarez MicroTest Laboratories, Inc. | AIHA ELPAT #160934 Project ID 3110 Gold Canal Dr, Ste. A, Rancho Cordova, CA 95670 PH 916.567.9808 | FX 916.404.0302 L32535-36 www.microtestlabsinc.com | [email protected] Address 4200 Rocklin Road, Suite 7 Site Sacramento News & Review Building Name Ryan Metzen Tuesday, May 23, 2023 Project City of Sacramento Email [email protected] Job # 23-6713
Rocklin, CA 95677 Address 1124 Del Paso Blvd
Analytical Data
EPA METHOD 7420/7000B
Client Laboratory Reporting
Phone 916.632.6800 MicroTest Laboratories Sacramento, CA Client Results
Comments
ECG-23-
6713-01Pb
L32535 Gray Paint over White Paint , Northeast of Roof, On Concrete Masonry Block
Paint <0.01% 0.01%
Sample ID Sample ID Sample Location / Description Matrix Results Limits <100
ECG-23-
6713-02Pb
L32536 Red Paint over Gray Paint, East of Roof, on Metal Roof Flashing
Paint <0.01% 0.01%
Analytical Page #
Authorized Signatory:

Kelly Favero - Lab Manager
This report applies to the standards and procedures indicated and to the specific samples analyzed. Samples have NOT been corrected for blank values. EPA 3050B Hotblock Preparaton Method
Samples Received: 2
Samples Analyzed: 2
Erich Bowman
Tuesday, May 23, 2023
Wednesday, May 24, 2023
Thursday, May 25, 2023
Date Received:

Date Analyzed:

Date Reported:
<100
Document # MT-FAA 1.1
Authorized by Kelly Favero
Proprietary to MicroTest Laboratories, Inc
Issue Date: 03/02/18 Rev: 5
L32535-36
Entek Consulting Group, Inc.
4200 Rocklin Road, Suite 7
Rocklin, CA 95677
Map Not to Scale
City of Sacramento
Sacramento News & Review Building
1124 Del Paso Road
Sacramento, CA
Bulk Lead Sampling Map
Collected by Karl Suarez
On 5/23/23
Project Number 23-6713
01Pb
02Pb

LEAD HAZARD EVALUATION REPORT
State of California—Health and Human Services Agency California Department of Public Health Section 1 — Date of Lead Hazard Evaluation _____________________ Section 3 — Structure Where Lead Hazard Evaluation Was Conducted Lead Inspection Risk assessment Clearance Inspection Other (specify) _____________________________ City County Zip Code
Construction date (year)
of structure
Type of structure
Multi-unit building School or daycare
Single family dwelling
Section 4 — Owner of Structure (if business/agency, list contact person) Address [number, street, apartment (if applicable)] City State Name Telephone number
Section 5 — Results of Lead Hazard Evaluation (check all that apply) No lead-based paint detected
No lead hazards detected
Intact lead-based paint detected
Lead-contaminated dust found
Section 6 — Individual Conducting Lead Hazard Evaluation Name
Name and CDPH certification number of any other individuals conducting sampling or testing (if applicable) CDPH certification number Signature Date
Section 7 — Attachments
A. A foundation diagram or sketch of the structure indicating the specifc locations of each lead hazard or presence of lead-based paint;
B. Each testing method, device, and sampling procedure used; C. All data collected, including quality control data, laboratory results, including laboratory name, address, and phone number.

First copy and attachments retained by inspector
Second copy and attachments retained by owner
Third copy only (no attachments) mailed or faxed to:

California Department of Public Health
Childhood Lead Poisoning Prevention Branch Reports
850 Marina Bay Parkway, Building P, Third Floor
Richmond, CA 94804-6403
Fax: (510) 620-5656
CDPH 8552 (6/07)
Zip Code
Address [number, street, apartment (if applicable)] City State Zip Code Telephone number
Section 2 — Type of Lead Hazard Evaluation (Check one box only) Address [number, street, apartment (if applicable)]
Other____________
No
Deteriorated lead-based paint detected
Lead-contaminated soil found Other____________________
Yes
Don’t Know
Children living in structure?
ENTEK

APPENDIX C

STATE OF CALIFORNIA

DEPARTMENT OF PUBLIC HEALTH

LEAD-RELATED CONSTRUCTION CERTIFICATE
Disclaimer: This document alone should not be relied upon to confirm certification status. Compare the individual’s photo and name to another valid form of government issued photo identification. Verify the individual’s certification status by searching for Lead-Related Construction Professionals at www.cdph.ca.gov/programs/clppb or calling (800) 597-LEAD INDIVIDUAL: CERTIFICATE TYPE: NUMBER: EXPIRATION DATE:

Lead Inspector/Assessor LRC-00011068 4/7/2024
Lead Sampling Technician LRC-00008454 3/25/2024
Karl Suarez

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National Voluntary
Laboratory Accred itation Prog ram NV[AP'
SCOPE OF ACCREDITATION TO ISO/IEC 1702522017

ASBESTECH
11151 Sun Center Drive, Suite B
Rancho Cordova, CA 95670
Mr. Tommy Conlon
Phone: 916-481-8902 Fax: 91 6-48 l-3975
Email: [email protected]
http ://www. asbestechlab.com

ASBESTOS FIBER ANALYSIS
Bulk Asbestos Analvsis
NVLAP LAB CODE IOI442-O
Description
U.S. EPA's "Interim Transmission Electron Microscopy Analytical Methods-Mandatory and Nonmandatory-and Mandatory Section to Determine Completion of Response Actions" as found in 40 CFR, Part763, Subpart E, Appendix A.

Description
EPA -- 40 CFR Appendix E to Subpart E of Part 763, Interim Method of the Determination of Asbestos in Bulk Insulation Samples
EPA 600/R-93/l l6: Method for the Determination of Asbestos in Bulk Buildine Materials Airborne Asbestos Analvsis
Code
l8/A0l
l8/403
Code
18/A02
Effective 2 02 2 -07 -0 I t hrough 2 02 3 -06- 3 0 Page I of I MicroTest Laboratories, Inc.
3110 Gold Canal Drive
Rancho Cordova, CA 95670
6/30/2024
7/1/2022
2974

CALIFORNIA STATE

ENVIRONMENTAL LABORATORY ACCREDITATION PROGRAM

CERTIFICATE OF

ENVIRONMENTAL LABORATORY ACCREDITATION
Is hereby granted to
Scope of the certificate is limited to the
“Fields of Accreditation”
which accompany this Certificate.

Continued accredited status depends on compliance with applicable laws and regulations, proficiency testing studies, and payment of applicable fees.

This Certificate is granted in accordance with provisions of Section 100825, et seq. of the Health and Safety Code.

Certificate No.:

Expiration Date:

Effective Date:

Sacramento, California
subject to forfeiture or revocation
__________________________________________________
Christine Sotelo, Program Manager
Environmental Laboratory Accreditation Program
MicroTest Laboratories, Inc.

Rancho Cordova, CA 95670

CALIFORNIA STATE

ENVIRONMENTAL LABORATORY ACCREDITATION PROGRAM
Fields of Accreditation
Certificate Number: 2974
Phone: 9165679808
Expiration Date: 6/30/2024 3110 Gold Canal Drive
Field of Accreditation:114 - Inorganic Constituents in Hazardous Waste 114.345 002 Antimony EPA 6020 B
114.345 003 Arsenic EPA 6020 B
114.345 004 Barium EPA 6020 B
114.345 005 Beryllium EPA 6020 B
114.345 006 Cadmium EPA 6020 B
114.345 008 Chromium EPA 6020 B
114.345 009 Cobalt EPA 6020 B
114.345 010 Copper EPA 6020 B
114.345 012 Lead EPA 6020 B
114.345 016 Nickel EPA 6020 B
114.345 018 Selenium EPA 6020 B
114.345 021 Thallium EPA 6020 B
114.345 023 Zinc EPA 6020 B
114.345 024 Molybdenum EPA 6020 B
114.515 001 Lead EPA 7420
114.545 001 Mercury EPA 7471 B
Field of Accreditation:115 - Leaching/Extraction Tests and Physical Characteristics of Hazardous Waste 115.055 001 Waste Extraction Test (WET) CCR Chapter11, Article 5, Appendix II 115.085 001 Toxicity Characteristic Leaching Procedure (TCLP) EPA 1311 Field of Accreditation:121 - Bulk Asbestos Analysis of Hazardous Waste 121.010 001 Bulk Asbestos EPA 600/M4-82-020
As of 7/1/2022 , this list supersedes all previous lists for this certificate number.

Customers: Please verify the current accreditation standing with the State. Page 1 of 1 ENTEK
CONSULTING GROUP, INC. 4200 Rocklin Road, Suite 7, Rocklin, CA 95677 Phone (916) 632-6800 Fax (916) 632-6812 www.entekgroup.com

ASBESTOS LEAD MOLD INDOOR AIR QUALITY NOISE MONITORING TRAINING HEALTH AND SAFETY AUDITS

HAZARDOUS MATERIALS SURVEY

FINAL REPORT

OWNER/CLIENT
City of Sacramento
Department of Public Works Facilities &
Real Property Management
5730 24th Street, Building 4
Sacramento, CA 95822

CONTACT
Mr. Jim Roehl
Environmental Program Manager,
Brownsfields & HazMat

SURVEY ADDRESS
1124 Del Paso Road
Sacramento, California 95815

BUILDING SURVEYED
Sacramento News & Review Building
Phase 2 – Interior Renovation Project

PREPARED BY
Karl Suarez
CSST # 21-6935 and CDPH IA #11068
Entek Consulting Group, Inc.
4200 Rocklin Road, Suite 7
Rocklin, CA 95677
Entek Project #23-6713
July 3, 2023
ENTEK

TABLE OF CONTENTS
Executive Summary .....................................................................................3 Introduction..................................................................................................4 Building Description .....................................................................................4 Asbestos Inspection and Sample Collection Protocols................................. 4 Asbestos Bulk Sample Results ....................................................................5 Asbestos Regulatory Requirements............................................................. 6 Lead Inspection, Sampling, & Results.......................................................... 6 Lead Regulatory Compliance....................................................................... 7 Limitations.................................................................................................... 7 Appendices
A. Asbestos Related Documents
B. Lead Related Documents
C. Backup Documents
ENTEK
3 Hazardous Materials Survey Report – Sacramento News & Review Building – Interior Renovation Project Executive Summary
Entek Consulting Group, Inc. (Entek) is pleased to provide Mr. Jim Roehl, Environmental Program Manager for the City of Sacramento with this limited asbestos and lead survey report regarding the upcoming Interior Renovation Project at the Sacramento News & Review Building located on 1124 Del Paso Boulevard in Sacramento, California.

The purpose of the inspection was to comply with the US EPA NESHAP requirements and the Sacramento Metropolitan Air Quality Management District (SMAQMD), which has jurisdiction for this project site to determine if asbestos containing materials are present which may be impacted during the upcoming Interior Renovation Project. Anticipated work will be broken into two phases. Phase 1 will include renovation of the roof. Phase 2 will include renovation of the interior building components. For purposes of this report, this limited asbestos and lead survey is only for the Phase 2 Interior Renovation Project.

It is our understanding that the Sacramento News and Review Building was constructed in the 1940s, with major renovations to the interior of the building occurring in approximately 2016.

ENTEK
4 Hazardous Materials Survey Report – Sacramento News & Review Building – Interior Renovation Project Asbestos
On June 6, 2023, Entek conducted a limited asbestos and lead survey specific to the interior areas designated by Jim Roehl, Environmental Program Manager for the City of Sacramento.

None of the materials collected were determined to contain asbestos. Specifics pertaining to individual materials are found in later parts of this report.

Lead
Entek investigated the existing paints and coatings that may be impacted by the renovation project to determine if lead was present. All paints collected from the interior components that are expected to be impacted by the Interior Renovation Project were determined to be below the laboratory’s detectable limit of 100 parts per million (ppm) for lead.

Introduction
This report presents results of a limited asbestos and lead survey performed by Entek which included the interior building materials of the Sacramento News & Review Building located at 1124 Del Paso Boulevard in Sacramento, California. These areas were designated by Jim Roehl, Environmental Program Manager for the City of Sacramento.

The inspection was conducted on June 9, 2023, by Mr. Karl Suarez who is a Cal/OSHA Certified Site Surveillance Technician (CSST) and a California Department of Public Health Lead Inspector Assessor (I/A) and Mr. Gerald Moralez who is a California Department of Health Lead Sample Technician.

This report was prepared for Mr. Jim Roehl, Environmental Program Manager for the City of Sacramento.

Building Description
The Sacramento News & Review Building is a multistory wood framed building with a concrete slab foundation. The survey area included the interior building materials expected to be impacted by the upcoming Interior Renovation Project of the Sacramento News & Review Building. The interior finished materials consisted of various types of drop-in acoustical ceiling tiles, drywall wall systems, fiberglass reinforced paneling, and vinyl cove base. The flooring consists mainly of finished concrete, but some rooms had carpet, ceramic tile, and 2’x2’ vinyl floor tile. The plenum space consisted of both fiberglass insulated and un-insulated HVAC ducting, as well as electrical conduit.

Asbestos Inspection and Sample Collection Protocols
Entek included all specific designated interior materials that are expected to be impacted by the upcoming Interior Renovation Project in this report.

ENTEK
5 Hazardous Materials Survey Report – Sacramento News & Review Building – Interior Renovation Project Bulk samples were collected of various materials suspected to contain asbestos by utilizing a power drill and coring tube, cutting the materials with a razor knife, or use of other appropriate hand tools.

Miscellaneous materials were collected from each homogenous area in a manner sufficient to determine whether the material is or is not ACM as required in 40 CFR Part 763, Asbestos-Containing Materials in Schools; Final Rule and Notice, published October 30, 1987.

The samples of materials suspected of containing asbestos were submitted to Asbestech, a laboratory located in Rancho Cordova, California. These samples were subsequently analyzed utilizing USEPA Method 600 by polarized light microscopy (PLM) with dispersion staining. Asbestech is a NVLAP accredited program.

A total of 36 bulk samples were collected of all the materials considered to be "suspect", which had not been previously sampled, and which were observed during this investigation. Some of those samples contained multiple layers which were individually analyzed to determine their asbestos content. Analysis of all samples collected was by PLM with dispersion staining.

None of the materials collected were determined to contain asbestos. Specifics pertaining to individual materials are found in later parts of this report.

Any building materials which are considered “suspect” for containing asbestos which have not been identified in this report must be assumed to contain asbestos in amounts >1% until properly investigated and/or tested.

ENTEK
6 Hazardous Materials Survey Report – Sacramento News & Review Building – Interior Renovation Project Asbestos Regulatory Requirements
US EPA
The property included in this survey report is located in Sacramento County. Sacramento Metropolitan Air Quality Management District (SMAQMD) has been given authority for enforcement of the NESHAP regulations by means of their own rules (Rule 902 Asbestos).

Since none of the materials sampled were determined to contain asbestos, a 10-day notification to the SMAQMD is not required to be submitted prior to starting work for asbestos reasons.

Cal/OSHA
Disturbance of any ACM or ACCM could generate airborne asbestos fibers and would be regulated by Cal/OSHA. Cal/OSHA worker health and safety regulations apply during any disturbance of ACM or ACCM by a person while in the employ of another. This is true regardless of friability or quantity disturbed.

Lead Inspection, Sampling, & Results
Seven (7) bulk samples of the painted surfaces expected to be impacted by the renovation project were collected and submitted to MicroTest Laboratories, Inc. These samples were subsequently analyzed by atomic absorption spectrometry (AAS). Results of the analysis are listed in the following table:

Paints/Coatings/Materials Determined NOT TO Contain Lead (<100 ppm) Paint/Coating Color or Material Building Component
White Paint Drywall Wall System – Throughout Storage Room Red Paint Drywall Wall Systems – Throughout Building
Black Paint Drywall Wall System – Throughout Building
White Ceramic Tile Ceramic Wall Tile – Throughout Restroom Brown Ceramic Tile Ceramic Floor Tile – Throughout Restroom Red Epoxy Coating Concrete Flooring – Throughout Building ENTEK
7 Hazardous Materials Survey Report – Sacramento News & Review Building – Interior Renovation Project Paints/Coatings/Materials Determined NOT TO Contain Lead (<100 ppm) Paint/Coating Color or Material Building Component
White Paint Concrete Masonry Block Wall – Southeast Storage Room
Paints determined “NOT TO” contain lead for the purposes of this report are those samples which when analyzed did not indicate lead to be present at or above the limit of detection for the analysis method used. This limit of detection was 100 parts per million (ppm). As a result, any paints shown “NOT TO” contain lead will not require any special training or work practices related to lead when impacted.

Since no detectable amount of lead was found, CAL OSHA regulations found in 8 CCR 1532.1 Lead in Construction will not apply to this project.

Limitations
Entek inspected only the specific designated areas identified by Jim Roehl, Environmental Program Manager for the City of Sacramento to be included in the Interior Renovation Project, which did not include all areas of the building’s interior and exterior components.

As a result, the information provided in this inspection report may not be used to extend the inspection results to areas not included in this report without additional review and sampling as necessary.

Entek did not perform any destructive sampling to look into ceiling and wall cavities. As a result, it may be possible for materials to be hidden in these areas which are not included in this report. Entek also did not employ any destructive measures on floors of interior spaces or exterior areas covered with asphalt, concrete, or dirt.

Entek will be providing only this electronic copy of the report and its attachments for your use. However, if you would like a hard copy of this report please do not hesitate to ask.

Entek will be happy to mail the report upon receipt of your request.

ENTEK
8 Hazardous Materials Survey Report – Sacramento News & Review Building – Interior Renovation Project Thank you for choosing Entek for your environmental needs. Please call me at (916) 632- 6800 if you have any questions regarding this report.

Prepared by:

Karl Suarez
Assistant Project Manager
Cal/OSHA CSST #21-6935
CDPH I/A #11068
Appendices
A. Asbestos Related Documents
B. Lead Related Documents
C. Backup Documents
Reviewed by:

Blake Howes
Vice President
Cal/OSHA CAC #13-5015
CDPH I/A #3315
ENTEK

APPENDIX A

NVLAP LAB CODE 101442-0 LAB DIRECTOR: TOM CONLON ANALYST: JIM JUNGLES Client: Job:

Entek Consulting Group, Inc. 23-6713 City of Sacramento 4200 Rocklin Rd., Suite 7 Sacramento News & Review Bldg.

Rocklin, CA 95677 1124 Del Paso Blvd., Sacramento, Ca

BULK ASBESTOS ANALYSIS REPORT
LAB JOB # 70460-1 NVLAP Lab Code 101442-0
Date/Time Collected: 6/6/23 CDPH # 1153
Date Received: 6/6/23 Date Analyzed: 6/9/23
Sample No. Color/Description % Type Asbestos Other Materials ECG-23-6713-
01A White drywall , 2nd floor annex SE NONE DETECTED Gypsum corner of west room Fibrous Glass
White joint compound 1 NONE DETECTED Calcite
White joint compound 2 NONE DETECTED Calcite
01B White drywall , SW corner in NONE DETECTED Gypsum
kitchenette Fibrous Glass
White joint compound 1 NONE DETECTED Calcite
White joint compound 2 NONE DETECTED Calcite
01C White drywall , SE corner in NONE DETECTED Gypsum
NE office Fibrous Glass
White joint compound 1 NONE DETECTED Calcite
White joint compound 2 NONE DETECTED Calcite
01D White drywall , SW corner in NONE DETECTED Gypsum
Systems office Fibrous Glass
White joint compound 1 NONE DETECTED Calcite
White joint compound 2 NONE DETECTED Calcite

NVLAP LAB CODE 101442-0 LAB DIRECTOR: TOM CONLON ANALYST: JIM JUNGLES Client: Job:

Entek Consulting Group, Inc. 23-6713 City of Sacramento 4200 Rocklin Rd., Suite 7 Sacramento News & Review Bldg.

Rocklin, CA 95677 1124 Del Paso Blvd., Sacramento, Ca

BULK ASBESTOS ANALYSIS REPORT
LAB JOB # 70460-2 NVLAP Lab Code 101442-0
Date/Time Collected: 6/6/23 CDPH # 1153
Date Received: 6/6/23 Date Analyzed: 6/9/23
Sample No. Color/Description % Type Asbestos Other Materials ECG-23-6713-
01E White drywall , SE corner near NONE DETECTED Gypsum SW offices Fibrous Glass
White joint compound 1 NONE DETECTED Calcite
White joint compound 2 NONE DETECTED Calcite
01F White drywall , NW corner in west NONE DETECTED Gypsum staff area Fibrous Glass
White joint compound 1 NONE DETECTED Calcite
White joint compound 2 NONE DETECTED Calcite
01G White drywall , SW corner in center NONE DETECTED Gypsum office cluster Fibrous Glass
White joint compound 1 NONE DETECTED Calcite
White joint compound 2 NONE DETECTED Calcite
02A Brown 4” vinyl base cove , 2nd floor NONE DETECTED Calcite annex east wall within west room
Tan mastic NONE DETECTED Calcite
White joint compound NONE DETECTED Calcite

NVLAP LAB CODE 101442-0 LAB DIRECTOR: TOM CONLON ANALYST: JIM JUNGLES Client: Job:

Entek Consulting Group, Inc. 23-6713 City of Sacramento 4200 Rocklin Rd., Suite 7 Sacramento News & Review Bldg.

Rocklin, CA 95677 1124 Del Paso Blvd., Sacramento, Ca

BULK ASBESTOS ANALYSIS REPORT
LAB JOB # 70460-3 NVLAP Lab Code 101442-0
Date/Time Collected: 6/6/23 CDPH # 1153
Date Received: 6/6/23 Date Analyzed: 6/9/23
Sample No. Color/Description % Type Asbestos Other Materials ECG-23-6713-
02B Brown 4” vinyl base cove , 1st floor NONE DETECTED Calcite west wall in Sales office area
Tan mastic NONE DETECTED Calcite
White joint compound NONE DETECTED Calcite
02C Brown 4” vinyl base cove , 1st floor NONE DETECTED Calcite west wall in SW office area
Tan mastic NONE DETECTED Calcite
White joint compound NONE DETECTED Calcite
03A White orange peel texture on drywall , NONE DETECTED Calcite 2 nd floor annex east wall within west room
03B White orange peel texture on drywall , NONE DETECTED Calcite 2 nd floor annex west wall within east room
03C White orange peel texture on drywall , NONE DETECTED Calcite east wall within SE Sales office area
03D White orange peel texture on drywall , NONE DETECTED Calcite east wall in west staff area
03E White orange peel texture on drywall , NONE DETECTED Calcite north wall in SW office

NVLAP LAB CODE 101442-0 LAB DIRECTOR: TOM CONLON ANALYST: JIM JUNGLES Client: Job:

Entek Consulting Group, Inc. 23-6713 City of Sacramento 4200 Rocklin Rd., Suite 7 Sacramento News & Review Bldg.

Rocklin, CA 95677 1124 Del Paso Blvd., Sacramento, Ca

BULK ASBESTOS ANALYSIS REPORT
LAB JOB # 70460-4 NVLAP Lab Code 101442-0
Date/Time Collected: 6/6/23 CDPH # 1153
Date Received: 6/6/23 Date Analyzed: 6/9/23
Sample No. Color/Description % Type Asbestos Other Materials ECG-23-6713-
03F White orange peel texture on drywall , NONE DETECTED Calcite south wall near front lobby desk
03G White orange peel texture on drywall , NONE DETECTED Calcite west wall in Design office area
04A Brown carpet, 2nd floor annex within NONE DETECTED Calcite west room
Yellow mastic NONE DETECTED Synthetics
Clear mastic NONE DETECTED Synthetics
Gray leveler NONE DETECTED Calcite
04B Brown carpet, 2nd floor annex within NONE DETECTED Calcite east room
Yellow mastic NONE DETECTED Synthetics
Clear mastic NONE DETECTED Synthetics
Gray leveler NONE DETECTED Calcite
05A Tan vinyl sheet flooring w/ speckle NONE DETECTED Opaques pattern on stairs, stairs to 2nd floor annex
Yellow mastic NONE DETECTED Synthetics

NVLAP LAB CODE 101442-0 LAB DIRECTOR: TOM CONLON ANALYST: JIM JUNGLES Client: Job:

Entek Consulting Group, Inc. 23-6713 City of Sacramento 4200 Rocklin Rd., Suite 7 Sacramento News & Review Bldg.

Rocklin, CA 95677 1124 Del Paso Blvd., Sacramento, Ca

BULK ASBESTOS ANALYSIS REPORT
LAB JOB # 70460-5 NVLAP Lab Code 101442-0
Date/Time Collected: 6/6/23 CDPH # 1153
Date Received: 6/6/23 Date Analyzed: 6/9/23
Sample No. Color/Description % Type Asbestos Other Materials ECG-23-6713-
06A Gray window glazing putty on windows, NONE DETECTED Calcite 2 nd floor annex south windows
White putty NONE DETECTED Calcite
07A Gray 2’x2’ vinyl floor tile, computer NONE DETECTED Calcite storage room south by entrance into room
Black mastic NONE DETECTED Opaques
07B Gray 2’x2’ vinyl floor tile, computer NONE DETECTED Calcite storage room north within room
Black mastic NONE DETECTED Opaques
08A Gray/white 2’x4’ ceiling tile w/ pinhole NONE DETECTED Cellulose & fissure pattern, east within computer Pumice
storage room
08B Gray/white 2’x4’ ceiling tile w/ pinhole NONE DETECTED Cellulose & fissure pattern, west within computer Pumice
storage room
09A Gray concrete flooring, center of SE NONE DETECTED Granular Mins. storage room

NVLAP LAB CODE 101442-0 LAB DIRECTOR: TOM CONLON ANALYST: JIM JUNGLES Client: Job:

Entek Consulting Group, Inc. 23-6713 City of Sacramento 4200 Rocklin Rd., Suite 7 Sacramento News & Review Bldg.

Rocklin, CA 95677 1124 Del Paso Blvd., Sacramento, Ca

BULK ASBESTOS ANALYSIS REPORT
LAB JOB # 70460-6 NVLAP Lab Code 101442-0
Date/Time Collected: 6/6/23 CDPH # 1153
Date Received: 6/6/23 Date Analyzed: 6/9/23
Sample No. Color/Description % Type Asbestos Other Materials ECG-23-6713-
10A Red 2’x1’ concrete masonry unit block, NONE DETECTED Granular Mins. south wall in SE storage room
Gray grout NONE DETECTED Granular Mins.
11A Gray vinyl sheet flooring, south NONE DETECTED Opaques within SE men’s restroom Cellulose
Brown mastic NONE DETECTED Synthetics
11B Gray vinyl sheet flooring, south NONE DETECTED Opaques within SE women’s restroom Cellulose
12A Clear mastic behind tan fiberglass NONE DETECTED Synthetics reinforced paneling, east wall within SE
men’s restroom
12B Clear mastic behind tan fiberglass NONE DETECTED Synthetics reinforced paneling, east wall within SE
women’s restroom
13A Black sink undercoating, sink in east NONE DETECTED Tar Binder kitchenette Calcite
13B Black sink undercoating NONE DETECTED Tar Binder
Calcite

NVLAP LAB CODE 101442-0 LAB DIRECTOR: TOM CONLON ANALYST: JIM JUNGLES Client: Job:

Entek Consulting Group, Inc. 23-6713 City of Sacramento 4200 Rocklin Rd., Suite 7 Sacramento News & Review Bldg.

Rocklin, CA 95677 1124 Del Paso Blvd., Sacramento, Ca

BULK ASBESTOS ANALYSIS REPORT
LAB JOB # 70460-7 NVLAP Lab Code 101442-0
Date/Time Collected: 6/6/23 CDPH # 1153
Date Received: 6/6/23 Date Analyzed: 6/9/23
Sample No. Color/Description % Type Asbestos Other Materials ECG-23-6713-
14A Gray/white 2’x2’ drop in acoustical NONE DETECTED Cellulose ceiling tile, west within NE break room Fibrous Glass
14B Gray/white 2’x2’ drop in acoustical NONE DETECTED Cellulose ceiling tile Fibrous Glass
15A Brown 2”x2” ceramic floor tile, NONE DETECTED Granular Mins. south restroom
Gray grout NONE DETECTED Granular Mins.
16A White 4”x6” ceramic wall tile, NONE DETECTED Granular Mins. south restroom
Gray grout NONE DETECTED Granular Mins.
17A Gray seam sealant on HVAC duct work NONE DETECTED Calcite on ducting near north wall in SE
storage room
AE rr^

BULK ASBESTOS MATERIAL
ENrex Cor.rsullruc Gnoue, lNc.
4200 Rocxt-tt'r Roao, Surre 7
RocxlrN, CA 95677
(916) 632-6800 Pnone
(916) 632-6812 Fnx
ma i noffice@entekq roup. com
Analysis Reguesf
Date of Sampling: 616123
Job Number:23-6713
Client Name: City of Sacramento
Site Address: Sacramento News & Review Building
1124 Del Paso Boulevard
Sacramento, CA 95815
Lab: Asbestech
Collected by: Karl Suarez
Turnaround Time: Friday, 619123, End of Day
ANALYSIS REQUESTED: Asbestos by PLM
with Dispersion Staining
Speciaf lnstructions: Sfop analysis upon first positive result (>1%) for sample ln a series. A/so stop analysis upon first positive result (>1%) in the joint compound for sample series.

Please e-mail results at [email protected] and [email protected] as soon as available and include copv of submittal with fhose resu/ts C:\Users\Karl\Entek Consulting Group, lnc\Entekgroup - Documents\Clients\City of Sac\23-6713 Sac News & Review Bldg - AsbPb\Bulk Asb\Bulk Asb Rqst lnterior 6-6-23.docx
Deriveredby: el4W
Receivedby: '?d/ -
3J JrJ JJ rime: t z: i& arvr/@
-(n1 6,4r,^., Date: /2*"r@
SAMPLE #
ECG-23-6713-01A Drywall and Joint Compound, 2nd Floor Annex, Southeast Corner of West Room ECG-23-6713-01B Drywall and Joint Compound, Southwest Corner in Kitchenette ECG-23-6713-01C Drywall and Joint Compound, Southeast Corner in Northeast Office ECG-23-6713-01D Drywall and Joint Compound, Southwest Corner in Systems Office ECG-23-6713-01E Drywall and Joint Compound, Southeast Corner Near Southwest Offlces ECG-23-6713-01F Drywall and Joint Compound, Northwest Corner in West Staff Area ECG-23-6713-01G Drywall and Joint Compound, Southwest Corner in Center Office Cluster ECG-23-6713-024 Brown 4" Vinyl Cove Base with Tan Mastic, 2nd Floor Annex, East Wall within West Room ECG-23-6713-028 Brown 4" Vinyl Cove Base with Tan Mastic, 1sr Floor, West Wall in Sales Office Area ECG-23-6713-02C Brown 4" Vinyl Cove Base with Tan Mastic, 1st Floor, West Wall in Southwest Office Area ECG-23-6713-03A Orange Peel Texture on Drywall, 2nd Floor Annex, East Wall within West Room ECG-23-6713-038 Orange Peel Texture on Drywall, 2nd Floor Annex, West Wall within East Room ECG-23-6713-03C Orange Peel Texture on Drywall, East Wall Within Southeast Sales Office Area ECG-23-6713-03D Orange Peel Texture on Drywall, East Wall in West Staff Area ECG-23-6713-03E Orange Peel Texture on Drywall, North Wall in Southwest Office ECG-23-6713-03F Orange Peel Texture on Drywall, South Wall Near Front Lobby Desk

Page 1 of 3 ends

MATERIAL DESCRIPTION/LOCATION
AE rr
BULK ASBESTOS MATERIAL AnatysisResuesf
Erutex Cottsulrtruc GnouR, lNc.
4200 Rocrux Roeo, Sure 7
Rocxlrr.r, CA 95677
(91 6) 632-6800 PnouE
(916) 632-6812 Fnx
[email protected]
Date of Sampling: 616123
Job Number:23-6713
Client Name: City of Sacramento
Site Address: Sacramento News & Review Building
1124 Del Paso Boulevard
Sacramento, CA 95815
7"?@ *
Lab: Asbestech
Collected by: Karl Suarez
Turnaround Time: Friday, 619123, End of Day
ANALYSIS REQUESTED: Asbestos by PLM
with Dispersion Staining
Special lnstructions: Sfop analysis upon first positive result (>1%)for sample rn a serles. A/so stop analysis upon first positive result (>1%) in the joint compound for sample series.

Please e-mail results at [email protected] and [email protected] as soon as available and include copv of submittalwith those results, C:\Users\Karl\Entek Consulting Group, lnc\Entekgroup - Documents\Clients\City of SacU3-67'13 Sac News & Review Bldg - AsbPb\Bulk Asb\Bulk Asb Rqst lnterior 6-6-23.docx
Delivered by:

Received by:

Date:

Date:
-GJ*JZ) rime: tz:3t awt8l
SAMPLE # MATERIAL DESCRIPTION/LOCATION
ECG-23-67'13-03G Orange Peel Texture on Drywall, West Wall in Design Office Area ECG-23-6713-044 Brown Carpet Over Gray Vinyl Floor Tile with Yellow Mastic, 2nd Floor Annex, Within West Room
ECG-23-6713-04B Brown Carpet Over Gray Vinyl Floor Tile with Yellow Mastic, 2nd Floor Annex, Within East Room
ECG-23-6713-0sA Tan Vinyl Sheet Flooring with Speckle Pattern on Stairs with Yellow Mastic, Stairs to 2nd Floor Annex
ECG-23-6713-064 Gray Window Glazing Putty on Windows, 2nd Floor Annex, South Wihdows ECG-23-6713-074 Gray 2'x 2' Vinyl Floor Tile with Mastic, Computer Storage Room, South By Entrance into Room
ECG-23-6713-078 Gray 2'x 2' Vinyl Floor Tile with Mastic, Computer Storage Room, North Within Room ECG-23-6713-08A 2' x 4' Acoustical Ceiling Tile with Pinhole and Fissure Pattern, East Wlthin Computer Storage Room
ECG-23-6713-088 2' x 4' Acoustical Ceiling Tile with Pinhole and Fissure Pattern, West Within Computer Storage Room
ECG-23-6713-09A Concrete Flooring, Center of Southeast Storage Room ECG-23-6713-10A 2' x'l ' Concrete Masonry Unit Block with Gray Grout, South Wall in Southeast Storage Room
ECG-23-6713-11A Gray Vinyl Sheet Flooring with Mastic, South within Southeast Men's Restroom

Page 2 of 3 ends

Ag-r-3r'.u, Qfu)
AE rr^

BULK ASBESTOS MATERIAL
Erurer Consutrrruc Gnoue, lnc.
4200 Rocxlrru Rono, Surre 7
Rocxr-ur, CA 95677
(916) 632-6800 Pnorue
(916) 632-6812 Fnx
ma i noffice@entekq rou p. com
Analysis Requesf
Date of Sampling: 616123
Job Number:23-6713
Client Name: City of Sacramento
Site Address: Sacramento News & Review Building
1124 Del Paso Boulevard
Sacramento, CA 95815
Delivered by:

Received by:
?- Y(c
Lab: Asbestech
Collected by: Karl Suarez
Turnaround Time: Friday, 619123, End of Day
ANALYSIS REQUESTED: Asbestos by PLM
with Dispersion Staining
Special lnstructions: Stop analysis upon first positive result (r1%) for sample rn a series. A/so sfop analysis upon first positive result (>1%) in the joint compound for sample sedes.

Please e-mail results at [email protected] and [email protected] as soon as available and include copy of submittalwith those results.

C:\Users\Karl\Entek Consulting Group, lnc\Entekgroup - Documents\Clients\City of SacU3,6713 Sac News & Review Bldg - AsbPb\Butk Asb\Butk Asb Rqst lnterior 6-6-23.docx
_CL*L ts SlrP
tZ:Il arvr/@
ECG-23-6713-1 1B Gray Vinyl Sheet Flooring with Mastic, South within Southeast Women's Restroom ECG-23-6713-12A Clear Mastic Behind Tan Fiberglass Reinforced Paneling, East Wall within Southeast Men's Restroom
ECG-23-6713-128 Clear Mastic Behind Tan Fiberglass Reinforced Paneling, East Wall within Southeast Women's Restroom
ECG-23-6713-13A Black Sink Undercoating, Sink in East Kitchenette ECG-23-6713-14A White 2' x 2' Drop-ln Acoustical Ceiling Tile, West within Northeast Break Room ECG-23-6713-15A 2" x 2" Brown Ceramic Floor Tile with Gray Grout, South Restroom ECG-23-6713-164 4" x 6" White Ceramic Wall Tile with Gray Grout, South Restroom ECG-23-67'13-17A Gray Seam Sealant on HVAC Duct Work, On Ducting Near North Wall in Southeast Storage Room

Page 3 of 3 ends

14 7 f --'-
Time: / L-WtPx^l '<_/
4t
SAMPLE # MATERIAL DESCRIPTION/LOCATION
Cloud\
Entek Consulting Group, Inc.
4200 Rocklin Road, Suite 7
Rocklin, CA 95677
Map Not to Scale
City of Sacramento
Sacramento News & Review Building
1124 Del Paso Boulevard
Sacramento, CA 95815
Asbestos Bulk Sample Locations
Collected by Karl Suarez
On June 6, 2023
Project Number 23-6713
2nd Floor Annex
02A (-)
03A (-)
03B (-)
04A (-) 04B(-)
01A (-)
Entek Consulting Group, Inc.
4200 Rocklin Road, Suite 7
Rocklin, CA 95677
Map Not to Scale
City of Sacramento
Sacramento News & Review Building
1124 Del Paso Boulevard
Sacramento, CA 95815
Bulk Asbestos Sampling Map
Collected by Karl Suarez
On June 6, 2023
Project Number 23-6713
05A (-) 06A (-)
10A (-)
07A (-)
07B (-)
03C (-)
09A (-)
08A (-)
08B (-)
17A (-)
12A (-)
11A (-)
12B (-)
11B (-)
Sacramento News & Review Building- Interior
13A (-)
14A (-)
01D (-)
01B (-)
01C (-)
02B (-)
02C (-)
01E (-)
01F (-)
01G (-)
14B (-)
03C (-)
03D (-)
03E (-) 13B (-)
03F (-) 03G (-)
Asbestos Survey Form
(See Instructions)
777 12th Street, 3rd Floor
Sacramento, CA 95814
Office (916) 874-4800
Fax (916) 874-4899
Email:
[email protected]

1. Purpose of Survey Renovation Demolition

2. Facility Information
Project Area(s) Description
Address City # of
Structures

3. Owner Information
Name
Address City/State Zip
Contact Phone Fax Email

4. Consultant Information Survey Date(s):

Company Name Entek Consulting Group, Inc.

Name DOSH #
Address
4200 Rocklin Road, Suite 7
City/State
Rocklin, California
Zip
95677
Phone
(916) 632-6800
Fax
(916) 632-6812
Email Signature

5. Client Information (If different than owner) 9 General Contractor 9 Insurance Company 9 Architect 9 Property Manager 9 Other
Name
Address City/State Zip 95678
Contact Phone Fax Email

6. Have all of the suspect materials that will be disturbed been sampled? Yes 9No
If no, explain why:

I have read and understand the directions. The information on this form is true and accurate.

I certify that the asbestos survey conducted represents the facility as built. 6 Applicant Name (Print) Owner
Rep / Agent
Contractor
Permit may be issued on:

Phone Number
Applicant’s Signature Date
Have DOSH Consultant complete and sign below OR attach completed Asbestos Survey Form and Consultant’s report.

APPENDIX B

CLIENT INFORMATION JOB SITE INFORMATION
Date
Time
[email protected]
Units
Units
Wt % PPM
Wt % PPM
Wt % PPM
Wt % PPM
Wt % PPM
Wt % PPM
Wt % PPM
Analyst:
1 of 1
***for office use only***
Company Entek Consulting Group, Inc SAMPLE Sampler Karl Suarez and Gerald Moralez MicroTest Laboratories, Inc. | AIHA ELPAT #160934 Project ID 3110 Gold Canal Dr, Ste. A, Rancho Cordova, CA 95670 PH 916.567.9808 | FX 916.404.0302 L32602-08 www.microtestlabsinc.com | [email protected] Address 4200 Rocklin Road, Suite 7 Site Sacramento News and Review Name Ryan Metzen Tuesday, June 6, 2023 Project City of Sacramento Email [email protected] Sacramento, CA
Rocklin, CA 95677 Building
Analytical Data
EPA METHOD 7420/7000B
Client Laboratory Reporting
Phone 916.632.6800 MicroTest Laboratories Address 1124 Del Paso Blvd Job # 23-6713
Client Results
Comments
ECG-23-
6713-01Pb
L323602 White Paint on Drywall Wall System, West Wall in Southeast Storage Room
Paint <0.01% 0.01%
Sample ID Sample ID Sample Location / Description Matrix Results Limits <100
ECG-23-
6713-02Pb
L32603 Red Paint on Drywall Wall System, South Wall in
Systems Office
Paint <0.01% 0.01%
ECG-23-
6713-03Pb
L32604 Black Paint on Drywall Wall System, Southeast Corner in North East Conference Room
Paint <0.01% 0.01%
ECG-23-
6713-04Pb
L32605 4” x 6” White Ceramic Wall Tile, South Restrooms Paint <0.01% 0.01% ECG-23-
6713-05Pb
L32606 2” x 2” Brown Ceramic Floor Tile, South Restrooms Paint <0.01% 0.01% ECG-23-
6713-06Pb
L32607 Red Epoxy Coating on Concrete, Center of Southeast East Storage Room
Paint <0.01% 0.01%
ECG-23-
6713-07Pb
L32608 White Paint on Concrete Masonry Unit Block Under Stairs, South Wall in Southeast Storage Room
Paint <0.01% 0.01%
Analytical Page #
Authorized Signatory:

Kelly Favero - Lab Manager
This report applies to the standards and procedures indicated and to the specific samples analyzed. Samples have NOT been corrected for blank values. EPA 3050B Hotblock Preparaton Method
Samples Received: 7
Samples Analyzed: 7
Erich Bowman
Tuesday, June 6, 2023
Wednesday, June 7, 2023
Friday, June 9, 2023
Date Received:

Date Analyzed:

Date Reported:
<100
<100
<100
<100
<100
<100
Document # MT-FAA 1.1
Authorized by Kelly Favero
Proprietary to MicroTest Laboratories, Inc
Issue Date: 03/02/18 Rev: 5
L32602-08
Cloud\
Entek Consulting Group, Inc.
4200 Rocklin Road, Suite 7
Rocklin, CA 95677
Map Not to Scale
City of Sacramento
Sacramento News & Review Building
1124 Del Paso Boulevard
Sacramento, CA 95815
Bulk Lead Sample Locations
Collected by Karl Suarez & Gerald Moralez
On June 6, 2023
Project Number 23-6713
07Pb
04Pb 06Pb
05Pb 01Pb 02Pb
03Pb

First copy and attachments retained by inspector
Second copy and attachments retained by owner
Third copy only (no attachments) mailed or faxed to:

APPENDIX C

BACK UP DOCUMENTS
Site Map
Photo Log
Inspector Accreditations and Certifications
Laboratory Accreditations for Asbestos, Lead and NonViable Mold Analysis Entek Consulting Group, Inc.
4200 Rocklin Road, Suite 7
Rocklin, CA 95677
Map Not to Scale
Cityof Sacramento
Sacramento News & Review Building
1124 Del Paso Boulevard
Sacramento, CA 95815
Site Map
Project Number 23-6713
Photo Log
Job Number: 23-6713 Date: 6/6/23
Client: City of Sacramento
Site Address: Sacramento News & Review Building – 1124 Del Paso Boulevard, Sacramento, CA 95815
1 View of the front receptionist desk area near the
main entrance into the building
Additional view inside of the building
View of the exposed ceiling deck Additional view of the exposed ceiling deck Photo Log
Job Number: 23-6713 Date: 6/6/23
Client: City of Sacramento
Site Address: Sacramento News & Review Building – 1124 Del Paso Boulevard, Sacramento, CA 95815
2 Additional view inside of the building View of an office area inside of the building View inside of the back storage room View of the stairs leading to the second floor annex off of back storage room
Photo Log
Job Number: 23-6713 Date: 6/6/23
Client: City of Sacramento
Site Address: Sacramento News & Review Building – 1124 Del Paso Boulevard, Sacramento, CA 95815
3 View of the vinyl floor covering on the stairs to the second floor annex
Back server/computer room
Landing of the second floor annex View within the room of the second floor annex

STATE OF CALIFORNIA

DEPARTMENT OF PUBLIC HEALTH

Lead Inspector/Assessor LRC-00011068 4/7/2024
Lead Sampling Technician LRC-00008454 3/25/2024
Karl Suarez

ASBESTECH
11151 Sun Center Drive, Suite B
Rancho Cordova, CA 95670
Mr. Tommy Conlon
Phone: 916-481-8902 Fax: 91 6-48 l-3975
Email: [email protected]
http ://www. asbestechlab.com

CALIFORNIA STATE

ENVIRONMENTAL LABORATORY ACCREDITATION PROGRAM

CERTIFICATE OF

ENVIRONMENTAL LABORATORY ACCREDITATION
Is hereby granted to
Scope of the certificate is limited to the
“Fields of Accreditation”
which accompany this Certificate.

Continued accredited status depends on compliance with applicable laws and regulations, proficiency testing studies, and payment of applicable fees.

This Certificate is granted in accordance with provisions of Section 100825, et seq. of the Health and Safety Code.

Certificate No.:

Expiration Date:

Effective Date:

Rancho Cordova, CA 95670

CALIFORNIA STATE

Customers: Please verify the current accreditation standing with the State. Page 1 of 1 r
NSHL-Roofing and Remodel
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ADDENDUM #2
North-Sacramento Hagginwood Library

08.18.2025
BID DUE DATE HAS BEEN EXTENDED TO 8/26/2025 at 2:00 PM.

Questions Received via Email:

1. Q: Detail 8/S1.01 includes a concrete curb detail. Please provide direction as to where these curbs are to be installed, if any.

A. Detail 8/S1.01 is intended to be utilized for Type B partitions. These partitions are used in the Room 21 AG Restroom and Room 24 Children’s Restroom. Please see A2.01 and 6/A11.02. Note: This answer supersedes answer from Addendum #1.

2. Q: Specification 095100 2.3 A. calls for Fine Fissured with linear plank pattern (second look). Item 4 calls for LR .85 while specified tile only has .82. Item 5 calls for NRC .65 while specified tile only has .55. Please confirm we are to provide Fine Fissured secondlook even though it doesn’t meet performance requirements. Finish schedule also calls for Fine Fissured.

A. Acoustical ceiling tile should be 24” x 48” per Reflected Ceiling Plan on A9.00. The Fine Fissured model shall still be used, .82 light reflectance is acceptable.

3. Q: On A10.10, the finish schedule calls for wall panels to be tackboard. Specification 098413 Part 2 calls for Armstrong SoundSoak standard acoustical wall panel which is not tackable. Please confirm which is correct.

A. The tackboards are not acoustical wall panels and need to be tackable. Refer to Specification section 10 11 43 – Tackable Wallboard Systems is provided in this addendum response.

4. Q: Detail 24/A11.06 shows details for ceiling clouds but this detail is for a specific Ecophon product. Specified product is by CSI so this method is not an option. Please provide required mounting method from CSI’s options.

A. CSI product to be suspended similar to methods shown in 24/A11.06, incorporating the ‘Profile Cloud 008’ manufacturer installation instructions are provided in this addendum response. It is still required to provide 1 horizontal sway cable at each row of ceiling clouds continuous wall to wall per 23/A11.06. Follow other notes included in detail 24/A11.06.

5. Q: On page A10.01 - Door & Window Schedules, 1GL says to have gray tint insulating glass can you please confirm if interior glass is to be gray tinted.

A. Interior windows shall be clear tempered glazing. Please note glazing shall be safety glazing type where window is within 24” radius/distance of adjacent door edge in closed position, and less than 60” above adjacent walking surface. Contractor to

Page 2 of 10 ends

provide Shop Drawings of all doors and windows to confirm safety glazing locations prior to fabrication.

6. Q: There are two sets of mechanical plans. One is in the "remodel" set and the other is in the "roof" set. The mechanical equipment schedule is different on each set, and the drawing dates are very different. The "roof" mechanical set is dated 8/10/23 while the "remodel" mechanical set is dated 5/23/25. Also, the "roof" set shows the heat pumps as add alternate #1 on sheet M0.01, but that doesn't match up with your description of the alternates in the Bidders description. We're assuming the "remodel" set dated 5/23/25 is to be used for bidding - Please confirm.

A. All 'remodel' sheets that are duplicates of sheets included in the 'roof' set, supersede the 'roof' sheets. Heat pumps are no longer an additive alternate and will be provided as part of scope of this project, including units and installation fully operational.

7. Q: On the Finish Plan it calls for EXT- Existing Concrete to be finished, what is that product and process?
A. See detailed response in Addendum #1. A Specification Section 09 97 23 is being provided with this Addendum.

8. Q: There is a note on the Structural referencing a Post-tensioned concrete slab, is there posttensioned cables on this site? A. The existing conditions are understood to be concrete slab-on-grade with standard reinforcement. Please include in your bid GPR scanning of all concrete slabs prior to sawcut and removal. Prior to removing rebar or other reinforcing, an assessment will be made by Structural Engineer of Record (SEOR) hired by City and scope defined prior to patch-back. Care should be taken to avoid cutting rebar or damaging existing utilities under slab. Note: There is no known post-tensioned slabs on this site.

9. Q: Bid Bond takes approximately 2 weeks to receive and we are still assembling our pricing, so we will not be able to order the bid bond based on our proposal amount. How should we proceed?
A. Bid bond amount should reflect the Engineer’s Estimate on cost for construction.

10. Q: Temp Security Camera and Interior Snapshot shown in the General Conditions cost breakdown. I wanted to confirm if there were locations you had in mind both Exterior and Interior for where the City would like temporary cameras? A. Temporary cameras are to be: One (1) interior camera should be 360 view and cover the front entrance door and One (1) exterior camera should be 360 view and cover front entrance door and surrounding site. Each camera will be field-located with the selected team.

11. Q: Please confirm the use of the specified sheet vinyl (SV-1) Tarkett sheet vinyl, style: Iconik, since this is a residential product made in Europe.

Page 3 of 10 ends

A. Bid SV-1 as Tarkett Sheet Vinyl, series iQ Granit, 2 mm thick, roll. Color to be Granit Warm Grey 0296. Install with adhesive, cove up the wall and welded seams. We will re-evaluate the final selection during the Submittal process to assess product availability. Provide 10% additional attic stock. SV-2 is not utilized, Loft Storage 39 shall be SV-1 finish.

12. Q: Please confirm the style of carpet tile (CPT-1), since there’s a discrepancy; the specifications list style: TextureMap and the Finish Plan lists style: Painted Desert.

A. CPT-1 is Painted Desert G0065 series, in Warm Adobe 65409 color. Install with manufacturer-approved adhesive using 24”x24” tiles and provide 10% additional attic stock.

13. Q: Regarding Sheet S2.1 & detail C/S3.1: The Roof Plan sheet (S2.1) provides a note "Provide Replacement or Additional FRMG at missing truss TYP as occurs". The detail referenced for this condition (C/S3.1) denotes " Typical New Truss Elevation (As required at damaged trusses).

A. Framing per C/S3.1 shall be installed at all missing and damaged trusses. Final Quantity is TBD. For bidding purposes, include additional framing following detail C/S3.1 at (10) existing damaged trusses and (3) new trusses at missing locations.

14. Q: Please clarify if a NEW truss is to be installed at damaged truss location(s)? If new truss is required, please provide quantities of damaged trusses for bidding purposes.

A. No, damaged trusses that are repairable need to have additional framing installed per structural details. For bidding purposes, see quantities for new and repaired trusses related to C/S3.1 in Question 12 answer.

15. Q: Roof plan only shows one location for the missing truss. Please confirm the new truss framing requirement per detail C/S3.1 occurs at only one location? If not, please provide quantity for bidding purposes.

A. Final quantity of missing trusses needs to be verified. For bidding purposes, refer to Question 12 answer for new truss quantity at missing locations following detail C/3.1 and verify final quantity based on field conditions during construction.

16. Q: Regarding Sheet S2.1: The Note "TYP AT ALL TRUSSES UNO" located left of the elevation tag "B/S3.1" which is located near gridline C and GL1.8, please confirm if the work is to apply to all of the trusses within the building or only the trusses between GL 1 & 2? Please provide quantity for bidding purposes.

A. Scope for “trusses” only occurs between grid lines 1 and 2. For bidding purposes, we estimate (45) total trusses will be installed at completion minus the (13) quantity provided in Question 12, so elevation B/S3.1 should occur at (22) trusses.

17. Q: Structural: The Holdown or Lateral tie (HDU5, HTT4 & LTTP2) hardware installation requirements throughout the project are noted to be installed at "...(E) GROUTED CELLS, VIF".

Please confirm the existing CMU wall is to be considered fully grouted for bidding purposes.

Page 4 of 10 ends

A. The existing CMU masonry wall is not fully grouted. For bidding purposes, assume all CMU cells are empty and need to be treated accordingly with injectable mortar adhesive at each anchor embedment. If grouted cells are discovered during construction, standard anchoring can occur.

18. Q: Regarding the shoring requirements notes on the Roof replacement permit set on Sheet S2.1 for the replacement of the 2x10 existing wood member, would you please provide the loads the shoring is the support? Additionally, please confirm the shoring location is to span to the adjacent roof members as shown below.

A. Roof dead load is 13psf, roof live load is 20psf, and mechanical unit weights are per contract documents. Per B/S0.1 note 7, shoring is the GC’s responsibility. Include costs for shoring to protect existing framing during structural retrofit at this location mentioned and all other locations.

19. Q: Keynote D.01 on D2.01 states to "remove casework, casework to be salvaged by owner." The removal of the casework will likely be unsalvagable. Please clarify the intent to salvage the casework.

A. Casework that is set for demolition does not need to be salvaged. Plan to remove casework from the site, unless it is planned to be protected on-site or reused elsewhere.

20. Q: It states that it is construction type VB which does not require any fireproofing. The spec calls for a cementitious fireproofing for steel. Is there any fire proofing required? A. No fireproofing is required at exterior walls. There may be fireproofing required at the interior wall designated for fire protection.

21. Q: We are having trouble finding Awnex Union installers. Are we able to use non-Awnex Awnings? Currently, the plans and specs have Awnex listed as the “Basis of Design”. And/or can we use non-union installers for the Awnigs? Please advise.

A. Bid per plans and as detailed in Add #1. Any details with Union installer concerns will be resolved either with a Substitution for a comparable product or by getting an exemption through local union halls.

22. Q: The Loft area (Storage 39) does not appear on the Finish Floor Plan (A10.10) or the Finish Schedule. However, Keynote 0915 on the Floor Plan (A2.01) calls for the “LOFT TO RECEIVE NEW SHEET VINYL, SV¬2, SEE FINISH SCHEDULE”. Please advise if the loft should get any new finishes or not.

A. Remove all existing flooring down to plywood sheathing in the loft and stair. Yes, Sheet Vinyl SV-1 should be used in this area. See response on Sheet Vinyl clarification elsewhere on this Addendum. Existing sub-floor in the loft area (storage 39) is plywood, provide SV-1 is Tarkett Sheet Vinyl, series iQ Granit, 2 mm thick, roll. Color to be Granit Warm Grey 0296. Install with cove up the wall and welded seams. Provide 10% additional attic stock. SV-2 is not utilized.

Page 5 of 10 ends

23. Q: RFI 37 from “Ad 02 08.07.2025” references the grinding, patching, and sealing process the existing concrete labeled, “EXT, EXISTING CONCRETE FLOOR TO RECEIVE TREATMENT” is to receive. The response never gives specific products and it states “A Specification section and additional details including a specified product will be issued with an upcoming Addendum.” Please confirm this is still coming as bids are due soon.

A. Specification 09 97 23 is provided for concrete sealer as part of this Addendum.

24. Q: Please confirm the Awnings will be a standard power-coat finish and NOT a custom powercoat finish NOR a standard or custom Kynar finish. Please note custom power-coat finishes and standard or custom Kynar finishes add longer lead times and increase the cost greatly (especially Kynar).

A. A standard powder-coat finish will be selected. Selected Contractor to provide color wheel with available colors for final selection during the Submittal process.

25. Q: Please confirm Item 50 Built-In Furniture (bookshelves, Front Counter, Etc.) from the bid form is NOT in our scope of work (therefore it will be $0). Per Sheet A10.10 Furniture Schedule it has all items “BY OTHERS; NOT IN THIS SCOPE OF WORK”. If not please advise on what exactly is included in item 50 that is within our scope of work.

A. All built-in furniture is CFCI including millwork, bookshelves, front counter and all other built-in furniture on Plan Sheet F3 and F4 details is CFCI. Refer to the Furniture Plans and provide a bid for all scope as outlined and selected team shall provide Shop Drawings to confirm scope. Ross McDonald is the preferred Library vendor for built-in library stacks as noted on the plans. Any unmarked mobile furniture including modular furniture, chairs, etc. is by Others.

26. Q: Joint detail at new concrete landings and new asphalt (Ref. 5/A11.01). - Please provide the joint detail for the interface between new concrete landings and new asphalt at building entrances.

A. For interface of landing and new asphalt see detail provided on this addendum. For transition of landing with detectable domes and asphalt paving refer to 7/C3.0.

27. Q: Joint detail at new concrete paving in parking and new asphalt (Ref. 5/A11.01). - Please provide the joint detail for the interface between new concrete paving and new asphalt at parking areas.

A. Joint detail for interface of new asphalt with new asphalt paving attached. Install with Sand Seal over all seams to blend old asphalt to new.

28. Q: Fire-lane curb – location of curb detail and connection between new fire-lane curb and existing curb (Refs. G0.10 and 4/A11.01). - Please indicate the sheet(s) and location of the firelane curb detail, and provide the connection detail between the new fire-lane curb and the existing curb.

A. Refer to attached sheet G0.10 identifying fire lane curbs to be painted. The existing fire lane is identified in site plan G0.10, also to hatch pattern in Access Site Plan Legend. Connecting detail for new concrete curbs to existing concrete curb to be done

Page 6 of 10 ends

with 1/2" smooth dowels in direction of the curb, 12' long with 3" minimum embed into curbs, grease half the length, upper and lower dowel as applicable.

29. Q: Per the Tarkett Rep. He stated that the specified SV-1 Tarkett Iconik-Catera Sheet Color Middle Gray and SV-2 Tarkett Fresh Start Color Light Grey are part of Tarkett's European branch.

We would not be able to order these materials here is the US. Please verify that this is the correct sheet vinyl styles and colors for this project. If not, please provide the correct materials.

A. See question and answer above on this topic.

30. Q: Please specify the location of the Sanitary Sewer Point of Connection.

A. The sanitary sewer point of connection shall be connected to existing piping as indicated on Enlarged Plumbing Floor Plans 2 and 3 on Sheet P2.01. Pothole at existing concrete slab to field-locate main sewer connection point on-site. Any saw-cutting to locate existing sewer is by Contractor.

31. Q: Per Insulation installation spec 220389 3.3. Please confirm that all exposed ductwork is not insulated.

A. Correct, all exposed ductwork does not require insulation. Note: Rigid insulation is added to the roof and the existing insulation is to be reinstalled and faced.

32. Q: The plans call for a Bobrick B-353 sanitary napkin disposal, which is recessed, but the drawings and keynote indicate it should be wall-mounted. Could you confirm if the correct model is Bobrick 270? The recessed model would not match with partitions.

A. Provide Bobrick 270, wall mounted fixture. These shall be installed at each adult AllGender Restroom and at each stall within the Women’s Restroom.

33. Q: Please confirm the location of the tackboards?
A. Tackboard locations can be found in interior elevations on A6.20 and A6.30.

34. Q: Are the LIBRARY letters that are on the monument sign going to be recessed concrete or are they aluminum letters?
A. Letters to be depressed into the concrete of the monument sign. Letters should be 12” high and depressed ½” deep. See 8/A11.01.

35. Q: Wireless access points appear to be furnished by the Owner. Please provide make/model? A. Correct, these are to be provided and installed by Library, OFCI. See attachment for WiFi data locations, all Wireless Access Points (WAPs).

36. Q: Will the contractor need to provide a license for the wireless access points? If so, what make/model?
A. Library will provide license for each WAP. Quantity and locations outlined on the plans.

37. Q: Camera's are to be furnished by the Owner. Please provide make/model?

Page 7 of 10 ends

A. All CCTV cameras and network equipment are to be Contractor Furnished, Contractor Installed (CFCI), including wiring, mounting brackets, etc. For 360 cameras, bid: AXIS P4705-PLVE Panoramic Camera. For all 180 degree cameras, bid for AXIS P3818-PVE Panoramic Camera. Include ceiling-mount brackets and wall-mounted brackets and all cabling for power-over-ethernet cameras. Bid to include switches for cameras: Provide AXIS-approved switches, quantity based on number of cameras and tied into existing network system. Include a BCD BCD-228X-PVS-416S Network Video Recorder (NVR) and an 1.6TB SSD Accelerator Card BCD-SA-BVA-1.6T for NVR. Final equipment selection to be confirmed during the Submittal process.

38. Q: Whom will be required to provide network equipment? If it is contractor furnished, what make/model?
A. All network equipment that is new needs to be provided by Library and installed by Contractor, OFCI. For WiFi Access points, CFCI main server/switch to OFCI serve these units. All existing servers/switches to remain, DO NOT power down the switches during construction, temporary power will need to be provided to the building to keep these servers online throughout construction.

39. Q: The plan is calling for a 4-port faceplate for data locations (T0.01, Technology Legend). Is it the intention to have (1) cable per triangle (without a number) with a four-port faceplate? A. As explained in Addendum #1, typical data drops are to include (2) cables and (2) port faceplates. In some instances, (4) port faceplates may be required (i.e. at Computer Lab or other high-use areas). It is the intent of the 4-port faceplates to install a single cable in each terminal of the 4-port faceplate locations (4 total) and labeled with each server name and port number.

40. Q: I see references to projectors which are on the Architectural drawings, are the projectors OFCI? I see on page T0.01 it is calling for a 1” conduit but no other info.

A. Projector to be CFCI, Ultra Short Throw Projector, Model No. NP-UM361X manufactured by NEC, per Spec Section 11 90 00 Section 2. Substitutions only accepted during Submittal process with proper documentation. All wiring, mounting brackets and installation by Contractor.

41. Q: I also see references to speakers are they OFCI? Need more details. I see on page T0.01 it is calling for a 1” conduit but no other info.

A. Speakers shall be CFCI, Lowell RPAK-810-72 speakers or equal, all wiring, mounting brackets and installation by contractor. Substitutions only accepted during Submittal process with proper documentation.

42. Q: The locations marked for Card Readers at interior and exterior doors are clear, but what will be installed there?
A. Card Readers are OFCI. Card readers panel shall be STAR Ultra G2 SE w/enclosure, with Power Supply, I8 Eight-Input Reader Bus Module, Access Control Power Controller w/ Charger, 12V 7AH Rechargeable SLA Battery with F1 Terminal. Include

Page 8 of 10 ends

Signo 40 Wall Mounted Card Readers at all wall-mounted card readers and Signo 20 Mullion Mounted Card Reader with quantities per plan. Each Card Reader location shall include a Request to Exit Sensor, Mushroom Push Button (where occurs), Intrusion IP Control Panel (qty. based on card readers), Universal enclosure, Transformer Plug In, Enclosure lock and key set, Universal Dual Path Communicator, Touch Screen Keypad (where occurs). Card readers panel to meet Library standards.

All wiring and installation by contractor. Provide a dedicated circuit to each Card Reader panel and other equipment needs. Provide Submittal and Shop Drawings for confirmation of final equipment needs.

43. Q: The locations marked for Alarm System are shown on plans, but what will be installed? A. Alarm System is by Others, OFOI. Include power to an Intrusion IP Control Panel, Transformer Plug- In and UPS System, Universal Dual Path Communicator, Touch Screen Keypad, Intrusion Power Controller w/ Charger, Emergency Station Button, Motion Sensor, etc. All wiring and infrastructure to these units is by contractor.

Provide a dedicated circuit to each Alarm panel and coordination for power to each piece of equipment as outlined on the plans.

44. Q: The plans call for protection of existing batt insulation, do we need to include reinstallation? A. Yes, include reinstallation of any insulation that falls or needs to be removed as part of the construction process. Bid to include careful removal, set aside and reinstallation with facing as outlined in the plans.

45. Q: If exposed CMU or concrete wall is damaged on the interior, should we bid to repair? A. Yes, all walls need to be patched for any removed anchors within the interior face of the walls. Patch with concrete Sikaflex or similar and match surrounding texture as closely as possible.

46. Please provide materials for decomposed granite as outlined in planting keynotes 1-05 on sheets L1.2 and L1.3.

A. Bid ¼” minus D.G. in standard color (i.e. Desert Brown), firmly placed in planter boxes and compacted at walkways.

47. Please specify the size of lateral lines shown on sheets L2.1 and L2.2.

A. Bid per plan. ¾” minimum size to each tree or planter area, and larger if required due to run-length. Provide Shop Drawings to confirm sizes and include in bid investigation of existing lateral lines, repair and check for leaks.

48. Please provide details for the irrigation controller and confirm if the irrigation system shall be conventional or two-wire.

A. Bid conventional system, provide Shop Drawings to confirm intent of Irrigation design.

49. Please confirm if there are existing wires available for all proposed valves connected to the existing mainline.

Page 9 of 10 ends

A. There are existing wires to all existing valves. Bid to provide new wiring to all new valve locations. Use existing sleeves and re-pull wiring and land at controller and each valve.

50. Please confirm if mulch is limited to the mulch symbol and callouts at shrubs planter on sheets L1.2 and L1.3.

A. Mulch is to be at each landscape planter area, unless noted to receive D.G.

51. Please provide the geotechnical report.

A. There is no Geotechnical Report to provide at this time. We will discuss context for why this would be needed in a landscape setting and provide Geotech Report to the selected Contractor.

52. Please clarify the scope of bid item 41- Irrigation, Planting, O&M.

A. Bid per plans on this line-item. Provide testing and startup of Irrigation Controller and run all zones.

NOTE: Hazardous Materials Clarifications for soils at the site are as follows:
• For Hazardous Materials information at this site, refer to the attached Case Closure Summary from the County in 2009 (attached). Also attached is a 2021 Indoor Air Sampling (IAS) report that documents no issues were found with the current building configuration with the recommendation that if the building is modified, additional air testing should occur. City will be paying for additional IAS testing.
• There is potential for low levels of PCE and other hazardous compounds in the soils beneath the concrete slab, underneath the parking lot and throughout the site. Any trenching, sawcut, demolition, etc. in the soil requires contractor to provide a minimum of Level D PPE to all workers and subcontractors when working in or handling the soil to minimize exposure. • City will be hiring an environmental consultant to take air samples from inside the building to reconfirm there are no hazardous levels of PCE within the building. Contractor shall provide access to and coordinate with City consultants for appropriate testing after HVAC system is installed and operational.
• Any soils slated for off-haul from the site must be stored (either in containers or tarp top and bottom) and tested for hazardous materials. Soil removed for trenching can be used for backfill of trenches. All soil testing is by Contractor, with results provided to City. Any soils slated for off-haul and found to contain hazardous materials must be hauled to an appropriate facility and manifested to confirm it is disposed of properly. Include in your bid cost to test soil, haul a single 10 cubic yard load of soil away from the site and replacement with 10 cubic yards of clean fill as an allowance. Final pricing for off-haul will be determined based on soil testing results.
• All plumbing, electrical, or other utility penetrations through the concrete slab must be sealed with silicone sealer or approved. Any new floor-mounted toilets require new wax rings and

Page 10 of 10 ends

sealer around all pipes. At all floor drains, trap primers are required meaning water supply and power must be provided.
3043 Gold Canal Drive, #100
Rancho Cordova, California 95670
PH 916.637.8048
www.geosyntec.com
21 December 2021
Kirk Thompson
Environmental Program Manager
Facilities and Real Property Management, City of Sacramento 5730 24th Street, Building 4
Sacramento, California 95822
Subject: Phase II Vapor Intrusion Investigation Report
1124-1132 Del Paso Boulevard
Sacramento, California
Dear Mr. Thompson,
Geosyntec Consultants, Inc. (Geosyntec) has prepared this Phase II Vapor Intrusion (VI) Investigation Report to summarize the indoor air and sub-slab sampling investigation for the approximately 1.1-acre property located at 1124-1132 Del Paso Boulevard in Sacramento, California (the Site, Figure 1). In the Phase I Environmental Site Assessment (ESA) prepared by Geosyntec dated 26 July 2021, an unknown upgradient volatile organic compound (VOC) source, primarily tetrachloroethene (PCE) was identified, that had impacted a property owned by the Sacramento Regional Transit (RT), located adjacent to the southwest and hydraulically upgradient of the Site. Total petroleum hydrocarbons (TPH) and benzene, toluene, ethyl benzene and xylenes (BTEX) were also reported in groundwater samples on the RT property, below regional screening levels and California Maximum Contaminant Limits (MCLs). The source of this contamination has not yet been identified. The finding of elevated concentrations of VOCs reported in groundwater was considered a recognized environmental condition (REC) for the Site. 1 VOCs may
be present beneath the Site due to releases from upgradient sources. The objective of this Phase II VI investigation was to assess the potential for VI for the building at the Site. To assess the potential for VI, indoor and outdoor ambient air samples were collected and sub-slab probes were installed and sampled at the Site. Additionally, cross-slab differential pressure monitoring was conducted. The following sections summarize the field activities and results of the VI investigation.
1 Geosyntec, 2021. Phase I Environmental Site Assessment, 1124-1132 Del Paso Boulevard Sacramento, California.

July 2021.

Phase II Vapor Intrusion Investigation Results
21 December 2021

Page 2 ends

1. INDOOR AND OUTDOOR AIR SAMPLING
Six time-integrated indoor air samples, including five primary and one duplicate sample, were collected in individually-certified, 6-liter Summa canisters over an 8-hour period at the Site on August 12, 2021. The August 2021 indoor air samples were collected during heating, ventilation, and air-conditioning (HVAC)-on conditions. Three additional 8-hour time integrated ambient air samples were collected outside the building to the north, northeast and west (Figure 2). Six additional time-integrated indoor air samples were collected at the Site during HVAC-off conditions on November 13, 2021.

The sample canisters were submitted to Eurofins Air Toxics (a National Environmental Laboratory Accreditation Program [NELAP] -certified laboratory) in Folsom, California under chain-of-custody and analyzed for VOCs using United States Environmental Protection Agency (USEPA) Method TO-15 Selected Ion Monitoring (SIM). The Eurofins Air Toxics laboratory reports are included in Attachment 1.

2. SUB-SLAB PROBE INSTALLATION AND SAMPLING
Each sub-slab probe was constructed using an assembled Vapor Pin® consisting of a stainlesssteel probe, silicone sleeve as a surface seal, and a filter to prevent particulates from the sub-slab from entering the sampling equipment. Five sub-slab sampling probes (VP-1 through VP-5) were installed at the Site on August 12, 2021 and were collocated with the indoor air sample locations.

A location map of sub-slab probes is provided as Figure 2. Sub-slab probes were installed after all indoor air sampling activities had concluded to prevent possible leakage from the sub-slab floor penetrations to indoor air during indoor air sampling.

Sub-slab probe installation was completed by field personnel using a roto-hammer drill to set the Vapor Pin® and protective cap through the Site’s concrete slab. This process included drilling a ⅝-inch diameter hole through the approximately 5-inch thick concrete slab. Vapor Pins® with silicone sleeves were installed as described in the manufacturer standard operating procedure (Attachment 2).

2.1 Sub-Slab Vapor Probe Sampling Procedures
Soil vapor sampling from the newly installed sub-slab probes was conducted on August 13, 2021 during HVAC-on conditions. A helium shroud was used during the collection ofsoil vapor samples at each sub-slab probe. The sampling procedures for collecting soil vapor samples from the sub-slab probes using a helium shroud are described below.

Phase II Vapor Intrusion Investigation Results
21 December 2021

Page 3 ends

2.2 Purging and Leak Testing
Prior to sample collection at sub-slab probes VP-1 through VP-5, above ground sampling equipment was tested to ensure ambient air was not entrained into the sample. A “shut-in” test was completed once the above ground sampling equipment was assembled at each location. A vacuum of 100 inches of water was applied to the assembled aboveground sampling equipment.

Vacuum was monitored for approximately one minute. If the vacuum dissipated during the shut-in test, all aboveground fittings were adjusted in the field, and the test repeated until the sampling equipment held a vacuum for the required time period. The shut-in test at each location was successful prior to sampling.

During the purging process and prior to sample collection, a leak test was performed at each sample location. A shroud filled with approximately 10 to 30 percent helium was placed over the sub-slab probe and all aboveground sampling equipment. The concentration of helium in the shroud was measured using a hand-held field helium detector and recorded. As each sub-slab probe was purged, samples were collected in a Tedlar® bag using a lung box, and the concentration of helium in the Tedlar® bag was measured with a field helium detector. If the concentration of helium was greater than 0.5 percent (or greater than 5 percent of the minimum concentration in the shroud) then all aboveground fittings were adjusted in the field, and a new leak test performed. No leaks were detected in the field prior to sampling at each location.

The purge process consisted of removing a minimum of three volumes of sub-slab soil vapor (approximately 50-75 milliliters [mL] per purge process) from sample tubing and probes prior to sampling to avoid sampling stagnant or ambient air. One purge volume is equivalent to the volume inside the Vapor Pin® added to the volume inside the sample tubing from the probe to the sampling equipment. The total volume of purged sub-slab soil vapor at each location was recorded in the field. Sub-slab soil vapor was purged from each probe using a flow rate between 100 and 200 milliliters per minute (mL/min) to prevent ambient air intrusion and to limit potential VOC stripping that may be adsorbed to sub-slab soil.

2.3 Sub-Slab Sample Collection
Vacuum was maintained at less than 100 inches of water (approximately 7 inches of mercury) during sampling at each probe. Vacuum was measured using an in-line gauge during purging and sampling. The shroud was maintained with approximately 10 to 30 percent helium during sampling at each probe. Each sub-slab soil vapor sample was collected in an individually-certified one-liter Summa™ canister fitted with a 200 mL/min flow controller. After samples were collected, Phase II Vapor Intrusion Investigation Results
21 December 2021

Page 4 ends

Summa™ canisters were closed and secured pending shipment to the analytical laboratory under chain-of-custody procedures. The sub-slab probes were additionally removed and backfilled with hydraulic cement.

A quality control (QC) sample (i.e., field duplicate) was collected along with the five primary sub-slab soil vapor samples. All samples were submitted to Eurofins Air Toxics and analyzed for VOCs using USEPA Method TO-15. For quality assurance purposes, samples were analyzed for helium using ASTM D-1946 to assess for potential ambient air leaks in the sampling equipment.

The Eurofins Air Toxics laboratory reports are included in Attachment 1.

3. CROSS-SLAB PRESSURE MONITORING
Continuous cross-slab differential pressure measurements (i.e. the pressure differential between the sub-slab of the building and ambient indoor air) were collected during HVAC-off conditions to provide an additional line of evidence to complement the sampling program. A TEC DG-1000 anemometer was connected to a temporary sub-slab probe, installed near the center of the building, to measure and record the cross-slab differential pressure. Cross-slab differential pressure measurements were collected every 60 seconds from November 10 to November 13, 2021. The vapor probe was destroyed after the monitoring was completed. Pressure data is presented on Figure 4. The differential pressure measurements demonstrate that the building is underpressurized during HVAC-off conditions.

4. RESULTS
The analytical results from the indoor air and sub-slab samples are presented in Table 1 and on Figures 2 (HVAC-on) and Figure 3 (HVAC-off). A memorandum validating the analytical results is provided in Attachment 1. PCE was not reported in any indoor air samples during either HVAC condition. Other VOCs that were reported in indoor air samples under both HVAC conditions were carbon tetrachloride, freon 12, and BTEX at concentrations below commercial screening levels.

Concentrations of these compounds in HVAC-on and HVAC-off conditions were generally similar. Although concentrations of BTEX in indoor air samples collected in HVAC-off conditions tended to be higher. VOCs reported in indoor air samples, including BTEX, carbon tetrachloride and freon 12, were also reported in outdoor air samples at similar concentrations, indicating that these concentrations are representative of background/ambient conditions.

PCE was reported in four of the five primary sub-slab soil vapor samples, VP-2 through VP-5, at concentrations ranging from 8.2 micrograms per cubic meter (µg/m3) to 300 µg/m3. Three of the four sub-slab soil vapor samples, and additionally the duplicate sample collected at VP-5, had Phase II Vapor Intrusion Investigation Results
21 December 2021

Page 5 ends

reported PCE concentrations exceeding the commercial screening level of 67 µg/m3. 2 Other VOCs
reported in sub-slab samples included acetone, chloroform, ethanol, 2-propanol and 2,2,4-trimethlpentane at concentrations below screening levels.

Sub-slab samples were analyzed for helium, the tracer gas, to inform on whether a leak in the sampling equipment occurred during sample collection. Helium was detected in two primary sub-slab samples, VP-2 and VP-5, at 0.41% and 2.3%, respectively and in the duplicate sample at

3.9%. As the helium concentrations at VP-5 were more than 5% the minimum helium concentration in the shroud at the time of sampling (20%), this indicates a leak in the sampling train may have occurred at this location which could indicate the results from VP-5 are biased low.

5. CLOSING
Concentrations of PCE in sub-slab samples were above default screening levels for commercial properties; however, PCE was not detected in indoor air samples during HVAC-on or HVAC-off conditions. The HVAC-off results indicate that VI is not occurring under conservative conditions for the building. Further, the results from the cross-slab differential pressure with the HVAC-off analytical results indicate the building-specific attenuation factor is lower (more protective) than the default attenuation factor used to calculate the sub-slab screening levels. Based on the results of this VI assessment, no additional work is proposed at this time to further assess the REC.

However, if conditions change (e.g., changes to the building construction or increased subsurface PCE concentrations) additional sampling may be warranted to assess potential VI under the new conditions. Please contact the undersigned if you have any questions regarding this report.

Sincerely,
Michael van den Enden, PG Laura Foot
Senior Geologist Project Scientist
2 DTSC, 2020. HHRA Note 3 Modified Screening Levels for Ambient Air Analytes for Commercial/Industrial Air.

June 2020. An attenuation factor of 0.03 was applied to calculate sub-slab screening levels.

Phase II Vapor Intrusion Investigation Results
21 December 2021

Page 6 ends

Enclosures:

Figure 1: Site Location Map
Figure 2: Tetrachloroethene (PCE) Analytical Results – HVAC-on Figure 3: Tetrachloroethene (PCE) Analytical Results – HVAC-off Figure 4: Cross-Slab Pressure Differential
Table 1: Analytical Results
Attachment 1: Eurofins Air Toxics Laboratory Reports
Attachment 2: Vapor Pin® Standard Operating Procedures

FIGURES
Sources: Esri, HERE, DeLorme, USGS, Intermap, INCREMENT P, NRCan, Esri Japan, METI, Esri China (Hong Kong), Esri Korea, Esri (Thailand), MapmyIndia, NGCC, © OpenStreetMap contributors, and the GIS User Community
P:\GIS\SAC299_SacDelPaso\Project\Fig01_SiteLocation.mxd 7/9/2021 9:43:07 AM (Author: NDailey) ³
Site Location
Site Location Map
Phase II Environmental Site Assessment
1124-1132 Del Paso Boulevard
Sacramento, California
Legend

0.75 0.375 0 0.75 Miles
Figure
1 Project No.: SAC299 August 2021
Site Location
Map Sources Esri, DeLorme, NAVTEQ, USGS,
Intermap, iPC, NRCAN, Esri Japan, METI,
Esri China (Hong Kong), Esri (Thailand),
TomTom, 2012
!
!
*#
*#
*#
*# *#
!
!A
(
(
(
E
E
E
E E
Office Space
Storage
Bathrooms
Lunch Room
Trash Enclosure
Transformer
RT Site
Residential
Former Noble Auto Sales
Vacant Office Space
Vacant Warehouse
Cafe
Del Paso Blvd
Southgate Rd
Baxter Ave
Bathrooms
OA-02 (<0.21 µg/m3)
OA-01 (<0.20 µg/m3)
VP-01 (<6.7 µg/m3)
IA-01 (<0.19 µg/m3)
VP-02 (8.2 µg/m3)
IA-02 (<0.20 µg/m3)
VP-03 (110 µg/m3)
IA-03 (<0.19 µg/m3)
VP-04 (300 µg/m3)
IA-04 (<0.22 µg/m3)
VP-05 (76 µg/m3)
IA-05 (<0.20 µg/m3)
OA-03 (<0.20 µg/m3)
Tetrachloroethene (PCE) Results - HVAC-on
Phase II Environmental Site Assessment
1124-1132 Del Paso Boulevard
Sacramento, California
Figure
2 \\sacramento-01\data\GIS\SAC299_SacDelPaso\Project\202108_PhaseIIESA\Fig02_PCEResults.mxd 12/14/2021 11:03:14 AM (Author: NDailey) Project No.: SAC299
90 45 0 90 Feet
³
December 2021
Service Layer Credits: Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS,
AeroGRID, IGN, and the GIS User Community
Legend
A! Approximate Location of Former
Monitoring Well
E Indoor Air Sample - HVAC-on
Conditions
!( Outdoor Air Sample Location
*# Vapor Probe Sample Location
Site feature
Site boundary
Notes
= Sample ID (PCE result)
HVAC-on samples collected from 12 to 13
August 2021.
< = Result is less than the method detection
limit shown
PCE = Tetrachloroethene
µg/m3
= micrograms per cubic meter
OA-01 (<0.20 µg/m3)
!
!
*#
*#
*#
*# *#
!
!A
(
(
(
E
E
E
E E
Office Space
Storage
Bathrooms
Lunch Room
Trash Enclosure
Transformer
RT Site
Residential
Former Noble Auto Sales
Vacant Office Space
Vacant Warehouse
Cafe
Del Paso Blvd
Southgate Rd
Baxter Ave
Bathrooms
OA-02
OA-01
VP-01
IA-01 (<0.20 µg/m3)
VP-02
IA-02 (<0.20 µg/m3)
VP-03
IA-03 (<0.19 µg/m3)
VP-04
IA-04 (<0.20 µg/m3)
VP-05
IA-05 (<0.19 µg/m3)
OA-03
Tetrachloroethene (PCE) Results - HVAC-off
Phase II Environmental Site Assessment
1124-1132 Del Paso Boulevard
Sacramento, California
Figure
3 \\sacramento-01\data\GIS\SAC299_SacDelPaso\Project\202108_PhaseIIESA\Fig03_PCEResults-HVACoff.mxd 12/14/2021 11:05:29 AM (Author: NDailey) Project No.: SAC299
90 45 0 90 Feet
³
December 2021
Service Layer Credits: Source: Esri, DigitalGlobe, GeoEye, Earthstar Geographics, CNES/Airbus DS, USDA, USGS,
AeroGRID, IGN, and the GIS User Community
Legend
A! Approximate Location of Former
Monitoring Well
E Indoor Air Sample - HVAC-off
Conditions
!( Outdoor Air Sample Location
*# Vapor Probe Sample Location
Site feature
Site boundary
Notes
= Sample ID (PCE result)
HVAC-off samples collected on 13 November
2021.
< = Result is less than the method detection
limit shown
PCE = Tetrachloroethene
µg/m3
= micrograms per cubic meter
IA-04 (<0.20 µg/m3)
SAC299 December 2021
Cross-Slab Pressure Differential
1124-1132 Del Paso Boulevard
Sacramento, California
Figure
Note: Cross-slab pressure differences are between sub-slab and building interior (ambient air) pressures. 4 ‐1.00

0.001.00
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1 10:59
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Cross‐Slab Pressure Differential (Pa)
Date and Time
Building Interior Under‐Pressurized
Cross‐Slab Pressure DifferentialOne‐hour averaged Cross‐Slab Pressure Building Interior Over‐Pressurized
TABLE
TABLE 1

ANALYTICAL RESULTS
Phase II Vapor Intrusion Investigation Report
1124-1132 Del Paso Boulevard, Sacramento, California
Sample
Type
Sample
Location Duplicate HVAC Conditions Sample Date ACETONE BENZENE CHLOROFORM CARBON TETRACHLORIDE ETHANOL ETHYLBENZENE FREON 12 TETRACHLOROETHENE 2-PROPANOL CARBON DISULFIDE 2,2,4-TRIMETHYLPENTANE M,P-XYLENES O-XYLENE TOLUENE OTHER VOCS 32,000 13 18 180 -- 4.9 -- 2 -- 3,100 180 440 440 1,300 -- 1,066,667 433 5,300 6,000 -- 163 -- 67 -- 103,333 6,000 14,667 14,667 43,333 -- VP-1 ON 8/13/2021 42 <3.2 <4.8 <6.3 49 <4.3 <4.9 <6.7 84 <12 <4.6 <4.3 <4.3 <3.7 ND VP-2 ON 8/13/2021 59 <3.2 <4.9 <6.3 28 <4.3 <4.9 8.2 44 12 <4.7 <4.3 <4.3 <3.7 ND VP-3 ON 8/13/2021 26 <3.3 5.3 <6.4 34 <4.3 <4.9 110 260 <13 160 <4.3 <4.3 <3.8 ND VP-4 ON 8/13/2021 34 <3.4 <4.8 <6.5 41 <4.3 <4.9 300 84 <12 <4.6 <4.3 <4.3 <3.9 ND ON 8/13/2021 46 <3.5 <4.8 <6.6 30 <4.3 <4.9 76 41 <12 <4.6 <4.3 <4.3 <3.10 ND x ON 8/13/2021 55 <3.6 <4.8 <6.7 36 <4.3 <4.9 69 55 <12 <4.6 <4.3 <4.3 <3.11 ND ON 8/12/2021 NA 0.37 <0.14 0.44 NA 0.24 2.2 <0.19 NA NA NA 0.83 0.30 1.1 ND OFF 11/13/2021 NA 0.85 <0.14 0.42 NA 0.43 0.1 <0.20 NA NA NA 1.20 0.39 1.3 ND ON 8/12/2021 NA 0.35 <0.14 0.46 NA 0.20 2.3 <0.20 NA NA NA 0.66 0.24 0.98 ND OFF 11/13/2021 NA 0.89 <0.14 0.42 NA 0.55 1.9 <0.20 NA NA NA 1.90 0.66 1.40 ND ON 8/12/2021 NA 0.37 <0.14 0.73 NA 0.21 2.3 <0.19 NA NA NA 0.70 0.26 1.0 ND OFF 11/13/2021 NA 0.82 <0.14 0.40 NA 0.42 1.9 <0.19 NA NA NA 1.40 0.48 1.3 ND ON 8/12/2021 NA 0.35 <0.16 0.45 NA 0.22 2.3 <0.22 NA NA NA 0.70 0.25 1.0 ND OFF 11/13/2021 NA 0.84 <0.14 0.41 NA 0.58 1.9 <0.20 NA NA NA 2.00 0.72 1.4 ND x OFF 11/13/2021 NA 0.84 <0.15 0.40 NA 0.58 1.9 <0.21 NA NA NA 2.00 0.72 1.4 ND ON 8/12/2021 NA 0.36 <0.14 0.50 NA 0.24 2.3 <0.20 NA NA NA 0.82 0.28 1.0 ND x ON 8/12/2021 NA 0.35 <0.14 0.45 NA 0.25 2.3 <0.20 NA NA NA 0.83 0.32 1.1 ND OFF 11/13/2021 NA 0.84 <0.14 0.41 NA 0.56 1.9 <0.19 NA NA NA 1.90 0.70 1.4 ND OA-1 -- 8/12/2021 NA 0.40 <0.15 0.47 NA 0.17 2.3 <0.20 NA NA NA 0.50 0.20 0.80 ND OA-2 -- 8/12/2021 NA 0.41 <0.15 0.46 NA 0.19 2.3 <0.21 NA NA NA 0.59 0.22 0.90 ND OA-3 -- 8/12/2021 NA 0.42 <0.14 0.46 NA 0.16 2.3 <0.20 NA NA NA 0.48 0.18 0.79 ND Notes:

1. Indoor air screening values are from DTSC HHRA Note 3 (DTSC, 2020). Where there were no DTSC screening levels, USEPA indoor air screening levels were used instead (USEPA, 2020). In both cases, the lifetime incremental cancer risk level was 1E-6 for carcinogens and the hazard index was 1.0

2. Subslab screening level calculated using the generic attenuation factor 0.03 All screening levels and analytical results are reported in micrograms per cubic meter (µg/m3) Bolded values indicate constituent was reported above laboratory reporting limit Shaded detections represent exceedances of respective screening levels. -- = not applicable
DTSC = Department of Toxic Substances Control
HHRA = Human Health Risk Assessment
HVAC = heating, ventilation and air conditioning
NA = not analyzed
ND = not detected above laboratory reporting limits
USEPA = United States Environmental Protection Agency
Screening Levels 2
Screening Levels 1 Outdoor Air Sub-Slab
VP-5
IA-5
IA-1
IA-2
IA-3 Indoor Air IA-4
Geosyntec Consultants, Inc. 1 of 1 12/16/2021
Attachment 1
Eurofins Air Toxics Laboratory Reports
3043 Gold Canal Drive Suite 100
Rancho Cordova, CA 95670
PH 916-637-8048
www.geosyntec.com
DelPasoBlvd_IA_SV_Stage2A_DVMemo_Final.docx Final Review: S. Scudder 9/2/2021 Memorandum
Date: 2 September 2021
To: Laura Foot
From: Morgan Greenwald
CC: Susan Scudder
Subject: Stage 2A Data Validation - Level II Data Deliverables, Eurofins Air Toxics LLC (Air Toxics) Laboratory Reports for Workorder Numbers 2108316A, 2108316B, and 2108316C
SITE: Del Paso Boulevard Site, Sacramento, California

INTRODUCTION
This report summarizes the findings of the Stage 2A data validation of three outdoor air samples, five indoor air samples, five soil vapor samples, one indoor air field duplicate sample, and one soil vapor field duplicate sample, collected on 12 and 13 August 2021, at the Del Paso Boulevard Site located in Sacramento, California. The samples were submitted to Air Toxics in Folsom, California. The samples were analyzed for the following tests:
• Volatile Organic Compounds (VOCs) by United States Environmental Protection Agency (USEPA) Method TO-15 and Modified Method TO-15 using selective ion monitoring (SIM) mode
• Helium by Modified American Society for Testing Materials (ASTM) Method D-1946

EXECUTIVE SUMMARY
Overall, based on this Stage 2A data validation covering the quality control (QC) parameters listed below and based on the information provided, the data as qualified are usable for supporting project objectives. The qualified data should be used within the limitations of the qualifications.

The data were reviewed based on the USEPA National Functional Guidelines for Superfund Organic Methods Data Review, November 2020 (EPA 540-R-20-005), as well as the pertinent methods referenced by the laboratory reports and professional and technical judgment.

The following samples were analyzed and validated at a Stage 2A level in the data sets:

Laboratory ID
Additional
Laboratory
ID
Client ID
2108316A-01A -- IA-1-20210812
Laboratory ID
Additional
Laboratory
ID
Client ID
2108316A-02A -- IA-2-20210812
Del Paso Boulevard Data Validation
2 September 2021

Page 2 ends

DelPasoBlvd_IA_SV_Stage2A_DVMemo_Final.docx Final Review: S. Scudder 9/2/2021 Laboratory ID
Additional
Laboratory
ID
Client ID
2108316A-03A -- IA-3-20210812
2108316A-04A -- IA-4-20210812
2108316A-05A -- IA-5-20210812
2108316A-06A -- DUP-IA-20210812
2108316A-07A -- OA-1-20210812
2108316A-08A -- OA-2-20210812
2108316A-09A -- OA-3-20210812
Laboratory ID
Additional
Laboratory
ID
Client ID
2108316B-10A 2108316C-10A VP-1-20210813
2108316B-11A 2108316C-10A VP-2-20210813
2108316B-12A 2108316C-10A VP-3-20210813
2108316B-13A 2108316C-10A VP-4-20210813
2108316B-14A 2108316C-10A VP-5-20210813
2108316B-15A 2108316C-10A DUP-VP-20210813
Incorrect error corrections were observed on the chain of custody (COC) form, instead of the proper procedure of a single strike through, correction, and initials and date of person making the corrections.

1.0 VOLATILE ORGANIC COMPOUNDS
The samples were analyzed for VOCs per USEPA Method TO-15 and Modified USEPA Method TO-15 SIM.

The areas of data review are listed below. A leading check mark () indicates an area of review in which the data were acceptable. A preceding crossed circle (⊗) signifies areas where issues were raised during the course of the validation review and should be considered to determine any impact on data quality and usability.
 Overall Assessment
 Holding Times
 Method Blank
 Laboratory Control Sample
 Surrogates
 Field Duplicate
 Sensitivity
 Electronic Data Deliverable Review

1.1 Overall Assessment
The VOC data reported in the laboratory reports are considered usable for supporting project objectives. The results are considered valid; the analytical completeness, defined as the ratio of the number of valid analytical results (valid analytical results include values qualified as estimated) to the total number of analytical results requested on samples submitted for these analyses, for the sample sets is 100%.

Del Paso Boulevard Data Validation
2 September 2021

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DelPasoBlvd_IA_SV_Stage2A_DVMemo_Final.docx Final Review: S. Scudder 9/2/2021 The continuing calibration verification (CCV) standards associated with the sample sets were reported. The percent differences (%Ds) were within the method specified acceptance criteria.

1.2 Holding Times
The holding time for the VOC analysis of an air sample collected in a canister is 30 days from sample collection to analysis. The holding times were met for the sample analyses.

1.3 Method Blank
Method blanks were analyzed at the proper frequency for the number and types of samples analyzed (one per batch of 20 samples). One method blank was reported for Method TO-15 (2108316B-16A) and one method blank was reported for Modified Method TO-15 SIM (2108316A-10A). VOCs were not detected in the method blanks above the reporting limits (RLs).

1.4 Laboratory Control Sample (LCS)
LCSs were analyzed at the proper frequency for the number and types of samples analyzed (one per batch of 20 samples). Two LCS/LCS duplicate (LCSD) pairs were reported. The recoveries and relative percent differences (RPDs) were within the laboratory specified acceptance criteria.

The RPDs were not reported by Air Toxics; they were calculated by the data validator.

1.5 Surrogates
Acceptable surrogate recoveries were reported for the sample analyses.

1.6 Field Duplicate
One soil vapor field duplicate sample, DUP-VP-20210813, and one indoor air field duplicate sample, DUP-IA-20210812, were collected with the sample set. Acceptable precision (RPD <30%) was demonstrated between the field duplicates and the original samples, VP-5-20210813 and IA-5-20210812, respectively.

1.7 Sensitivity
The samples were reported to the RLs. Elevated non-detect results were reported due to the dilutions analyzed.

1.8 Electronic Data Deliverable (EDD) Review
Results and sample IDs in the EDDs were reviewed against the information provided by the associated level II reports at a minimum of 20%. No discrepancies were identified between the level II reports and the EDDs.

Del Paso Boulevard Data Validation
2 September 2021

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DelPasoBlvd_IA_SV_Stage2A_DVMemo_Final.docx Final Review: S. Scudder 9/2/2021

2.0 HELIUM
The samples were analyzed for helium per Modified Method ASTM D-1946.

The areas of data review are listed below. A leading check mark () indicates an area of review in which the data were acceptable. A preceding crossed circle (⊗) signifies areas where issues were raised during the course of the validation review and should be considered to determine any impact on data quality and usability.
 Overall Assessment
 Holding Times
 Method Blank
 Laboratory Control Sample
⊗ Field Duplicate
 Sensitivity
 Electronic Data Deliverable Review

2.1 Overall Assessment
The helium data reported in the laboratory report are considered usable for supporting project objectives. The results are considered valid; the analytical completeness, defined as the ratio of the number of valid analytical results (valid analytical results include values qualified as estimated) to the total number of analytical results requested on samples submitted for this analysis, for the sample set is 100%.

The CCV standard associated with the sample set was reported. The %D was within the method specified acceptance criteria.

2.2 Holding Times
The holding time for the helium analysis of an air sample collected in a canister is 30 days from sample collection to analysis. The holding times were met for the sample analyses.

2.3 Method Blank
Method blanks were analyzed at the proper frequency for the number and types of samples analyzed (one per batch of 20 samples). One method blank was reported (2108316C-16A). Helium was not detected in the method blank above the RL.

2.4 Laboratory Control Sample
LCSs were analyzed at the proper frequency for the number and types of samples analyzed (one per batch of 20 samples). One LCS/LCSD pair was reported. The recoveries and RPD were within Del Paso Boulevard Data Validation
2 September 2021

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DelPasoBlvd_IA_SV_Stage2A_DVMemo_Final.docx Final Review: S. Scudder 9/2/2021 the laboratory specified acceptance criteria. The RPD was not reported by Air Toxics; it was calculated by the data validator.

2.5 Field Duplicate
One soil vapor field duplicate sample, DUP-VP-20210813, was collected with the sample set.

Acceptable precision (RPD <30%) was not demonstrated between the field duplicate and the original sample, VP-5-20210813. Therefore, the helium concentrations in the field duplicate pair were J qualified as estimated.

Sample ID Analyte
Laboratory
Result
(%)
Laboratory
Flag
RPD
(%)
Validation
Result
(%)
Validation
Qualifier*
Reason
Code**
VP-5-20210813 Helium 2.3 NA
52 2.3 J 7
DUP-VP-20210813 Helium 3.9 NA 3.9 J 7
% - percent
NA-not applicable
* Validation qualifiers are defined in Attachment 1 at the end of this report ** Reason codes are defined in Attachment 2 at the end of this report

2.6 Sensitivity
The samples were reported to the RL. Elevated non-detect results were reported due to the dilutions analyzed.

2.7 Electronic Data Deliverable Review
Results and sample IDs in the EDD were reviewed against the information provided by the associated level II report at a minimum of 20%. No discrepancies were identified between the level II report and the EDD.
* * * * *
Del Paso Boulevard Data Validation
2 September 2021

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DelPasoBlvd_IA_SV_Stage2A_DVMemo_Final.docx Final Review: S. Scudder 9/2/2021 ATTACHMENT 1

DATA VALIDATION QUALIFIER DEFINITIONS

AND INTERPRETATION KEY
Assigned by Geosyntec’s Data Validation Team

DATA QUALIFIER DEFINITIONS
U The analyte was analyzed for, but was not detected at or above the reported sample quantitation limit. Upon application of the U qualifier to a reported result, the definition changes to “not detected at or above the reported result”.

J The analyte was positively identified; the associated numerical value is the approximate concentration of the analyte in the sample.

J+ The analyte was positively identified; however, the associated numerical value is likely to be higher than the concentration of the analyte in the sample due to positive bias of associated QC or calibration data or attributable to matrix interference.

J- The analyte was positively identified; however, the associated numerical value is likely to be lower than the concentration of the analyte in the sample due to negative bias of associated QC or calibration data or attributable to matrix interference.

UJ The analyte was not detected above the reported sample quantitation limit. However, the reported quantitation limit is approximate and may or may not represent the actual limit of quantitation necessary to accurately and precisely measure the analyte in the sample.

R The sample results are rejected due to serious deficiencies in the ability to analyze the sample and meet quality control criteria. The presence or absence of the analyte cannot be verified.

Del Paso Boulevard Data Validation
2 September 2021

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DelPasoBlvd_IA_SV_Stage2A_DVMemo_Final.docx Final Review: S. Scudder 9/2/2021 ATTACHMENT 2

DATA VALIDATION REASON CODES
Assigned by Geosyntec’s Data Validation Team
Valid Value Description
1 Preservation requirement not met
2 Extraction or analysis holding time exceeded
3 Blank contamination (i.e., method, trip, equipment, etc.) 4 Matrix spike/matrix spike duplicate recovery or RPD outside limits 5 LCS recovery outside limits or RPD outside limits (LCS/LCSD) 6 Surrogate recovery outside limits
7 Field Duplicate RPD exceeded
8 Serial dilution percent difference exceeded
9 Calibration criteria not met
10 Linear range exceeded
11 Internal standard criteria not met
12 Lab duplicates RPD exceeded
13 Other
14 Lab flag removed: no validation qualification required LCS - Laboratory Control Sample
LCSD - Laboratory Control Sample duplicate
RPD - Relative percent difference
8/23/2021
Ms. Laura Foot
GeoSyntec Consultants
3043 Gold Canal Drive, Suite 100
Rancho Cordova CA 95670
Project Name: Del Paso Blvd
Project #: SAC299
Dear Ms. Laura Foot
The following report includes the data for the above referenced project for sample(s) received on 8/13/2021 at Eurofins Air Toxics LLC.

The data and associated QC analyzed by Modified TO-15 SIM are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative.

Thank you for choosing Eurofins Air Toxics LLC. for your air analysis needs. Eurofins Air Toxics Inc. is committed to providing accurate data of the highest quality. Please feel free to contact the Project Manager: Monica Tran at 916-985-1000 if you have any questions regarding the data in this report.

Regards,
Monica Tran
Project Manager
Workorder #: 2108316A

Page 1 of 20 ends

Ms. Laura Foot
GeoSyntec Consultants
3043 Gold Canal Drive, Suite 100
Rancho Cordova, CA 95670
WORK ORDER #: 2108316A
CLIENT: BILL TO:

PHONE:

Ms. Laura Foot
GeoSyntec Consultants
3043 Gold Canal Drive, Suite 100
Rancho Cordova, CA 95670
916-637-8338
08/13/2021
DATE COMPLETED: 08/23/2021
P.O. # 100028804
PROJECT # SAC299 Del Paso Blvd
Work Order Summary
FAX:

DATE RECEIVED: CONTACT: Monica Tran
FRACTION # NAME TEST VAC./PRES.

RECEIPT

PRESSURE
FINAL
01A IA-1-20210812 Modified TO-15 SIM 6.1 "Hg 1.9 psi
02A IA-2-20210812 Modified TO-15 SIM 6.5 "Hg 1.9 psi
03A IA-3-20210812 Modified TO-15 SIM 5.7 "Hg 1.8 psi
04A IA-4-20210812 Modified TO-15 SIM 8.8 "Hg 1.9 psi
05A IA-5-20210812 Modified TO-15 SIM 6.7 "Hg 1.8 psi
06A DUP-IA-20210812 Modified TO-15 SIM 6.3 "Hg 2 psi
07A OA-1-20210812 Modified TO-15 SIM 7.6 "Hg 1.9 psi
08A OA-2-20210812 Modified TO-15 SIM 7.8 "Hg 1.9 psi
09A OA-3-20210812 Modified TO-15 SIM 6.9 "Hg 2 psi
10A Lab Blank Modified TO-15 SIM NA NA
11A CCV Modified TO-15 SIM NA NA
12A LCS Modified TO-15 SIM NA NA
12AA LCSD Modified TO-15 SIM NA NA
CERTIFIED BY:

Technical Director
DATE:
08/23/21

Page 2 of 20 ends

Certification numbers: AZ Licensure AZ0775, FL NELAP – E87680, LA NELAP – 02089, NH NELAP - 209220, NJ NELAP - CA016, NY NELAP - 11291, TX NELAP - T104704434-20-16, UT NELAP – CA009332020-12, VA NELAP - 10615, WA NELAP - C935 Name of Accreditation Body: NELAP/ORELAP (Oregon Environmental Laboratory Accreditation Program) Accreditation number: CA300005-014, Effective date: 10/18/2020, Expiration date: 10/17/2021.

Eurofins Air Toxics, LLC certifies that the test results contained in this report meet all requirements of the NELAC standards This report shall not be reproduced, except in full, without the written approval of Eurofins Air Toxics, LLC. 180 BLUE RAVINE ROAD, SUITE B FOLSOM, CA - 95630
(916) 985-1000 . (800) 985-5955 . FAX (916) 351-8279

LABORATORY NARRATIVE
Modified TO-15 SIM
GeoSyntec Consultants
Workorder# 2108316A
Nine 6 Liter Summa Canister (100% SIM Ambient) samples were received on August 13, 2021. The laboratory performed analysis via modified EPA Method TO-15 using GC/MS in the SIM acquisition mode.

Method modifications taken to run these samples are summarized in the table below. Specific project requirements may over-ride the EATL modifications.

Requirement TO-15 ATL Modifications
ICAL %RSD acceptance criteria </=30% RSD with 2
compounds allowed out
to < 40% RSD
Project specific; default criteria is </=30% RSD with 10% of compounds allowed out to < 40% RSD
Daily Calibration +- 30% Difference Project specific; default criteria is </= 30% Difference with 10% of compounds allowed out up to </=40%.; flag
and narrate outliers
Blank and standards Zero air Nitrogen
Method Detection Limit Follow 40CFR Pt.136
App. B
The MDL met all relevant requirements in Method TO-15
(statistical MDL less than the LOQ). The concentration of the spiked replicate may have exceeded 10X the
calculated MDL in some cases
Receiving Notes
There were no receiving discrepancies.

There were no analytical discrepancies.

Analytical Notes
The following qualifiers may have been used on the data analysis sheets and indicate as follows:

B - Compound present in laboratory blank greater than reporting limit (background subtraction not performed).

J - Estimated value.

E - Exceeds instrument calibration range.

S - Saturated peak.

Q - Exceeds quality control limits.

U - Compound analyzed for but not detected above the reporting limit, LOD, or MDL value. See data page for project specific U-flag definition.

UJ- Non-detected compound associated with low bias in the CCV N - The identification is based on presumptive evidence.

CN- See Case Narrative.

File extensions may have been used on the data analysis sheets and indicates as follows:

Definition of Data Qualifying Flags

Page 3 of 20 ends

a-File was requantified
b-File was quantified by a second column and detector
r1-File was requantified for the purpose of reissue

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MODIFIED EPA METHOD TO-15 GC/MS SIM
Summary of Detected Compounds
Client Sample ID: IA-1-20210812
Lab ID#: 2108316A-01A
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.028 0.45 0.14 2.2
Carbon Tetrachloride 0.028 0.071 0.18 0.44
Benzene 0.071 0.12 0.23 0.37
Toluene 0.071 0.29 0.27 1.1
Ethyl Benzene 0.028 0.056 0.12 0.24
m,p-Xylene 0.057 0.19 0.25 0.83
o-Xylene 0.028 0.069 0.12 0.30
Client Sample ID: IA-2-20210812
Lab ID#: 2108316A-02A
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.029 0.46 0.14 2.3
Carbon Tetrachloride 0.029 0.073 0.18 0.46
Benzene 0.072 0.11 0.23 0.35
Toluene 0.072 0.26 0.27 0.98
Ethyl Benzene 0.029 0.047 0.12 0.20
m,p-Xylene 0.058 0.15 0.25 0.66
o-Xylene 0.029 0.054 0.12 0.24
Client Sample ID: IA-3-20210812
Lab ID#: 2108316A-03A
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.028 0.46 0.14 2.3
Carbon Tetrachloride 0.028 0.12 0.17 0.73
Benzene 0.070 0.11 0.22 0.37
Toluene 0.070 0.27 0.26 1.0
Ethyl Benzene 0.028 0.048 0.12 0.21
m,p-Xylene 0.056 0.16 0.24 0.70
o-Xylene 0.028 0.060 0.12 0.26

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MODIFIED EPA METHOD TO-15 GC/MS SIM
Summary of Detected Compounds
Client Sample ID: IA-4-20210812
Lab ID#: 2108316A-04A
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.032 0.47 0.16 2.3
Carbon Tetrachloride 0.032 0.072 0.20 0.45
Benzene 0.080 0.11 0.26 0.35
Toluene 0.080 0.27 0.30 1.0
Ethyl Benzene 0.032 0.050 0.14 0.22
m,p-Xylene 0.064 0.16 0.28 0.70
o-Xylene 0.032 0.057 0.14 0.25
Client Sample ID: IA-5-20210812
Lab ID#: 2108316A-05A
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.029 0.46 0.14 2.3
Carbon Tetrachloride 0.029 0.079 0.18 0.50
Benzene 0.072 0.11 0.23 0.36
Toluene 0.072 0.28 0.27 1.0
Ethyl Benzene 0.029 0.055 0.12 0.24
m,p-Xylene 0.058 0.19 0.25 0.82
o-Xylene 0.029 0.066 0.12 0.28
Client Sample ID: DUP-IA-20210812
Lab ID#: 2108316A-06A
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.029 0.46 0.14 2.3
Carbon Tetrachloride 0.029 0.072 0.18 0.45
Benzene 0.072 0.11 0.23 0.35
Toluene 0.072 0.30 0.27 1.1
Ethyl Benzene 0.029 0.057 0.12 0.25
m,p-Xylene 0.058 0.19 0.25 0.83
o-Xylene 0.029 0.073 0.12 0.32

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MODIFIED EPA METHOD TO-15 GC/MS SIM
Summary of Detected Compounds
Client Sample ID: OA-1-20210812
Lab ID#: 2108316A-07A
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.030 0.46 0.15 2.3
Carbon Tetrachloride 0.030 0.074 0.19 0.47
Benzene 0.076 0.13 0.24 0.40
Toluene 0.076 0.21 0.28 0.80
Ethyl Benzene 0.030 0.039 0.13 0.17
m,p-Xylene 0.060 0.12 0.26 0.50
o-Xylene 0.030 0.045 0.13 0.20
Client Sample ID: OA-2-20210812
Lab ID#: 2108316A-08A
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.030 0.46 0.15 2.3
Carbon Tetrachloride 0.030 0.073 0.19 0.46
Benzene 0.076 0.13 0.24 0.41
Toluene 0.076 0.24 0.29 0.90
Ethyl Benzene 0.030 0.043 0.13 0.19
m,p-Xylene 0.061 0.14 0.26 0.59
o-Xylene 0.030 0.050 0.13 0.22
Client Sample ID: OA-3-20210812
Lab ID#: 2108316A-09A
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.030 0.47 0.15 2.3
Carbon Tetrachloride 0.030 0.073 0.19 0.46
Benzene 0.074 0.13 0.24 0.42
Toluene 0.074 0.21 0.28 0.79
Ethyl Benzene 0.030 0.037 0.13 0.16
m,p-Xylene 0.059 0.11 0.26 0.48
o-Xylene 0.030 0.040 0.13 0.18

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Client Sample ID: IA-1-20210812
Lab ID#: 2108316A-01A
MODIFIED EPA METHOD TO-15 GC/MS SIM
File Name: v081709sim
Dil. Factor: 1.42
Date of Collection: 8/12/21 4:33:00 PM
Date of Analysis: 8/17/21 03:13 PM
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.028 0.45 0.14 2.2
Freon 114 0.028 Not Detected 0.20 Not Detected
Chloromethane 0.71 Not Detected 1.5 Not Detected
Vinyl Chloride 0.014 Not Detected 0.036 Not Detected
Chloroethane 0.071 Not Detected 0.19 Not Detected
1,1-Dichloroethene 0.014 Not Detected 0.056 Not Detected trans-1,2-Dichloroethene 0.14 Not Detected 0.56 Not Detected Methyl tert-butyl ether 0.14 Not Detected 0.51 Not Detected 1,1-Dichloroethane 0.028 Not Detected 0.11 Not Detected cis-1,2-Dichloroethene 0.028 Not Detected 0.11 Not Detected Chloroform 0.028 Not Detected 0.14 Not Detected
1,1,1-Trichloroethane 0.028 Not Detected 0.15 Not Detected Carbon Tetrachloride 0.028 0.071 0.18 0.44
Benzene 0.071 0.12 0.23 0.37
1,2-Dichloroethane 0.028 Not Detected 0.11 Not Detected Trichloroethene 0.028 Not Detected 0.15 Not Detected
Toluene 0.071 0.29 0.27 1.1
1,1,2-Trichloroethane 0.028 Not Detected 0.15 Not Detected Tetrachloroethene 0.028 Not Detected 0.19 Not Detected
1,2-Dibromoethane (EDB) 0.028 Not Detected 0.22 Not Detected Ethyl Benzene 0.028 0.056 0.12 0.24
m,p-Xylene 0.057 0.19 0.25 0.83
o-Xylene 0.028 0.069 0.12 0.30
1,1,2,2-Tetrachloroethane 0.028 Not Detected 0.19 Not Detected 1,4-Dichlorobenzene 0.028 Not Detected 0.17 Not Detected Container Type: 6 Liter Summa Canister (100% SIM Ambient) Surrogates %Recovery Limits
Method
1,2-Dichloroethane-d4 99 70-130
Toluene-d8 98 70-130
4-Bromofluorobenzene 96 70-130

Page 8 of 20 ends

Client Sample ID: IA-2-20210812
Lab ID#: 2108316A-02A
MODIFIED EPA METHOD TO-15 GC/MS SIM
File Name: v081712sim
Dil. Factor: 1.44
Date of Collection: 8/12/21 3:42:00 PM
Date of Analysis: 8/17/21 05:27 PM
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.029 0.46 0.14 2.3
Freon 114 0.029 Not Detected 0.20 Not Detected
Chloromethane 0.72 Not Detected 1.5 Not Detected
Vinyl Chloride 0.014 Not Detected 0.037 Not Detected
Chloroethane 0.072 Not Detected 0.19 Not Detected
1,1-Dichloroethene 0.014 Not Detected 0.057 Not Detected trans-1,2-Dichloroethene 0.14 Not Detected 0.57 Not Detected Methyl tert-butyl ether 0.14 Not Detected 0.52 Not Detected 1,1-Dichloroethane 0.029 Not Detected 0.12 Not Detected cis-1,2-Dichloroethene 0.029 Not Detected 0.11 Not Detected Chloroform 0.029 Not Detected 0.14 Not Detected
1,1,1-Trichloroethane 0.029 Not Detected 0.16 Not Detected Carbon Tetrachloride 0.029 0.073 0.18 0.46
Benzene 0.072 0.11 0.23 0.35
1,2-Dichloroethane 0.029 Not Detected 0.12 Not Detected Trichloroethene 0.029 Not Detected 0.15 Not Detected
Toluene 0.072 0.26 0.27 0.98
1,1,2-Trichloroethane 0.029 Not Detected 0.16 Not Detected Tetrachloroethene 0.029 Not Detected 0.20 Not Detected
1,2-Dibromoethane (EDB) 0.029 Not Detected 0.22 Not Detected Ethyl Benzene 0.029 0.047 0.12 0.20
m,p-Xylene 0.058 0.15 0.25 0.66
o-Xylene 0.029 0.054 0.12 0.24
1,1,2,2-Tetrachloroethane 0.029 Not Detected 0.20 Not Detected 1,4-Dichlorobenzene 0.029 Not Detected 0.17 Not Detected Container Type: 6 Liter Summa Canister (100% SIM Ambient) Surrogates %Recovery Limits
Method
1,2-Dichloroethane-d4 102 70-130
Toluene-d8 99 70-130
4-Bromofluorobenzene 92 70-130

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Client Sample ID: IA-3-20210812
Lab ID#: 2108316A-03A
MODIFIED EPA METHOD TO-15 GC/MS SIM
File Name: v081711sim
Dil. Factor: 1.39
Date of Collection: 8/12/21 4:32:00 PM
Date of Analysis: 8/17/21 04:33 PM
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.028 0.46 0.14 2.3
Freon 114 0.028 Not Detected 0.19 Not Detected
Chloromethane 0.70 Not Detected 1.4 Not Detected
Vinyl Chloride 0.014 Not Detected 0.036 Not Detected
Chloroethane 0.070 Not Detected 0.18 Not Detected
1,1-Dichloroethene 0.014 Not Detected 0.055 Not Detected trans-1,2-Dichloroethene 0.14 Not Detected 0.55 Not Detected Methyl tert-butyl ether 0.14 Not Detected 0.50 Not Detected 1,1-Dichloroethane 0.028 Not Detected 0.11 Not Detected cis-1,2-Dichloroethene 0.028 Not Detected 0.11 Not Detected Chloroform 0.028 Not Detected 0.14 Not Detected
1,1,1-Trichloroethane 0.028 Not Detected 0.15 Not Detected Carbon Tetrachloride 0.028 0.12 0.17 0.73
Benzene 0.070 0.11 0.22 0.37
1,2-Dichloroethane 0.028 Not Detected 0.11 Not Detected Trichloroethene 0.028 Not Detected 0.15 Not Detected
Toluene 0.070 0.27 0.26 1.0
1,1,2-Trichloroethane 0.028 Not Detected 0.15 Not Detected Tetrachloroethene 0.028 Not Detected 0.19 Not Detected
1,2-Dibromoethane (EDB) 0.028 Not Detected 0.21 Not Detected Ethyl Benzene 0.028 0.048 0.12 0.21
m,p-Xylene 0.056 0.16 0.24 0.70
o-Xylene 0.028 0.060 0.12 0.26
1,1,2,2-Tetrachloroethane 0.028 Not Detected 0.19 Not Detected 1,4-Dichlorobenzene 0.028 Not Detected 0.17 Not Detected Container Type: 6 Liter Summa Canister (100% SIM Ambient) Surrogates %Recovery Limits
Method
1,2-Dichloroethane-d4 102 70-130
Toluene-d8 98 70-130
4-Bromofluorobenzene 96 70-130

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Client Sample ID: IA-4-20210812
Lab ID#: 2108316A-04A
MODIFIED EPA METHOD TO-15 GC/MS SIM
File Name: v081713sim
Dil. Factor: 1.60
Date of Collection: 8/12/21 3:15:00 PM
Date of Analysis: 8/17/21 06:07 PM
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.032 0.47 0.16 2.3
Freon 114 0.032 Not Detected 0.22 Not Detected
Chloromethane 0.80 Not Detected 1.6 Not Detected
Vinyl Chloride 0.016 Not Detected 0.041 Not Detected
Chloroethane 0.080 Not Detected 0.21 Not Detected
1,1-Dichloroethene 0.016 Not Detected 0.063 Not Detected trans-1,2-Dichloroethene 0.16 Not Detected 0.63 Not Detected Methyl tert-butyl ether 0.16 Not Detected 0.58 Not Detected 1,1-Dichloroethane 0.032 Not Detected 0.13 Not Detected cis-1,2-Dichloroethene 0.032 Not Detected 0.13 Not Detected Chloroform 0.032 Not Detected 0.16 Not Detected
1,1,1-Trichloroethane 0.032 Not Detected 0.17 Not Detected Carbon Tetrachloride 0.032 0.072 0.20 0.45
Benzene 0.080 0.11 0.26 0.35
1,2-Dichloroethane 0.032 Not Detected 0.13 Not Detected Trichloroethene 0.032 Not Detected 0.17 Not Detected
Toluene 0.080 0.27 0.30 1.0
1,1,2-Trichloroethane 0.032 Not Detected 0.17 Not Detected Tetrachloroethene 0.032 Not Detected 0.22 Not Detected
1,2-Dibromoethane (EDB) 0.032 Not Detected 0.24 Not Detected Ethyl Benzene 0.032 0.050 0.14 0.22
m,p-Xylene 0.064 0.16 0.28 0.70
o-Xylene 0.032 0.057 0.14 0.25
1,1,2,2-Tetrachloroethane 0.032 Not Detected 0.22 Not Detected 1,4-Dichlorobenzene 0.032 Not Detected 0.19 Not Detected Container Type: 6 Liter Summa Canister (100% SIM Ambient) Surrogates %Recovery Limits
Method
1,2-Dichloroethane-d4 101 70-130
Toluene-d8 99 70-130
4-Bromofluorobenzene 93 70-130

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Client Sample ID: IA-5-20210812
Lab ID#: 2108316A-05A
MODIFIED EPA METHOD TO-15 GC/MS SIM
File Name: v081714sim
Dil. Factor: 1.45
Date of Collection: 8/12/21 4:30:00 PM
Date of Analysis: 8/17/21 06:47 PM
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.029 0.46 0.14 2.3
Freon 114 0.029 Not Detected 0.20 Not Detected
Chloromethane 0.72 Not Detected 1.5 Not Detected
Vinyl Chloride 0.014 Not Detected 0.037 Not Detected
Chloroethane 0.072 Not Detected 0.19 Not Detected
1,1-Dichloroethene 0.014 Not Detected 0.057 Not Detected trans-1,2-Dichloroethene 0.14 Not Detected 0.57 Not Detected Methyl tert-butyl ether 0.14 Not Detected 0.52 Not Detected 1,1-Dichloroethane 0.029 Not Detected 0.12 Not Detected cis-1,2-Dichloroethene 0.029 Not Detected 0.11 Not Detected Chloroform 0.029 Not Detected 0.14 Not Detected
1,1,1-Trichloroethane 0.029 Not Detected 0.16 Not Detected Carbon Tetrachloride 0.029 0.079 0.18 0.50
Benzene 0.072 0.11 0.23 0.36
1,2-Dichloroethane 0.029 Not Detected 0.12 Not Detected Trichloroethene 0.029 Not Detected 0.16 Not Detected
Toluene 0.072 0.28 0.27 1.0
1,1,2-Trichloroethane 0.029 Not Detected 0.16 Not Detected Tetrachloroethene 0.029 Not Detected 0.20 Not Detected
1,2-Dibromoethane (EDB) 0.029 Not Detected 0.22 Not Detected Ethyl Benzene 0.029 0.055 0.12 0.24
m,p-Xylene 0.058 0.19 0.25 0.82
o-Xylene 0.029 0.066 0.12 0.28
1,1,2,2-Tetrachloroethane 0.029 Not Detected 0.20 Not Detected 1,4-Dichlorobenzene 0.029 Not Detected 0.17 Not Detected Container Type: 6 Liter Summa Canister (100% SIM Ambient) Surrogates %Recovery Limits
Method
1,2-Dichloroethane-d4 102 70-130
Toluene-d8 99 70-130
4-Bromofluorobenzene 92 70-130

Page 12 of 20 ends

Client Sample ID: DUP-IA-20210812
Lab ID#: 2108316A-06A
MODIFIED EPA METHOD TO-15 GC/MS SIM
File Name: v081715sim
Dil. Factor: 1.44
Date of Collection: 8/12/21 4:30:00 PM
Date of Analysis: 8/17/21 07:27 PM
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.029 0.46 0.14 2.3
Freon 114 0.029 Not Detected 0.20 Not Detected
Chloromethane 0.72 Not Detected 1.5 Not Detected
Vinyl Chloride 0.014 Not Detected 0.037 Not Detected
Chloroethane 0.072 Not Detected 0.19 Not Detected
1,1-Dichloroethene 0.014 Not Detected 0.057 Not Detected trans-1,2-Dichloroethene 0.14 Not Detected 0.57 Not Detected Methyl tert-butyl ether 0.14 Not Detected 0.52 Not Detected 1,1-Dichloroethane 0.029 Not Detected 0.12 Not Detected cis-1,2-Dichloroethene 0.029 Not Detected 0.11 Not Detected Chloroform 0.029 Not Detected 0.14 Not Detected
1,1,1-Trichloroethane 0.029 Not Detected 0.16 Not Detected Carbon Tetrachloride 0.029 0.072 0.18 0.45
Benzene 0.072 0.11 0.23 0.35
1,2-Dichloroethane 0.029 Not Detected 0.12 Not Detected Trichloroethene 0.029 Not Detected 0.15 Not Detected
Toluene 0.072 0.30 0.27 1.1
1,1,2-Trichloroethane 0.029 Not Detected 0.16 Not Detected Tetrachloroethene 0.029 Not Detected 0.20 Not Detected
1,2-Dibromoethane (EDB) 0.029 Not Detected 0.22 Not Detected Ethyl Benzene 0.029 0.057 0.12 0.25
m,p-Xylene 0.058 0.19 0.25 0.83
o-Xylene 0.029 0.073 0.12 0.32
1,1,2,2-Tetrachloroethane 0.029 Not Detected 0.20 Not Detected 1,4-Dichlorobenzene 0.029 Not Detected 0.17 Not Detected Container Type: 6 Liter Summa Canister (100% SIM Ambient) Surrogates %Recovery Limits
Method
1,2-Dichloroethane-d4 102 70-130
Toluene-d8 99 70-130
4-Bromofluorobenzene 93 70-130

Page 13 of 20 ends

Client Sample ID: OA-1-20210812
Lab ID#: 2108316A-07A
MODIFIED EPA METHOD TO-15 GC/MS SIM
File Name: v081716sim
Dil. Factor: 1.51
Date of Collection: 8/12/21 4:35:00 PM
Date of Analysis: 8/17/21 08:36 PM
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.030 0.46 0.15 2.3
Freon 114 0.030 Not Detected 0.21 Not Detected
Chloromethane 0.76 Not Detected 1.6 Not Detected
Vinyl Chloride 0.015 Not Detected 0.038 Not Detected
Chloroethane 0.076 Not Detected 0.20 Not Detected
1,1-Dichloroethene 0.015 Not Detected 0.060 Not Detected trans-1,2-Dichloroethene 0.15 Not Detected 0.60 Not Detected Methyl tert-butyl ether 0.15 Not Detected 0.54 Not Detected 1,1-Dichloroethane 0.030 Not Detected 0.12 Not Detected cis-1,2-Dichloroethene 0.030 Not Detected 0.12 Not Detected Chloroform 0.030 Not Detected 0.15 Not Detected
1,1,1-Trichloroethane 0.030 Not Detected 0.16 Not Detected Carbon Tetrachloride 0.030 0.074 0.19 0.47
Benzene 0.076 0.13 0.24 0.40
1,2-Dichloroethane 0.030 Not Detected 0.12 Not Detected Trichloroethene 0.030 Not Detected 0.16 Not Detected
Toluene 0.076 0.21 0.28 0.80
1,1,2-Trichloroethane 0.030 Not Detected 0.16 Not Detected Tetrachloroethene 0.030 Not Detected 0.20 Not Detected
1,2-Dibromoethane (EDB) 0.030 Not Detected 0.23 Not Detected Ethyl Benzene 0.030 0.039 0.13 0.17
m,p-Xylene 0.060 0.12 0.26 0.50
o-Xylene 0.030 0.045 0.13 0.20
1,1,2,2-Tetrachloroethane 0.030 Not Detected 0.21 Not Detected 1,4-Dichlorobenzene 0.030 Not Detected 0.18 Not Detected Container Type: 6 Liter Summa Canister (100% SIM Ambient) Surrogates %Recovery Limits
Method
1,2-Dichloroethane-d4 101 70-130
Toluene-d8 99 70-130
4-Bromofluorobenzene 92 70-130

Page 14 of 20 ends

Client Sample ID: OA-2-20210812
Lab ID#: 2108316A-08A
MODIFIED EPA METHOD TO-15 GC/MS SIM
File Name: v081717sim
Dil. Factor: 1.52
Date of Collection: 8/12/21 4:36:00 PM
Date of Analysis: 8/17/21 09:16 PM
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.030 0.46 0.15 2.3
Freon 114 0.030 Not Detected 0.21 Not Detected
Chloromethane 0.76 Not Detected 1.6 Not Detected
Vinyl Chloride 0.015 Not Detected 0.039 Not Detected
Chloroethane 0.076 Not Detected 0.20 Not Detected
1,1-Dichloroethene 0.015 Not Detected 0.060 Not Detected trans-1,2-Dichloroethene 0.15 Not Detected 0.60 Not Detected Methyl tert-butyl ether 0.15 Not Detected 0.55 Not Detected 1,1-Dichloroethane 0.030 Not Detected 0.12 Not Detected cis-1,2-Dichloroethene 0.030 Not Detected 0.12 Not Detected Chloroform 0.030 Not Detected 0.15 Not Detected
1,1,1-Trichloroethane 0.030 Not Detected 0.16 Not Detected Carbon Tetrachloride 0.030 0.073 0.19 0.46
Benzene 0.076 0.13 0.24 0.41
1,2-Dichloroethane 0.030 Not Detected 0.12 Not Detected Trichloroethene 0.030 Not Detected 0.16 Not Detected
Toluene 0.076 0.24 0.29 0.90
1,1,2-Trichloroethane 0.030 Not Detected 0.16 Not Detected Tetrachloroethene 0.030 Not Detected 0.21 Not Detected
1,2-Dibromoethane (EDB) 0.030 Not Detected 0.23 Not Detected Ethyl Benzene 0.030 0.043 0.13 0.19
m,p-Xylene 0.061 0.14 0.26 0.59
o-Xylene 0.030 0.050 0.13 0.22
1,1,2,2-Tetrachloroethane 0.030 Not Detected 0.21 Not Detected 1,4-Dichlorobenzene 0.030 Not Detected 0.18 Not Detected Container Type: 6 Liter Summa Canister (100% SIM Ambient) Surrogates %Recovery Limits
Method
1,2-Dichloroethane-d4 101 70-130
Toluene-d8 99 70-130
4-Bromofluorobenzene 92 70-130

Page 15 of 20 ends

Client Sample ID: OA-3-20210812
Lab ID#: 2108316A-09A
MODIFIED EPA METHOD TO-15 GC/MS SIM
File Name: v081718sim
Dil. Factor: 1.48
Date of Collection: 8/12/21 4:37:00 PM
Date of Analysis: 8/17/21 09:58 PM
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.030 0.47 0.15 2.3
Freon 114 0.030 Not Detected 0.21 Not Detected
Chloromethane 0.74 Not Detected 1.5 Not Detected
Vinyl Chloride 0.015 Not Detected 0.038 Not Detected
Chloroethane 0.074 Not Detected 0.20 Not Detected
1,1-Dichloroethene 0.015 Not Detected 0.059 Not Detected trans-1,2-Dichloroethene 0.15 Not Detected 0.59 Not Detected Methyl tert-butyl ether 0.15 Not Detected 0.53 Not Detected 1,1-Dichloroethane 0.030 Not Detected 0.12 Not Detected cis-1,2-Dichloroethene 0.030 Not Detected 0.12 Not Detected Chloroform 0.030 Not Detected 0.14 Not Detected
1,1,1-Trichloroethane 0.030 Not Detected 0.16 Not Detected Carbon Tetrachloride 0.030 0.073 0.19 0.46
Benzene 0.074 0.13 0.24 0.42
1,2-Dichloroethane 0.030 Not Detected 0.12 Not Detected Trichloroethene 0.030 Not Detected 0.16 Not Detected
Toluene 0.074 0.21 0.28 0.79
1,1,2-Trichloroethane 0.030 Not Detected 0.16 Not Detected Tetrachloroethene 0.030 Not Detected 0.20 Not Detected
1,2-Dibromoethane (EDB) 0.030 Not Detected 0.23 Not Detected Ethyl Benzene 0.030 0.037 0.13 0.16
m,p-Xylene 0.059 0.11 0.26 0.48
o-Xylene 0.030 0.040 0.13 0.18
1,1,2,2-Tetrachloroethane 0.030 Not Detected 0.20 Not Detected 1,4-Dichlorobenzene 0.030 Not Detected 0.18 Not Detected Container Type: 6 Liter Summa Canister (100% SIM Ambient) Surrogates %Recovery Limits
Method
1,2-Dichloroethane-d4 103 70-130
Toluene-d8 101 70-130
4-Bromofluorobenzene 91 70-130

Page 16 of 20 ends

Client Sample ID: Lab Blank
Lab ID#: 2108316A-10A
MODIFIED EPA METHOD TO-15 GC/MS SIM
File Name: v081706sim
Dil. Factor: 1.00
Date of Collection: NA
Date of Analysis: 8/17/21 09:56 AM
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.020 Not Detected 0.099 Not Detected
Freon 114 0.020 Not Detected 0.14 Not Detected
Chloromethane 0.50 Not Detected 1.0 Not Detected
Vinyl Chloride 0.010 Not Detected 0.026 Not Detected
Chloroethane 0.050 Not Detected 0.13 Not Detected
1,1-Dichloroethene 0.010 Not Detected 0.040 Not Detected trans-1,2-Dichloroethene 0.10 Not Detected 0.40 Not Detected Methyl tert-butyl ether 0.10 Not Detected 0.36 Not Detected 1,1-Dichloroethane 0.020 Not Detected 0.081 Not Detected cis-1,2-Dichloroethene 0.020 Not Detected 0.079 Not Detected Chloroform 0.020 Not Detected 0.098 Not Detected
1,1,1-Trichloroethane 0.020 Not Detected 0.11 Not Detected Carbon Tetrachloride 0.020 Not Detected 0.12 Not Detected Benzene 0.050 Not Detected 0.16 Not Detected
1,2-Dichloroethane 0.020 Not Detected 0.081 Not Detected Trichloroethene 0.020 Not Detected 0.11 Not Detected
Toluene 0.050 Not Detected 0.19 Not Detected
1,1,2-Trichloroethane 0.020 Not Detected 0.11 Not Detected Tetrachloroethene 0.020 Not Detected 0.14 Not Detected
1,2-Dibromoethane (EDB) 0.020 Not Detected 0.15 Not Detected Ethyl Benzene 0.020 Not Detected 0.087 Not Detected
m,p-Xylene 0.040 Not Detected 0.17 Not Detected
o-Xylene 0.020 Not Detected 0.087 Not Detected
1,1,2,2-Tetrachloroethane 0.020 Not Detected 0.14 Not Detected 1,4-Dichlorobenzene 0.020 Not Detected 0.12 Not Detected Container Type: NA - Not Applicable
Surrogates %Recovery Limits
Method
1,2-Dichloroethane-d4 106 70-130
Toluene-d8 100 70-130
4-Bromofluorobenzene 92 70-130

Page 17 of 20 ends

Client Sample ID: CCV
Lab ID#: 2108316A-11A
MODIFIED EPA METHOD TO-15 GC/MS SIM
File Name: v081702sim
Dil. Factor: 1.00
Date of Collection: NA
Date of Analysis: 8/17/21 07:15 AM
Compound %Recovery
Freon 12 94
Freon 114 96
Chloromethane 93
Vinyl Chloride 78
Chloroethane 88
1,1-Dichloroethene 85
trans-1,2-Dichloroethene 92
Methyl tert-butyl ether 83
1,1-Dichloroethane 90
cis-1,2-Dichloroethene 89
Chloroform 88
1,1,1-Trichloroethane 97
Carbon Tetrachloride 105
Benzene 95
1,2-Dichloroethane 104
Trichloroethene 102
Toluene 103
1,1,2-Trichloroethane 100
Tetrachloroethene 98
1,2-Dibromoethane (EDB) 99
Ethyl Benzene 99
m,p-Xylene 85
o-Xylene 81
1,1,2,2-Tetrachloroethane 100
1,4-Dichlorobenzene 96
Container Type: NA - Not Applicable
Surrogates %Recovery Limits
Method
1,2-Dichloroethane-d4 98 70-130
Toluene-d8 110 70-130
4-Bromofluorobenzene 96 70-130

Page 18 of 20 ends

Client Sample ID: LCS
Lab ID#: 2108316A-12A
MODIFIED EPA METHOD TO-15 GC/MS SIM
File Name: v081703sim
Dil. Factor: 1.00
Date of Collection: NA
Date of Analysis: 8/17/21 07:55 AM
Compound %Recovery Limits
Method
Freon 12 98 70-130
Freon 114 100 70-130
Chloromethane 100 70-130
Vinyl Chloride 84 70-130
Chloroethane 93 70-130
1,1-Dichloroethene 89 70-130
trans-1,2-Dichloroethene 95 70-130
Methyl tert-butyl ether 89 70-130
1,1-Dichloroethane 94 70-130
cis-1,2-Dichloroethene 93 70-130
Chloroform 90 70-130
1,1,1-Trichloroethane 100 70-130
Carbon Tetrachloride 74 60-140
Benzene 99 70-130
1,2-Dichloroethane 109 70-130
Trichloroethene 105 70-130
Toluene 102 70-130
1,1,2-Trichloroethane 106 70-130
Tetrachloroethene 102 70-130
1,2-Dibromoethane (EDB) 106 70-130
Ethyl Benzene 98 70-130
m,p-Xylene 82 70-130
o-Xylene 77 70-130
1,1,2,2-Tetrachloroethane 106 70-130
1,4-Dichlorobenzene 96 70-130
Container Type: NA - Not Applicable
Surrogates %Recovery Limits
Method
1,2-Dichloroethane-d4 99 70-130
Toluene-d8 107 70-130
4-Bromofluorobenzene 90 70-130

Page 19 of 20 ends

Client Sample ID: LCSD
Lab ID#: 2108316A-12AA
MODIFIED EPA METHOD TO-15 GC/MS SIM
File Name: v081704sim
Dil. Factor: 1.00
Date of Collection: NA
Date of Analysis: 8/17/21 08:36 AM
Compound %Recovery Limits
Method
Freon 12 98 70-130
Freon 114 100 70-130
Chloromethane 100 70-130
Vinyl Chloride 85 70-130
Chloroethane 93 70-130
1,1-Dichloroethene 90 70-130
trans-1,2-Dichloroethene 96 70-130
Methyl tert-butyl ether 90 70-130
1,1-Dichloroethane 95 70-130
cis-1,2-Dichloroethene 93 70-130
Chloroform 90 70-130
1,1,1-Trichloroethane 100 70-130
Carbon Tetrachloride 73 60-140
Benzene 97 70-130
1,2-Dichloroethane 107 70-130
Trichloroethene 104 70-130
Toluene 101 70-130
1,1,2-Trichloroethane 104 70-130
Tetrachloroethene 100 70-130
1,2-Dibromoethane (EDB) 104 70-130
Ethyl Benzene 98 70-130
m,p-Xylene 85 70-130
o-Xylene 81 70-130
1,1,2,2-Tetrachloroethane 105 70-130
1,4-Dichlorobenzene 99 70-130
Container Type: NA - Not Applicable
Surrogates %Recovery Limits
Method
1,2-Dichloroethane-d4 99 70-130
Toluene-d8 106 70-130
4-Bromofluorobenzene 91 70-130

Page 20 of 20 ends

8/20/2021
Ms. Laura Foot
GeoSyntec Consultants
3043 Gold Canal Drive, Suite 100
Rancho Cordova CA 95670
Project Name: Del Paso Blvd
Project #: SAC299
Dear Ms. Laura Foot
The following report includes the data for the above referenced project for sample(s) received on 8/13/2021 at Eurofins Air Toxics LLC.

The data and associated QC analyzed by TO-15 are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative.

Regards,
Monica Tran
Project Manager
Workorder #: 2108316B

Page 1 of 25 ends

Ms. Laura Foot
GeoSyntec Consultants
3043 Gold Canal Drive, Suite 100
Rancho Cordova, CA 95670
WORK ORDER #: 2108316B
CLIENT: BILL TO:

PHONE:

Ms. Laura Foot
GeoSyntec Consultants
3043 Gold Canal Drive, Suite 100
Rancho Cordova, CA 95670
916-637-8338
08/13/2021
DATE COMPLETED: 08/20/2021
P.O. # 100028804
PROJECT # SAC299 Del Paso Blvd
Work Order Summary
FAX:

DATE RECEIVED: CONTACT: Monica Tran
FRACTION # NAME TEST VAC./PRES.

RECEIPT

PRESSURE
FINAL
10A VP-1-20210813 TO-15 4.9 "Hg 9.8 psi
11A VP-2-20210813 TO-15 4.7 "Hg 10.1 psi
12A VP-3-20210813 TO-15 6.3 "Hg 9.8 psi
13A VP-4-20210813 TO-15 4.7 "Hg 10 psi
14A VP-5-20210813 TO-15 4.5 "Hg 10.1 psi
15A DUP-VP-20210813 TO-15 4.5 "Hg 9.8 psi
16A Lab Blank TO-15 NA NA
17A CCV TO-15 NA NA
18A LCS TO-15 NA NA
18AA LCSD TO-15 NA NA
CERTIFIED BY:

Technical Director
DATE:
08/20/21

Page 2 of 25 ends

LABORATORY NARRATIVE
EPA Method TO-15
GeoSyntec Consultants
Workorder# 2108316B
Six 1 Liter Summa Canister samples were received on August 13, 2021. The laboratory performed analysis via EPA Method TO-15 using GC/MS in the full scan mode.

There were no receiving discrepancies.

Receiving Notes
There were no analytical discrepancies.

Analytical Notes
Ten qualifiers may have been used on the data analysis sheets and indicates as follows:

B - Compound present in laboratory blank greater than reporting limit (background subtraction not performed).

J - Estimated value.

E - Exceeds instrument calibration range.

S - Saturated peak.

Q - Exceeds quality control limits.

U - Compound analyzed for but not detected above the reporting limit, LOD, or MDL value. See data page for project specific U-flag definition.

UJ- Non-detected compound associated with low bias in the CCV N - The identification is based on presumptive evidence.

M - Reported value may be biased due to apparent matrix interferences.

CN - See Case Narrative.

File extensions may have been used on the data analysis sheets and indicates as follows:
a-File was requantified
b-File was quantified by a second column and detector
r1-File was requantified for the purpose of reissue
Definition of Data Qualifying Flags

Page 3 of 25 ends

EPA METHOD TO-15 GC/MS FULL SCAN
Summary of Detected Compounds
Client Sample ID: VP-1-20210813
Lab ID#: 2108316B-10A
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Ethanol 10 26 19 49
Acetone 10 18 24 42
2-Propanol 4.0 34 9.8 84
Client Sample ID: VP-2-20210813
Lab ID#: 2108316B-11A
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Ethanol 10 15 19 28
Acetone 10 25 24 59
2-Propanol 4.0 18 9.8 44
Carbon Disulfide 4.0 4.0 12 12
Tetrachloroethene 1.0 1.2 6.8 8.2
Client Sample ID: VP-3-20210813
Lab ID#: 2108316B-12A
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Ethanol 10 18 20 34
Acetone 10 11 25 26
2-Propanol 4.2 110 10 260
Chloroform 1.0 1.1 5.2 5.3
2,2,4-Trimethylpentane 1.0 33 4.9 160
Tetrachloroethene 1.0 16 7.2 110
Client Sample ID: VP-4-20210813
Lab ID#: 2108316B-13A
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Ethanol 10 22 19 41
Acetone 10 14 24 34
2-Propanol 4.0 34 9.8 84

Page 4 of 25 ends

EPA METHOD TO-15 GC/MS FULL SCAN
Summary of Detected Compounds
Client Sample ID: VP-4-20210813
Lab ID#: 2108316B-13A
Tetrachloroethene 1.0 44 6.7 300
Client Sample ID: VP-5-20210813
Lab ID#: 2108316B-14A
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Ethanol 9.9 16 19 30
Acetone 9.9 20 24 46
2-Propanol 4.0 17 9.7 41
Tetrachloroethene 0.99 11 6.7 76
Client Sample ID: DUP-VP-20210813
Lab ID#: 2108316B-15A
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Ethanol 9.8 19 18 36
Acetone 9.8 23 23 55
2-Propanol 3.9 22 9.6 55
Tetrachloroethene 0.98 10 6.6 69

Page 5 of 25 ends

Client Sample ID: VP-1-20210813
Lab ID#: 2108316B-10A
EPA METHOD TO-15 GC/MS FULL SCAN
File Name: 3081713
Dil. Factor: 1.99
Date of Collection: 8/13/21 10:50:00
Date of Analysis: 8/17/21 04:22 PM
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 1.0 Not Detected 4.9 Not Detected
Freon 114 1.0 Not Detected 7.0 Not Detected
Chloromethane 10 Not Detected 20 Not Detected
Vinyl Chloride 1.0 Not Detected 2.5 Not Detected
1,3-Butadiene 1.0 Not Detected 2.2 Not Detected
Bromomethane 10 Not Detected 39 Not Detected
Chloroethane 4.0 Not Detected 10 Not Detected
Freon 11 1.0 Not Detected 5.6 Not Detected
Ethanol 10 26 19 49
Freon 113 1.0 Not Detected 7.6 Not Detected
1,1-Dichloroethene 1.0 Not Detected 3.9 Not Detected
Acetone 10 18 24 42
2-Propanol 4.0 34 9.8 84
Carbon Disulfide 4.0 Not Detected 12 Not Detected
3-Chloropropene 4.0 Not Detected 12 Not Detected
Methylene Chloride 10 Not Detected 34 Not Detected
Methyl tert-butyl ether 4.0 Not Detected 14 Not Detected trans-1,2-Dichloroethene 1.0 Not Detected 3.9 Not Detected Hexane 1.0 Not Detected 3.5 Not Detected
1,1-Dichloroethane 1.0 Not Detected 4.0 Not Detected
2-Butanone (Methyl Ethyl Ketone) 4.0 Not Detected 12 Not Detected cis-1,2-Dichloroethene 1.0 Not Detected 3.9 Not Detected Tetrahydrofuran 1.0 Not Detected 2.9 Not Detected
Chloroform 1.0 Not Detected 4.8 Not Detected
1,1,1-Trichloroethane 1.0 Not Detected 5.4 Not Detected Cyclohexane 1.0 Not Detected 3.4 Not Detected
Carbon Tetrachloride 1.0 Not Detected 6.3 Not Detected
2,2,4-Trimethylpentane 1.0 Not Detected 4.6 Not Detected Benzene 1.0 Not Detected 3.2 Not Detected
1,2-Dichloroethane 1.0 Not Detected 4.0 Not Detected
Heptane 1.0 Not Detected 4.1 Not Detected
Trichloroethene 1.0 Not Detected 5.3 Not Detected
1,2-Dichloropropane 1.0 Not Detected 4.6 Not Detected
1,4-Dioxane 4.0 Not Detected 14 Not Detected
Bromodichloromethane 1.0 Not Detected 6.7 Not Detected
cis-1,3-Dichloropropene 1.0 Not Detected 4.5 Not Detected 4-Methyl-2-pentanone 1.0 Not Detected 4.1 Not Detected
Toluene 1.0 Not Detected 3.7 Not Detected
trans-1,3-Dichloropropene 1.0 Not Detected 4.5 Not Detected 1,1,2-Trichloroethane 1.0 Not Detected 5.4 Not Detected Tetrachloroethene 1.0 Not Detected 6.7 Not Detected
2-Hexanone 4.0 Not Detected 16 Not Detected

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Page 7 of 25 ends

Client Sample ID: VP-2-20210813
Lab ID#: 2108316B-11A
EPA METHOD TO-15 GC/MS FULL SCAN
File Name: 3081715
Dil. Factor: 2.00
Date of Collection: 8/13/21 09:20:00
Date of Analysis: 8/17/21 05:51 PM
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 1.0 Not Detected 4.9 Not Detected
Freon 114 1.0 Not Detected 7.0 Not Detected
Chloromethane 10 Not Detected 21 Not Detected
Vinyl Chloride 1.0 Not Detected 2.6 Not Detected
1,3-Butadiene 1.0 Not Detected 2.2 Not Detected
Bromomethane 10 Not Detected 39 Not Detected
Chloroethane 4.0 Not Detected 10 Not Detected
Freon 11 1.0 Not Detected 5.6 Not Detected
Ethanol 10 15 19 28
Freon 113 1.0 Not Detected 7.7 Not Detected
1,1-Dichloroethene 1.0 Not Detected 4.0 Not Detected
Acetone 10 25 24 59
2-Propanol 4.0 18 9.8 44
Carbon Disulfide 4.0 4.0 12 12
3-Chloropropene 4.0 Not Detected 12 Not Detected
Methylene Chloride 10 Not Detected 35 Not Detected
Methyl tert-butyl ether 4.0 Not Detected 14 Not Detected trans-1,2-Dichloroethene 1.0 Not Detected 4.0 Not Detected Hexane 1.0 Not Detected 3.5 Not Detected
1,1-Dichloroethane 1.0 Not Detected 4.0 Not Detected
2-Butanone (Methyl Ethyl Ketone) 4.0 Not Detected 12 Not Detected cis-1,2-Dichloroethene 1.0 Not Detected 4.0 Not Detected Tetrahydrofuran 1.0 Not Detected 2.9 Not Detected
Chloroform 1.0 Not Detected 4.9 Not Detected
1,1,1-Trichloroethane 1.0 Not Detected 5.4 Not Detected Cyclohexane 1.0 Not Detected 3.4 Not Detected
Carbon Tetrachloride 1.0 Not Detected 6.3 Not Detected
2,2,4-Trimethylpentane 1.0 Not Detected 4.7 Not Detected Benzene 1.0 Not Detected 3.2 Not Detected
1,2-Dichloroethane 1.0 Not Detected 4.0 Not Detected
Heptane 1.0 Not Detected 4.1 Not Detected
Trichloroethene 1.0 Not Detected 5.4 Not Detected
1,2-Dichloropropane 1.0 Not Detected 4.6 Not Detected
1,4-Dioxane 4.0 Not Detected 14 Not Detected
Bromodichloromethane 1.0 Not Detected 6.7 Not Detected
cis-1,3-Dichloropropene 1.0 Not Detected 4.5 Not Detected 4-Methyl-2-pentanone 1.0 Not Detected 4.1 Not Detected
Toluene 1.0 Not Detected 3.8 Not Detected
trans-1,3-Dichloropropene 1.0 Not Detected 4.5 Not Detected 1,1,2-Trichloroethane 1.0 Not Detected 5.4 Not Detected Tetrachloroethene 1.0 1.2 6.8 8.2
2-Hexanone 4.0 Not Detected 16 Not Detected

Page 8 of 25 ends

Page 9 of 25 ends

Client Sample ID: VP-3-20210813
Lab ID#: 2108316B-12A
EPA METHOD TO-15 GC/MS FULL SCAN
File Name: 3081716
Dil. Factor: 2.11
Date of Collection: 8/13/21 14:15:00
Date of Analysis: 8/17/21 06:20 PM
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 1.0 Not Detected 5.2 Not Detected
Freon 114 1.0 Not Detected 7.4 Not Detected
Chloromethane 10 Not Detected 22 Not Detected
Vinyl Chloride 1.0 Not Detected 2.7 Not Detected
1,3-Butadiene 1.0 Not Detected 2.3 Not Detected
Bromomethane 10 Not Detected 41 Not Detected
Chloroethane 4.2 Not Detected 11 Not Detected
Freon 11 1.0 Not Detected 5.9 Not Detected
Ethanol 10 18 20 34
Freon 113 1.0 Not Detected 8.1 Not Detected
1,1-Dichloroethene 1.0 Not Detected 4.2 Not Detected
Acetone 10 11 25 26
2-Propanol 4.2 110 10 260
Carbon Disulfide 4.2 Not Detected 13 Not Detected
3-Chloropropene 4.2 Not Detected 13 Not Detected
Methylene Chloride 10 Not Detected 37 Not Detected
Methyl tert-butyl ether 4.2 Not Detected 15 Not Detected trans-1,2-Dichloroethene 1.0 Not Detected 4.2 Not Detected Hexane 1.0 Not Detected 3.7 Not Detected
1,1-Dichloroethane 1.0 Not Detected 4.3 Not Detected
2-Butanone (Methyl Ethyl Ketone) 4.2 Not Detected 12 Not Detected cis-1,2-Dichloroethene 1.0 Not Detected 4.2 Not Detected Tetrahydrofuran 1.0 Not Detected 3.1 Not Detected
Chloroform 1.0 1.1 5.2 5.3
1,1,1-Trichloroethane 1.0 Not Detected 5.8 Not Detected Cyclohexane 1.0 Not Detected 3.6 Not Detected
Carbon Tetrachloride 1.0 Not Detected 6.6 Not Detected
2,2,4-Trimethylpentane 1.0 33 4.9 160
Benzene 1.0 Not Detected 3.4 Not Detected
1,2-Dichloroethane 1.0 Not Detected 4.3 Not Detected
Heptane 1.0 Not Detected 4.3 Not Detected
Trichloroethene 1.0 Not Detected 5.7 Not Detected
1,2-Dichloropropane 1.0 Not Detected 4.9 Not Detected
1,4-Dioxane 4.2 Not Detected 15 Not Detected
Bromodichloromethane 1.0 Not Detected 7.1 Not Detected
cis-1,3-Dichloropropene 1.0 Not Detected 4.8 Not Detected 4-Methyl-2-pentanone 1.0 Not Detected 4.3 Not Detected
Toluene 1.0 Not Detected 4.0 Not Detected
trans-1,3-Dichloropropene 1.0 Not Detected 4.8 Not Detected 1,1,2-Trichloroethane 1.0 Not Detected 5.8 Not Detected Tetrachloroethene 1.0 16 7.2 110
2-Hexanone 4.2 Not Detected 17 Not Detected

Page 10 of 25 ends

Page 11 of 25 ends

Client Sample ID: VP-4-20210813
Lab ID#: 2108316B-13A
EPA METHOD TO-15 GC/MS FULL SCAN
File Name: 3081717
Dil. Factor: 1.99
Date of Collection: 8/13/21 12:01:00
Date of Analysis: 8/17/21 06:50 PM
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 1.0 Not Detected 4.9 Not Detected
Freon 114 1.0 Not Detected 7.0 Not Detected
Chloromethane 10 Not Detected 20 Not Detected
Vinyl Chloride 1.0 Not Detected 2.5 Not Detected
1,3-Butadiene 1.0 Not Detected 2.2 Not Detected
Bromomethane 10 Not Detected 39 Not Detected
Chloroethane 4.0 Not Detected 10 Not Detected
Freon 11 1.0 Not Detected 5.6 Not Detected
Ethanol 10 22 19 41
Freon 113 1.0 Not Detected 7.6 Not Detected
1,1-Dichloroethene 1.0 Not Detected 3.9 Not Detected
Acetone 10 14 24 34
2-Propanol 4.0 34 9.8 84
Carbon Disulfide 4.0 Not Detected 12 Not Detected
3-Chloropropene 4.0 Not Detected 12 Not Detected
Methylene Chloride 10 Not Detected 34 Not Detected
Methyl tert-butyl ether 4.0 Not Detected 14 Not Detected trans-1,2-Dichloroethene 1.0 Not Detected 3.9 Not Detected Hexane 1.0 Not Detected 3.5 Not Detected
1,1-Dichloroethane 1.0 Not Detected 4.0 Not Detected
2-Butanone (Methyl Ethyl Ketone) 4.0 Not Detected 12 Not Detected cis-1,2-Dichloroethene 1.0 Not Detected 3.9 Not Detected Tetrahydrofuran 1.0 Not Detected 2.9 Not Detected
Chloroform 1.0 Not Detected 4.8 Not Detected
1,1,1-Trichloroethane 1.0 Not Detected 5.4 Not Detected Cyclohexane 1.0 Not Detected 3.4 Not Detected
Carbon Tetrachloride 1.0 Not Detected 6.3 Not Detected
2,2,4-Trimethylpentane 1.0 Not Detected 4.6 Not Detected Benzene 1.0 Not Detected 3.2 Not Detected
1,2-Dichloroethane 1.0 Not Detected 4.0 Not Detected
Heptane 1.0 Not Detected 4.1 Not Detected
Trichloroethene 1.0 Not Detected 5.3 Not Detected
1,2-Dichloropropane 1.0 Not Detected 4.6 Not Detected
1,4-Dioxane 4.0 Not Detected 14 Not Detected
Bromodichloromethane 1.0 Not Detected 6.7 Not Detected
cis-1,3-Dichloropropene 1.0 Not Detected 4.5 Not Detected 4-Methyl-2-pentanone 1.0 Not Detected 4.1 Not Detected
Toluene 1.0 Not Detected 3.7 Not Detected
trans-1,3-Dichloropropene 1.0 Not Detected 4.5 Not Detected 1,1,2-Trichloroethane 1.0 Not Detected 5.4 Not Detected Tetrachloroethene 1.0 44 6.7 300
2-Hexanone 4.0 Not Detected 16 Not Detected

Page 12 of 25 ends

Page 13 of 25 ends

Client Sample ID: VP-5-20210813
Lab ID#: 2108316B-14A
EPA METHOD TO-15 GC/MS FULL SCAN
File Name: 3081718
Dil. Factor: 1.98
Date of Collection: 8/13/21 13:11:00
Date of Analysis: 8/17/21 07:19 PM
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.99 Not Detected 4.9 Not Detected
Freon 114 0.99 Not Detected 6.9 Not Detected
Chloromethane 9.9 Not Detected 20 Not Detected
Vinyl Chloride 0.99 Not Detected 2.5 Not Detected
1,3-Butadiene 0.99 Not Detected 2.2 Not Detected
Bromomethane 9.9 Not Detected 38 Not Detected
Chloroethane 4.0 Not Detected 10 Not Detected
Freon 11 0.99 Not Detected 5.6 Not Detected
Ethanol 9.9 16 19 30
Freon 113 0.99 Not Detected 7.6 Not Detected
1,1-Dichloroethene 0.99 Not Detected 3.9 Not Detected
Acetone 9.9 20 24 46
2-Propanol 4.0 17 9.7 41
Carbon Disulfide 4.0 Not Detected 12 Not Detected
3-Chloropropene 4.0 Not Detected 12 Not Detected
Methylene Chloride 9.9 Not Detected 34 Not Detected
Methyl tert-butyl ether 4.0 Not Detected 14 Not Detected trans-1,2-Dichloroethene 0.99 Not Detected 3.9 Not Detected Hexane 0.99 Not Detected 3.5 Not Detected
1,1-Dichloroethane 0.99 Not Detected 4.0 Not Detected
2-Butanone (Methyl Ethyl Ketone) 4.0 Not Detected 12 Not Detected cis-1,2-Dichloroethene 0.99 Not Detected 3.9 Not Detected Tetrahydrofuran 0.99 Not Detected 2.9 Not Detected
Chloroform 0.99 Not Detected 4.8 Not Detected
1,1,1-Trichloroethane 0.99 Not Detected 5.4 Not Detected Cyclohexane 0.99 Not Detected 3.4 Not Detected
Carbon Tetrachloride 0.99 Not Detected 6.2 Not Detected 2,2,4-Trimethylpentane 0.99 Not Detected 4.6 Not Detected Benzene 0.99 Not Detected 3.2 Not Detected
1,2-Dichloroethane 0.99 Not Detected 4.0 Not Detected
Heptane 0.99 Not Detected 4.0 Not Detected
Trichloroethene 0.99 Not Detected 5.3 Not Detected
1,2-Dichloropropane 0.99 Not Detected 4.6 Not Detected
1,4-Dioxane 4.0 Not Detected 14 Not Detected
Bromodichloromethane 0.99 Not Detected 6.6 Not Detected cis-1,3-Dichloropropene 0.99 Not Detected 4.5 Not Detected 4-Methyl-2-pentanone 0.99 Not Detected 4.0 Not Detected Toluene 0.99 Not Detected 3.7 Not Detected
trans-1,3-Dichloropropene 0.99 Not Detected 4.5 Not Detected 1,1,2-Trichloroethane 0.99 Not Detected 5.4 Not Detected Tetrachloroethene 0.99 11 6.7 76
2-Hexanone 4.0 Not Detected 16 Not Detected

Page 14 of 25 ends

Page 15 of 25 ends

Client Sample ID: DUP-VP-20210813
Lab ID#: 2108316B-15A
EPA METHOD TO-15 GC/MS FULL SCAN
File Name: 3081719
Dil. Factor: 1.96
Date of Collection: 8/13/21 13:11:00
Date of Analysis: 8/17/21 07:48 PM
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.98 Not Detected 4.8 Not Detected
Freon 114 0.98 Not Detected 6.8 Not Detected
Chloromethane 9.8 Not Detected 20 Not Detected
Vinyl Chloride 0.98 Not Detected 2.5 Not Detected
1,3-Butadiene 0.98 Not Detected 2.2 Not Detected
Bromomethane 9.8 Not Detected 38 Not Detected
Chloroethane 3.9 Not Detected 10 Not Detected
Freon 11 0.98 Not Detected 5.5 Not Detected
Ethanol 9.8 19 18 36
Freon 113 0.98 Not Detected 7.5 Not Detected
1,1-Dichloroethene 0.98 Not Detected 3.9 Not Detected
Acetone 9.8 23 23 55
2-Propanol 3.9 22 9.6 55
Carbon Disulfide 3.9 Not Detected 12 Not Detected
3-Chloropropene 3.9 Not Detected 12 Not Detected
Methylene Chloride 9.8 Not Detected 34 Not Detected
Methyl tert-butyl ether 3.9 Not Detected 14 Not Detected trans-1,2-Dichloroethene 0.98 Not Detected 3.9 Not Detected Hexane 0.98 Not Detected 3.4 Not Detected
1,1-Dichloroethane 0.98 Not Detected 4.0 Not Detected
2-Butanone (Methyl Ethyl Ketone) 3.9 Not Detected 12 Not Detected cis-1,2-Dichloroethene 0.98 Not Detected 3.9 Not Detected Tetrahydrofuran 0.98 Not Detected 2.9 Not Detected
Chloroform 0.98 Not Detected 4.8 Not Detected
1,1,1-Trichloroethane 0.98 Not Detected 5.3 Not Detected Cyclohexane 0.98 Not Detected 3.4 Not Detected
Carbon Tetrachloride 0.98 Not Detected 6.2 Not Detected 2,2,4-Trimethylpentane 0.98 Not Detected 4.6 Not Detected Benzene 0.98 Not Detected 3.1 Not Detected
1,2-Dichloroethane 0.98 Not Detected 4.0 Not Detected
Heptane 0.98 Not Detected 4.0 Not Detected
Trichloroethene 0.98 Not Detected 5.3 Not Detected
1,2-Dichloropropane 0.98 Not Detected 4.5 Not Detected
1,4-Dioxane 3.9 Not Detected 14 Not Detected
Bromodichloromethane 0.98 Not Detected 6.6 Not Detected cis-1,3-Dichloropropene 0.98 Not Detected 4.4 Not Detected 4-Methyl-2-pentanone 0.98 Not Detected 4.0 Not Detected Toluene 0.98 Not Detected 3.7 Not Detected
trans-1,3-Dichloropropene 0.98 Not Detected 4.4 Not Detected 1,1,2-Trichloroethane 0.98 Not Detected 5.3 Not Detected Tetrachloroethene 0.98 10 6.6 69
2-Hexanone 3.9 Not Detected 16 Not Detected

Page 16 of 25 ends

Page 17 of 25 ends

Client Sample ID: Lab Blank
Lab ID#: 2108316B-16A
EPA METHOD TO-15 GC/MS FULL SCAN
File Name: 3081705
Dil. Factor: 1.00
Date of Collection: NA
Date of Analysis: 8/17/21 11:30 AM
Compound (ppbv) (ppbv) (ug/m3) (ug/m3)
Rpt. Limit Amount Rpt. Limit Amount
Freon 12 0.50 Not Detected 2.5 Not Detected
Freon 114 0.50 Not Detected 3.5 Not Detected
Chloromethane 5.0 Not Detected 10 Not Detected
Vinyl Chloride 0.50 Not Detected 1.3 Not Detected
1,3-Butadiene 0.50 Not Detected 1.1 Not Detected
Bromomethane 5.0 Not Detected 19 Not Detected
Chloroethane 2.0 Not Detected 5.3 Not Detected
Freon 11 0.50 Not Detected 2.8 Not Detected
Ethanol 5.0 Not Detected 9.4 Not Detected
Freon 113 0.50 Not Detected 3.8 Not Detected
1,1-Dichloroethene 0.50 Not Detected 2.0 Not Detected
Acetone 5.0 Not Detected 12 Not Detected
2-Propanol 2.0 Not Detected 4.9 Not Detected
Carbon Disulfide 2.0 Not Detected 6.2 Not Detected
3-Chloropropene 2.0 Not Detected 6.3 Not Detected
Methylene Chloride 5.0 Not Detected 17 Not Detected
Methyl tert-butyl ether 2.0 Not Detected 7.2 Not Detected trans-1,2-Dichloroethene 0.50 Not Detected 2.0 Not Detected Hexane 0.50 Not Detected 1.8 Not Detected
1,1-Dichloroethane 0.50 Not Detected 2.0 Not Detected
2-Butanone (Methyl Ethyl Ketone) 2.0 Not Detected 5.9 Not Detected cis-1,2-Dichloroethene 0.50 Not Detected 2.0 Not Detected Tetrahydrofuran 0.50 Not Detected 1.5 Not Detected
Chloroform 0.50 Not Detected 2.4 Not Detected
1,1,1-Trichloroethane 0.50 Not Detected 2.7 Not Detected Cyclohexane 0.50 Not Detected 1.7 Not Detected
Carbon Tetrachloride 0.50 Not Detected 3.1 Not Detected 2,2,4-Trimethylpentane 0.50 Not Detected 2.3 Not Detected Benzene 0.50 Not Detected 1.6 Not Detected
1,2-Dichloroethane 0.50 Not Detected 2.0 Not Detected
Heptane 0.50 Not Detected 2.0 Not Detected
Trichloroethene 0.50 Not Detected 2.7 Not Detected
1,2-Dichloropropane 0.50 Not Detected 2.3 Not Detected
1,4-Dioxane 2.0 Not Detected 7.2 Not Detected
Bromodichloromethane 0.50 Not Detected 3.4 Not Detected cis-1,3-Dichloropropene 0.50 Not Detected 2.3 Not Detected 4-Methyl-2-pentanone 0.50 Not Detected 2.0 Not Detected Toluene 0.50 Not Detected 1.9 Not Detected
trans-1,3-Dichloropropene 0.50 Not Detected 2.3 Not Detected 1,1,2-Trichloroethane 0.50 Not Detected 2.7 Not Detected Tetrachloroethene 0.50 Not Detected 3.4 Not Detected
2-Hexanone 2.0 Not Detected 8.2 Not Detected

Page 18 of 25 ends

Page 19 of 25 ends

Client Sample ID: CCV
Lab ID#: 2108316B-17A
EPA METHOD TO-15 GC/MS FULL SCAN
File Name: 3081702
Dil. Factor: 1.00
Date of Collection: NA
Date of Analysis: 8/17/21 09:55 AM
Compound %Recovery
Freon 12 98
Freon 114 98
Chloromethane 94
Vinyl Chloride 88
1,3-Butadiene 79
Bromomethane 98
Chloroethane 96
Freon 11 96
Ethanol 90
Freon 113 95
1,1-Dichloroethene 92
Acetone 99
2-Propanol 97
Carbon Disulfide 100
3-Chloropropene 94
Methylene Chloride 99
Methyl tert-butyl ether 97
trans-1,2-Dichloroethene 97
Hexane 94
1,1-Dichloroethane 94
2-Butanone (Methyl Ethyl Ketone) 99
cis-1,2-Dichloroethene 96
Tetrahydrofuran 91
Chloroform 96
1,1,1-Trichloroethane 96
Cyclohexane 94
Carbon Tetrachloride 101
2,2,4-Trimethylpentane 96
Benzene 96
1,2-Dichloroethane 97
Heptane 97
Trichloroethene 96
1,2-Dichloropropane 95
1,4-Dioxane 97
Bromodichloromethane 96
cis-1,3-Dichloropropene 96
4-Methyl-2-pentanone 92
Toluene 98
trans-1,3-Dichloropropene 96
1,1,2-Trichloroethane 97
Tetrachloroethene 97
2-Hexanone 97

Page 20 of 25 ends

Client Sample ID: CCV
Lab ID#: 2108316B-17A
EPA METHOD TO-15 GC/MS FULL SCAN
File Name: 3081702
Dil. Factor: 1.00
Date of Collection: NA
Date of Analysis: 8/17/21 09:55 AM
Compound %Recovery
Dibromochloromethane 99
1,2-Dibromoethane (EDB) 96
Chlorobenzene 96
Ethyl Benzene 98
m,p-Xylene 97
o-Xylene 98
Styrene 98
Bromoform 98
Cumene 98
1,1,2,2-Tetrachloroethane 96
Propylbenzene 97
4-Ethyltoluene 99
1,3,5-Trimethylbenzene 95
1,2,4-Trimethylbenzene 98
1,3-Dichlorobenzene 97
1,4-Dichlorobenzene 96
alpha-Chlorotoluene 97
1,2-Dichlorobenzene 95
1,2,4-Trichlorobenzene 80
Hexachlorobutadiene 82
Container Type: NA - Not Applicable
Surrogates %Recovery Limits
Method
Toluene-d8 100 70-130
1,2-Dichloroethane-d4 98 70-130
4-Bromofluorobenzene 102 70-130

Page 21 of 25 ends

Client Sample ID: LCS
Lab ID#: 2108316B-18A
EPA METHOD TO-15 GC/MS FULL SCAN
File Name: 3081703
Dil. Factor: 1.00
Date of Collection: NA
Date of Analysis: 8/17/21 10:23 AM
Compound %Recovery Limits
Method
Freon 12 95 70-130
Freon 114 95 70-130
Chloromethane 91 70-130
Vinyl Chloride 85 70-130
1,3-Butadiene 76 70-130
Bromomethane 92 70-130
Chloroethane 96 70-130
Freon 11 93 70-130
Ethanol 73 70-130
Freon 113 94 70-130
1,1-Dichloroethene 94 70-130
Acetone 93 70-130
2-Propanol 98 70-130
Carbon Disulfide 97 70-130
3-Chloropropene 91 70-130
Methylene Chloride 93 70-130
Methyl tert-butyl ether 95 70-130
trans-1,2-Dichloroethene 93 70-130
Hexane 94 70-130
1,1-Dichloroethane 91 70-130
2-Butanone (Methyl Ethyl Ketone) 93 70-130
cis-1,2-Dichloroethene 95 70-130
Tetrahydrofuran 88 70-130
Chloroform 93 70-130
1,1,1-Trichloroethane 94 70-130
Cyclohexane 93 70-130
Carbon Tetrachloride 99 70-130
2,2,4-Trimethylpentane 93 70-130
Benzene 93 70-130
1,2-Dichloroethane 94 70-130
Heptane 105 70-130
Trichloroethene 95 70-130
1,2-Dichloropropane 92 70-130
1,4-Dioxane 86 70-130
Bromodichloromethane 94 70-130
cis-1,3-Dichloropropene 94 70-130
4-Methyl-2-pentanone 84 70-130
Toluene 94 70-130
trans-1,3-Dichloropropene 95 70-130
1,1,2-Trichloroethane 95 70-130
Tetrachloroethene 96 70-130
2-Hexanone 79 70-130

Page 22 of 25 ends

Client Sample ID: LCS
Lab ID#: 2108316B-18A
EPA METHOD TO-15 GC/MS FULL SCAN
File Name: 3081703
Dil. Factor: 1.00
Date of Collection: NA
Date of Analysis: 8/17/21 10:23 AM
Compound %Recovery Limits
Method
Dibromochloromethane 97 70-130
1,2-Dibromoethane (EDB) 96 70-130
Chlorobenzene 95 70-130
Ethyl Benzene 96 70-130
m,p-Xylene 99 70-130
o-Xylene 97 70-130
Styrene 96 70-130
Bromoform 98 70-130
Cumene 96 70-130
1,1,2,2-Tetrachloroethane 95 70-130
Propylbenzene 96 70-130
4-Ethyltoluene 100 70-130
1,3,5-Trimethylbenzene 94 70-130
1,2,4-Trimethylbenzene 98 70-130
1,3-Dichlorobenzene 96 70-130
1,4-Dichlorobenzene 95 70-130
alpha-Chlorotoluene 94 70-130
1,2-Dichlorobenzene 94 70-130
1,2,4-Trichlorobenzene 94 70-130
Hexachlorobutadiene 99 70-130
Container Type: NA - Not Applicable
Surrogates %Recovery Limits
Method
Toluene-d8 100 70-130
1,2-Dichloroethane-d4 99 70-130
4-Bromofluorobenzene 102 70-130

Page 23 of 25 ends

Client Sample ID: LCSD
Lab ID#: 2108316B-18AA
EPA METHOD TO-15 GC/MS FULL SCAN
File Name: 3081704
Dil. Factor: 1.00
Date of Collection: NA
Date of Analysis: 8/17/21 10:51 AM
Compound %Recovery Limits
Method
Freon 12 94 70-130
Freon 114 93 70-130
Chloromethane 90 70-130
Vinyl Chloride 84 70-130
1,3-Butadiene 76 70-130
Bromomethane 90 70-130
Chloroethane 93 70-130
Freon 11 92 70-130
Ethanol 74 70-130
Freon 113 93 70-130
1,1-Dichloroethene 92 70-130
Acetone 92 70-130
2-Propanol 95 70-130
Carbon Disulfide 96 70-130
3-Chloropropene 91 70-130
Methylene Chloride 93 70-130
Methyl tert-butyl ether 95 70-130
trans-1,2-Dichloroethene 93 70-130
Hexane 93 70-130
1,1-Dichloroethane 90 70-130
2-Butanone (Methyl Ethyl Ketone) 91 70-130
cis-1,2-Dichloroethene 94 70-130
Tetrahydrofuran 88 70-130
Chloroform 92 70-130
1,1,1-Trichloroethane 93 70-130
Cyclohexane 92 70-130
Carbon Tetrachloride 98 70-130
2,2,4-Trimethylpentane 92 70-130
Benzene 94 70-130
1,2-Dichloroethane 94 70-130
Heptane 94 70-130
Trichloroethene 95 70-130
1,2-Dichloropropane 93 70-130
1,4-Dioxane 86 70-130
Bromodichloromethane 94 70-130
cis-1,3-Dichloropropene 96 70-130
4-Methyl-2-pentanone 85 70-130
Toluene 94 70-130
trans-1,3-Dichloropropene 94 70-130
1,1,2-Trichloroethane 94 70-130
Tetrachloroethene 96 70-130
2-Hexanone 79 70-130

Page 24 of 25 ends

Client Sample ID: LCSD
Lab ID#: 2108316B-18AA
EPA METHOD TO-15 GC/MS FULL SCAN
File Name: 3081704
Dil. Factor: 1.00
Date of Collection: NA
Date of Analysis: 8/17/21 10:51 AM
Compound %Recovery Limits
Method
Dibromochloromethane 98 70-130
1,2-Dibromoethane (EDB) 95 70-130
Chlorobenzene 95 70-130
Ethyl Benzene 97 70-130
m,p-Xylene 98 70-130
o-Xylene 97 70-130
Styrene 95 70-130
Bromoform 98 70-130
Cumene 96 70-130
1,1,2,2-Tetrachloroethane 95 70-130
Propylbenzene 96 70-130
4-Ethyltoluene 96 70-130
1,3,5-Trimethylbenzene 96 70-130
1,2,4-Trimethylbenzene 99 70-130
1,3-Dichlorobenzene 97 70-130
1,4-Dichlorobenzene 97 70-130
alpha-Chlorotoluene 96 70-130
1,2-Dichlorobenzene 96 70-130
1,2,4-Trichlorobenzene 103 70-130
Hexachlorobutadiene 109 70-130
Container Type: NA - Not Applicable
Surrogates %Recovery Limits
Method
Toluene-d8 101 70-130
1,2-Dichloroethane-d4 97 70-130
4-Bromofluorobenzene 101 70-130

Page 25 of 25 ends

8/21/2021
Ms. Laura Foot
GeoSyntec Consultants
3043 Gold Canal Drive, Suite 100
Rancho Cordova CA 95670
Project Name: Del Paso Blvd
Project #: SAC299
Dear Ms. Laura Foot
The following report includes the data for the above referenced project for sample(s) received on 8/13/2021 at Eurofins Air Toxics LLC.

The data and associated QC analyzed by Modified ASTM D-1946 are compliant with the project requirements or laboratory criteria with the exception of the deviations noted in the attached case narrative.

Regards,
Monica Tran
Project Manager
Workorder #: 2108316C

Page 1 of 15 ends

Ms. Laura Foot
GeoSyntec Consultants
3043 Gold Canal Drive, Suite 100
Rancho Cordova, CA 95670
WORK ORDER #: 2108316C
CLIENT: BILL TO:

PHONE:

Ms. Laura Foot
GeoSyntec Consultants
3043 Gold Canal Drive, Suite 100
Rancho Cordova, CA 95670
916-637-8338
08/13/2021
DATE COMPLETED: 08/21/2021
P.O. # 100028804
PROJECT # SAC299 Del Paso Blvd
Work Order Summary
FAX:

DATE RECEIVED: CONTACT: Monica Tran
FRACTION # NAME TEST VAC./PRES.

RECEIPT

PRESSURE
FINAL
10A VP-1-20210813 Modified ASTM D-1946 4.9 "Hg 9.8 psi
11A VP-2-20210813 Modified ASTM D-1946 4.7 "Hg 10.1 psi 12A VP-3-20210813 Modified ASTM D-1946 6.3 "Hg 9.8 psi
13A VP-4-20210813 Modified ASTM D-1946 4.7 "Hg 10 psi
14A VP-5-20210813 Modified ASTM D-1946 4.5 "Hg 10.1 psi 15A DUP-VP-20210813 Modified ASTM D-1946 4.5 "Hg 9.8 psi 16A Lab Blank Modified ASTM D-1946 NA NA
17A CCV Modified ASTM D-1946 NA NA
18A LCS Modified ASTM D-1946 NA NA
18AA LCSD Modified ASTM D-1946 NA NA
CERTIFIED BY:

Technical Director
DATE:
08/21/21

Page 2 of 15 ends

LABORATORY NARRATIVE
Modified ASTM D-1946
GeoSyntec Consultants
Workorder# 2108316C
Six 1 Liter Summa Canister samples were received on August 13, 2021. The laboratory performed analysis via Modified ASTM Method D-1946 for Helium in air using GC/TCD. The method involves direct injection of 1.0 mL of sample.

Method modifications taken to run these samples are summarized in the table below. Specific project requirements may over-ride the EATL modifications.

Requirement ASTM D-1946 ATL Modifications
Calibration A single point
calibration is performed
using a reference
standard closely
matching the
composition of the
unknown.

A minimum of 5-point calibration curve is performed.

Quantitation is based on average Response Factor.

Reference Standard The composition of any
reference standard must
be known to within

0.01 mol % for any
component.

The standards used by ATL are blended to a >/= 95%
accuracy.

Sample Injection Volume Components whose
concentrations are in
excess of 5 % should
not be analyzed by
using sample volumes
greater than 0.5 mL.

The sample container is connected directly to a fixed
volume sample loop of 1.0 mL on the GC. Linear range is defined by the calibration curve. Bags are loaded by
vacuum.

Normalization Normalize the mole
percent values by
multiplying each value
by 100 and dividing by
the sum of the original
values. The sum of the
original values should
not differ from 100%
by more than 1.0%.

Results are not normalized. The sum of the reported
values can differ from 100% by as much as 15%, either
due to analytical variability or an unusual sample matrix.

Precision Precision requirements
established at each
concentration level.

Duplicates should agree within 25% RPD for detections > 5 X's the RL.

Receiving Notes
There were no receiving discrepancies.

There were no analytical discrepancies.

Analytical Notes

Page 3 of 15 ends

Seven qualifiers may have been used on the data analysis sheets and indicate as follows:

B - Compound present in laboratory blank greater than reporting limit.

J - Estimated value.

E - Exceeds instrument calibration range.

S - Saturated peak.

Q - Exceeds quality control limits.

U - Compound analyzed for but not detected above the detection limit.

M - Reported value may be biased due to apparent matrix interferences.

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NATURAL GAS ANALYSIS BY MODIFIED ASTM D-1946
Summary of Detected Compounds
Client Sample ID: VP-1-20210813
Lab ID#: 2108316C-10A
No Detections Were Found.

Client Sample ID: VP-2-20210813
Lab ID#: 2108316C-11A
Compound (%) (%)
Rpt. Limit Amount
Helium 0.10 0.41
Client Sample ID: VP-3-20210813
Lab ID#: 2108316C-12A
No Detections Were Found.

Client Sample ID: VP-4-20210813
Lab ID#: 2108316C-13A
No Detections Were Found.

Client Sample ID: VP-5-20210813
Lab ID#: 2108316C-14A
Compound (%) (%)
Rpt. Limit Amount
Helium 0.099 2.3
Client Sample ID: DUP-VP-20210813
Lab ID#: 2108316C-15A
Compound (%) (%)
Rpt. Limit Amount
Helium 0.098 3.9

Page 5 of 15 ends

Client Sample ID: VP-1-20210813
Lab ID#: 2108316C-10A
NATURAL GAS ANALYSIS BY MODIFIED ASTM D-1946
File Name: 10081920c
Dil. Factor: 1.99
Date of Collection: 8/13/21 10:50:00 AM
Date of Analysis: 8/19/21 07:20 PM
Compound (%) (%)
Rpt. Limit Amount
Helium 0.10 Not Detected
Container Type: 1 Liter Summa Canister

Page 6 of 15 ends

Client Sample ID: VP-2-20210813
Lab ID#: 2108316C-11A
NATURAL GAS ANALYSIS BY MODIFIED ASTM D-1946
File Name: 10081921c
Dil. Factor: 2.00
Date of Collection: 8/13/21 9:20:00 AM
Date of Analysis: 8/19/21 07:43 PM
Compound (%) (%)
Rpt. Limit Amount
Helium 0.10 0.41
Container Type: 1 Liter Summa Canister

Page 7 of 15 ends

Client Sample ID: VP-3-20210813
Lab ID#: 2108316C-12A
NATURAL GAS ANALYSIS BY MODIFIED ASTM D-1946
File Name: 10081922c
Dil. Factor: 2.11
Date of Collection: 8/13/21 2:15:00 PM
Date of Analysis: 8/19/21 08:24 PM
Compound (%) (%)
Rpt. Limit Amount
Helium 0.10 Not Detected
Container Type: 1 Liter Summa Canister

Page 8 of 15 ends

Client Sample ID: VP-4-20210813
Lab ID#: 2108316C-13A
NATURAL GAS ANALYSIS BY MODIFIED ASTM D-1946
File Name: 10081923c
Dil. Factor: 1.99
Date of Collection: 8/13/21 12:01:00 PM
Date of Analysis: 8/19/21 08:47 PM
Compound (%) (%)
Rpt. Limit Amount
Helium 0.10 Not Detected
Container Type: 1 Liter Summa Canister

Page 9 of 15 ends

Client Sample ID: VP-5-20210813
Lab ID#: 2108316C-14A
NATURAL GAS ANALYSIS BY MODIFIED ASTM D-1946
File Name: 10081924c
Dil. Factor: 1.98
Date of Collection: 8/13/21 1:11:00 PM
Date of Analysis: 8/19/21 09:10 PM
Compound (%) (%)
Rpt. Limit Amount
Helium 0.099 2.3
Container Type: 1 Liter Summa Canister

Page 10 of 15 ends

Client Sample ID: DUP-VP-20210813
Lab ID#: 2108316C-15A
NATURAL GAS ANALYSIS BY MODIFIED ASTM D-1946
File Name: 10081925c
Dil. Factor: 1.96
Date of Collection: 8/13/21 1:11:00 PM
Date of Analysis: 8/19/21 09:33 PM
Compound (%) (%)
Rpt. Limit Amount
Helium 0.098 3.9
Container Type: 1 Liter Summa Canister

Page 11 of 15 ends

Client Sample ID: Lab Blank
Lab ID#: 2108316C-16A
NATURAL GAS ANALYSIS BY MODIFIED ASTM D-1946
File Name: 10081904c
Dil. Factor: 1.00
Date of Collection: NA
Date of Analysis: 8/19/21 12:04 PM
Compound (%) (%)
Rpt. Limit Amount
Helium 0.050 Not Detected
Container Type: NA - Not Applicable

Page 12 of 15 ends

Client Sample ID: CCV
Lab ID#: 2108316C-17A
NATURAL GAS ANALYSIS BY MODIFIED ASTM D-1946
File Name: 10081901c
Dil. Factor: 1.00
Date of Collection: NA
Date of Analysis: 8/19/21 10:44 AM
Compound %Recovery
Helium 98
Container Type: NA - Not Applicable

Page 13 of 15 ends

Client Sample ID: LCS
Lab ID#: 2108316C-18A
NATURAL GAS ANALYSIS BY MODIFIED ASTM D-1946
File Name: 10081902c
Dil. Factor: 1.00
Date of Collection: NA
Date of Analysis: 8/19/21 11:13 AM
Compound %Recovery Limits
Method
Helium 111 85-115
Container Type: NA - Not Applicable

Page 14 of 15 ends

Client Sample ID: LCSD
Lab ID#: 2108316C-18AA
NATURAL GAS ANALYSIS BY MODIFIED ASTM D-1946
File Name: 10081903c
Dil. Factor: 1.00
Date of Collection: NA
Date of Analysis: 8/19/21 11:37 AM
Compound %Recovery Limits
Method
Helium 111 85-115
Container Type: NA - Not Applicable

Page 15 of 15 ends

Attachment 2
Vapor Pin Standard Operating Procedures
Standard Operating Procedure
Installation and Extraction
of the Vapor Pin®
Updated March 16, 2018
VAPOR PIN® protected under US Patent # 8,220,347 B2, US 9,291,531 B2 and other patents pending Vapor Pin Enterprises, Inc • 7750 Corporate Blvd., Plain City, Ohio 43064 • (614) 504-6915 • www.vaporpin.com Scope:

This standard operating procedure describes
the installation and extraction of the VAPOR
PIN® for use in sub-slab soil-gas sampling.

Purpose:

The purpose of this procedure is to assure
good quality control in field operations and
uniformity between field personnel in the use
of the VAPOR PIN® for the collection of subslab soil-gas samples or pressure readings.

Equipment Needed:
 Assembled VAPOR PIN® [VAPOR PIN® and
silicone sleeve(Figure 1)]; Because of
sharp edges, gloves are recommended for
sleeve installation;
 Hammer drill;
 5/8-inch (16mm) diameter hammer bit
(hole must be 5/8-inch (16mm) diameter
to ensure seal. It is recommended that
you use the drill guide). (Hilti™ TE-YX
5/8" x 22" (400 mm) #00206514 or
equivalent);
 1½-inch (38mm) diameter hammer bit
(Hilti™ TE-YX 1½" x 23" #00293032 or
equivalent) for flush mount applications;
 ¾-inch (19mm) diameter bottle brush;
 Wet/Dry vacuum with HEPA filter
(optional);
 VAPOR PIN® installation/extraction tool;
 Dead blow hammer;
 VAPOR PIN® flush mount cover, if
desired;
 VAPOR PIN® drilling guide, if desired;
 VAPOR PIN® protective cap; and
 VOC-free hole patching material
(hydraulic cement) and putty knife or
trowel for repairing the hole following the
extraction of the VAPOR PIN®.

Figure 1. Assembled VAPOR PIN®
Installation Procedure:
1) Check for buried obstacles (pipes,
electrical lines, etc.) prior to proceeding.
2) Set up wet/dry vacuum to collect drill
cuttings.
3) If a flush mount installation is required,
drill a 1½-inch (38mm) diameter hole at
least 1¾-inches (45mm) into the slab.

Use of a VAPOR PIN® drilling guide is
recommended.
4) Drill a 5/8-inch (16mm) diameter hole
through the slab and approximately 1-
inch (25mm) into the underlying soil to
form a void. Hole must be 5/8-inch
(16mm) in diameter to ensure seal. It is
recommended that you use the drill
guide.

Standard Operating Procedure
Installation and Removal of the Vapor Pin®
Updated March 16, 2018

Page 2 ends

VAPOR PIN® protected under US Patent # 8,220,347 B2, US 9,291,531 B2 and other patents pending Vapor Pin Enterprises, Inc.
• 7750 Corporate Blvd., Plain City, Ohio 43064 • (614) 504-6915 • www.vaporpin.com 5) Remove the drill bit, brush the hole with
the bottle brush, and remove the loose
cuttings with the vacuum.
6) Place the lower end of VAPOR PIN®
assembly into the drilled hole. Place the
small hole located in the handle of the
installation/extraction tool over the vapor
pin to protect the barb fitting, and tap
the vapor pin into place using a dead
blow hammer (Figure 2). Make sure the
installation/extraction tool is aligned
parallel to the vapor pin to avoid
damaging the barb fitting.

Figure 2. Installing the VAPOR PIN®
During installation, the silicone sleeve will
form a slight bulge between the slab and the
VAPOR PIN® shoulder. Place the protective
cap on VAPOR PIN® to prevent vapor loss
prior to sampling (Figure 3).

Figure 3. Installed VAPOR PIN®
7) For flush mount installations, cover the
vapor pin with a flush mount cover, using
either the plastic cover or the optional
stainless-steel Secure Cover (Figure 4).

Figure 4. Secure Cover Installed
8) Allow 20 minutes or more (consult
applicable guidance for your situation)
for the sub-slab soil-gas conditions to reequilibrate prior to sampling. 9) Remove protective cap and connect
sample tubing to the barb fitting of the
VAPOR PIN®. This connection can be
made using a short piece of TygonTM
tubing to join the VAPOR PIN® with the
Standard Operating Procedure
Installation and Removal of the Vapor Pin®
Updated March 16, 2018

Page 3 ends

VAPOR PIN® protected under US Patent # 8,220,347 B2, US 9,291,531 B2 and other patents pending Vapor Pin Enterprises, Inc.
• 7750 Corporate Blvd., Plain City, Ohio 43064 • (614) 504-6915 • www.vaporpin.com Nylaflow tubing (Figure 5). Put the
Nylaflow tubing as close to the VAPOR
PIN® as possible to minimize contact
between soil gas and TygonTM tubing.

Figure 5. VAPOR PIN® sample connection
10) Conduct leak tests in accordance with
applicable guidance. If the method of
leak testing is not specified, an alternative
can be the use of a water dam and
vacuum pump, as described in SOP Leak
Testing the VAPOR PIN® via Mechanical
Means (Figure 6). For flush-mount
installations, distilled water can be
poured directly into the 1 1/2 inch
(38mm) hole.

Figure 6. Water dam used for leak detection
11) Collect sub-slab soil gas sample or
pressure reading. When finished, replace
the protective cap and flush mount cover
until the next event. If the sampling is
complete, extract the VAPOR PIN®.

Extraction Procedure:
1) Remove the protective cap, and thread
the installation/extraction tool onto the
barrel of the VAPOR PIN® (Figure 7).

Turn the tool clockwise continuously,
don't stop turning, the VAPOR PIN® will
feed into the bottom of the
installation/extraction tool and will
extract from the hole like a wine cork, DO
NOT PULL.
2) Fill the void with hydraulic cement and
smooth with a trowel or putty knife.

Figure 7. Removing the VAPOR PIN®
 Prior to reuse, remove the silicone
sleeve and protective cap and discard.

Decontaminate the VAPOR PIN® in a
hot water and Alconox® wash, then
heat in an oven to a temperature of
265o F (130o C) for 15 to 30 minutes.

For both steps, STAINLESS – ½ hour,
BRASS 8 minutes
Standard Operating Procedure
Installation and Removal of the Vapor Pin®
Updated March 16, 2018

Page 4 ends

Case Closure Summary: 1124 – 1132 Del Paso Blvd, Sacramento I. AGENCY INFORMATION
DATE: May 29, 2009
Agency Name: Sacramento County Environmental Mgmt. Dept. Address: 10590 Armstrong Ave., Suite A City/State/Zip: Sacramento, CA 95826 Phone/email: (916) 875-8467 email: [email protected] Responsible staff person: David Von Aspern Title: Environmental Specialist III II. CASE INFORMATION
Site Facility Name: Budget Cleaners (Former Site of) APN: 275-0165-021 Site Facility Address: 1124 – 1132 Del Paso Blvd., Sacramento CA 95815 RB LUSTIS Case No: Local Case No: RO 1644 LOP Case No: C367 URF file date: 10-29-08 Global ID No. T10000000457
Responsible Parties: Attn: Brad Satterwhite Address: 630 I Street, 2nd Floor Phone Number: 916-440-1399 Sacramento Housing and Redevelopment Agency (SHRA) Sacramento CA 95814

Tank No. Size in Gallons Contents Closed in-Place/Removed? Date 1 No history of onsite tanks

2 III. RELEASE AND SITE CHARACTERIZATION INFORMATION
Cause and type of release: Unknown (Suspected up-gradient off-site source) Site characterization complete? (x)YES ()NO Date approved by oversight agency:

Monitoring Wells Installed? () YES (x) NO Number: Proper screen interval? ()

YES () NO
Highest GW depth below ground surface: Approx. 35 feet Lowest Depth: Approx, 40 feet
Flow Direction: NE
Most Sensitive Current Use: Municipal
Are drinking water wells affected? () YES (x) NO Aquifer name: Sacramento River Basin Is surface water affected? () YES (x) NO Nearest/affected SW name: N/A Off-site beneficial use impacts (addresses/locations): None Report(s) on file? (X) YES () NO Where is report(s) filed? SCEMD Treatment and Disposal of Affected Material
Materials Amount (Include Units) Action (Treatment or Disposal w/Destination) Date Tank No tanks present

Piping No piping treatment or disposal
Free Product
No free product treatment or
disposal
Soil
Approximately 35 gallons of soil
cuttings
Soil contained in 55 gallon drum awaiting disposal at
designated landfill.

April 3, 2009
Groundwater No groundwater treatment or
disposal.

Barrels
One partially full 55 gallon drum
containing soil cuttings. One
partially full 55 gallon drum
Soil and grout contained in 55 gallon drums awaiting
disposal at designated landfill.

April 3, 2009
containing grout.

Case Closure Summary
III. RELEASE AND SITE CHARACTERIZATION INFORMATION (CONTINUED) Maximum Documented Contaminant Concentrations--Before and After Soil (mg/Kg) Water (Pg/L) Soil (mg/Kg) Water (Pg/L)
Contaminant
ź Before After Before After
Contaminant
ź Before After Before After
TPH (Gas)
<1.0 <1.0 <50 <50
Xylene
<0.0050 <0.0050 <0.5 <0.5
TPH (Diesel)
52 52 240 240
Ethylbenzene
<0.0050 <0.0050 <0.5 <0.5
Benzene
<0.0050 <0.0050 <0.5 <0.5
Oil & Grease
Not
analyzed
Not
analyzed
Not
analyzed
Not
analyzed
Toluene
<0.0050 <0.0050 <0.5 <0.5
Cis-1,2-DCE
<0.0050 <0.0050 6.0 6.0
MTBE
<0.0050 <0.0050 <0.5 <0.5
PCE
<0.0050 <0.0050 11.0 11.0
Comments (Depth/Type of Remediation, Mass Balance Calculations, Fate & Transport Results, etc.):

No remedial efforts have been performed at the site. Note that maximum concentrations of TPH-D and TPH-G and VOCs in groundwater found as part of this investigation were from in samples taken were from an off-site boring (B-7) on adjacent RT Property.

IV. CLOSURE
Does completed corrective action protect existing beneficial uses per the Regional Basin Plan? (x) YES () NO Does the completed corrective action protect potential beneficial uses per the Regional Board Basin Plan? (x) YES () NO Does corrective action protect public health for current land use? (x) YES () NO Site management requirements: None
Should corrective action be reviewed if land use changes? () Yes (x) No Monitoring wells Decommissioned: () Yes () No (x) N/A No. Decommissioned: No. Retained:

Fee Title Certification: Pending
GeoTracker Input Verification: Completed
List Enforcement Actions Taken: None
List enforcement actions rescinded: None
V. LOCAL AGENCY REPRESENTATIVE DATA
Name: Mr. Val F. Siebal Title: Director, EMD
Signature: Date:

VI. RWQCB NOTIFICATION
Date Submitted to RB: RB Response:

RWQCB Staff Name: Kathryn Dominic Title: Engineering Geologist Date:

VII. ADDITIONAL COMMENTS, DATA, ETC.
“Human Health Risk Assessment” results:
1124 Del Paso Blvd.CASECLOSURESUMMARY.DOC PAGE 2 OF 2
No Further Action Summary
1124 and 1132 Del Paso Boulevard
LRP Site No. C637
Sacramento, California
May 19, 2009
This summary presents information regarding the nature and extent of Total petroleum Hydrocarbons (TPH) in soil and groundwater, and volatile organic compounds (VOCs) in groundwater for the property located at 1124 Del Paso Boulevard, Sacramento, California (Site). This summary has been prepared by Nichols Consulting Engineers (NCE on behalf of the Sacramento Housing and Redevelopment Agency (SHRA). The Site is bounded by Del Paso Boulevard to the north, Southgate Road to the east, a parking lot and a parcel owned by Regional Transit (RT) to the southwest and residential development to the south, as shown on Plates 1 and 2. One onsite structure exists at the Site that consists of a large building of block masonry, frame and stucco and poured concrete construction on a slab on grade foundation. The Site encompasses approximately 1.34 acres (58,444 square feet) of land and is currently not occupied although there is a vacant structure on the Site currently in the initial stages of tenant improvements.

This summary presents a chronology of site investigation activities and the results of those investigations in Section 1.0. Its qualification as a low-risk groundwater site is provided in Section 2.0. Section 3.0 provides responses to the requirements listed in California Regional Water Quality Control Board’s (CRWQCB) Tri-Regional Board Appendix B checklist.

1.0 CHRONOLOGY
This section provides a chronological summary of previous site investigations and their results.

November, 2006
Phase I ESA Including Limited Phase II
NCE conducted a Phase I Environmental Site Assessment and Limited Subsurface Investigation (Phase I ESA) for SHRA for this property in 2006 the results of which are presented in NCE’s Phase I/II ESA dated November 11, 2008. The ESA indicated that there was a likelihood that at least two historical dry cleaning businesses operated out of the building at this location between approximately 1952 and 1980. These findings were based solely on historical City Directory listings and no independent confirmation of the existence of on-site historical dry cleaning operations was uncovered. Based on these findings, SHRA retained NCE to conduct a limited Phase II investigation consisting of a passive soil gas survey to further evaluate these findings.

April, 2006
Passive Soil Gas Survey
Passive soil gas probes (using EMFLUX technology) were deployed at the 21 sample locations (PSG-1 through PSG-21 [Plate 3]). The results of the investigation are included in NCE’s November 11, 2008 Phase I/II ESA. The probes were installed to a depth of about 12-inches below concrete and/or asphalt paving. The probes were left in place for

Page 2 of 10 ends

approximately 7 days, retrieved and then sent to the analytical laboratory for analysis.

Relative ionic counts associated with chlorinated compounds including tetrachloroethene (PCE), trichloroethene (TCE), chloroform and benzene, toluene, ethylbenzene and xylenes (BTEX) were reported in soil gas at the site. The highest ionic counts of both chlorinated compounds and TPH related volatiles were found at the same probe location (PSG-21) and their relative distribution was similar (Appendix A).

May - June, 2006
Soil and Grab Groundwater Sampling
A subsequent limited subsurface investigation was conducted to evaluate potential onsite releases, confirm soil-gas results, and to evaluate potential off-site releases associated with the adjacent RT (old Regal station) property. The results of the investigation are included in NCE’s November 11, 2008 Phase I/II ESA. Sampling locations are shown on the attached Plates 2 through 6. Eight soil borings (B-1 through B-6, B-8 and B-9) were drilled at locations both inside and outside of the structure. Borings were located in areas that exhibited the highest relative soil-gas readings. Groundwater was collected for analysis from five of the eight on-site borings. The two borings drilled inside the structure met with refusal just below the concrete slab at approximately 3 feet bgs. The results of the subsurface investigation revealed the presence of relatively low levels of total petroleum hydrocarbons (TPH) in soil (maximum concentration of 52 mg/kg TPH-D), and groundwater (maximum concentration of 240 ug/L TPH-D) at the Site. In addition, volatile organic compounds (VOC) were detected in groundwater beneath the site (maximum concentration of 11 ug/L PCE).

On behalf of SHRA, and with access granted to the RT site by RT, NCE drilled and sampled two additional borings (B-7 & B-9) on the RT site. Soil and groundwater samples were collected and analyzed from Boring B-7 although only soil was collected from Boring B-9 which was terminated at 15 feet bgs. This follow-up subsurface investigation also revealed the presence of VOCs and TPH in soil and groundwater beneath the adjacent RT property to the southwest.

Concentrations of TPH-D in groundwater were highest at borings B-4 and B-7 (240 ug/L), located near the southwestern side of the Site, and on the RT property, respectively (Table 1). TPH-D was reported at a lower concentration of 70 micrograms per liter (ug/L) in the groundwater sample collected from boring B-1 located on the eastern side of the Site. TPH-G was only found in groundwater form boring B-7 located on the RT property. TPH-D was reported at concentrations of 1.4 milligrams per liter (mg/Kg), 1.5 mg/Kg, 52 mg/Kg and 3.3 mg/Kg in the soil samples collected from borings B-1, B-2, B-5 and B-6, respectively (Plate 6).

VOC concentrations were highest on the RT property (B-7) where PCE was reported in the groundwater sample at 400 ug/L. PCE was reported in the groundwater samples from boring B-3 and B-4, located on the western portion of the SHRA Site, at concentrations of 11 ug/l and 1.1 ug/L, respectively. The highest levels of cis-1,2-dichloroethene (cis-1,2- DCE) and TCE in groundwater were also reported in boring B-7 (on RT property) at a concentrations of 42 ug/L and 12 ug/L, respectively. With the exception of 6.0 ug/L of cis-1,2 DCE in the groundwater form boring B-8 located along the sewer line in the alley, VOCs were not reported at concentrations above their respective detection limits in any of the groundwater samples in borings east of borings B-3 and B-4.

Page 3 of 10 ends

Based on the northeast groundwater flow direction calculated for the Site vicinity, and the distribution of TPH and VOCs in groundwater and soil, it was postulated that the TPH and VOCs found in the groundwater at the Site may be the result of migration to the Site from an unidentified off-site source to the southwest. Additional collection of grab groundwater samples was advised to support this conclusion including off-site sampling locations on the RT property, and up-gradient of the RT property, in and around the vicinity where the highest VOC concentrations were reported.

January, 2007
Indoor Air Quality Sampling
As requested by SHRA, NCE conducted indoor air quality sampling and analysis at the Site.

Data evaluation was performed by NCE’s teaming partner, LFR Environmental Management & Consulting Engineering (LFR). The air sampling was performed to provide information on whether subsurface VOCs were migrating upward and into the building. The results of the indoor air quality sampling and analysis are presented in LFR’s January 23, 2007 Indoor Air Quality Evaluation letter. In December 2006 NCE collected three indoor samples and one outdoor sample using Summa canisters (IA-1 through IA-3 and IA-R) at the Site (Plate 2).

The outdoor sample was collected on the building’s roof for ambient air quality comparison.

The indoor air samples were collected in locations where the subsurface passive sampling indicated the highest VOC levels.

Freon 11, Freon 12, chloromethane, ethanol, acetone, benzene and toluene were identified in the ambient air at concentrations ranging from 0.62 to 4.2 micrograms per cubic meter (ug/m3
). Freon 11, Freon 12, chloromethane, ethanol, acetone, benzene and toluene were identified in the indoor air at concentrations ranging from 0.57 to 6.2 ug/m3 (Table 2). It was
concluded that their identification in the indoor air most likely represents ambient conditions and not subsurface vapor intrusion. Relatively low concentrations of carbon disulfide, 2- butanone (MEK) and 2-propanol (rubbing alcohol) also identified in the air are likely related to tenant improvement projects observed in the buildings. These three VOCs were not identified in the previous subsurface sampling events. No PCE, TCE, cis-1,2-DCE or Vinyl Chloride were reported in the indoor air samples.

The air sample results were compared to the passive soil gas results. The passive soil gas results identified several chlorinated VOCs which were not identified in the air samples.

Benzene and toluene were the only VOCs identified in the passive soil gas that were also identified in the air sample. However, as previously stated, benzene and toluene in the indoor air are likely related to ambient air and not vapor intrusion.

The air sample results were also screened against established health based air criteria including criteria from the U.S. EPA, California EPA, and the Bay Area Regional Water Quality Control Board. These regulatory agencies each used human health risk based methodology to derive safe air concentrations for workers. With the exception of benzene and chloromethane, the detected indoor air concentrations are significantly below levels considered to be a health concern. The benzene and chloromethane detections indoors are lower than their respective outdoor detections and most likely represent ambient conditions.

Based on the review of the air and subsurface data, vapor intrusion does not appear to be occurring at the Site. The majority of the VOCs detected in groundwater samples were not detected in the indoor samples. As previously stated, Freon 11, Freon 12, chloromethane,

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ethanol, acetone, benzene and toluene were detected in indoor air most likely represent outdoor influences on indoor air quality and not subsurface intrusion. A copy of the LFR report is included in Appendix C.

November 2007
RT Site Sampling - Geocon
In 2007, the Sacramento Regional Transit District (RT) in cooperation with the Business Environmental Resource Center (BERC) retained Geocon Consultants (Geocon) to conduct a Phase II assessment of the RT property immediately west of the subject site. The Geocon results were presented in their November 2007 report titled Phase II Environmental Site Assessment, Sacramento Regional Transit Property, 1100 Del Paso Boulevard, Sacramento County, California. The Geocon investigation consisted of drilling and sampling nine soil borings (DP1 through DP9) on the RT site generally within the boundaries of geophysical anomalies that were previously identified at the site. Four of the borings were advanced to groundwater and groundwater samples were collected for analysis. PCE, TCE and cis 1,2- DCE were detected in each of the four groundwater samples collected with the highest concentrations of each chemical reported in Boring DP9 located near the southwestern boundary of the RT site near Baxter Avenue (Plates 3 through 5). PCE, TCE and cis 1,2- DCE were reported in the groundwater from Boring DP9 at 400, 6.2 and 14 ug/l, respectively.

The Geocon report did not identify the source of the chlorinated solvents found in the groundwater in the site vicinity. TPH compounds including gas, diesel and motor oil were also found in the soil and groundwater at the RT site in the Geocon borings (Plate 6).

The attached Plates 3 through 5 show PCE, TCE and cis 1,2-DCE groundwater concentrations, and interpreted isoconcentration contours, based on existing available data for the RT and Subject Sites. Soil analytical data for both the Site and the adjacent RT property is shown on Plate 6.

April 2009
Additional Phase II Sampling
As requested by SHRA, in April 2009 NCE conducted Additional Phase II Sampling activities at the Site. The primary objectives of the Additional Phase II Sampling activities were to further evaluate and determine if there is a vadose zone source of VOCs on the SHRA Site and further evaluate the distribution of chlorinated solvents in the shallow groundwater beneath the Site. The results of the investigation are included in NCE’s May 19, 2009 Summary Report, Additional Phase II Sampling. Additional Phase II Sampling activities were performed in April 2009 and included the advancement of Geoprobe borings B-11 through B15 (Plate 2). Two borings including B-11 and B-12 were advanced to a maximum depth of 15 feet bgs to evaluate the shallow subsurface soils within selected proposed utility trench alignments. Three borings including B-13, B-14 and B-15 were advanced to a maximum depth of 40 feet bgs to further evaluate and determine if there is a vadose zone source of VOCs on the SHRA Site. An attempt was made to collect a grab groundwater sample at a fourth location (B-16) located in the center of the parking lot between the RT and SHRA sites. Due to unfavorable soil conditions the drilling contractor (Vironex) was not successful

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in advancing B-16 to a depth required to collect a groundwater sample. No soil samples were collected from boring B-16.

A total of 12 soil samples from Geoprobe borings B-11 through B-15 were collected and submitted for VOCs and PAH analysis. Groundwater samples collected from borings B-13 and B-15 were also submitted for VOC analyses. Of the soil samples submitted, none contained VOC or PAHs at concentrations above the laboratory detection limit (Table 1).

The groundwater sample from borings B-13 contained cis 1,2-DCE at a concentration of 0.89 ug/L. Chloromethane, naphthalene, acetone and 2-butanone were also reported in the groundwater sample from B-13 at concentrations of 0.87ug/L, 0.76 ug/L, 13 ug/L and 3.1 ug/L, respectively. No other VOC constituents were reported above their respective reporting limits in the groundwater samples collected from borings B-13 and B-15. The distribution of PCE, TCE and cis 1,2-DCE are shown on Plates 3, 4 and 5, respectively and the results of analytical testing are presented on Table 1. Soil analytical results are presented on Plate 6.

The presence of cis 1,2-DCE in the groundwater at Boring B-13 is consistent with the previous groundwater chemical data collected at the Site and fits well with the interpreted distribution of VOCs in shallow groundwater beneath the Site. The lack of any detectable VOCs in soil beneath the Site, from samples collected during this additional investigation and previous investigations, suggests the lack of a vadose zone source of VOCs on the property.

The data collected during this additional investigation substantiates the previously collected data for the Site and further supports the reasonable conclusion that the VOCs found in the shallow groundwater beneath the Site is from a yet identified up-gradient source located southwest of the Site.

2.0 LOW RISK GROUNDWATER CRITERIA

2.1 The release has been stopped and sources, including free product, have been removed or remediated:

Hazardous substance release mechanisms must be identified, if possible, and the release must be sufficiently abated so as to prevent ongoing pollution.

If the release was from a petroleum underground storage tank, the tank or appurtenant structure that leaked must be repaired or permanently closed per Article 7, Section 2672 of the UST regulations. Free-product shall be removed to the extent practicable per Article 5, Section 2655 of the UST regulations.

Soil that contains sufficient mobile constituents (leachate, vapors, or NAPL), as determined by the site-specific plume characteristics and soil analytical data, to continue to degrade water, or result in a significant threat to human health, should be considered a source.

No on-site source or potential release area(s) have been identified associated with the site. The lack of any detectable VOCs in soil beneath the Site, from samples collected during investigation activities, suggests the lack of a vadose zone source of VOCs on the property. The data collected for the Site substantiates and further supports the reasonable conclusion that the VOCs found in the shallow groundwater beneath the Site is from a yet identified up-gradient source located southwest of the Site.

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2.2 The site has been adequately characterized:

The vertical and lateral extent of the subsurface impact must be defined to the degree that is necessary to evaluate whether the site currently poses, or in the future may pose, a significant threat to human health, water of the State, or other nearby sensitive receptors. The level of detail required at a given site will depend upon the contaminant(s) of concern, the types of potential receptors and exposure pathways, and the proximity of other potential receptors.

It is assumed that subsurface conditions are highly variable and that there is always some uncertainty associated with evaluating data at a site. However, the cost of obtaining additional data must be weighed against the benefit of obtaining that data and the effect the data may have on the certainty of decisions to be made at the site.

The presence or absence of horizontal and vertical conduits that could act as preferential pathways for contaminant migration should be evaluated as a part of the site characterization process. Vertical gradient evaluation may be necessary.

Soil, groundwater and air sampling efforts for the site are summarized below:
x Fifteen soil borings drilled and logged
x Twenty-two soil samples submitted for TPH analyses (eight detections with maximum concentration of 52 mg/Kg TPH-D)
x Thirty-three soil samples submitted for VOC analysis (no detections) x Three soil samples submitted for SVOC analyses (no detections) x Seven on-site groundwater grab samples
o TPH-D detections in three samples (maximum concentration of 240 ug/L)
o No TPH-G or BTEX detections
o VOC detections in four samples (maximum concentration of 11 ug/L PCE)
Considering the amount of Phase II sampling and analysis that has been performed at the site, the lack of any VOC’s detected in the vadose zone soils, the relatively low levels of TPH related impacts in subsurface soils, and the distribution of VOC impacts in groundwater, it is NCE’s opinion that the site itself has been adequately characterized and it is reasonable to conclude that the site is not the source of the VOCs found in the shallow groundwater in the site vicinity.

Laboratory results for groundwater samples collected from borings B-1 and B-2 located on the down gradient portion of the Site were below laboratory detection limits for VOCs. These findings suggest that the downgradient lateral extent of subsurface VOC groundwater impacts has been defined. As the source of the impacts appears to be related to a “yet to be identified up gradient source”, the vertical and crossgradient lateral limits of groundwater related VOC impacts in the site vicinity has not been fully evaluated.

2.3 The contaminant plume is not migrating and chemical concentrations in groundwater are projected to meet water quality objectives through natural attenuation or engineered

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Sacramento City CouncilOctober 7, 2025

Sacramento City Council
October 7, 2025