Appendix G-2. Phase II ESA

Transcription

1 Appendix G-2 Phase II ESA

2 ENVIRONMENTAL MANAGEMENT STRATEGIES, INC. Financially Based, Environmental Solutions March 11, 2016 Mr. Brad Perozzi Managing Director Development TPG Real Estate, LLC 5000 Birch Street, Suite 600 East Tower Newport Beach, California RE: Phase II Environmental Site Assessment Report A-1 Coast Rentals Crenshaw Boulevard and Lomita Boulevard Lomita, California Project Number EMS543 Dear Mr. Perozzi: Environmental Management Strategies, Inc. (EMS) is pleased to present this Phase II Environmental Site Assessment Report (Phase II ESA) for A-1 Coast Rentals located at Crenshaw Boulevard and Lomita Boulevard located in the City of Lomita, California (the Site see attached Figure). The Phase II ESA activities were based on the findings of the Phase I Environmental Site Assessment (Phase I ESA) performed at the Site. This Phase II ESA investigation was performed in general accordance with EMS environmental services proposal dated February 3, EMS was retained by TPG Real Estate, LLC on February 8, 2016 to conduct the Phase II ESA. The property consists of a number of small commercial buildings and support structures that contains an equipment rental yard known as A-1 Coast Rentals. The A-1 Coast Rental yard has a number of addresses including Crenshaw Boulevard and Lomita Boulevard in the City of Lomita, California. The property is L shaped with frontages on both Crenshaw and Lomita Boulevards. Inside the L shape is a Shell gas station that is located on the northeast corner of the intersection of Crenshaw and Lomita Boulevards. On July 21, 2015 EMS finalized a Phase I ESA for the referenced property. The Phase I ESA identified a number of Historical and Recognized Environmental Conditions according to ASTM Standard E titled Standard Practice for Environmental Assessments: Phase I Environmental Site Assessment Process. The Phase I Site inspection revealed a leaking underground storage tank (UST) was removed from the Site and received closure from the Los Angeles Regional Water Quality Control Board (LARWCB) in The Site was also listed as a small quantity generator of hazardous materials and having a landfill or surface impoundment that would be closed as a landfill. The adjacent Shell gasoline station was listed as having been remediated after a gasoline spill and received closure in March The UNOCAL Torrance Tank Farm is currently located across Crenshaw Boulevard to the west of the Site and had a reported leak of Total Petroleum Hydrocarbons (TPH) on June 16, The A-1 Coast Rentals property was listed as an auto wrecking service and nursery in the past. Above ground diesel and gasoline tanks were present during the Phase I site Aston St. Tel (949) Irvine, CA Fax (949)

3 Mr. Brad Perozzi March 11, 2016 Page 2 of 6 inspection along with oils, lubricants, waste oils and filters that are stored on Site. An underground clarifier was identified at the A-1 Coast Rentals property which is used to collect wastewater from the washing of equipment. The Phase I ESA also found that sewage waste was also previously dumped at the Site. Scope of Work On February 22-24, 2016 EMS installed 21 borings to a depth of 15 feet at the Site and collected soil and soil vapor samples. The borings were located in areas that were determined in the Phase I ESA to be suspect areas for potential subsurface contamination. Soil samples were collected from the borings at 5, 10 and 15 feet; the soil samples were screened in the field for potential contaminants, and transported to a State of California Certified Laboratory for chemical analysis. Soil vapor probes were installed in each of the borings at depths of 5 and 15 feet. Pre-Field Activities On February 18, 2016, Anthony Severini with EMS accessed the Site to mark boring locations using white paint. EMS contacted Underground Service Alert (USA) a minimum of 48 hours prior to commencement of field activities to locate subsurface utilities. USA contacted utility owners of record within the Site vicinity and notified them of EMS s intention to conduct a subsurface investigation (USA Ticket No. A ). EMS also contracted Goldak, a subsurface utility clearance company, to perform clearance of each potential borehole location. Boring Installation and Sampling (EST, a subsidiary of EMS) provided the direct-push rig and mobile laboratory required to perform the investigation. EST, under the supervision of EMS advanced four soil borings around the current diesel fuel dispensing area (B-5 to B-8), three around the subsurface clarifier in the equipment maintenance wash bay (B-9 to B-11), one near the aboveground waste oil storage tank (B-12), one near the aboveground gas tank (B-13), one near the Port-a-Potty wash area (B-14) and three around a concrete pad suspected to possibly have been a septic system (B- 16 to B-18). The remaining boring locations were placed throughout the Site for a general evaluation of subsurface conditions (B-1 to B-4, B-14, B-15, B-20 and B-21, see Figure 2 attached). EST used a truck-mounted, GeoProbe direct-push sampling rig to install the borings. EST advanced all borings to a depth of approximately 15 feet (15 ) below ground surface (bgs). The soil borings were advanced using standard direct-push sampling techniques. Soil samples at each location were retrieved from the subsurface in 4-foot long acetate liners. Soil samples were collected at depths of 5, 10 and 15 feet. Soil collected in the acetate liner was cut into approximately 6-inch long sections, sealed on ends with Teflon tape and plastic end caps, labeled (with the date, time, sample identifier, and project name). The remaining soil collected in the acetate liner was field screened for volatile organic compounds (VOCs) using a photoionization detector (PID). The samples were logged in a chain of custody document and transferred to the on-site EST chemist who stored them inside the mobile lab refrigerator. A copy of the chain-of-custody for soil samples is attached. Soil samples B-1, B-2, B-5, B-9, B-10, B-12, B-17 and B-21 at 5 feet, B-7 at 10 and 15 feet and B-11 at 5 and 15 feet were analyzed by EST for Total Petroleum Hydrocarbons as gasoline (TPHg) and VOCs using Environmental Protection Agency (EPA) Method 8260B. Soil samples B-7 and B-9 to B-12 at 5 feet were analyzed by Alpha Scientific Corporation for Total Petroleum Hydrocarbons using EPA Method 8015M Aston St. Tel (949) Irvine, CA Fax (949)

4 Mr. Brad Perozzi March 11, 2016 Page 3 of 6 Soil Gas Probe Installation and Sampling Following soil sample collection, EST constructed temporary soil gas probes within each borehole for the purpose of performing a soil gas survey. Soil gas probes were placed at depths of 5 and 15 feet at all locations. The soil gas investigation activities were conducted in general accordance with the California Department of Toxic Substances Control s (DTSC) Advisory - Active Soil Gas Investigations dated July The soil gas probes were installed using ¼-inch Nylaflow tubing in the subsurface to a depth of 15 feet. A clean and new implant filter was placed on the end of the tubing. Approximately 12 inches of clean, graded (# 3), kiln dried, Lonestar Monterey sand was poured around the sample tip to allow for diffusion of soil vapors and 12 inches of dry bentonite was added above the sand pack. The borehole was filled with hydrated bentonite to the next sampling interval at 5-foot depth and the probe construction process was repeated. The remaining borehole was filled with hydrated bentonite to slightly below grade to perform as a leak proof seal at the surface. Prior to soil gas sample collection, a minimum of 120 minutes was allowed to elapse for soil gas probe construction materials to set and equilibrate with the surrounding formation. Soil gas samples were collected by an EST chemist operating an EST mobile laboratory. EST mobile laboratories are certified under the California Environmental Laboratory Accreditation Program. Purging and sampling was conducted at an extraction rate of approximately 200 milliliters (ml) per minute. Purging was accomplished using a portable sampling pump. Prior to collecting the first soil gas sample during the first sampling event an ambient air sample was collected and analyzed. A shut-in test was also conducted prior to both sampling events, which consists of attaching a magnehelic differential pressure gauge to tubing to ensure there is no pressure drop within the system. A purge volume of three was used at all sampling locations; a single purge volume consists of the filter pack pore volume, gas probe screen volume, and tubing volume. A method and material blank and duplicate quality control samples were collected during the sampling event. During the soil gas sampling a leak test of the probe was performed with 2-propanol placed near and around the sample train. Detection of 2- propanol would indicate the intrusion of ambient air into the sampling train. During the sampling event soil gas samples were collected using a 20 ml syringe and were taken directly to the on-site mobile laboratory for analysis. The soil gas samples collected were analyzed for TPHg and VOCs using EPA method 8260B. Laboratory Analytical s Fifty one soil gas samples including duplicate, equipment and material blanks were collected and analyzed for VOCs and TPHg by EST. Sample results are presented on Table 1. Laboratory analytical reports for soil gas and soil samples are attached. Soil gas sample results presented on Table 1 were compared to adjusted cancer end-point indoor air screening levels (IASLc) for commercial/industrial air as recommended by the DTSC's (Department of Toxic Substances Control) Human and Ecological Risk Office (DTSC/HERO Note 3, May 2015). The cancer end-point IASLs for air are based on the calculation of contaminant intake through inhalation that would produce the probability of a one in one-million ( ) excess cancer risk. The IASLc was adjusted for screening soil gas data by using the appropriate attenuation factor described in DTSC s 2011 Guidance for the Evaluation and Mitigation of Subsurface Vapor Intrusion to Indoor Air (2011 VIG). According to the 2011 VIG the average attenuation factor for future residential buildings is EMS was informed that the Site will be converted to residential use after demolition and Aston St. Tel (949) Irvine, CA Fax (949)

5 Mr. Brad Perozzi March 11, 2016 Page 4 of 6 grading is completed at the Site; therefore, EMS used the future residential buildings attenuation factor of in calculating the screening levels for each compound detected at the Site. Screening levels were calculated by dividing the IASLc in either the DTSC/HERO Note 3 or when it was not available in this document to the EPA Region 9 Regional Screening Levels (RSL) for Industrial Air by the future residential building attenuation factor. RSLs are chemical-specific concentrations for individual contaminants in air, drinking water and soil that may warrant further investigation or Site cleanup. RSLs have been developed for both commercial/industrial and residential scenarios with residential RSLs being typically lower than commercial/industrial scenarios. The process for derivation of DTSC/HERO Note 3 screening levels is based on the identical computational algorithms used to derive USEPA s RSLs. Procedurally, a series of spreadsheet worksheets were populated with the algorithms, exposure and toxicity factors, and analyte roster used in the USEPA RSL process. DTSC screening levels were derived by populating copies of the aforementioned spreadsheet workbooks with California exposure and toxicity factors, and DTSC-specific methods. The final roster of DTSC screening levels includes only those analytes for which the combination of California-specific exposure and toxicity factors results in a soil or tap water DTSC-SL that is at least three times more stringent than the corresponding USEPA RSL value. None of the VOCs detected in soil gas at the Site exceeded its respective adjusted screening level (see Table 1). None of the VOCs detected were near their respective screening level with the exception of PCE which was detected in sample SV-17 at 5 feet with a concentration of 350 µg/m 3. The soil gas sample result for PCE was compared to the DTSC Hero Note 3 Recommended Screening Level for Residential Soil and were adjusted with the future residential development attenuation factor of The PCE concentration of 350 µg/m 3 in SV-17 at 5 feet did not exceed the DTSC Hero Note 3 adjusted screening level of 480 µg/m 3. Soil samples were collected at depths of 5, 10 and 15 feet at all 21 locations. Duplicate soil samples were collected at 5 feet in the maintenance area in order to potentially send the samples to a separate lab to perform TPH analysis using EPA Method 8015M. Not all soil samples were sent in for analysis by EMS. The soil sample locations selected for analysis were based on the proximity of each boring location to potential recognized environmental conditions identified in EMS s Phase I ESA report and the results of field screening with the PID instrument. The locations chosen for EPA Method 8260B were B-1, B-2, B-5, B-9, B-10, B-12, B-17 and B-21 at a depth of 5 feet, B-7 at depths of 10 and 15 feet and B-11 at depths of 5 and 15 feet. Soil sample results presented on Table 2 were compared to DTSC/HERO Note 3 cancer end point screening levels for residential soil and EPA Region 9 RSLs for residential land use. Soil samples sent in for TPH analysis using EPA Method 8015M were B-7, B-9, B-10, B-11 and B-12 at 5 feet. Soil sample results presented on Table 3 were compared to EPA Region 9 Regional Screening Levels (RSLs) for residential land use. None of the samples analyzed by either EPA Method 8260B or 8015M returned results above the reporting limits for each analyte included in the testing method. With none of the samples returning results above reporting limits, neither the U.S. EPA Region 9 RSLs nor DTSC/HERO Note 3 screening levels for residential soils were exceeded. Conclusions EMS s review of the sample data for the Phase II sampling event determined that none of the soil gas or soil results exceeded their respective health risk based screening levels. Soil gas results did not Aston St. Tel (949) Irvine, CA Fax (949)

6 Mr. Brad Perozzi March 11, 2016 Page 5 of 6 detect any chlorinated solvents with the exception of tetrachloroethylene (PCE) in sample location SV- 17 and SV-17 Dup at concentrations of 330 and 350 µg/m 3, respectively. These results fall below the DTSC/HERO Note 3 adjusted residential screening level of 480 µg/m 3. Trichloroethylene (TCE) was not detected in any of the soil gas samples collected. TPHg in soil gas was not detected above its reporting limit of 50,000 µg/m 3 in any of the samples collected. There is currently no screening level for TPHg in soil gas. The remaining VOCs detected were dichlorodifluoromethane, ethylbenzene, toluene, meta and para xylenes and ortho-xylenes. The highest concentration of dichlorodifluromethane detected in the samples analyzed was 2,100 µg/m 3, which is well below the adjusted EPA Region 9 RSL for dichlorodifluoromethane of 100,000. Ethylbenzene was detected at a maximum concentration of 260 µg/m 3, which fell well below the adjusted EPA Region 9 RSL of 1,100 µg/m 3. The highest toluene concentration detected was 390 µg/m 3, which was also well below the adjusted DTSC/HERO Note 3 screening level of 1,300,000 µg/m 3. Meta and para xylenes and ortho xylenes were detected at maximum concentrations of 1,100 and 330 µg/m 3, which both fell below their respective EPA Region 9 RSLs of 100,000 µg/m 3. Volatile organic compounds were not detected above reporting limits in any of the soil samples chosen for analysis by EMS. TPHg was also not detected above reporting limits in any of the soil samples analyzed by EST. The reporting limits for VOCs and TPHg in soil fall well below the EPA Region 9 RSLs and DTSC/HERO Note 3 screening levels. Soil samples in the maintenance area at a depth of 5-feet (B-9 to B-12) along with one sample near the aboveground diesel storage tank (B-7) were sent to Alpha Scientific Corporation for the analysis of Total Petroleum Hydrocarbons using EPA Method 8015M. This method reports the concentration of purgeable and extractable hydrocarbons that are sometimes referred to as gasoline, diesel and oil range organics based on the boiling point of each hydrocarbon. None of the samples analyzed reported TPH in gasoline, diesel or oil range above its respective reporting limit. The reporting limits for each hydrocarbon in the gasoline, diesel and oil range are well below the EPA Region 9 RSLs for Aliphatic Total Petroleum Hydrocarbons. EMS understands the Site is undergoing planning for future redevelopment to residential structures. EMS recommends that a Soil Management Plan (SMP) be developed for the Site and used during Site demolition and grading. The SMP should specify the process for identifying, segregating, profiling and disposing of any stained/strong odor soil. The SMP should also specify the process for removal and cleanup of the clarifier. Based on the soil gas and soil results EMS recommends that the clarifier, waste oil and diesel tanks be removed according to local regulations and any soil that appears to be stained or has a strong odor to be segregated for proper profiling and disposal. A representative sample of the stained/strong odor soil should be collected and analyzed to confirm it is not hazardous and should be disposed in a proper manner. This is also recommended for the soil beneath the concrete pad in the southeast portion of the property. A low concentration of PCE was detected at boring SV-17 near the concrete pad. Closing EMS is pleased to present this Phase II Environmental Site Assessment Report for the A-1 Coast Rentals property located at Crenshaw Boulevard, Lomita, California. Please do not hesitate to call me at (949) with any questions or comments Aston St. Tel (949) Irvine, CA Fax (949)

7 Sincerely, Mr. Brad Perozzi March 11, 2016 Page 6 of 6 ENVIRONMENTAL MANAGEMENT STRATEGIES, INC. Anthony Severini, P.G. President Attachments Figure 1, Site Location Map Figure 2, Site Map with Boring Locations Table 1, Soil Gas Sampling s for VOCs and TPHg Table 2, Soil Sample s for VOCs and TPHg Table 3, Soil Sample s for TPHg, TPHd and TPHo Laboratory Report, EST, VOC and TPHg Soil Gas Sampling s 2/22/16 to 2/24/16 Laboratory Report, EST, VOC and TPHg Soil Sample s 2/22/15 to 2/24/16 Laboratory Report, Alpha Scientific Corporation, TPHg, TPHd and TPHo Soil Sample s 2/22/16 to 2/24/ Aston St. Tel (949) Irvine, CA Fax (949)

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10 TABLE 1 SOIL GAS SAMPLING RESULTS FOR VOCs AND TPHG CRENSHAW BOULEVARD LOMITA, CALIFORNIA Probe Date Depth PCE TCE DCDFM EB Toluene m,p-xyl o-xyl TPHg ID (ft) µg/m 3 SV-1 SV-2 SV-3 SV-4 SV-5 SV-6 SV-7 SV-8 SV-9 SV-10 SV-11 SV-12 SV-13 02/23/16 02/23/16 02/22/16 02/22/16 02/22/16 02/22/16 02/22/16 02/23/16 02/24/16 02/24/16 02/24/16 02/24/16 02/24/ <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 < ,200 1,500 <500 <500 <500 <500 <500 <500 <500 < J 170J 200J 160J 190J 210J <500 <500 <500 <500 <500 <500 < J 100J 120J < J <50,000 <50,000 <50,000 <50,000 <50,000 <50,000 <50,000 <50,000 <50,000 <50,000 <50,000 <50,000 <50, <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 <100 < , , , < J 120J 180J <500 <500 < J < J 180J 110J 270J 1,100 <500 < J <500 <500 < J 110J 130J 140J < J 330 <50,000 <50,000 <50,000 <50,000 <50,000 <50,000 <50,000 <50,000 <50,000 <50,000 <50,000 <50,000 <50,000 Page 1 of 3

11 TABLE 1 SOIL GAS SAMPLING RESULTS FOR VOCs AND TPHG CRENSHAW BOULEVARD LOMITA, CALIFORNIA Probe Date Depth PCE TCE DCDFM EB Toluene m,p-xyl o-xyl TPHg ID (ft) µg/m 3 SV-14 02/23/16 5 <100 <100 <500 <500 <50, <100 < J 200J <50,000 SV-15 02/23/16 5 <100 <100 <500 <500 <50, <100 <100 <500 <500 <50,000 SV-16 02/23/16 5 <100 <100 < J <50, <100 < J < <50,000 SV-17 02/24/ < J 280J <50, <100 < J 390J J <50,000 SV-18 02/24/16 5 <100 <100 <500 <500 <50, <100 <100 <500 <500 <50,000 SV-19 02/23/16 5 <100 < J 130J <50, <100 < J 130J <50,000 SV-20 02/22/16 5 <100 <100 <500 <500 <50, <100 <100 <500 <500 <50,000 SV-21 02/22/16 5 <100 <100 <500 <500 <50, <100 < <500 <500 <50,000 QA/QC 02/22/16 NA <100 <100 <500 <500 <50,000 Eq. Blank 02/23/16 NA <100 <100 <500 <500 <50,000 02/24/16 NA <100 <100 <500 <500 <50,000 02/22/16 NA <100 <100 <500 <500 <50,000 Material Blank 02/23/16 NA <100 <100 <500 <500 <50,000 02/24/16 NA <100 <100 <500 <500 <50,000 SV-4 DUP 02/22/16 5 <100 <100 <500 <500 <50,000 SV-2 DUP 02/23/16 5 <100 <100 <500 <500 <50,000 SV-17 DUP 02/24/ < J 290J <50,000 Page 2 of 3

12 TABLE 1 SOIL GAS SAMPLING RESULTS FOR VOCs AND TPHG CRENSHAW BOULEVARD LOMITA, CALIFORNIA Probe Date Depth PCE TCE DCDFM EB Toluene m,p-xyl o-xyl TPHg ID (ft) µg/m 3 Screening Levels EPA Region 9 RSL (Res) NA NA NA ,000 1,100 NA 100, ,000 NA DTSC HERO Note 3 (Res) NA NA 480 NA NA NA 1.3E+06 NA NA NA Notes: µg/m3 = micrograms per cubic meter VOCs = PCE = Perchloroethene, also referred to as Tetrachloroethene TCE = Trichloroethene DCDFM = Dichlorodifluoromethane EB = Ethylbenzene m,p-xyl = meta & para-xylenes o-xyl = ortho-xylenes TPHg = Total Petroleum Hydrocarbons-gasoline NA = Not Applicable J = Detected but below the ; therefore, result is an estimated concentration. EPA Region 9 RSL (Res) = U.S. Environmental Protection Agency Region 9 Regional Screening Level for Residential Soil (November 2015) multiplied by the Vapor Intrusiton Guidance Future Residential Attenuation Factor DTSC Hero Note 3 (Res) = Department of Substance Control - Human and Ecological Risk Office - Recommended Screening Levels for Residential Soil (May 2015) multiplied by Vapor Intrustion Guidance Future Residential Attenuation Factor Page 3 of 3

13 TABLE 2 SOIL SAMPLE RESULTS FOR VOCs AND TPHG CRENSHAW BOULEVARD LOMITA, CALIFORNIA Sample Sampling Depth PCE TCE Benzene EB Naph Toluene 1,2,4-TMB 1,3,5-TMB Xyl TPHg ID Date (ft) ug/kg B-1 02/23/16 5 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <15 <250 B-2 02/22/16 5 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <15 <250 B-5 02/22/16 5 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <15 <250 B-7 02/22/16 10 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <15 < <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <15 <250 B-9 02/24/16 5 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <15 <250 B-10 02/24/16 5 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <15 <250 B-11 02/24/16 5 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <15 < <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <15 <250 B-12 02/24/16 5 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <15 <250 B-17 02/23/16 5 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <15 <250 B-21 02/22/16 5 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <15 <250 QA/QC Equipment Blank <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <15 <250 Screening Levels EPA Region 9 RSL (Res) DTSC HERO Note 3 (Res) 24, ,200 5,800 3,800 4,900,000 58, , , , NA 330 NA NA 1,100,000 NA 210,000 NA NA Notes: ft = feet Naph = Naphthalene ug/kg = micrograms per kilogram 1,2,4-TMB = 1,2,4-Trimethylbenzene PCE = Tetrachloroethene (also referred to as Perchloroethene) 1,3,5-TMB = 1,3,5-Trimethylbenzene TCE = Trichloroethene Xyl = Xylenes EB = Ehtylbenzene NA = Not Applicable TPHg = Total Petroleum Hydrocarbons Gasoline Range Organics EPA Region 9 RSL (Res) = U.S. Environmental Protection Agency Region 9 Regional Screening Level for Residential Soil (November 2015) DTSC Hero Note 3 (Res) = Department of Substance Control - Human and Ecological Risk Office - Recommended Screening Levels for Residential Soil (May 2015) TPHg Soil Screening Level Based on Low Boiling Point Aliphatic TPH (RSL, November 2015)

14 TABLE 3 SOIL SAMPLE RESULTS FOR TPHG, TPHD AND TPHO CRENSHAW BOULEVARD LOMITA, CALIFORNIA Sample Sampling Depth TPHg TPHd TPHo ID Date (ft) C4-C12 C13-C23 C24-C40 µg/kg B-7 04/16/14 5 <0.5 <5 <50 B-9 04/16/14 5 <0.5 <5 <50 B-10 04/16/14 5 <0.5 <5 <50 B-11 04/16/14 5 <0.5 <5 <50 B-12 04/16/14 5 <0.5 <5 <50 QA/QC Method Blank <0.5 <5 <50 Screening Levels EPA Region 9 RSL (Res) ,000 Notes: Only Detected Constituents are Listed VOCs = by EPA Method 8260B ft = feet ug/kg = micrograms per kilogram TPHg = Total Petroleum Hydrocarbons Gasoline Range Organics TPHd = Total Petroleum Hydrocarbons Diesel Range Organics TPHo = Total Petroleum Hydrocarbons Oil Range Organics NA = Not Applicable J = Detected but Below the ; Therefore, is an Estimated Concentration EPA Region 9 RSL (Res) = U.S. Environmental Protection Agency Region 9 Regional Screening Level for Residential Soil (November 2015) TPHg Soil Screening Level Based on Low Boiling Point Aliphatic TPH (RSL, November 2015) TPHd Soil Screening Level Based on Medium Boiling Point Aliphatic TPH (RSL, November 2015) TPHo Soil Screening Level Based on High Boiling Point Aliphatic TPH (RSL, November 2015)

15 February 25, 2016 Mr. Anthony F. Severini Environmental Management Strategies, Inc. RE: Crenshaw Blvd. Lomita, CA Enclosed are the results of analyses for soil gas samples received by Environmental Support Technologies laboratory on 02/22/16 17:25. The analyses were performed according to the prescribed method as outlined by EPA 8260B. A shut in test was performed, leak test was performed, equipment blank was run, and selected purge volume was 3PV. If you have any questions concerning this report, please feel free to contact Project Manager. Sincerely, Ashley Flores Ashley Flores Project Manager laboratories are certified by the California Department of Health Services (CDHS), Environmental Laboratory Accreditation Program (ELAP) No's. 2772, 2773, and 2767.,

16 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 ANALYTICAL REPORT FOR SAMPLES Sample ID Laboratory ID Matrix Date Sampled Date Analyzed Equipment Blank 4B Air 22-Feb-16 09:05 22-Feb-16 09:22 Material Blank 4B Air 22-Feb-16 09:35 22-Feb-16 09:51 SV-4-5 3PV 4B Air 22-Feb-16 09:35 22-Feb-16 10:28 SV PV 4B Air 22-Feb-16 11:10 22-Feb-16 11:25 SV PV 4B Air 22-Feb-16 11:40 22-Feb-16 11:54 SV PV 4B Air 22-Feb-16 12:10 22-Feb-16 12:22 SV-3-5 3PV 4B Air 22-Feb-16 12:35 22-Feb-16 12:51 SV PV 4B Air 22-Feb-16 13:05 22-Feb-16 13:20 SV PV 4B Air 22-Feb-16 13:35 22-Feb-16 13:49 SV PV 4B Air 22-Feb-16 14:05 22-Feb-16 14:17 SV-6-5 3PV 4B Air 22-Feb-16 14:30 22-Feb-16 14:46 SV PV 4B Air 22-Feb-16 15:00 22-Feb-16 15:15 SV-7-5 3PV 4B Air 22-Feb-16 15:30 22-Feb-16 15:43 SV PV 4B Air 22-Feb-16 15:55 22-Feb-16 16:12 SV-5-5 3PV 4B Air 22-Feb-16 16:25 22-Feb-16 16:41 SV PV 4B Air 22-Feb-16 16:55 22-Feb-16 17:09, Page 1 of 21

17 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 Equipment Blank (4B ) Air Sampled: 02/22/16 09:05 Analyzed: 02/22/16 09:22 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air 1 46B /22/16 02/22/16 EPA 8260B 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane ND 200 Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene 0 trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane 104 % Surrogate: Toluene-d % Surrogate: 4-Bromofluorobenzene 96.7 % Gasoline Range Hydrocarbons 000 GROs by GC/MS, Page 2 of 21

18 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 Material Blank (4B ) Air Sampled: 02/22/16 09:35 Analyzed: 02/22/16 09:51 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air 1 46B /22/16 02/22/16 EPA 8260B 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane ND 200 Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene 0 trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane 107 % Surrogate: Toluene-d % Surrogate: 4-Bromofluorobenzene 97.5 % Gasoline Range Hydrocarbons 000 GROs by GC/MS, Page 3 of 21

19 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 SV-4-5 3PV (4B ) Air Sampled: 02/22/16 09:35 Analyzed: 02/22/16 10:28 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air 1 46B /22/16 02/22/16 EPA 8260B 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane ND 200 Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene 0 trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane 106 % Surrogate: Toluene-d % Surrogate: 4-Bromofluorobenzene 95.2 % Gasoline Range Hydrocarbons 000 GROs by GC/MS, Page 4 of 21

20 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 SV PV (4B ) Air Sampled: 02/22/16 11:10 Analyzed: 02/22/16 11:25 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air 1 46B /22/16 02/22/16 EPA 8260B 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane ND 200 Ethylbenzene ND 200 meta- and para-xylenes J Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene J trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane 107 % Surrogate: Toluene-d % Surrogate: 4-Bromofluorobenzene 97.5 % Gasoline Range Hydrocarbons 000 GROs by GC/MS, Page 5 of 21

21 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 SV PV (4B ) Air Sampled: 02/22/16 11:40 Analyzed: 02/22/16 11:54 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air 1 46B /22/16 02/22/16 EPA 8260B 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane ND 200 Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene 0 trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane 105 % Surrogate: Toluene-d % Surrogate: 4-Bromofluorobenzene 97.4 % Gasoline Range Hydrocarbons 000 GROs by GC/MS, Page 6 of 21

22 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 SV PV (4B ) Air Sampled: 02/22/16 12:10 Analyzed: 02/22/16 12:22 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air 1 46B /22/16 02/22/16 EPA 8260B 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane ND 200 Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene 0 trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane 107 % Surrogate: Toluene-d % Surrogate: 4-Bromofluorobenzene 98.5 % Gasoline Range Hydrocarbons 000 GROs by GC/MS, Page 7 of 21

23 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 SV-3-5 3PV (4B ) Air Sampled: 02/22/16 12:35 Analyzed: 02/22/16 12:51 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air 1 46B /22/16 02/22/16 EPA 8260B 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene 0 trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane 109 % Surrogate: Toluene-d % Surrogate: 4-Bromofluorobenzene 101 % Gasoline Range Hydrocarbons 000 GROs by GC/MS, Page 8 of 21

24 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 SV PV (4B ) Air Sampled: 02/22/16 13:05 Analyzed: 02/22/16 13:20 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air 1 46B /22/16 02/22/16 EPA 8260B 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane ND 200 Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene J trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane 110 % Surrogate: Toluene-d % Surrogate: 4-Bromofluorobenzene 96.0 % Gasoline Range Hydrocarbons 000 GROs by GC/MS, Page 9 of 21

25 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 SV PV (4B ) Air Sampled: 02/22/16 13:35 Analyzed: 02/22/16 13:49 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air 1 46B /22/16 02/22/16 EPA 8260B 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane ND 200 Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene 0 trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane 111 % Surrogate: Toluene-d % Surrogate: 4-Bromofluorobenzene 96.3 % Gasoline Range Hydrocarbons 000 GROs by GC/MS, Page 10 of 21

26 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 SV PV (4B ) Air Sampled: 02/22/16 14:05 Analyzed: 02/22/16 14:17 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air 1 46B /22/16 02/22/16 EPA 8260B 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene 0 trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane 111 % Surrogate: Toluene-d % Surrogate: 4-Bromofluorobenzene 95.6 % Gasoline Range Hydrocarbons 000 GROs by GC/MS, Page 11 of 21

27 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 SV-6-5 3PV (4B ) Air Sampled: 02/22/16 14:30 Analyzed: 02/22/16 14:46 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air 1 46B /22/16 02/22/16 EPA 8260B 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane ND 200 Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene 0 trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane 107 % Surrogate: Toluene-d % Surrogate: 4-Bromofluorobenzene 96.1 % Gasoline Range Hydrocarbons 000 GROs by GC/MS, Page 12 of 21

28 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 SV PV (4B ) Air Sampled: 02/22/16 15:00 Analyzed: 02/22/16 15:15 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air 1 46B /22/16 02/22/16 EPA 8260B 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene 0 trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane 108 % Surrogate: Toluene-d % Surrogate: 4-Bromofluorobenzene 98.2 % Gasoline Range Hydrocarbons 000 GROs by GC/MS, Page 13 of 21

29 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 SV-7-5 3PV (4B ) Air Sampled: 02/22/16 15:30 Analyzed: 02/22/16 15:43 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air 1 46B /22/16 02/22/16 EPA 8260B 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene 0 trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane 110 % Surrogate: Toluene-d % Surrogate: 4-Bromofluorobenzene 97.3 % Gasoline Range Hydrocarbons 000 GROs by GC/MS, Page 14 of 21

30 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 SV PV (4B ) Air Sampled: 02/22/16 15:55 Analyzed: 02/22/16 16:12 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air 1 46B /22/16 02/22/16 EPA 8260B 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene 0 trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane 106 % Surrogate: Toluene-d % Surrogate: 4-Bromofluorobenzene 98.9 % Gasoline Range Hydrocarbons 000 GROs by GC/MS, Page 15 of 21

31 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 SV-5-5 3PV (4B ) Air Sampled: 02/22/16 16:25 Analyzed: 02/22/16 16:41 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air 1 46B /22/16 02/22/16 EPA 8260B 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene 0 trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane 111 % Surrogate: Toluene-d % Surrogate: 4-Bromofluorobenzene 103 % Gasoline Range Hydrocarbons 000 GROs by GC/MS, Page 16 of 21

32 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 SV PV (4B ) Air Sampled: 02/22/16 16:55 Analyzed: 02/22/16 17:09 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air 1 46B /22/16 02/22/16 EPA 8260B 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene 0 trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane 108 % Surrogate: Toluene-d % Surrogate: 4-Bromofluorobenzene 98.5 % Gasoline Range Hydrocarbons 000 GROs by GC/MS, Page 17 of 21

33 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 - Quality Control Units Spike Level Source %REC %REC s RPD RPD Notes Batch 46B Volatiles Blank (46B2203-BLK1) Prepared & Analyzed: 02/22/16 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air Gasoline Range Hydrocarbons 000 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane ND 200 Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene 0 trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane Surrogate: Toluene-d Surrogate: 4-Bromofluorobenzene , Page 18 of 21

34 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 - Quality Control Units Spike Level Source %REC %REC s RPD RPD Notes Batch 46B Volatiles LCS (46B2203-BS1) Prepared & Analyzed: 02/22/16 1,1,1,2-Tetrachloroethane ug/m³ Air ,1,1-Trichloroethane ,1,2,2-Tetrachloroethane ,1,2-Trichloroethane ,1,2-Trichloro-trifluoroethane ,1-Dichloroethane ,1-Dichloroethene ,2-Dichloroethane Benzene Carbon tetrachloride Chloroethane Chloroform cis-1,2-dichloroethene Dichlorodifluoromethane Ethylbenzene meta- and para-xylenes Methylene Chloride ortho-xylene Tetrachloroethene Toluene trans-1,2-dichloroethene Trichloroethene Trichlorofluoromethane Vinyl Chloride Surrogate: Dibromofluoromethane Surrogate: Toluene-d Surrogate: 4-Bromofluorobenzene , Page 19 of 21

35 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 - Quality Control Units Spike Level Source %REC %REC s RPD RPD Notes Batch 46B Volatiles LCS (46B2203-BS2) Prepared & Analyzed: 02/22/16 Gasoline Range Hydrocarbons ug/m³ Air Duplicate (46B2203-DUP1) Source: 4B Prepared & Analyzed: 02/22/16 Gasoline Range Hydrocarbons 000 ug/m³ Air 1,1,1,2-Tetrachloroethane ND 200 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane ND 200 Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene 0 trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 ND 200 Surrogate: Dibromofluoromethane Surrogate: Toluene-d Surrogate: 4-Bromofluorobenzene , Page 20 of 21

36 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:25 Notes and Definitions J DET ND NR dry RPD Detected but below the ; therefore, result is an estimated concentration (CLP J-Flag). DETECTED NOT DETECTED at or above the reporting limit Not Reported Sample results reported on a dry weight basis Relative Percent Difference, Page 21 of 21

37 February 25, 2016 Mr. Anthony F. Severini Environmental Management Strategies, Inc. RE: Crenshaw Blvd. Lomita, CA Enclosed are the results of analyses for soil gas samples received by Environmental Support Technologies laboratory on 02/23/16 18:01. The analyses were performed according to the prescribed method as outlined by EPA 8260B. A shut in test was performed, leak test was performed, equipment blank was run, and selected purge volume was 3PV. If you have any questions concerning this report, please feel free to contact Project Manager. Sincerely, Ashley Flores Ashley Flores Project Manager laboratories are certified by the California Department of Health Services (CDHS), Environmental Laboratory Accreditation Program (ELAP) No's. 2772, 2773, and 2767.,

38 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:56 ANALYTICAL REPORT FOR SAMPLES Sample ID Laboratory ID Matrix Date Sampled Date Analyzed Equipment Blank 4B Air 23-Feb-16 08:40 23-Feb-16 08:56 Material Blank 4B Air 23-Feb-16 09:10 23-Feb-16 09:26 SV-2-5 3PV 4B Air 23-Feb-16 09:40 23-Feb-16 09:55 SV PV 4B Air 23-Feb-16 10:35 23-Feb-16 10:51 SV-1-5 3PV 4B Air 23-Feb-16 11:05 23-Feb-16 11:20 SV PV 4B Air 23-Feb-16 11:35 23-Feb-16 11:48 SV-8-5 3PV 4B Air 23-Feb-16 12:00 23-Feb-16 12:17 SV PV 4B Air 23-Feb-16 12:30 23-Feb-16 12:45 SV PV 4B Air 23-Feb-16 13:00 23-Feb-16 13:14 SV PV 4B Air 23-Feb-16 13:30 23-Feb-16 13:43 SV PV 4B Air 23-Feb-16 13:55 23-Feb-16 14:11 SV PV 4B Air 23-Feb-16 14:25 23-Feb-16 14:39 SV PV 4B Air 23-Feb-16 14:55 23-Feb-16 15:08 SV PV 4B Air 23-Feb-16 15:20 23-Feb-16 15:36 SV PV 4B Air 23-Feb-16 15:50 23-Feb-16 16:05 SV PV 4B Air 23-Feb-16 16:20 23-Feb-16 16:34, Page 1 of 21

39 Project Manager: Mr. Anthony F. Severini 25-Feb-16 10:56 Equipment Blank (4B ) Air Sampled: 02/23/16 08:40 Analyzed: 02/23/16 08:56 1,1,1,2-Tetrachloroethane ND 200 ug/m³ Air 1 46B /23/16 02/23/16 EPA 8260B 1,1,1-Trichloroethane ND 200 1,1,2,2-Tetrachloroethane ND 200 1,1,2-Trichloroethane ND 200 1,1,2-Trichloro-trifluoroethane ND 200 1,1-Dichloroethane ND 200 1,1-Dichloroethene ND 100 1,2-Dichloroethane ND 200 Benzene ND 100 Carbon tetrachloride ND 200 Chloroethane ND 200 Chloroform ND 200 cis-1,2-dichloroethene ND 200 Dichlorodifluoromethane ND 200 Ethylbenzene ND 200 meta- and para-xylenes 0 Methylene Chloride ND 200 ortho-xylene ND 200 Tetrachloroethene ND 100 Toluene 0 trans-1,2-dichloroethene ND 200 Trichloroethene ND 100 Trichlorofluoromethane ND 200 Vinyl Chloride ND Propanol ND 290 Surrogate: Dibromofluoromethane 107 % Surrogate: Toluene-d % Surrogate: 4-Bromofluorobenzene 98.6 % Gasoline Range Hydrocarbons 000 GROs by GC/MS, Page 2 of 21