F 2: Phase 2 Soil Vapor Investigation for Potential Off Site Vapor Intrusion

Transcription

1 F 2: Phase 2 Soil Vapor Investigation for Potential Off Site Vapor Intrusion

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3 October 31, 2014 Mr. Bob Linder Essex Property Trust, Inc California Avenue, #250 Irvine, California Subject: Phase 2 Soil Vapor Investigation for Potential Off-Site Vapor Intrusion Nickelodeon Theater at 6230 West Sunset Blvd. Hollywood, California Versar Project No Dear Mr. Linder: Per Essex s request, Versar has performed a Phase 2 Soil Vapor Investigation for potential off-site vapor intrusion at the Nickelodeon Theater, located at 6230 W. Sunset Blvd. in Hollywood, California (Site). Versar s Phase I Environmental Site Assessment (ESA) report of the Site, dated October 8, 2014 identified one potential Vapor Encroachment Condition (pvec) to the Site. An Environmental Data Resources, Inc. (EDR) US Historical Cleaners listing at 6214 Sunset Blvd., Moore C W. The Moore C W listing is identified in the EDR report as being a 1933 clothes pressers and cleaners. The EDR report lists this facility to be 104 feet northeast of the Site; however, Versar's Site reconnaissance and review of Sanborn fire insurance maps identified the property address to abut the east wall of the Site building. As such, the listing is within the American Society for Testing and Materials (ASTM) Critical Distance of 100 feet for Contaminants of Concern (COC) and represents a pvec to the Site. Given the proximity of the former clothes presser and cleaner business from the Site during a time when use of chlorinated solvents was not regulated, the potential exists for contaminants from this former clothes presser and cleaner business to impact the Site. The location of the Site is depicted in Figure 1 and the borings locations along with the former adjoining property at 6214 Sunset Blvd. are illustrated on Figure 2, Investigation Layout Map, as presented in Attachment 1. Scope To assess whether a substantive release of chlorinated solvents or volatile petroleum hydrocarbons (both materials were used for dry cleaning at the time) has created a pvec to the Site, a soil vapor survey was conducted comprising three (3) temporary vapor sampling points in the basement of the Site building along the east wall, nearest to the 6214 Sunset Blvd. building. The basement where the samples were collected is approximately 10 feet below grade surface (bgs). All three samples collected beneath the sealed floor slab at a depth of 16 inches beneath the basement floor surface. Vapor samples were analyzed for volatile organic compounds (VOCs). The sampling system leak check compound, isopropyl alcohol, was analyzed for quality control Primrose Drive, Suite 147 Fair Oaks, CA

4 FIELD INVESTIGATION Permitting A boring permit for this work was not required by Los Angeles County or the State of California. Utility Clearance Utility clearance for the Site was not conducted as the borings consisted of sub-slab locations inside the basement. No utilities were encountered during the investigation. Decontamination Procedures Down-hole equipment including drilling rods, bits, augers and sampling equipment were thoroughly cleaned before and after the drilling of each borehole. Equipment was cleaned with water and laboratory-grade, non-phosphate surfactant, and double rinsed, or highpressure washed. Wastewater generated during this process was removed from the Site when drilling was completed. Clean, disposable gloves were worn by all field personnel when handling decontaminated equipment. FIELD ACTIVITIES On October 22, 2014, three temporary vapor wells were installed near the eastern interior wall of the Site, spaced out equidistant across from the abutting building at 6214 Sunset Blvd. Each well comprised new quarter-inch Teflon tubing and a six-inch stainless steel screen. The soil vapor probes were constructed with a new stainless steel Post-Run Tubing drive point and adapter connected to new 0.25-inch Teflon tubing to the surface. Soil vapor probes were set in clean sand 3-4 inches above the final depth of the boring. A bentonite seal was installed at the surface of the boring. Each soil vapor sampling point was allowed to equilibrate for at least 24 hours or more after completion before a sample was collected into a 1-liter certified-clean Summa canister. On October 23, 2014, Versar collected the soil vapor samples from the temporary wells that were installed in each boring. Prior to purging or sampling soil gas, a shut-in-test was conducted to check for leaks in the above-ground fittings. The shut-in test consisted of assembling the above-ground manifold and tubing and applying a vacuum, then shutting the vacuum in with closed valves on opposite ends of the sampling train. The vacuum gauge was observed for at least three minutes and if there was observable loss of vacuum, the fittings were adjusted as needed until the vacuum in the sample train did not noticeably dissipate. If adjustments to the fittings did not stop the loss, the manifold would be traded out and a new shut-in test conducted. Each of the vapor wells was purged of three well volumes, calculated using the volume of the Post-Run Tubing system and blank casing, at the same rate as the sample collection, 150 ml/min. Nickelodeon Phase 2 Soil Vapor Investigation 2 PAGE October 31, Primrose Drive, Suite 147 Fair Oaks, CA

5 The well and entire sampling train was placed under a shroud constructed of 2 mil plastic. Isopropyl alcohol (IPA) was applied to a cloth and placed inside a glass jar inside the sampling shroud, then opened during sample collection, to serve as a leak trace compound. Soil vapor sampling field notes are presented in Attachment 2. Each sample was immediately labeled with a sample and Site-specific alpha-numeric code and contained within an insulated chest until released to the courier under chain-of-custody protocol. The samples were collected, placed in containers, preserved, and analyzed within the time constraints consistent with applicable United States Environmental Protection Agency (USEPA), California EPA, and industry practices. Storage and Disposal of Wastes Wastes collected during the investigation comprised project related trash. Trash was removed from the Site and disposed to a municipal receptacle. Laboratory Analysis The soil vapor samples were submitted directly to a state-certified laboratory for chemical analyses; (SunStar), (Environmental Laboratory Accreditation Program [ELAP] Certificate No. 2250). All samples were analyzed within instrument and accuracy limits defined by the method for the following: VOCs, including isopropyl alcohol, by EPA Method TO-15. The results of analytical testing for soil vapor are presented in the laboratory report and chain-of-custody documentation in Attachment 3. FINDINGS Three soil vapor samples were collected at the Site where, in accordance to Versar s professional judgment, VOCs may reasonably be anticipated to be detected had a substantive release of VOCs occurred from the former adjoining historical cleaners. The regulatory threshold applied to the Site are the Use of California Human Health Screening Levels (CHHSLs) in Evaluation of Contaminated Properties, January 2005 by the California EPA and the San Francisco Regional Water Quality Control Board Environmental Screening Levels (SF RWQCB ESLs December 2013). At the vapor sample point SS-1, the southernmost of the three locations, 1,2,4- Trimethylbenzene, was detected at a concentration of 7.0 micrograms per cubic meter (ug/m 3 ) and m,p-xylenes at a concentration of 9.3 ug/m 3. The Residential CHHSL for the m, p xylene is 320,000 ug/m 3 and the Residential SF RWQCB ESL for total xylenes is 52,000 ug/m 3. No regulatory action levels have been established for 1,2,4-Trimethylbenzene. At the SS2 sample location, the central of the three locations, 1,2,4-Trimethylbenzene was detected at a concentration of 6.0 ug/m 3, toluene at 5.1 ug/m 3 and m,p-xylenes at a concentration of 10 ug/m 3. The Residential CHHSL for toluene is 140,000 ug/m 3 and the SF RWQCB ESL is 160,000 ug/m 3. At the SS3 sample location, the northernmost of the three locations, tetrachloroethene was detected at a concentration of 15 ug/m 3. The Residential Nickelodeon Phase 2 Soil Vapor Investigation 3 PAGE October 31, Primrose Drive, Suite 147 Fair Oaks, CA

6 CHHSL for tetrachloroethene is 180 ug/m 3 and the SF RWQCB ESL is 210 ug/m 3. No other VOCs were detected in any of the other samples. No isopropyl alcohol (IPA), the leak detection chemical, was detected in any of the samples, indicating that the samples were not diluted by ambient air leakage into the sampling equipment. CONCLUSIONS AND RECOMMENDATIONS Versar, Inc. (Versar) has performed a Phase 2 soil vapor investigation of a portion of the property at 6230 West Sunset Blvd. in Hollywood, California. The purpose of the investigation was to determine if the identified off-site pvec, an adjoining historical clothes presser and cleaners location, presented an environmental concern and pvec for the Site. Volatile organic compounds associated with the historical business practices on the eastern adjoining property do not, based on the findings of this Phase 2 ESA, appear to have impacted the Site. Of the sample detections, only tetrachloroethene at the SS3 sample location is associated with dry cleaning compounds. Since this compound was detected at a trace concentration well below the action level in only one of the three samples, and the source of the compound has long since been removed (1930s cleaner), its presence is not considered indicative of an impairment to the Site. Trace concentrations of m,p-xylene, toluene and 1,2,4-Trimethylbenzene are not associated with the dry cleaning industry and do not indicate a substantive release of the respective compounds. Versar appreciates this opportunity to provide our professional environmental consulting services to Essex Property Trust. If you wish to discuss or have any questions pertaining to the information presented in this report, please contact me at (916) and tberger@versar.com. Sincerely, Tim Berger, P.G., R.E.A. Program Manager Southwest Division Attachments 1 Figures 2 Soil Vapor Sampling Field Notes 3 Laboratory Analytical Report Nickelodeon Phase 2 Soil Vapor Investigation 4 PAGE October 31, Primrose Drive, Suite 147 Fair Oaks, CA

7 ATTACHMENT 1 Figures

8 Image Provided By EDR USGS Topographic Maps Boundaries are approximate SITE LOCATION MAP NICKELODEON THEATER 6230 West Sunset Boulevard Los Angeles California PREPARED FOR: Essex PROJ. MGR: Tim Berger DATE: 9/25/2014 DRAWN BY: David Sendek PROJ. #:

9 Trailer Ancillary Storage Structures W. Sunset Blvd. 500 Square Foot Concrete Block Addition to be Demolished Tent Basement Area is Approximately 10 Feet Below Ground Surface SS3 Basement Office Hallway SS2 Basement Make Up Room SS1 Basement Maintenance Area Moore CW NORTH Historical Cleaner and pvec (6214 W. Sunset) No Basement in the Rear Add-On Area of Building LEGEND: Soil Vapor Boring Location and Designation Dr. By: DSendek Date: 10/27/2014 Scale: NTS Project No. : INVESTIGATION LAYOUT MAP Nickelodeon Theater 6230 W. Sunset Boulevard Hollywood, California Figure 2

10 SS3 Basement Office Hallway (PERC 15 ug/m 3 ) Moore CW NORTH Historical Cleaner and pvec (6214 W. Sunset) SS2 Basement Make Up Room (1,2,4-TMB 6.0 ug/m 3 Toluene 5.1 ug/m 3 m,p-xylene 10 ug/m 3 ) SS1 Basement Maintenance Area (1,2,4-TMB 7.0 ug/m 3 m,p, Xylene 9.3 ug/m 3 ) LEGEND: Soil Vapor Boring Location and Designation All Sample Results in micrograms per cubic meter (ug/m 3 ) PERC = Tetrachloroethene 1,2,4-TMB = 1,2,4-Trimethylbenzene Dr. By: DSendek Date: 10/28/2014 Scale: NTS Project No. : SAMPLE RESULTS MAP Nickelodeon Theater 6230 W. Sunset Boulevard Hollywood, California Figure 3

11 ATTACHMENT 2 Soil Vapor Sampling Field Notes

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16 ATTACHMENT 3 Laboratory Analytical Report

17 25712 Commercentre Drive Lake Forest, California Phone Fax 30 October 2014 Dave Sendek Versar -- Fair Oaks 5330 Primrose Dr. #147 Fair Oaks, CA RE: Nick on Sunset Enclosed are the results of analyses for samples received by the laboratory on 10/23/14 11:50. If you have any questions concerning this report, please feel free to contact me. Sincerely, Daniel Chavez Project Manager

18 25712 Commercentre Drive Lake Forest, California Phone Fax Versar -- Fair Oaks Project: Nick on Sunset 5330 Primrose Dr. #147 Project Number: [none] Fair Oaks CA, Project Manager: Dave Sendek Reported: 10/30/14 14:32 ANALYTICAL REPORT FOR SAMPLES Sample ID Laboratory ID Matrix Date Sampled Date Received SSAT-0037 T Air 10/23/14 10:10 10/23/14 11:50 SSAT-0023 T Air 10/23/14 10:40 10/23/14 11:50 SSAT-0138 T Air 10/23/14 11:05 10/23/14 11:50 DETECTIONS SUMMARY Sample ID: SSAT-0037 Laboratory ID: T Reporting Analyte Result Limit Units Method 1,2,4-Trimethylbenzene ug/m³ Air TO-15 m,p-xylene ug/m³ Air TO-15 Notes Sample ID: SSAT-0023 Laboratory ID: T Reporting Analyte Result Limit Units Method 1,2,4-Trimethylbenzene ug/m³ Air TO-15 Toluene ug/m³ Air TO-15 m,p-xylene ug/m³ Air TO-15 Notes Sample ID: SSAT-0138 Laboratory ID: T Reporting Analyte Result Limit Units Method Tetrachloroethene ug/m³ Air TO-15 Notes The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Daniel Chavez, Project Manager Page 1 of 12

19 25712 Commercentre Drive Lake Forest, California Phone Fax Versar -- Fair Oaks Project: Nick on Sunset 5330 Primrose Dr. #147 Project Number: [none] Fair Oaks CA, Project Manager: Dave Sendek Reported: 10/30/14 14:32 SSAT-0037 T (Air) Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes TO-15 Acetone ND 12 ug/m³ Air /24/14 10/27/14 1,3-Butadiene ND 4.5 Carbon Disulfide ND 3.2 1,1,2-trichloro-1,2,2-trifluoroethane ND 7.7 (CFC 113) Isopropyl alcohol ND 13 Bromodichloromethane ND 6.8 Bromoform ND 11 Bromomethane ND 4.0 Carbon tetrachloride ND 6.4 Chlorobenzene ND 4.7 Chloroethane ND 2.7 Chloroform ND 5.0 Chloromethane ND 11 Cyclohexane ND 3.5 Heptane ND 4.2 Hexane ND 3.6 Dibromochloromethane ND 8.7 1,2-Dibromoethane (EDB) ND 7.8 1,2-Dichlorobenzene ND 6.1 1,3-Dichlorobenzene ND 6.1 1,4-Dichlorobenzene ND 6.1 Dichlorodifluoromethane ND 5.0 1,1-Dichloroethane ND 4.1 1,2-Dichloroethane ND 4.1 1,1-Dichloroethene ND 4.0 cis-1,2-dichloroethene ND 4.0 trans-1,2-dichloroethene ND 4.0 1,2-Dichloropropane ND 4.7 cis-1,3-dichloropropene ND 4.6 trans-1,3-dichloropropene ND Ethyltoluene ND 5.0 TO-15 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Daniel Chavez, Project Manager Page 2 of 12

20 25712 Commercentre Drive Lake Forest, California Phone Fax Versar -- Fair Oaks Project: Nick on Sunset 5330 Primrose Dr. #147 Project Number: [none] Fair Oaks CA, Project Manager: Dave Sendek Reported: 10/30/14 14:32 SSAT-0037 T (Air) Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes TO-15 Methylene chloride ND 3.5 ug/m³ Air /24/14 10/27/14 Styrene ND 4.3 1,1,2,2-Tetrachloroethane ND 7.0 Tetrahydrofuran ND 3.0 Tetrachloroethene ND 6.9 1,1,2-Trichloroethane ND 5.6 1,1,1-Trichloroethane ND 5.6 Trichloroethene ND 5.5 Trichlorofluoromethane ND 5.7 1,3,5-Trimethylbenzene ND 5.0 1,2,4-Trimethylbenzene Vinyl acetate ND 3.6 Vinyl chloride ND 2.6 1,4-Dioxane ND 18 2-Butanone (MEK) ND 15 Methyl isobutyl ketone ND 42 Benzene ND 3.3 Toluene ND 3.8 Ethylbenzene ND 4.4 m,p-xylene o-xylene ND 4.4 Surrogate: 4-Bromofluorobenzene 62.1 % TO-15 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Daniel Chavez, Project Manager Page 3 of 12

21 25712 Commercentre Drive Lake Forest, California Phone Fax Versar -- Fair Oaks Project: Nick on Sunset 5330 Primrose Dr. #147 Project Number: [none] Fair Oaks CA, Project Manager: Dave Sendek Reported: 10/30/14 14:32 SSAT-0023 T (Air) Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes TO-15 Acetone ND 12 ug/m³ Air /24/14 10/27/14 1,3-Butadiene ND 4.5 Carbon Disulfide ND 3.2 1,1,2-trichloro-1,2,2-trifluoroethane ND 7.7 (CFC 113) Isopropyl alcohol ND 13 Bromodichloromethane ND 6.8 Bromoform ND 11 Bromomethane ND 4.0 Carbon tetrachloride ND 6.4 Chlorobenzene ND 4.7 Chloroethane ND 2.7 Chloroform ND 5.0 Chloromethane ND 11 Cyclohexane ND 3.5 Heptane ND 4.2 Hexane ND 3.6 Dibromochloromethane ND 8.7 1,2-Dibromoethane (EDB) ND 7.8 1,2-Dichlorobenzene ND 6.1 1,3-Dichlorobenzene ND 6.1 1,4-Dichlorobenzene ND 6.1 Dichlorodifluoromethane ND 5.0 1,1-Dichloroethane ND 4.1 1,2-Dichloroethane ND 4.1 1,1-Dichloroethene ND 4.0 cis-1,2-dichloroethene ND 4.0 trans-1,2-dichloroethene ND 4.0 1,2-Dichloropropane ND 4.7 cis-1,3-dichloropropene ND 4.6 trans-1,3-dichloropropene ND Ethyltoluene ND 5.0 TO-15 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Daniel Chavez, Project Manager Page 4 of 12

22 25712 Commercentre Drive Lake Forest, California Phone Fax Versar -- Fair Oaks Project: Nick on Sunset 5330 Primrose Dr. #147 Project Number: [none] Fair Oaks CA, Project Manager: Dave Sendek Reported: 10/30/14 14:32 SSAT-0023 T (Air) Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes TO-15 Methylene chloride ND 3.5 ug/m³ Air /24/14 10/27/14 Styrene ND 4.3 1,1,2,2-Tetrachloroethane ND 7.0 Tetrahydrofuran ND 3.0 Tetrachloroethene ND 6.9 1,1,2-Trichloroethane ND 5.6 1,1,1-Trichloroethane ND 5.6 Trichloroethene ND 5.5 Trichlorofluoromethane ND 5.7 1,3,5-Trimethylbenzene ND 5.0 1,2,4-Trimethylbenzene Vinyl acetate ND 3.6 Vinyl chloride ND 2.6 1,4-Dioxane ND 18 2-Butanone (MEK) ND 15 Methyl isobutyl ketone ND 42 Benzene ND 3.3 Toluene Ethylbenzene ND 4.4 m,p-xylene o-xylene ND 4.4 Surrogate: 4-Bromofluorobenzene 61.0 % TO-15 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Daniel Chavez, Project Manager Page 5 of 12

23 25712 Commercentre Drive Lake Forest, California Phone Fax Versar -- Fair Oaks Project: Nick on Sunset 5330 Primrose Dr. #147 Project Number: [none] Fair Oaks CA, Project Manager: Dave Sendek Reported: 10/30/14 14:32 SSAT-0138 T (Air) Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes TO-15 Acetone ND 12 ug/m³ Air /24/14 10/27/14 1,3-Butadiene ND 4.5 Carbon Disulfide ND 3.2 1,1,2-trichloro-1,2,2-trifluoroethane ND 7.7 (CFC 113) Isopropyl alcohol ND 13 Bromodichloromethane ND 6.8 Bromoform ND 11 Bromomethane ND 4.0 Carbon tetrachloride ND 6.4 Chlorobenzene ND 4.7 Chloroethane ND 2.7 Chloroform ND 5.0 Chloromethane ND 11 Cyclohexane ND 3.5 Heptane ND 4.2 Hexane ND 3.6 Dibromochloromethane ND 8.7 1,2-Dibromoethane (EDB) ND 7.8 1,2-Dichlorobenzene ND 6.1 1,3-Dichlorobenzene ND 6.1 1,4-Dichlorobenzene ND 6.1 Dichlorodifluoromethane ND 5.0 1,1-Dichloroethane ND 4.1 1,2-Dichloroethane ND 4.1 1,1-Dichloroethene ND 4.0 cis-1,2-dichloroethene ND 4.0 trans-1,2-dichloroethene ND 4.0 1,2-Dichloropropane ND 4.7 cis-1,3-dichloropropene ND 4.6 trans-1,3-dichloropropene ND Ethyltoluene ND 5.0 TO-15 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Daniel Chavez, Project Manager Page 6 of 12

24 25712 Commercentre Drive Lake Forest, California Phone Fax Versar -- Fair Oaks Project: Nick on Sunset 5330 Primrose Dr. #147 Project Number: [none] Fair Oaks CA, Project Manager: Dave Sendek Reported: 10/30/14 14:32 SSAT-0138 T (Air) Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes TO-15 Methylene chloride ND 3.5 ug/m³ Air /24/14 10/27/14 Styrene ND 4.3 1,1,2,2-Tetrachloroethane ND 7.0 Tetrahydrofuran ND 3.0 Tetrachloroethene ,1,2-Trichloroethane ND 5.6 1,1,1-Trichloroethane ND 5.6 Trichloroethene ND 5.5 Trichlorofluoromethane ND 5.7 1,3,5-Trimethylbenzene ND 5.0 1,2,4-Trimethylbenzene ND 5.0 Vinyl acetate ND 3.6 Vinyl chloride ND 2.6 1,4-Dioxane ND 18 2-Butanone (MEK) ND 15 Methyl isobutyl ketone ND 42 Benzene ND 3.3 Toluene ND 3.8 Ethylbenzene ND 4.4 m,p-xylene ND 8.8 o-xylene ND 4.4 Surrogate: 4-Bromofluorobenzene 60.8 % TO-15 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Daniel Chavez, Project Manager Page 7 of 12

25 25712 Commercentre Drive Lake Forest, California Phone Fax Versar -- Fair Oaks Project: Nick on Sunset 5330 Primrose Dr. #147 Project Number: [none] Fair Oaks CA, Project Manager: Dave Sendek Reported: 10/30/14 14:32 TO-15 - Quality Control Analyte Result Reporting Limit Units Spike Level Source Result %REC %REC Limits RPD RPD Limit Notes Batch EPA 5030 GCMS Blank ( BLK1) Prepared: 10/24/14 Analyzed: 10/27/14 Acetone ND 12 ug/m³ Air 1,3-Butadiene ND 4.5 Carbon Disulfide ND 3.2 1,1,2-trichloro-1,2,2-trifluoroethane (CFC ND ) Isopropyl alcohol ND 13 Bromodichloromethane ND 6.8 Bromoform ND 11 Bromomethane ND 4.0 Carbon tetrachloride ND 6.4 Chlorobenzene ND 4.7 Chloroethane ND 2.7 Chloroform ND 5.0 Chloromethane ND 11 Cyclohexane ND 3.5 Heptane ND 4.2 Hexane ND 3.6 Dibromochloromethane ND 8.7 1,2-Dibromoethane (EDB) ND 7.8 1,2-Dichlorobenzene ND 6.1 1,3-Dichlorobenzene ND 6.1 1,4-Dichlorobenzene ND 6.1 Dichlorodifluoromethane ND 5.0 1,1-Dichloroethane ND 4.1 1,2-Dichloroethane ND 4.1 1,1-Dichloroethene ND 4.0 cis-1,2-dichloroethene ND 4.0 trans-1,2-dichloroethene ND 4.0 1,2-Dichloropropane ND 4.7 cis-1,3-dichloropropene ND 4.6 trans-1,3-dichloropropene ND Ethyltoluene ND 5.0 Methylene chloride ND 3.5 Styrene ND 4.3 1,1,2,2-Tetrachloroethane ND 7.0 Tetrahydrofuran ND 3.0 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Daniel Chavez, Project Manager Page 8 of 12

26 25712 Commercentre Drive Lake Forest, California Phone Fax Versar -- Fair Oaks Project: Nick on Sunset 5330 Primrose Dr. #147 Project Number: [none] Fair Oaks CA, Project Manager: Dave Sendek TO-15 - Quality Control Reported: 10/30/14 14:32 Analyte Result Reporting Limit Units Spike Level Source Result %REC %REC Limits RPD RPD Limit Notes Batch EPA 5030 GCMS Blank ( BLK1) Prepared: 10/24/14 Analyzed: 10/27/14 Tetrachloroethene ND 6.9 ug/m³ Air 1,1,2-Trichloroethane ND 5.6 1,1,1-Trichloroethane ND 5.6 Trichloroethene ND 5.5 Trichlorofluoromethane ND 5.7 1,3,5-Trimethylbenzene ND 5.0 1,2,4-Trimethylbenzene ND 5.0 Vinyl acetate ND 3.6 Vinyl chloride ND 2.6 1,4-Dioxane ND 18 2-Butanone (MEK) ND 15 Methyl isobutyl ketone ND 42 Benzene ND 3.3 Toluene ND 3.8 Ethylbenzene ND 4.4 m,p-xylene ND 8.8 o-xylene ND 4.4 Surrogate: 4-Bromofluorobenzene Duplicate ( DUP1) Source: T Prepared: 10/24/14 Analyzed: 10/27/14 Acetone ug/m³ Air ,3-Butadiene ND 4.5 Carbon Disulfide ND 3.2 1,1,2-trichloro-1,2,2-trifluoroethane (CFC ND ) Isopropyl alcohol ND 13 Bromodichloromethane ND 6.8 Bromoform ND 11 Bromomethane ND 4.0 Carbon tetrachloride ND 6.4 Chlorobenzene ND 4.7 Chloroethane ND 2.7 Chloroform ND 5.0 Chloromethane ND 11 Cyclohexane ND 3.5 Heptane ND 4.2 The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Daniel Chavez, Project Manager Page 9 of 12

27 25712 Commercentre Drive Lake Forest, California Phone Fax Versar -- Fair Oaks Project: Nick on Sunset 5330 Primrose Dr. #147 Project Number: [none] Fair Oaks CA, Project Manager: Dave Sendek TO-15 - Quality Control Reported: 10/30/14 14:32 Analyte Result Reporting Limit Units Spike Level Source Result %REC %REC Limits RPD RPD Limit Notes Batch EPA 5030 GCMS Duplicate ( DUP1) Source: T Prepared: 10/24/14 Analyzed: 10/27/14 Hexane ND 3.6 ug/m³ Air Dibromochloromethane ND 8.7 1,2-Dibromoethane (EDB) ND 7.8 1,2-Dichlorobenzene ND 6.1 1,3-Dichlorobenzene ND 6.1 1,4-Dichlorobenzene ND 6.1 Dichlorodifluoromethane ND 5.0 1,1-Dichloroethane ND 4.1 1,2-Dichloroethane ND 4.1 1,1-Dichloroethene ND 4.0 cis-1,2-dichloroethene ND 4.0 trans-1,2-dichloroethene ND 4.0 1,2-Dichloropropane ND 4.7 cis-1,3-dichloropropene ND 4.6 trans-1,3-dichloropropene ND Ethyltoluene ND 5.0 Methylene chloride ND 3.5 Styrene ND 4.3 1,1,2,2-Tetrachloroethane ND 7.0 Tetrahydrofuran ND 3.0 Tetrachloroethene ,1,2-Trichloroethane ND 5.6 1,1,1-Trichloroethane ND 5.6 Trichloroethene ND 5.5 Trichlorofluoromethane ND 5.7 1,3,5-Trimethylbenzene ND 5.0 1,2,4-Trimethylbenzene Vinyl acetate ND 3.6 Vinyl chloride ND 2.6 1,4-Dioxane ND 18 2-Butanone (MEK) Methyl isobutyl ketone ND 42 Benzene ND 3.3 Toluene Ethylbenzene m,p-xylene The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Daniel Chavez, Project Manager Page 10 of 12

28 25712 Commercentre Drive Lake Forest, California Phone Fax Versar -- Fair Oaks Project: Nick on Sunset 5330 Primrose Dr. #147 Project Number: [none] Fair Oaks CA, Project Manager: Dave Sendek TO-15 - Quality Control Reported: 10/30/14 14:32 Analyte Result Reporting Limit Units Spike Level Source Result %REC %REC Limits RPD RPD Limit Notes Batch EPA 5030 GCMS Duplicate ( DUP1) Source: T Prepared: 10/24/14 Analyzed: 10/27/14 o-xylene ug/m³ Air Surrogate: 4-Bromofluorobenzene The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Daniel Chavez, Project Manager Page 11 of 12

29 25712 Commercentre Drive Lake Forest, California Phone Fax Versar -- Fair Oaks Project: Nick on Sunset 5330 Primrose Dr. #147 Project Number: [none] Fair Oaks CA, Project Manager: Dave Sendek Reported: 10/30/14 14:32 Notes and Definitions DET ND NR dry RPD Analyte DETECTED Analyte NOT DETECTED at or above the reporting limit Not Reported Sample results reported on a dry weight basis Relative Percent Difference The results in this report apply to the samples analyzed in accordance with the chain of custody document. This analytical report must be reproduced in its entirety. Daniel Chavez, Project Manager Page 12 of 12

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