Quality Assurance
5-Point Calibration
The initial five-point calibration consisted of 20, 50, 100, 200 and 500 ul injections of the calibration standard. A calibration factor on each analyte was generated using a best fit line method using the Agilent data system. If the r2
factor generated from this line was not greater
than 0.990, an additional five-point calibration would have been performed. Method reporting limits were calculated to be 0.001-1.0 micrograms per Liter (ug/L) for the individual compounds.
A daily calibration check was performed using a pre-mixed standard supplied by Scotty Analyzed Gases. The standard contained common halogenated solvents and aromatic hydrocarbons (see Table 1). The individual compound concentrations in the standards ranged between 0.025 nanograms per microliter (ng/ul) and 0.25 ng/ul.
TABLE 1
Dichlorodifluoromethane Carbon Tetrachloride Chloroethane Trichlorofluoromethane 1,2-Dichloroethane Benzene
1,1-Dichloroethene Trichloroethene Toluene
Methylene Chloride 1,1,2-Trichloroethane Ethylbenzene
trans-1,2-Dichloroethene Tetrachloroethene m-/p-Xylene
1,1-Dichloroethane Chloroform o-Xylene
cis-1,2-Dichloroethene 1,1,1,2-Tetrachloroethane Vinyl Chloride 1,1,1-Trichloroethane 1,1,2,2-Tetrachloroethane Freon 113 4-Methyl-2-Pentanone Cyclohexane Acetone
Chlorobenzene 2-Butanone Isobutane
Sample Replicates
A replicate analysis (duplicate) was run to evaluate the reproducibility of the sampling system and instrument. The difference between samples did not vary more than 20%.
Equipment Blanks
Blanks were run at the beginning of each workday and after calibrations. The blanks were collected using an ambient air sample. These blanks checked the septum, syringe, GC column, GC detector and the ambient air. Contamination was not found in any of the blanks analyzed during this investigation. Blank results are given along with the sample results.
Tracer Gas Leak Test
A tracer gas was applied to the soil gas probes at each point of connection in which ambient air could enter the sampling system. These points include the top of the sampling probe where the tubing meets the probe connection and the surface bentonite seals. Isobutane was used as the tracer gas. No Isobutane was found in any of the samples collected.
Purge Volume
The standard purge volume of three volumes was purged in accordance with the July 2015 DTSC/RWQCB Advisory for Active Soil Gas Investigations.
Shut-in Test
A shut-in test was conducted prior to purging or sampling each location to check for leaks in the above-ground sampling system. The system was evaluated to a minimum measured vacuum of 100 inches of water. The vacuum gauge was calibrated and sensitive enough to indicate a water pressure change of at least 0.5 inches.
Scope of Work
To achieve the objective of this investigation a total of 9 vapor samples were collected from 8 locations at the site. Sampling depths, vacuum readings, purge volume and sampling volumes are given on the analytical results page. All the collected vapor samples were analyzed on-site using Optimal’s mobile laboratory.
Subsurface Conditions
Subsurface soil conditions at this site offered sampling flows at 0” water vacuum.
Results
During this vapor investigation, two samples contained levels of Benzene ranging from 0.039 ug/L to 0.052 ug/L. None of the other compounds listed in Table 1 above were detected above the listed reporting limits. A complete table of analytical results is included with this report.
Disclaimer
All conclusions presented in this letter are based solely on the information collected by the soil vapor survey conducted by Optimal Technology. Soil vapor testing is only a subsurface screening tool and does not represent actual contaminant concentrations in either the soil and/or groundwater. We enjoyed working with you on this project and look forward to future projects.
If you have any questions, please contact me at (877) 764-5427.
Sincerely,
Attila Baly
Project Manager
2369 Rutland Place, Thousand Oaks, CA 91362 • Toll Free (877) S 1667 Cross Bridge Place, Thousand Oaks, CA 91362 • Toll Free (877) SOIL GAS (764-5427) • (818) 734-6230 • Fax (818) 734-6235 OIL GAS (764-5427) • (818) 734-6230 • Fax (818) 734-6235
OPTIMAL TECHNOLOGY
Specializing in Environmental Field Services
SOIL VAPOR RESULTS
Site Name: 1600 W. Commonwealth Ave., Fullerton, CA Lab Name: Optimal Technology Date: 8/30/22 Analyst: A. Baly Collector: A. Baly Agilent 6890NF
Method: Modified EPA 8260B Agilent 5973N Mass Spectrometer Page: 1 of 2 BLANK-1 B1-SV-5 B2-SV-5 B3-SV-5 B4-SV-5 B5-SV-5 B6-SV-5 B7-SV-5 Sampling Depth (Ft.) N/A 5.0 5.0 5.0 5.0 5.0 5.0 5.0
Purge Volume (ml) N/A 1,500 1,500 1,500 1,500 1,500 1,500 1,500 Vacuum (in. of Water) N/A0 0 0 0 0 0 0
Injection Volume (ul) 100,000 100,000 100,000 100,000 100,000 100,000 100,000 100,000 Dilution Factor 11111111
COMPOUND REP. LIMIT CONC (ug/L) CONC (ug/L) CONC (ug/L) CONC (ug/L) CONC (ug/L) CONC (ug/L) CONC (ug/L) CONC (ug/L) Dichlorodifluoromethane 1.00 ND ND ND ND ND ND ND ND
Chloroethane 1.00 ND ND ND ND ND ND ND ND
Trichlorofluoromethane 1.00 ND ND ND ND ND ND ND ND
Freon 113 1.00 ND ND ND ND ND ND ND ND
Methylene Chloride 0.03 ND ND ND ND ND ND ND ND
1,1-Dichloroethane 0.05 ND ND ND ND ND ND ND ND
Chloroform 0.004 ND ND ND ND ND ND ND ND
1,1,1-Trichloroethane 1.00 ND ND ND ND ND ND ND ND
Carbon Tetrachloride 0.002 ND ND ND ND ND ND ND ND
1,2-Dichloroethane 0.003 ND ND ND ND ND ND ND ND
Trichloroethene (TCE) 0.01 ND ND ND ND ND ND ND ND
1,1,2-Trichloroethane 0.005 ND ND ND ND ND ND ND ND
Tetrachloroethene (PCE) 0.01 ND ND ND ND ND ND ND ND
1,1,1,2-Tetrachloroethane 0.01 ND ND ND ND ND ND ND ND
1,1,2,2-Tetrachloroethane 0.001 ND ND ND ND ND ND ND ND Vinyl Chloride 0.001 ND ND ND ND ND ND ND ND
Acetone 1.00 ND ND ND ND ND ND ND ND
1,1-Dichloroethene 1.00 ND ND ND ND ND ND ND ND
trans-1,2-Dichloroethene 1.00 ND ND ND ND ND ND ND ND
2-Butanone (MEK) 1.00 ND ND ND ND ND ND ND ND
cis-1,2-Dichloroethene 0.20 ND ND ND ND ND ND ND ND
Cyclohexane 1.00 ND ND ND ND ND ND ND ND
Benzene 0.003 ND ND ND ND ND 0.052 ND 0.039
4-Methyl-2-Pentanone 1.00 ND ND ND ND ND ND ND ND
Toluene 1.00 ND ND ND ND ND ND ND ND
Chlorobenzene 1.00 ND ND ND ND ND ND ND ND
Ethylbenzene 0.03 ND ND ND ND ND ND ND ND
m/p-Xylene 1.00 ND ND ND ND ND ND ND ND
o-Xylene 1.00 ND ND ND ND ND ND ND ND
Isobutane (Tracer Gas) 1.00 ND ND ND ND ND ND ND ND
Note: ND = Below Listed Reporting Limit
Inst. ID:
Detector:
SAMPLE ID
2369 Rutland Place, Thousand Oaks, CA 91362 • Toll Free (877) S 1667 Cross Bridge Place, Thousand Oaks, CA 91362 • Toll Free (877) SOIL GAS (764-5427) • (818) 734-6230 • Fax (818) 734-6235 OIL GAS (764-5427) • (818) 734-6230 • Fax (818) 734-6235
OPTIMAL TECHNOLOGY
Specializing in Environmental Field Services
SOIL VAPOR RESULTS
Site Name: 1600 W. Commonwealth Ave., Fullerton, CA Lab Name: Optimal Technology Date: 8/30/22 Analyst: A. Baly Collector: A. Baly Agilent 6890NF
Method: Modified EPA 8260B Agilent 5973N Mass Spectrometer Page: 2 of 2 B8-SV-5
B8-SV-5
Dup
Sampling Depth (Ft.) 5.0 5.0
Purge Volume (ml) 1,500 1,500
Vacuum (in. of Water) 00
Injection Volume (ul) 100,000 100,000
Dilution Factor 11
COMPOUND REP. LIMIT CONC (ug/L) CONC (ug/L)
Dichlorodifluoromethane 1.00 ND ND
Chloroethane 1.00 ND ND
Trichlorofluoromethane 1.00 ND ND
Freon 113 1.00 ND ND
Methylene Chloride 0.03 ND ND
1,1-Dichloroethane 0.05 ND ND
Chloroform 0.004 ND ND
1,1,1-Trichloroethane 1.00 ND ND
Carbon Tetrachloride 0.002 ND ND
1,2-Dichloroethane 0.003 ND ND
Trichloroethene (TCE) 0.01 ND ND
1,1,2-Trichloroethane 0.005 ND ND
Tetrachloroethene (PCE) 0.01 ND ND
1,1,1,2-Tetrachloroethane 0.01 ND ND
1,1,2,2-Tetrachloroethane 0.001 ND ND
Vinyl Chloride 0.001 ND ND
Acetone 1.00 ND ND
1,1-Dichloroethene 1.00 ND ND
trans-1,2-Dichloroethene 1.00 ND ND
2-Butanone (MEK) 1.00 ND ND
cis-1,2-Dichloroethene 0.20 ND ND
Cyclohexane 1.00 ND ND
Benzene 0.003 ND ND
4-Methyl-2-Pentanone 1.00 ND ND
Toluene 1.00 ND ND
Chlorobenzene 1.00 ND ND
Ethylbenzene 0.03 ND ND
m/p-Xylene 1.00 ND ND
o-Xylene 1.00 ND ND
Isobutane (Tracer Gas) 1.00 ND ND
Note: ND = Below Listed Reporting Limit
Inst. ID:
Detector:
SAMPLE ID
2369 Rutland Place, Thousand Oaks, CA 91362 • Toll Free (877) S 1667 Cross Bridge Place, Thousand Oaks, CA 91362 • Toll Free (877) SOIL GAS (764-5427) • (818) 734-6230 • Fax (818) 734-6235 OIL GAS (764-5427) • (818) 734-6230 • Fax (818) 734-6235
OPTIMAL TECHNOLOGY
Specializing in Environmental Field Services
CHAIN OF CUSTODY FORM
Page: 1 of 1
Site Name/Number PO# / Project Ref#
Site Address 1600 W. Commonwealth Ave., Fullerton, CA
Company Name
Contact Person(s): Phone# Email:
Comments:
TESTS REQUIRED (please mark with an "X")
Sample Sampling Date Time Soil Gas Soil Gas Soil Gas
Identification Device Collected Collected Mod 8260B Mod 8021B Mod 8015 BLANK-1 Syringe 8/30/22 7:21 AM x
B1-SV-5 Syringe 8/30/22 7:47 AM x
B2-SV-5 Syringe 8/30/22 8:10 AM x
B3-SV-5 Syringe 8/30/22 8:34 AM x
B4-SV-5 Syringe 8/30/22 8:57 AM x
B5-SV-5 Syringe 8/30/22 9:21 AM x
B6-SV-5 Syringe 8/30/22 9:45 AM x
B7-SV-5 Syringe 8/30/22 10:09 AM x
B8-SV-5 Syringe 8/30/22 10:32 AM x
B8-SV-5 Dup Syringe 8/30/22 10:32 AM x
Collected & Tested by:
Notes
Optimal Technology
1667 Cross Bridge Place
Thousand Oaks, CA 91362
Toll-free (877) SOIL GAS
Tel: (818) 734-6230 * Fax: (818) 734-6235
DATE: FIGURE
COMPANY: TITLE: 1
August 30, 2022
EFI Global
Soil Vapor Sampling Location Map
1600 W. Commonwealth Ave., Fullerton, CA
APPROXIMATE SCALE: 1" = 220'
0 110 220
Approximate Scale
Legend
B1-SV-5
- Soil Vapor Sample Location
- Soil Vapor Sample Number
B2-SV-5
B3-SV B1-SV-5 -5
W. Commonwealth Ave.
Railroad Tracks
B4-SV-5
B5-SV-5
B6-SV-5
B7-SV-5
B8-SV-5