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Lit--i Environmental Site Assessment Report
<br /> 20 E.Lindsay Street,Stockton,CA
<br /> June 24,2004
<br /> Page 4
<br /> Each soil sample selected for potential laboratory analyses was cut from the liner. The soil samples were
<br /> retained, undisturbed, in the liners. The liners were sealed at the ends with Teflon® sheeting, capped, and
<br /> labeled. The samples were stored in a cooler chilled with Blue Ice®and delivered under chain-of-custody
<br /> procedures to Argon Laboratories (Argon) of Ceres, California. The samples were analyzed using U.S.
<br /> EPA Methods and California-approved methods.
<br /> 3.3 LABORATORY ANALYSES
<br /> The soil samples selected for analysis were analyzed for total petroleum hydrocarbons quantified as
<br /> gasoline (TPH-G), total extractable petroleum hydrocarbons (TEPH) quantified as diesel (TEPH-D),
<br /> TEPH quantified as motor oil (TEPH-MO), and TEPH quantified as kerosene(TEPH-K)by EPA Method
<br /> 8015B; benzene, toluene, ethyl benzene, total xylenes (BTEX), and selected gasoline
<br /> oxygenates/additives by EPA Method 8260B; semi-volatile organic compounds (SVOCs) by EPA
<br /> Method 8270C, and the CAM 17 Metals by EPA Methods 6010C and 7471A. The selected gasoline
<br /> additives/oxygenates include tertiary-butanol (TBA), methyl tertiary-butyl ether (MTBE), di-isopropyl
<br /> ether (DIPE), ethyl tertiary-butyl ether (ETBE), tertiary-amyl methyl ether (TAME), and 1,2-
<br /> dichloroethane(1,2-DCA).
<br /> 4.0 INVESTIGATION RESULTS
<br /> The results of the soil investigation include field observations and laboratory analytical results for the soil
<br /> samples.
<br /> 4.1 FIELD OBSERVATIONS
<br /> Field observations included direct push boring observations, PID screening results, detection of sample
<br /> odors, and visual observations of the site geology. Field observations are included on the geological logs
<br /> prepared for the borings (Appendix Q.
<br /> Soils encountered at the site were predominantly clays and silts. Gravel lenses were noted in boring GP-4
<br /> at 6.1-6.2 feet, 6.5-6.8 feet, 8.9-9.5 feet, and 12-12.2 feet bgs.No petroleum hydrocarbon staining of soils
<br /> was observed in the borings. No odors were identified in the field inspection of soil samples collected
<br /> from borings GP-1, GP-2, GP-4, and GP-5. A possible weak motor oil odor was noted in the soils from
<br /> GP-3 at eight inches bgs.
<br /> 4.2 RESULTS OF LABORATORY ANALYSES
<br /> As no odors were detected in a majority of the soil samples, only the uppermost soil samples collected
<br /> were submitted to the laboratory for analysis. TPH-G, TEPH-D, TEPH-MO, TEPH-K, BTEX, the
<br /> selected gasoline oxygenates/additives, and SVOCs were not detected in the soil samples collected from
<br /> 3.5 to 4.0 feet bgs. Antimony, arsenic,beryllium, cadmium, mercury, selenium, silver, and thallium were
<br /> not detected in any of the soil samples analyzed for the CAM 17 Metals.The laboratory analytical results
<br /> for the detected metals are presented in Table 1, below. Copies of laboratory analytical results and chain-
<br /> of-custody records for the samples are included in Appendix D.
<br /> is CONDOR
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