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f. ' e Jul i.+n Munoz 5 ;vclss ASSOCIATES K4 Febraary 10, 1988 oe or The native soil samples were collected from Cher esckintoet ofChe side'of the from the clamshell and were taken about 5 in.h at three of the excavation (Figure 1, noted wi.t], "A" ruffir. on sample ID) and, sample locations, samples were collected about 18 inches into the side of the F The s:..aples we" 1 excavati.n ffigute 1, noted with "B" suffix on sample IO) . tak'-n immediately adjacent to and below the edge of the cone?'ete slab at tie ' c1 bottom of the excave�.ion. es �nd`lahleds The samples wr:re taken in steam tubes, sealed with aluminum foil, plastic end caps and duct tape and refrigerated until delivery under chain of custocly to B&C for analysis. Chain of custody forms for all samples are presented in Attachment A. ANALYTIC RE�IJLTS are shown, in Table 1 and laboratory analytic reports are Analytic r^'ults presented as Attachment B. The samples taken 6 inches Modified ed walls lMethodoB015 � composite of rite pea gray el sample were analyzed by gas chromatography with flame ionization detection (GC/FID) for total fuel limit of 10 ppm. Analyti.- results ranged hydrocarbons (TFHC) with a detection from ND (not detected) for samples IF-N-lA and TP-N sou from the rnof atle to 3,700 ppm for sample TP-N-7A from the southwestern corner ad acent to excavation. The composite pea gravel samples, TP-B-2. and TP-B-3, 1 the water lines, contained 450 ppm 'TFHC. for Tank Excavation Sampling, Safeway 4eat Packing, TABLE 1, Analytic Results Stockton, (ate-_farnia T Analytic Results Depth Total Fuel Hydrocarbons Sample ID (ft) (ppm) 450 TP-B-2,34' 6 (composite) 13 <10 TP-N-IA 13 <10 TP-N-kA 65 TP_-N-5A 12 5 __ 50 TP-N-6A 13 3,7C0 TP-N-7A a QackfilI sample