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TABLE 1: LABORATORY ANALYSIS RESULTS FROM TANK D(CAVATION <br /> AND PIPE TRENCH SOIL SAMPLING AT THE CORPORATION YARD <br /> STOCKTON UNIFIED SCHOOL DISTRICT <br /> HLI 0089002 <br /> 1990 Oil & Fuel Storage Tank Project <br /> Sample Hate Location Depth TEPH Benzene Toluene Ethyl benzene Xylenes Chlorinated Semi d OIIAe <br /> Collected (ft) (mg/Kg) (ug/Kg) (ug/Kg) (ug/Kg) (ug/Kg) Hydrocarbons Volatile Reading <br /> (ug/Kg) Organics (ppm) <br /> (ug/Kg) <br /> 059 1/14/91 Center of Tank #5 10 NA <1 1 <1 10 ND NA NA <br /> 060 1/14/91 Center of Tank #4 10 <1 <1 <1 <1 <1 NA NA NA <br /> 061 1/14/91 Piping - Tanks #4 4 53 <1 <1 <1 <1 ND NA NA <br /> 7 and 5 Combined <br /> 052/063 1/14/91 West Side of Tank #8 11 <7 <1 <1 <1 <1 ND ND NA <br /> 054/065 1/14/91 East Side of Tank #B 11 <1 <1 <1 <1 <1 ND NO NA <br /> 066 1/15/91 Remote Fill #1 4 ]E17 <50 70 760 2700 NA NA NA <br /> 067 1/15/91 Remote Fill #2 4.5 <1 <1 <1 <1 <1 NA NA NA <br /> 068 1/15/91 Remote Fill #3 4.5 1400 <1 <l <1 <1 NA NA NA <br /> 069 1/15/91 Remote Fill #4 5.5 5200 <5 <5 <5 <5 NA NA <br /> Sample Date Locationa Depthb Total Cadmium Lead Nickel Zinc <br /> Collected (ft) Chromium (mg/1) (mg/1) (Mg/1) (mg/1) 4 <br /> (mg/1) <br /> 062 1/14/91 West Side of Tank #8 11 <0.1 <0.05 <0.5 0.12 0.49 <br /> 063 1/14/91 West Side of Tank #B 11 <0.1 105 <0.5 0.18 1.9 -- -- __ <br /> 064 1/14/91 East Side of Tank #8 11 <0.1 <0.05 4.5 0.11 0.41 <br /> 065 1/14/91 East Side of Tank #8 1 11 <0.1 <0.05 <0.5 .0.15 2.5 -- -- __ <br /> 1 a. Refer to Figures 1, 2, 3 and 4 for approximate locations of tanks and sample locations, Tanks No. 4 is a 500-gallon diesel tank, Tank No. 5 is a <br /> 500-gallon solvent tank, Tank No. 8 is a 1000-gallon waste oil tank. <br /> b. depth below existing ground surface at time of sampling. <br /> C. Clorinated hydrocarbons by EPA Method 8010. Detection limits for all constituents is 1 um/Kg. <br /> I <br /> d. Semi-Volatile Organics by EPA Method 8270. Detection limits for constituents vary between 330 and 1600 ug/Kg. <br /> a. Concentration in container headspace as measured in the field with a Porta-FID portable OVA equipped with a flame ionization detector. Concentrations <br /> are expressed in parts per million (ppm) by volume as methane equivalent. <br /> TEPH Semivolatile Petroleum Hydrocarbons diesel fuel standards <br /> TPH-G = Total Petroleum Hydrocarbons as gasoline <br />? NA = Not Analyzed <br /> "<" = Laboratory Limit of Detection <br />