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46 <br /> TABLE 1: LABORATORY ANALYSIS RESULTS FROM TANK EXCAVATION <br /> AND PIPE TRENCH SOIL SAMPLING AT THE CORPORATION YARD <br /> STOCKTON UNIFIED SCHOOL. DISTRICT <br /> HLI 0089002 <br /> Sample Date Location Depth TEPH Benzene Toluene Ethiylbenzene Xylenes Qilorinatedc Sena d OVAe <br /> Collected (ft) (mg/Kg) (ug/Kg) (ug/Kg) (ug/Kg) (u9/K9) i(ydrorarhons Votati le Reading <br /> (ug/Kq) Organist (ppm) <br /> 41?� <br /> a/< <1 1 <1 10 ND NA NA <br /> 059 1/14/91 Center of Tank 10 NA <br /> 060 1/14/91 Center of Tank N4 10 <br /> <1 <1 <1 <1 <1 NA NA NA <br /> 061 1/14/91 Piping - Tanks N4 4 <br /> 53 <1 <1 <br /> and 4 Combined <br /> 1 <1 <1 ND ND NA <br /> 062/063 1/14/91 West Si a of Tank Ne 11 <1 <1 < Np NA <br /> 1 <1 ND <br /> 064/065 1/14/91 East Side of Tank NB 11 <1 <1 <1 < NA NA <br /> 066 1/15/91 Remote Fill k1 4 17 <50 70 ,760 2J00 NA <br /> <1 <1 <1 <1 NA NA NA <br /> 067 1/15/91 Remote Fill $2 4 <1.5 NA NA <br /> 4.5 7400 <1 <1 <1 c1 NA <br /> 068 1/15/91 Remote fill N3 NA <br /> 069 rl <br /> 75/9i Remote Fill N4 5.5 5200 <br /> <5 <5 <5 <5 NA <br /> Sample Date Location, Depthb Total Cadmium Lead Nickel Zinc <br /> Collected (ft) Chro 1)( mg/1) (mg/1) (mg/1) (mg/1) <br /> <U.1 <0.05 <0.5 0.12 0.49 -- _- <br /> 062 1/14/91 West Side of Tank 08 11 -0.05 <0.5 0.18 1.9 -- -' <br /> <0.1 <br /> -� - _- -� ----063 =1/_14/91 . _West_Side of Tank NB it _--- _ <br /> 0.11 .-..` 0:41- <br /> 064 1/14/91 East Side of Tank <br /> <0.5 <br /> 065 1/14/91 East Side of Tank NB 11 4.12.5 <br /> a Refer to Fisolven1, 2, 3 and 4 for <br /> 8aps oximate locations <br /> sto oil tank sample locations. Tanks No. 4 is a 500-gallon diesel tank, Tank No. 5 is a. <br /> o. <br /> allon <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 /> d. Semi-Volatile Organics by EPAMethod8270. Detection limits for constituents vary between.330 and 1600 ug/Kg. <br /> e. 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 />