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NMI JM Edr Er <br />TABLE 1: LABORATORY ANALYSIS RESULTS FROM TANK EXCAVATION <br />AND PIPE TRENCH SOIL SAMPLING AT T11E CORPORATION YARD <br />STOCKTON UNIFIED SCHOOL DISTRICT <br />HLI 0089002 <br />1 QQn n4 1 9 V-1 C!4-- --..1, rn1, 'n ..A.- -4- <br />Sample <br />Date <br />Collected <br />Locationa <br />Depth <br />(ft) <br />TEPH <br />(mg/Kg) <br />Benzene <br />(ug/Kg) <br />Toluene <br />(ug/Kg) <br />Eth lbenzene <br />Y <br />(ug/Kg) <br />Xylenes <br />(ug/Kg) <br />Chlorinatedc <br />Hydrocarbons <br />(ug/Kg) <br />Sem i -d <br />Volatile <br />Organics <br />(u9/Kg) <br />OVAe <br />Reading <br />(Ppm) <br />059 <br />1/14/91 <br />Center of Tank <br />10 <br />NA <br /><1 <br />1 <br /><1 <br />10 <br />ND <br />NA <br />ND <br />NA <br />NA <br />NA <br />ND <br />ND <br />NA <br />NA <br />NA <br />NA <br />NA <br />060 <br />1/14/91 <br />Center of Tank #4 <br />10 <br /><1 <br /><1 <br /><1 <br /><1 <br /><1 <br />061 <br />1/14/91 <br />Piping - Tanks #4 <br />and 5 Combined <br />4 <br />53 <br /><1 <br /><1 <br /><1 <br /><1 <br />062/063 <br />1/14/91 <br />West Side of Tank #8 <br />11 <br /><1 <br /><1 <br /><1 <br /><1 <br /><1 <br />ND <br />ND <br />064/065 <br />1/14/91 <br />East Side of Tank #8 <br />11 <br /><1 <br /><1 <br /><1 <br /><1 <br /><1 <br />066 <br />1/15/91 <br />Remote Fill #1 <br />4 <br />17 <br /><50 <br />70 <br />760 <br />2700 <br />NA <br />NA <br />NA <br />NA <br />NA <br />067 <br />1/15/91 <br />Remote Fill #2 <br />4.5 <br /><1 <br /><1 <br /><1 <br /><1 <br />-<1 <br />NA <br />068 <br />1/15/91 <br />Remote Fill #3 <br />4.5 <br />1400 <br /><1 <br /><1 <br /><1 <br /><1 <br />NA <br />NA <br />NA <br />NA <br />NA <br />069 <br />1/15/91 <br />Remote Fill #4 <br />5.5 <br />5200<5 <br /><5 <br /><5 <br /><5 <br />Sample <br />Date <br />Collected <br />Location' <br />Depthb <br />(ft) <br />Total <br />Chromium <br />(m9/1) <br />Cadmium <br />(mg/1) <br />Lead <br />(m9/1) <br />Nickel <br />(mg/1) <br />Zinc <br />(mg/1) <br />— <br />-- <br />— <br />062 <br />063 <br />1/14/91 <br />1/14/91 <br />West Side of Tank #8 <br />West Side of Tank #8 <br />11 <br />11 <br /><O.1 <br /><0.1 <br /><0.05 <br /><0.05 <br /><0.5 <br /><0.5 <br />0.12 <br />0.18 <br />0.49 <br />1.9 <br />064 <br />065 <br />1/14/91 <br />1/14/91 <br />East Side of Tank #8 <br />East Side of Tank #8 <br />11 <br />11 <br /><0.1 <br /><0.1 <br /><0.05 <br /><0.05 <br /><0.5 <br /><0.5 <br />[_00.11 <br />.15 <br />0.41 <br />2.5 <br />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 />d. Semi -Volatile Organics by EPA Method 8270. 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 />