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a <br /> TABLE 1: LABORATORY ANALYSIS RESULTS FROM 10,000 GALLON DIESEL TANK EXCAVATION ' <br /> AND PIPE TRENCH SOIL SAMPLING AT EDISON HIGH SCHOOL <br /> STOCKTON UNIFIED SCHOOL DISTRICT <br /> H LI 00817 <br /> Sample Date. Location' Depth' TEPH Benzene Toluene Ethylbenzene Xylene OVA Reading` <br /> Collected (mg/Kg) (ug/Kg) (ug/Kg) (ug/Kg) (ug/Kg) (ppm) <br /> 014 11/19/90 Corner of 12.5 ft 9.9 <1 <1 <1 <1 0 <br /> Tank#1 <br /> 015 11/19/90 Comer of 12.5 ft <1 <1 <1 <1 <1 0 <br /> Tank#1 s ` <br /> 016 11/21190 Corner of 13 ft 20 <1 <1 <1 <1 0 <br /> Tank#1 <br /> 017 11/21/90 North Side 12.5 ft 290 <1 <1 <1 <1 0 <br /> of Tank#1 <br /> 018 11/21/90 Piping#1 4 ft <1 <1 <1 4 30 12 <br /> 019 11/21/90 Piping#2 3.5 ft <1 <1 <1 <1 <1 1 <br /> 021 11/21/90 Piping#4 4 ft <1 <1 <1 <1 <1 0 <br /> 022 11/21/90 Piping#5 4.5 ft <1 <1 <1 <1 <1 0 <br /> 023 11/21/90 Piping#6 4 ft <1 <1 <1 <1 <1 0 <br /> 024 11/21/90 Piping#7 4 ft <1 <1 <1 <1 <1 0 <br /> 025 1216/90 Center of 14 ft 430 <1 <1 <1 <3 NA <br /> Tank#1 <br /> a. Refer to Figures 1 and 2 for approximate locations of tanks and sample locations. Tank No. 1 = 10,000-gallon diesel tank. <br /> b. Depth below existing ground surface at time of sampling <br /> c. Concentration in container headspace as measured in the field with a Heath Detecto-Pak 2 portable OVA equipped <br /> with a flame ionization detector. Concentrations are expressed in parts per million (ppm) by volume as methane equivalent. <br /> NA= Not Analyzed <br /> "<" = Laboratory Limit of Detection <br />