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TABLE 1: LABORATORY ANALYSIS RESULTS FROM TANK EXCAVATION <br /> AND PIPE TRENCH SOIL SAMPLING AT STAGG HIGH SCHOOL <br /> i STOCKTON UNIFIED SCHOOL DISTRICT <br />' HLI 0089002 <br /> Sample Date Location' Depthb TEPH TPH-G Benzene Toluene Ethylbenzene Xylenes Ethylene Lead OVAL <br /> collected (ft) (mg/Kg) (mg/Kg) (ug/Kg) (ug/Kg) (ug/Kg) (ug/Kg) Dibnomide (mg/L) Reading <br /> (ug/Kg) (Ppm) <br /> 035 12/20/90 NE Corner of Tank #1 13 <1 NA <1 <1 <1 <1 NA NA <5 <br /> 036 12/20/90 NW Corner of Tank #1 13 <1 NA <1 <1 <1 <1 NA NA <5 <br /> 037 12/20/90 Piping #1 2.75 <1 NA <1 <1 <1 <1 NA NA <5 <br /> 038 12/20/90 Piping #2 2.8 <1 NA <1 <1 <1 <1 NA NA <5 % <br /> 039 12/20/90 SE Corner of Tank #1 14 1200 NA <1 <1 <1 <1 NA NA <5 <br /> 040 12/20/90 5W Corner of Tank #1 13 <1 NA <1 <1 <1 <1 NA NA <5 <br /> 041 12/20/90 Remote fill #1 3 <1 NA <1 <1 <1 <1 NA NA <5 <br /> 042 12/20/90 Remote fill #2 3 <1 NA <1 <1 <1 <1 NA NA <5 <br /> 043 12/20/90 Remote fill #3 3 <1 NA <1 <1 <1 <1 NA NA <5 <br /> 044 12/20/90 Remote fill #4 2.8 <1 NA <1 2 <1 <1 NA NA <5 <br /> 045 12/20/90 Remote fill #5 3 5000 NA <500 <500 950 1400 NA NA 5 <br /> 046 12/20/90 Remote fill #6 3 3.0 NA <1 <1 <1 <1 NA NA <5 <br /> 047 12/20/90 Remote fill #7 3 <1 NA <1 <1 <1 <1 NA NA <5 <br /> 048 12/20/90 Remote fill #8 3.5 <1 NA <1 1 <1 2 NA NA <5 <br /> 1:6 NA.— < �� ��<1;—�, ,� .�<1_.:_�� •�<1�r ��NAT--,- -.. < . <br /> 050 12/20/90 Remote fill #10 3.5 <1 NA <1 <1 <l <1 NA NA <5 <br /> 051 12/21/90 Center of Tank #1 16 <1 NA <1--,` c1 ` ' <1 _ <1`-- 'NA r - NV-m <br /> I <br /> i 034 12/20/90 Tank #2 7.5 15 290 75 2500 1900 20000 4.1 <0.5 2500 <br /> a. Refer to Figures 1, 2, and 3 for approximate locations of tanks and sample locations. Tank Nos. 1 and 2 are 10,000-gallon diesel and 500-gallon <br /> gasoline tanks, respectively. <br /> b. Depth below existing ground surface at time of sampling. <br /> c. 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 identified as diesel <br /> TPH-G - Total Petroleum Hydrocarbons as gasoline <br /> NA = Not Analyzed <br /> "<" = Laboratory Limit of Detection <br /> J <br />