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TABLE 1: LABORATORY ANALYSIS RESULTS FROM TANK EXCAVATION <br /> AND PIPE TRENCH SOIL SAMPLING AT STAGG HIGH SCHOOL <br /> STOCKTON UNIFIED SCHOOL DISTRICT <br /> HL100814 <br /> Sample Date Location` Depth' TEPH TP"-G Benzene Toluene Ethylbenzene Xylenes Ethylene Lead OVA` <br /> Collected (ft) (mg/Kg) (mg/Kg) (ug/Kg) (ug/Kg) (ug/Kg) (ug/Kg) Dibromide (mg/L) Reading <br /> (ug/Kg) (Ppm) <br /> 035 12/20/90 NE Corner of Tank#1 13 <1 NA <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 . <l NA <1 <1 <1 <I NA NA <5 <br /> 038 .12/20190 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 <I <1 <1 <1 NA ' NA <5 1 <br /> 040 12/20/90 SW Corner of Tank#1 13 <I NA <1 <1 <1 <1 NA NA. <5 <br /> 041 12/20/90 Remote fill#1 3 <1 NA <1 <I <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 43 3 <] NA <1 <1 <1 <1 NA NA <5 <br /> 044 12/20/90 Remote till 44 2.8 <1 NA <I 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 /> 049---'12120/90 '� - Remote fill 0 3.5 NA <5 <br /> q <br /> 050 12/20/90 Remote fill#10 3.5 <1 NA <1 <1 <1 <1 <br /> NA < <br /> _ ..�.w:,.. . <br /> m 051 12/21/90 Center of Tank#1 16 <I NA <1 <1 <1 <1 NA NA <5 <br /> 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 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 are expressed in <br /> 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 />