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TA LE 1 <br /> LABORATORY ANALYSIS RESULTS: TANK EXCAVATION AND PIPE TRENCH SAMPLING <br /> STAGG HIGH SCHOOL (DECEMBER 1990) <br /> HL100814 <br /> Sample Date Locationa Depthb TEPH TPH-G Benzene Toluene Ethylbenzene Xylenes EDB Lead OVAc <br /> Collected (ft) (mg/Kg) (mg/Kg) (ug/Kg) (ug/Kg) (ug/Kg) (ug/Kg) (ug/Kg) (mg1L) Reading <br /> (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 13 <1 NA <1 <1 <i <1 NA NA <5 <br /> #1 <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 SW Comer 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 /> i 044 12120/90 Remote fill#4 2.8 <1 NA <1 2 <1 <1 NA NA <5 <br /> c 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 12120/90 Remote fill#8 3.5 <1 NA <1 1 <1 2 NA NA <5 <br /> 049 12/20/90 Remote fill#9 3.5 1.6 NA <1 <1 <1 <1 NA NA <5 <br /> 050 12/20/90 Remote fill#10 3.5 <1 NA <1 <1 <1 <1 NA NA <5 <br /> 051 12/21/90 Center of Tank#1 16 <1 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 <br /> i 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 <br /> 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 />