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TABLE 1 Page 10 of 10 <br /> GROUNDWATER DATA <br /> FORMER SHELL CENTRAL VALLEY CRUDE OIL PIPELINES <br /> CORDES RANCH <br /> TRACY,CALIFORNIA <br /> cn=Below detection limit <br /> -=Not analyzed <br /> NM=Not able to measure SPH <br /> TPHc=Total petroleum hydrocarbons as crude oil by EPA Method 8O15B(M)(C6-C44) <br /> TPHd=Total petroleum hydrocarbons as diesel by EPA Method 80158(C10-C28) <br /> Benzene,toluene,ethylbenzene,xylenes by EPA Method 826OB. <br /> TDS=Total dissolved solids by Standard Methods 2540 C <br /> TOC=Top of casing elevation(Elev)in feet(ft)relative to mean sea level(MSL) <br /> ft bgs=feet below ground surface <br /> GW=Groundwater <br /> Depth to water measured at TOC <br /> a=Hydrocarbon result partly due to individual peaks)in quantitation range. <br /> b=EPA 80158 w/Silica Gel Clean-up <br /> c=Depth to water measurements taken prior ro well development. Measurement is inaccurate due to excessive sediment in well. Well redeveloped and sediment removed in September 2011. <br /> d=Due to laboratory error,silica gel clean-up not performed. <br /> e=RPD of the LCS and UCSD exceeds the control limits <br /> f=Split Sample 9/18-19/2012 by Calscience <br /> g=Split sample 9/18-19/2012 by Test America <br /> 1=Estimated concentration due to surrogate recovery being below acceptable control limits. <br /> k=The chromatographic pattern was inconsistent with the profile of the reference fuel standard. <br /> The formula:TOC+(sph thickness(O.8))-DTW was used for groundwater elevation <br /> Zone A=Well screen interval 30 to 50 ft bgs. <br /> Zone B=Well screen interval 105 to 125 ft bgs. <br /> Zone C=Well screen interval 160 to 177 It bgs. <br /> CM00223 D7l <br />