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;.IuSy X17, 1991 <br /> l,, . . r <br /> Quit: Step :Market No. 121) � i't+= !m Page z <br /> Project. No. 3-491211-31 <br /> analysis' <br /> boring~:collecting soil samples -it 5-root todepthotriterywe'll(jancl��c�tollccti b 111groundwater <br /> Converting the borings to ground <br /> samples for laboratory analysis'aDuring course <br /> h ydrocarbonsthis ihadtaffe affected soil found <br /> that product lines were leaking petroleum <br /> il <br /> groundwater beneath the situ �Xc avationcbacikfill dlies ewithre cclaea n(fill�rThese tactily ties <br /> exc.tvated and removed, ane <br /> and findings were detailed in our 5oi1 and Ground tsmonitoringiuprol;r�t» <br /> October 9, 1990, In December 1910, a quarterly groundwater <br /> wars initiated. <br /> in groundwater <br /> a clsnLd bons iaIn April 1991, due to regunaryd iyis, aadtionalsampingnd analysis was <br /> during the December sampling <br /> to c+.�nfinn the non-detectable results of the March <br /> performed. The purpose of ilii' was <br /> 1991 sampling and analysis. <br /> Field Operations <br /> Exceitech measured the depth to groundwater and checked for the presence of floating <br /> product at each well ofusing an <br /> the wells.optical <br /> groundwater n eacNo h well was floatingeasurable productp or the <br /> i was detected in any <br /> presence of surface sheen with roclear <br /> le ch Well lic following the proailer: none was cedures outlined cin our <br /> samples were then colletwater <br /> cndix A). Approximately four wel!-casing <br /> groundwater sampling protocol (App' <br /> volumes of groundwater were removed from each well before sampling. Groundwater <br /> removed from the wells and equipment'trinse <br /> on si eapen ng thplaced <br /> laboratory aanalyticent ofI <br /> Transport ation-approved drums <br /> results. <br /> i Groundwater Elevations <br /> from <br /> Depth to groundwater measure u�ace and are includerits were obtained prior <br /> with the wll sampling e ation sinlTable <br /> 44.40 to 45.35 feet below dnts ranged from 33.12 <br /> 1. Groundwater elevations <br /> calculated <br /> from <br /> ba ed on available survey data. A groundwater <br /> 33 .33 feet� level <br /> mean sea {MSL) Figure 3. <br /> elevation contour map generated from these elevations <br /> ined is included <br /> as <br /> surface with he <br /> groundwater contour maps gently approximately 0.0029. <br /> predominantly easterly flow at a gradient of app Y <br /> Laboratory Analyses <br /> The groundwater samples were transported to Anametrix, Inc. (a state-certified <br /> BTEX <br /> laboratory) located in Sari Jose, California and analyzed for TPHD, TP11G, and BTEX <br /> components. A summary of the analytical <br /> lytianalytical reports lts from uare attached in Append plrB. <br /> and st well s <br /> is presented in Table 1. The r?' <br />