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ca <br /> 2021899-7004 <br /> Lammersville School District 11 <br /> July 16, 1990 <br /> TABLE 4 <br /> GROUNDWATER MONITORING DATA <br /> (in feet) <br /> DEPTH TO WATER TABLE <br /> WELL WATER ELEVATION <br /> DATE ID ELEVATIAN <br /> 7.69 92.31 <br /> 6121/90 MWA 100.00 92.33 <br /> 95.'34 7.81 <br /> < MW-2 7.27 92.87 <br /> MW-3 100.14 7.78 93.04 <br /> ` MW-4 100.82 6.73 91.33 <br /> MW-5 98.06 7.16 91.91 <br /> MW.6 99.07 7.34 92.38 <br /> - MW-799.72 92.32 <br /> MW-8 99.75 7.43 <br /> * Survey elevation from center of street box(to grade). g arbitrary datum <br /> - Survey marker is MW-1 located adjacent to former underground gasoline tank; <br /> of 100 feet used at this point. <br /> 5.7 GROUNDWATER SAMPLING <br /> Following groundwater monitoring,approximately 20 to 30 gallons of water was longed from each <br /> lons of water <br /> of wells MW-3 through MW-8. MWA and MW-2 were purged dry after removing was ofour <br /> wedrolrecharge at least <br /> gallon of water, respectively. The groundwater in these sampled. The groundwater samples were <br /> 80 percent of the measured static water level before being <br /> collected with an EPR approved Teflon sampler and placed in 4o-milliliter (ml) glass vials, and 1 liter <br /> glass vials until a pH <br /> amber glass bottles. Fifty percent hydrochloric acid(HCL)was added to the 40-m1 <br /> of less than 2 was achieved. The 40-MI glass vials were capped with'reflonR-lined caps so that no air was <br /> trapped inside. Te1'svered with the appropriate Chain-of- <br /> he <br /> hain ofhe samples were labEled,preserved on ice,and d <br /> _custody-manifest.to STEL for subsequent analysis. Groundwater samples obtained from all eight wells <br /> - - - -- --- ------ - --- <br /> r, <br /> modified EPA Met <br /> were analyzed for TPH Q using hod 8Qi5,ar3d TPH G and BTi=X using EPA Methods— - _.---- <br /> GROUNDIVATER <br /> 5030/8015/8020. r��� <br /> �'TECHNOLOGY,INC. <br />