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d <br /> 10. November 1992 <br /> (GaeoAudit CV 30-34E3-1. 47) <br /> page 2 of 3 <br /> t <br /> relative water .:elevation for the monitoring welds was then <br /> calculated by subtracting the depth from the casing'� levation. <br /> 'FABLE 1 -- GROUNDWATER DATA ; <br /> 23 October 1992* <br /> Relative Relative <br /> Casing Depth- to Groundwater . a, <br /> _ WaterFlavation <br /> Well No. Elevation <br /> 98 .16 61.. 12 37 . 04 <br /> MW-1 .�.._ <br /> MW_3 97 . 93 DRY 36.99 <br /> MW-4 98 . 30 61. 31 <br /> MW-'5 <br /> 96.78 60. 40 ', -36.3$ <br /> r <br /> * All mesurments in feet <br /> These results indicate that water levels have fallen' in all wells <br /> since June 1992• The greatest drop occurred in MW;S (0.82 ft) .. <br /> However, the relative elevations have remained unchanged, and the <br /> level is still higher in MW-1 than in MW-4 or MW-5. this supports <br /> the West or northwest groundwater gradient reported in GeoAuditIs <br /> June: 1992 Groundwater Assessment Report, <br /> if <br /> TPH Ias gasoline was detected' in all three, samples, and <br /> concentrations have risen in MW-'4 and MW-5 since the June 1992 <br /> sampling event (Table 2) . Benzene and ethylbenzene were detected in <br /> both- MW- <br /> 1- and MW-4 , -and toluene and xylenes were .detected in all <br /> iusldetecttd <br /> three samples. Neither toluene nor' xyleneof re pre y�areyatt attached. <br /> . ° <br /> in MW-5 . The laboratory report and chain <br /> TABLE 2 -- LABORATORY RESULTS ~ <br /> 23 October 1.992* <br /> We No. 'TPH-g <br /> Benzene T uene � ane <br /> 70 11 8 .9 1.4 6. 5 <br /> MW-1 OOC!?8 . 0016 <br /> MW_4 . 4 • 027 .006 . . 0026 <br /> MW-5 .018 ND .0025 ND <br /> *All values in milligrams per liter (Parts per, million) <br />