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submersible pump was then lowered into the well As each well was pumped, the discharge rate <br /> was measured at the beginning of the purge and the necessary purge time was calculated A <br />' minimum of three casing volumes was removed from each well prior to sampling Monitoring <br /> well purge data is summarized in Table A-2 <br />' TABLE A-2 <br /> Monitoring Well Purge Data <br /> April 15 and 16, 1993 <br /> Well/Sample Total Depth Depth to Water 3 Purge Flow Rate Purge Time Purge Volume <br />' (feet)' (feet, BGS) Volumes (gal) (gpm) (min) (gal) <br /> MW-4 6452 5050 275 4 7 28 ' <br /> MW-5 6266 4863 275 4 7 28 <br />' MW-6 5900 4974 18 4 5 20 <br /> MW-7 6508 5150 265 4 7 28 <br />' MW-8 6525 51 87 26 4 7 28 <br /> 1 Measured from top of PVC casing(TOC) <br />' At the beginning, during and end of the purge process, measurements were taken for pH, <br /> electrical conductivity and temperature of the purge water This information was also recorded <br /> on field water sampling data sheets and final values are presented in Table A-3 Upon <br /> completion of the purge, the pump assembly was removed from the well to allow sampling with <br /> a bailer <br />' TABLE A-3 <br /> Field Water Quality Measurements <br /> End of Purge Values <br /> April 15 and 16, 1993 <br />' Well/Sample pH Temperature (°F) Conductivity (umhos) <br /> MW-4 8 08 669 1341 <br /> MW-5 742 700 876 <br />' MW-6 7 10 679 1738 <br /> MW-7 761 653 1719 <br /> MW-8 754 71 2 1418 <br /> Sampling Procedure and Analysts__Schedule <br /> Five monitoring wells were sampled The sampling order was as follows <br />' I iM\RPiSVUC IST WP A - 2 OVES/93 <br />