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15 October 2000
<br />' AGE-NC Project No 96-0232
<br /> N Page 8 of 15
<br />' A plot of draw-down versus time for the fourth stage pamp test with data logs are Included in
<br /> Appendix H
<br /> Draw-down versus distance for wells MW-1, EW-2 and EW-3 were graphed on semi-logarnthmic r
<br /> paper, utilizing the Time-Drawdown Method (Jacob straight-line method), the transmissivity and
<br /> storativity was determined (Appendix H) Ground water levels in wells MW-6B (located 73 feet
<br /> t1 towards the west)and MW-9A(Iocated 45 feet towards the west) appeared to be Influenced during
<br /> the pump test by the ground water extraction
<br /> During the fourth stage pump test,the greatest ground water drawn-down was observed in extraction
<br /> �
<br /> well EW-3 at 8 88 feet after 400 minutes of pumping operation, draw-down was observed in wells
<br /> EW-1 (located 11 feet towards the north) at 0 40 feet, MW-1 (located 12 feet towards the east) at
<br /> 0 40 feet and EW-2 (located 4 feet towards the east) at 0 40 feet Smaller decreases in ground water
<br /> levels were observed in wells MW-9A(located 41 feet towards the west and screened 40 to 50 feet
<br />' bsg) at 0 31 feet and MW-6B (located 70 feet towards the south and screened 43 to 48 feet bsg) at
<br /> 0 28 feet Utilizing data collected from wells EW-1, EW-2, MW-i, MW-6B, and MW-8A, a
<br /> transmissivity value was calculated at 1,375 gal/day-ft, a specific yield value was calculated at 0 11
<br />' • and a radius of influence was projected at 33 feet utilizing a semi-logarithmic plot of draw-down
<br /> versus distance (Appendix H)
<br />' 4 3 PURGED GROUND WATER DISPOSAL
<br /> r
<br /> Approximately 9,500 gallons of purged water were generated during operation of the aquifer draw-
<br /> 'down pump test On 21 July 2000, the pump test purged water was pumped from the aboveground
<br />' storage Baker tank and into a vacuum truck (supplied by ABC 0,Environmental), the pump test
<br /> purged water was transported off-site under non-hazardous waste manifest to Invirotech, a waste
<br /> treatment faclllty'located in Roseville, California. Documentation and uniform hazardous waste
<br />' manifest for disposal of the pump test purged water Is contained in Appendix A
<br />' 5.0. QUARTERLY GROUND WATER MONITORING AND SAMPLING EVENT
<br /> On 29 acid 30 Aukust 2000, ground water monitoring and`sampling was performed at 30ground
<br />' water monitorigwells (MW-1,MW-2,'M -4,MW-5,MW-6A,,MW-6B, MW-7, MW-8A, MW-
<br /> 9 T
<br /> 8B, MW-8C, MW-9A, MW-9B, MW-9C, MW-10A, M-W-10B, MW-10C, MW-10D, MW-10E,
<br /> MWA 1A, MW-11B, MW-11C, MW-11D, MW-12A, MW-12B, MW-12C, MW12D, MW-13A,
<br /> MW-13B, MW-13C and MW-13D), ground water samples were also collected from two domestic
<br /> d7nk ing water wells located at 14659 Thornton Road (Rocky's Restaurant) and at 14749 Thornton
<br /> Road(Three B's Truck Plaza), ground water samples were also collected from two municipal ground
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<br /> Advanced GeaEuvironmeotal,Inc-
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