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ENVIRONMENTAL HEALTH DEPARTMENT <br /> Pr1 U l �\r <br /> SAN JOAQUIN COUNTY <br /> e r 2 Donna K. Heran, R.E.H:S. Unit supervisors <br /> " s Director 304 East Weber Avenue, Third Floor Carl Borgman R.E.H S. <br /> Al Olsen, R.E.H.S, Stockton , California 95202-2708 Mike Huggins R E.H.S., R.D.I. <br /> d . <br /> Douglas W. Wilson, R.E.H. S ,Manager <br /> 4 �lko R`' Laurie A. Cotulla, R.E.H.S. TelephOrie: (209) 468-3420 Margaret Lagorio, R.E.H.S. <br /> Progran Manager Fax : (209) 464-0138 Robert McClellon, R.E.H.S. <br /> Mark Barcellos, R.E.H.S. <br /> NASHEEM KHAN <br /> 5925 TERMINAL <br /> APT . 1 <br /> RIVERBANK CA 95367 <br /> AVTAR SOHAL <br /> 819 NEW HALL CT <br /> STOCKTON CA 95210 <br /> RE: QUICK & SAVE <br /> 1901 SOUTH ELDORADO <br /> STOCKTON CA 95206 <br /> WORKPLAN:Intenm Remediation Feasibi& Testing and Well Installation Work Plan Addendum (Groundwater <br /> Extractiau Pitot Test) _DATED: June 15. 2005 _ <br /> PREPARED BY: Advanced GeoEnviroa ments Inc (AGE) - <br /> APPROVED ;K (with conditions. See below) <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORKPLAN (H&S 25296.10,subd. (c) (3).): <br /> 1 . Install one 4-inch diameter Schedule 40 PVC groundwater extraction well (EW-1) with 0.030-inch <br /> slotted screen length set from approximately 35 feet below surface grade (bsg) to 55 feet bag. <br /> 2. Conduct an 8-hour groundwater pumping test with the pumping rate increasing every 2-hours starting <br /> at 2 gallons per minute (GPI\ , to evaluate the optimal extraction rate for the constant rate <br /> groundwater extraction test. Levelloggers with be placed in EW-1 and monitoring wells MWl, MW2, <br /> and MW3 to observe the influence of the pumping test. <br /> 3. Conduct a 24-hour constant rate groundwater extraction test based on the result of the 8-hour <br /> pumping test to evaluate the feasibility of groundwater extraction for interim remediation. <br /> 4. Contingency to increase the 24-hour constant rate extraction test up to 72 hours if a steady state <br /> condition has not been achieved after 24 hours. <br /> 5. Store (in a Baker tank), characterize, and transport extracted groundwater to licensed facility for <br /> disposal <br /> 6. Collect soil and/or groundwater samples for analyses during well installation and the extraction tests. <br /> COMMENTS AND CONDITIONS: <br /> 1 . Install the EW-1 by July 31 , 2005. <br /> 2. Implement the groundwater extraction pilot test by August 15, 2005. <br /> REASONS FOR DISAPPROVAL OF THE WORKPLAN (H&S 25296.10 subd.(C) (3).): <br /> None. <br /> DATEDJune 22 2005 BY C` �- <br /> Cc: CRWQCB, Central Valley Region — James L.L. Barton, PG <br /> Cc: Advanced GeoEnvironmental, Inc. — Donna Sexton <br />