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WATERWORK <br /> .GEOCHEMICAL•GEOTECHNICAL• ENVIRONMENTAL <br /> . 0 CrT �1��2- 1990 <br /> ENVIR4NM"NfiAL HEALTH <br /> PERMTS VICES <br /> October 10, 1990 " <br /> Ms. Darlene Reuss <br /> San Joaquin County Public Health Services <br /> Environmental--Health Division <br /> P.O. Box 2009 I <br /> Stockton; CA95201 <br /> Re: 2-inch recovery well, Tri-Valley Growers Plant T, 26200 <br /> Nowell Road, Thornton, CA <br /> Dear Darlene: <br /> As - per your request, I am writing to explain our. rational fore ` <br /> using a two-inch well for extraction instead of a four-inch wel]:+:_'= <br /> -Two-inch wells are ideal for pumping in low flow water conditions <br /> ( <2 gpm) like in Thornton. <br /> -We will -evaluate the pumping efficiency of the well by performing <br /> a ,start--up pump test' and monitoring the groundwater gradient over <br /> time. If the low pumping rate cannot exert control on the plume <br /> additional pumps maybe installed in existing wells or additional <br /> wells installed to control water flow. <br /> If you have .any questions or need more information, please <br /> contact me at your convenience. <br /> Respectfully, x. <br /> t <br /> WaterWork <br /> Bill. Channel . <br /> Senior 'Geologist <br /> BC/tp <br /> PC: Mr. Juan Quijano <br /> 1710 MAIN STREET • ESCALON,CA 95320 • (209) 838-3507 <br /> FRESNO,CA(209) 222-3495 • RENO, NV(702) 788-6830 <br />