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WATERWOFW <br /> GEOCNCMICAL•GECTECNNICAL ENVIROINPOENTAL <br /> FILE <br /> October 10, 1990 <br /> Ms. Darlene :Reuss � <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 2009 H _ <br /> Stockton, CA 95201 <br /> Re: 2-inch recovery well, Tri-Valley Growers Plant T, 26200 <br /> Nowell .Read, Thornton, CA <br /> Dear Darlene: <br /> As per your request, 1. am writing to explain our rational for <br /> using a two-inch well for extraction instead of a four-inc'h well. <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 lour 'pumping rate cannot exert control on the plume <br /> additional pumps maybe installed in existingwells or addi--onal <br /> :.ells installed to control water flow. <br /> If you have any questions or need more information, please <br /> contact me at your convenience. <br /> Respectfully, <br /> WaterWork <br /> X <br /> Bill Channel <br /> Senior Geologist <br /> HC/tp <br /> pc: Mr. Juan Quijano, <br /> 1710 N AIN STREET • ESCALON,CA 0.5,320 ; <br />