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0 s <br /> °- Engineers <br /> Planners <br /> ® <br /> Economists <br /> i✓ '�L:r '`i �U <br /> Scientists <br /> SEP 2 2 1994 <br /> September 21, 1994 <br /> ENVIRONMENTAL HEALTH <br /> SWE31614,P3.CC PERMIT/SERVICES <br /> Linda Turkatte <br /> San Joaquin County Environmental Health Department <br /> P.O. Box 388 <br /> Stockton, CA 95201-0388 <br /> Dear Linda: <br /> Subject: Well Permits for 535 S. Center St., Stockton, CA <br /> Enclosed are two well permit applications, a check for the amount of $178.00 for <br /> permitting installation of on-site and off-site monitoring wells, the City of Stockton <br /> egress permit, a copy of our workplan with final modifications, and a figure depicting <br /> all existing and proposed well sites on or near the PG&E Former Manufactured Gas <br /> Plant (MPG) Site located at 535 Center Street in Stockton, California. Also attached is <br /> a copy of the sewer plans for the area. <br /> Six to seven new wells (MW-14, MW-15, MW-16, MW-17, MW-18, possibly MW-19, <br /> and MW-20) are scheduled to be installed between October 4 and November 4, 1994. <br /> The proposed well locations are shown on the attached figure in parenthesis. These <br /> well locations have been changed from those in the workplan due to difficulties gaining <br /> site access. Wells MW-15 and MW-17 are scheduled to be installed on PG&E <br /> property, but their final locations may be offsite if Hydropunch® groundwater samples <br /> collected from the onsite locations contain MGP residues. Similarly, MW-19 will be <br /> installed if the Hydropunch® groundwater samples collected from Zone A during <br /> installation of MW-14 contain MGP residues. Wells MW-14, MW-16, and possibly <br /> wells MW-15, MW-17, and MW-19 will be installed on the City of Stockton right-of-way <br /> on Commerce and Church Streets (see attached figure). <br /> The proposed monitoring wells will be installed to the following depths: <br /> • MW-14, MW-15, and MW-16: 225 feet below ground surface, with the <br /> screened interval from 210 to 220 feet below ground surface and the <br /> grout seal at 190 feet below ground surface. <br /> CH2M HILL 1111 Broadway,P.O.Box 12681,Oakland,CA 94604-2681 510251-2426 Fax 510893-8205 <br />