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CV-vATC <br /> City supply well WP-1. A hydraulic barrier could be installed along the southern portion of East Worth <br /> Street and the western portion of Emerald Street at the intersection of these two streets (Figure 2).Four <br /> injection wells installed within the shallow aquifer could be connected via a two-inch header to a water <br /> supply.A flow rate of approximately ten gallons per minute is anticipated for each injection well. <br /> Preliminary field work will be required prior to installing the components of the remedial system. <br /> Pump testing and modeling will be required to properly design the extraction well and hydraulic <br /> barrier.An infiltration test at the modified sumps will be required to design the extraction flow rate. <br /> Schedule <br /> Following formal authorization from the California Regional Water Quality Control Board and <br /> Diamond Walnut Growers to proceed, ATC can begin work within two weeks. ATC anticipates it will <br /> take approximately two months to complete the preliminary field work and pilot testing required to <br /> design the components of the remedial system. Following data reduction and analyses, a remedial <br /> design can be prepared approximately four weeks after completion of the preliminary field work. <br /> Additionally, ATC will prepare and submit a workplan to properly destroy the inactive facility well at <br /> the site within approximately four weeks. <br /> If you have any questions, please contact our office at(209) 579-2221. <br /> Respectfully Submitted, <br /> ATC Associates Inc. <br /> � �7 . <br /> Todd C. Hafiter <br /> Project Geologist <br /> H` ' r'• > . <br /> J e Homsey,P.E. <br /> CA Registered Civil Engineer No. C 47410 `P�,If. rL <br /> sfof ego's <br /> Attachments <br /> PC: Mr.Mike Lescisin,Diamond Walnut Growers <br /> Ms.Margaret Lagorio, San Joaquin County EHD <br /> WA62583\icners\Concept Design Outline.doc 4 <br />