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November 26, 2019 Reference No. 11205950 <br /> Mr. Michael Kith <br /> San Joaquin County <br /> Environmental Health Department(SJCEHD) <br /> 1868 E. Hazelton Avenue <br /> Stockton, CA 95205 <br /> Mr. Brendan Kenny <br /> Engineering Geologist <br /> Regional Water Quality Control Board <br /> 11020 Sun Center Drive, Suite 200 <br /> Rancho Cordova, California 95670 <br /> Re: Work Plan for Well Repair or Replacement of MW-3 <br /> CEMEX Kerlinger Aggregate Plant <br /> Unclassified Landfill <br /> 30131 South MacArthur Boulevard <br /> Tracy,CA <br /> Dear Mr. Kith and Mr. Kenny: <br /> GHD is submitting this Work Plan for Well Repair or Replacement of MW-3(Work Plan)for the site <br /> referenced above(Figure 1)on behalf of CEMEX Construction Materials Pacific, LLC(CEMEX). <br /> Groundwater monitoring well MW-3 was recently struck by site equipment and requires repair. CEMEX <br /> notified the RWQCB of the damage on November 4, 2019 and the RWQCB requested that a work plan be <br /> submitted to repair the well (Attachment A). The extent of well repair is unknown at this time and <br /> assessing the damage to the well is part of the scope of work included in this Work Plan. Well MW-3 is <br /> part of a monitoring well network currently monitored and sampled on a semi-annual basis to assess <br /> groundwater conditions at the site. The purpose of the proposed work is to provide a usable monitoring <br /> point at the location of MW-3 through well repair or well replacement, if necessary. <br /> 1. Site Description and Background <br /> The site is an operating aggregate plant located in Tracy, California, and contains an unclassified landfill <br /> regulated by WDR R5-2010-0085. The site is situated between South Tracy Boulevard to the west and <br /> South MacArthur Drive to the east,with Tracy Municipal Airport located northwest of the site. <br /> The site is located in the Central Valley,which is a structural depression (approximately 400 miles long <br /> and 20 to 70 miles wide)extending from near Redding in the north to the Tehachapi Mountains in the <br /> south. Water-producing deposits in the valley consist primarily of unconsolidated continental deposits <br /> (alluvium)of Pliocene age that extend to depths of up to 3,500 feet below grade(USGS, 1998a). Local <br /> GHD <br /> 4080 Plaza Goldorado Circle,Suite B,Cameron Park,California 95682 USA <br /> T 530 677 5515 W www.ghd.com <br />