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GEOSYNCEC CONSULTANTS <br /> ' Ms. Amy Terrell <br /> 5 October 2004 <br /> Page 3 <br /> If a well is not acceptable to the adjacent property owner, then propose <br /> ' using direct push methods to collect grab groundwater samples. <br /> We did not recommend an additional well in the operations area of the site to <br /> ' identify constituents identified in the 1999 and 2000 grab groundwater investigations. <br /> As stated in the RWQCB's 9 July 2003 letter, the existing monitoring well network <br /> identifies constituents that could be migrating offsite. The results from the 1999 and <br /> ' 2000 grab groundwater samples are sufficient to identify the constituents of concern <br /> onsite. If a well is needed in the future to monitor the effectiveness of any remediation <br /> efforts, then a suitable well location would be identified at that time. Such a well would <br /> be sited to maximize the intended data collection goals. <br /> In their 23 August 2004 letter, the RWQCB agreed with the proposed work, and <br /> also requested installation of an additional monitoring well downgradient of MW-5 to <br /> delineate the nitrate plume. In addition, the following deadlines were set by the <br /> RWQCB: <br /> Submit a work plan for the installation of upgradient downgradient monitoring <br /> wells by 1 October 2004; and <br /> Submit a source area investigation work plan by 31 December 2004. <br /> This document satisfies the first requirement for a well installation work plan, and <br /> ' includes other work elements discussed above. <br /> ' WORK PLAN <br /> Locations for Monitoring Wells and Groundwater Sampling <br /> ' The proposed location for new downgradient well MW-6 is shown on Figures 2 <br /> and 3. The uppermost groundwater beneath the site is expected to be encountered at <br /> ' about 20 to 25 feet below ground surface (bgs) and the new well will be constructed to <br /> monitor the first-encountered groundwater beneath the site. <br /> • P:\PRJ2003REM\Wilbur-Ellis\WtO250(JTF)\STOCKTON\S 11 Oct 2004 Work Plan\Oct 04 Work Planb.doc <br /> ' w <br /> `, RECYCLED AND BECVCLABLE <br />