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GROUND ZERO ANALYSIS, INC. <br /> 1714 Main Street <br /> Escalon, California 95320-1927 <br /> Telephone: (209)838-9888 <br /> Facsimile: (209) 838-9883 <br /> August 23, 2002 <br /> Mr. Harlin Knoll <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, CA 95202 <br /> Subject: Workplan for Installing and Sampling Replacement Monitoring Well <br /> 1140 W. Hammer Lane, Stockton, California (Figure 1) <br /> Dear Mr. Knoll: <br /> This Workplan is submitted on behalf of the Harold and Dena Knowles Family Trust in response <br /> to a San Joaquin County Environmental Health Department (EHD) directive dated November 7, <br /> 2001. This Workplan describes the proposed methodology to install and sample a replacement <br /> for well MW8, which was destroyed under permit from EHD. <br /> The general scope of work will consist of drilling and sampling one soil boring east of well MW5 <br /> to replace well MW8. Upon completion of the well and receipt of soil and groundwater <br /> analytical results, a technical report summarizing the methods and results will be prepared and <br /> submitted to EHD. <br /> SCOPE OF WORK <br /> Drilling, Well Construction and Soil Sampling <br /> One monitoring well will be installed near the southeast corner of the intersection of Hammer <br /> Lane and Thornton Road. A site plan showing potential locations of the replacement well is <br /> presented on Figure 2. The actual location would be determined after a field inspection to <br /> evaluate the locations of existing utilities. This installation assumes that the current property <br /> owner would authorize Ground Zero to enter the property and install the required well. <br /> A drilling contractor with a C-57 license will advance the boring using a drilling rig equipped <br /> with hollow stem augers. Based upon recent water level measurements at the site between <br /> approximately 31 feet below ground surface (bgs) and 36 feet bgs, the well will be completed to a <br /> G:\Data\GROUNDZE\KNOWLES.HAM\REPORTS\WKPLAN-MW8R.doe <br />