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Advanced _ <br /> GeoEnvironmental, Inc . <br /> 15 August 2006 RECO ll E D <br /> AGE-NC Project No. 01-0887 AUG 1 7 2006 <br /> ENVIRONMENT HEALTH <br /> Mr. Nuel Henderson, Jr. PERMIT/SERVICES <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, 3`1 Floor <br /> Stockton, California 95202 <br /> Subject: Additional Monitoring Well Installation Work Plan Addendum <br /> SARALE FARMS <br /> 16500 Clifton Court Road, Stockton, California <br /> Dear Mr. Henderson: <br /> Advanced GeoEnvironmental, Inc. (AGE) has prepared the enclosed work plan addendum for the <br /> above-referenced address. The scope of work detailed in the AGE-prepared Additional Monitoring <br /> Well Installation Work Plan, subsequently modified in the San Joaquin County Environmental <br /> Health Department (EHD) letter dated 14 April 2006 (Appendix A), included the installation, <br /> development, and survey of four additional on-site ground water monitoring wells screened from <br /> 20 feet to 25 feet below surface grade(bsg)and one on-site ground water monitoring well screened <br /> from 50 feet to 55 feet bsg. The work is being performed for further delineation of the vertical and <br /> lateral extents of petroleum hydrocarbon-impacted soil and ground water in the area of the former <br /> underground storage tank(UST),fuel dispenser,and associated piping.AGE would like to make the <br /> following addition to the proposed scope of work: <br /> • Installation, development, and survey of one additional ground water monitoring well, <br /> screened from 5 feet to 20 feet bsg, approximately 65 feet north of monitoring well MW-1 <br /> on the south side of West Clifton Court Road. Soil samples will be collected every 5 feet, <br /> beginning at 5 feet bsg, and prepared and analyzed in accordance with procedures outlined <br /> in the Additional Monitoring Well Installation Work Plan. <br /> AGE believes that the proposed well is necessary to define and monitor the dissolved hydrocarbon <br /> plume's northern boundary. The location of the site is illustrated on Figure 1. A plan of the site, <br /> including soil borings and existing and proposed monitoring well locations,is illustrated on Figure 2. <br /> 337 Shaw load. Stockton. California 95215 <br /> Telephone(209)467-1006 Fax(209)467-1118 <br />