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I <br /> RAMAGE <br /> ENVIRONMENTAL Sacramento Office <br /> RUG 14PM 1 <br /> * ' Post Office Box 869 <br /> " `' Rancho Murieta, CA 95683 <br /> Tel (91:6) 354-3250 <br /> Fax (916) 354-1786 <br /> August 13,2001 <br /> I <br /> j <br /> a <br /> Mr. Harlin Knoll,Sr. R.E.H.S. <br /> San Joaquin County PH /EHD <br /> 304 East Weber Avenue,3rd Floor <br /> Stockton,CA 95201-0388 <br /> Re:,,Lett;r Wor l -Plan—Monitoring ng We :InstalUtlon and-Groundwater Sampling, <br /> Jahant Food and Fuel UST Site, 24323 N. Highway 99,Acampo, California <br /> UST Cleanup Fund Claim.#131 I'5'' <br /> Dear Mr. Knoll: <br /> It was a pleasure to speak with you last week regarding your directive to install one <br /> additional groundwater-monitoring well.and continue'quarterly groundwater monitoring 1 <br /> at the above-referenced site. The additional well is required to define the downgradient <br /> extent of impacted groundwater beneath the site. This'letter work plan outlines the <br /> methods Fand procedures for implementing these proposed tasks. <br /> r .5 <br /> SCOPE Of WORK <br /> Monitoriniz Well Installation, Development and Elevation Survey <br /> To evaluate and monitor the extent of any impacted groundwater downgradent of the <br /> former underground storage tank(UST)system,one groundwater monitoring well will be <br /> permitted and installed approximately 60 feet north-northeast of-the;former USTs(Site <br /> Plan attached). <br /> The well will be installed in an,8=inch diameter soil boring drilled by a licensed drilling <br /> contractor using a truck-mounted hollow-stem auger drill rig. The well will consist of <br /> approximately 20 feet of two-inch diameter, Schedule 40,flush-threaded and machine- <br /> slotted(0.020-inch)polyvinyl chloride(PVC)well screen. To correspond with the <br /> construction of the three existing monitoring wells,the proposed well will be drilled to a <br /> total depth of approximately 87 feet below ground surface(bgs), and be constructed with <br /> a screen interval-spanning from approximately 67 to 87 feet bgs; Blank PVC casing will <br /> thread into the top of the well screen and extend to:the surface. <br /> w <br />