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s <br /> k <br /> MONITORING WELL INSTALLATION WORK PLAN <br /> May 1998 <br /> Former Chase Chevrolet (Madison) Facility <br /> 423 North Madison Street, Stockton, California <br /> 10. INTRODUCTION AND SCOPE OF WORK <br /> In accordance with the request of Mr Jeffery Setness of Hartmann & Setness, Advanced <br /> GeoEnvironmental, Inc (AGE) has prepared this Monitoring Well Installation Work Plan for 423 <br /> r North Madison Street, Stockton, California The location of the site is illustrated on Figure 1- <br /> Location Map Structures, well and boring locations are illustrated on Figure 2 - Site Plan <br /> This work plan is prepared in accordance with guidelines established by the San Joaquin County <br /> Public Health Services- Environmental Health Division (PHS-EHD) and Central Valley Regional <br /> Water Quality Control Board(CVRWQCB)for the investigation of underground storage tank (UST) <br /> saes <br /> L 20 , BACKGROUND t <br /> Seven USTs were removed from the site in May 1986 Nine nionitoriiig wells, and numerous soil <br /> boiings have been advanced at the site The extent of impacted soil and ground water has been <br /> defined for six of the seven USTs removed Seven borings have been advanced in the,area of UST <br /> No 8, and soil and grab water samples have been collected Impacted soil and ground water are <br /> evident beneath the former UST No 8 location Site history is summarized in the Revised Cor?ecave <br /> Action Plan - Februa?y 1997 and Site Investigation Report - UST No 8 prepared by AGE <br /> 3.0. SCOPE OF WORK <br /> 3 1 DRILLING AND SAMPLING <br /> The scope of work will include the advancement of three soil borings to total depths of <br /> approximately 50 feet below surface grade (bsg), collection of soil samples, and installation of three <br /> dual-completed 2-inch diameter ground water monitoring wells Soil borings will be advanced <br /> utilizing a truck-mounted drill ng equipped with 10-inch diameter hollow-stem augers <br /> Soil samples will be collected at five-foot intervals beginning at a depth of 5 feet bsg, and will be <br /> preserved and placed in a chilled container for transportation to a state-certified laboratory under <br /> chain-of-custody Soils will be described using the Unified Soil Classification System(USCS) Soil <br /> sample descriptions and PID screening results will be summarized on boring logs prepared for the <br /> final report , <br /> , <br /> ' Advanced CeoEm3ronmentai.Inc <br />