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' 1 �1 flow Emcon ASSOCIATES Consultants in Wastes n e® Management and August 29 1988 Environmental Control Proposal 8807-03 Mr. Stephen S. Chen Deputy Public Works Director City of Stockton City Hall Stockton, California 95202-1997 Re: Ground-Water Investiga- tion, French Camp Land- fill Dear Mr. Chen: EMCON is pleased to submit this proposal to perform a ground-water investigation at the French Camp Landfill in Stockton, California. The scope of work will include the following tasks: • Installing of ground-water monitoring wells • Collecting and analyzing vadose zone soil samples • Determining the direction of ground-water movement The proposed locations of the ground-water monitoring wells are shown on Figure 1. EMCON made a preliminary evaluation of the direction of ground-water movement in the site area by reviewing the San Joaquin County Flood Control and Water Conservation District's ground-water contour map for the spring of 1986 (reprinted in forward Inc. Land- fill , Closure Plan, Eljumaily & Bulter Assoc. September 1987) . Although the site is on the edge of the District's contour map (water level data are not well defined) , the direction of ground-water movement appears to be to the east or northeast. The sloughs that border the site on three sides do not appear to affect the ground-- water flow direction. Based on these preliminary data, the three monitoring wells proposed for the site are positioned to best define the direction of ground- water movement and to determine if the landfill has impacted ground- water quality. Monitoring Well MW-1 is located in an apparent upgrad- fent position and will be used to determine background water quality. 1921 Ringwood Avenue, San Jose, California 95131, (408)TI5-1444