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' Monitoring Well Destruction and <br /> Soil and Groundwater Investigation Report <br /> US Can—Welty Road <br /> September 24,2009 <br /> • Update the water-well search performed in 2004 to evaluate the current status of water- <br /> supply wells within 2,000 feet of the site. <br /> ' • SAIC recommends that the area northwest of SB-28, including borings SB-38 through <br /> SB 43, be grouped and further investigated as a new site separate from the US Can-Welty <br /> ' Road site. This recommendation is based on the different source areas and the distance <br /> between the above-named borings and the original point of investigation in 1995. A <br /> work plan for the new site will be prepared under separate cover. <br />' 7. REFERENCES <br /> CDPH, 2004. Maximum Contaminant Levels(MCLS), (internet database). August. <br /> DWR, 2003. California's Groundwater, Bulletin 118, 2003 Update. <br /> EPA, 2008a. Regional Screening Levels for Chemical Contaminants at Superfund Sites. <br />' http;//www.epa. ov/re�ion9/waste/sfund/prg/index html#pr table. September. <br /> 2008b. Test Methods for Evaluating Solid Waste, Physical/Chemical Methods. Update <br /> 1V of the Third Edition. January. <br /> Geomatrix Consultants, Inc., 2005. Technical Approach to Site Evaluation and Decision <br /> Making, Historical Pipeline Portfolio, Central Valley Region. February. <br />' RWQCB (Central Valley), 2000. A Compilation of Water Quality Goals, report prepared by Jon <br /> B. Marshack, D.Env. August. <br />' (Central Valley), 2007a. Review of Well Abandonment and Soil and Groundwater <br /> Investigation Workplan, US Can-Welty Road Property, Vernalis, San Joaquin County. <br /> October 11. <br /> , 2007b. Water Quality Control Plan (Basin Plan)for the Sacramento River Basin and <br /> the San Joaquin River Basin, 4th ed. October. <br />' (Central Valley), 2008a. Review—Well Abandonment Report and Amended Soil and <br /> Groundwater Investigation Workplan, US Can-Welty Road Property, Vernalis, San <br /> Joaquin County. November 21. <br />' (San Francisco Bay), 2008b, Screening for Environmental Concerns at Sites with <br /> Contaminated Soil and Groundwater(Interim Final). May. <br />' SAIC, 2007. Well Abandonment and Soil and Groundwater Investigation Work Plan, US Can- <br /> Welty Road, Vernalis, California. September 28. <br /> 2008. Well Abandonment and Soil and Groundwater Investigation Work Plan <br />' Addendum, US Can-Welty Road, 35275 Welty Road, Vernalis, California. November <br /> 21. <br />' State Water Resources Control Board, 2008. A Compilation of Water Quality Goals. July. <br /> United States Geological Survey 7.5 Minute Topographic Quadrangle Map, Vernalis, California, <br />' 1980. <br /> 10 In HE <br /> �i- IRAN <br /> i .® <br /> From science to Solutions <br />