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California Pogional Water Quality Co of Board <br /> Central Valley Region <br /> Katherine Hart,Chair <br /> Secretary for Linda Adams 11020 Sun Center Drive#200, Rancho Cordova, California 95670-6114 Arnold <br /> Environmental Phone(916)464-3291 •FAX(916)464-4645 Schwarzenegger <br /> Protection http://www.waterboards.ca.gov/centralvalley Governor <br /> 30 July 2010 n�V� � V [� <br /> Mr. Kirk Williams <br /> AUG 0 2 2010 <br /> Crop Production Services ENVIRONMENT HEALTH <br /> 3005 Rocky Mountain Avenue PERMIT/SERVICES <br /> Loveland, CO 80538-9001 <br /> REMEDIAL ACTION AT CROP PRODUCTION SERVICES STOCKTON FACILITY, 1905 <br /> NORTH BROADWAYAVENUE, SAN JOAQUIN COUNTY <br /> The Crop Production Services (CPS) site at 1905 Broadway Avenue in Stockton has a <br /> groundwater pollution plume that contains 1,2-dichloropropane (1,2-DCP), 1,2,3- <br /> trichloropropane (1,2,3-TCP) and other constituents that extends beyond the facility <br /> boundaries. These pollutants appear in the second and third water-bearing zones off-site, and <br /> may be within the radius of influence of a nearby water supply well. <br /> A pilot project evaluating zero-valent iron was initiated in November 2006. The pilot study was <br /> implemented by Geosyntec Consultants. CPS has replaced Geosyntec Consultants with ATC <br /> Associates. <br /> In a 14 April 2010 telephone discussion between Mr. Dave Evans of ATC Associates and <br /> California Regional Water Quality Control Board, Central Valley Region (Central Valley Water <br /> Board) staff, ATC indicated that it would send a letter on CPS' behalf that would outline CPS' <br /> strategy for remediation and a schedule for implementation. To date, Central Valley Water <br /> Board staff have not received a letter or statement of intent. CPS needs to prepare and, upon <br /> Central Valley Water Board staff concurrence, implement a remedial action plan to remove the <br /> mass of contaminants in groundwater resulting from past practices at the facility. <br /> By 27 August 2010, CPS must provide a letter describing what course of action Crop <br /> Production Services intends to pursue to remove 1,2,3-TCP and 1,2-DCP from the <br /> groundwater, and by 30 September 2010 provide a Remedial Action Plan and a schedule for <br /> implementation. <br /> CPS's failure to make progress towards cleanup of the groundwater will result in the <br /> consideration of enforcement actions by the Central Valley Water Board against Crop <br /> Production Services. <br /> If you have any questions, you may contact me by telephone at (916) 464-4680 or by email at <br /> ate rell@w terbirds.ca.gov. <br /> r <br /> I� L�1, I` � <br /> AMY TERRELL <br /> Private Sites Cleanup Unit <br /> California Environmental Protection Agency <br /> ZaRecycled Paper <br />