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California L gional Water Quality Cont Board <br /> Central Valley Region °1 <br /> a <br /> J <br /> Karl E.Longley,ScD,P.E.,Chair <br /> Linda S.Adams Arnold <br /> Secretary for Sacramento Main Office Schwarzenegger <br /> Secre aryforEnvirOWnenfa/ 11020 Sun Center Drive:X200,Rancho Cordova,California 95670-6114 Governor <br /> e <br /> Protection Phone(916)464-3291 •FAX(916)464-4645 <br /> httpi//www.waterboards.ca.gov/centralvalley n VE10) <br /> ���� <br /> 29 October 2007 NOV ..o 12007 <br /> ENp�RM17ENT HEALTH <br /> tSERVICES <br /> Mr. Allan Fetters <br /> 3705 Portsmouth Circle North <br /> Stockton, CA 95219-3842 <br /> CONDITIONAL CONCURRENCE WITH SITE C.HARACTFRIZATION WORK PLAN, RIPON <br /> FARM SERVICE, 938 FRONTAGE ROAD, RIPON, SAN JOAQUIN COUNTY <br /> Thank you for meeting with Mr. Duncan Austin and me on 17 October 2007. We discussed <br /> site features and the 3 September 2007 Site Characterization Workplan (Work Plan) prepared <br /> by Genesis Engineering and Redevelopment. Incorporating agreements made during our <br /> meeting discussion, Central Valley Regional Water Quality Control Board (Regional Water <br /> Board) staff concur with some elements of the Work Plan, and defer other elements as <br /> discussed below. <br /> • The integrity of the sumps and concrete ponds will be evaluated by means of a water <br /> containment test as proposed in the Work Plan. The timing of the test will be weather- <br /> dependent, since the sumps and pond are needed for stormwater containment, and we <br /> have entered the storm season. <br /> • Ripon Farm Service will provide a brief work plan for shallow soil sampling using a hand <br /> auger. The results of the shallow soil samples will be used to refine the locations for <br /> deeper soil samples that will be obtained as described in the Work Plan. When the results <br /> are available, Ripon Farm Service will provide a Soil Sampling Addendum to the Work Plan <br /> that will illustrate revised sampling locations and depths. <br /> • The supply well has a PVC liner and videoiogging of the weil casing will need to be <br /> postponed until municipal water is plumbed to the site. The sleeve will need to be removed <br /> before a videolog can proceed. This portion of the Work Plan is deferred until water supply <br /> connections have been made. <br /> • The Work Plan proposes measuring groundwater elevations with pressure transducers in <br /> selected shallow monitoring wells, the on-site supply well and the agricultural well in <br /> conjunction with pilot testing of City of Ripon's W-12 and with operation of the on-site <br /> supply well. Regional Water Board staff concur with this element of the Work Plan. The <br /> implementation will be contingent on coordinating with the City of Ripon in regards to W-12 <br /> testing schedule, will depend on the pumping rate of the pilot testing, and will be contingent <br /> on finding end-uses for water pumped from the on-site water well. By 16 November 2007, <br /> provide Regional Water Board staff with an update of the progress in implementing this <br /> element. <br /> California Environmental Protection Agency <br /> �l$Recycled Paper <br />