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California Regional Water Quality Control Board <br /> Central Valley Region <br /> Robert Schneider,Chair <br /> Alan C.Lloyd Ph.D. Arnold Gohw nrczenegger <br /> Agency Secretary Sacramento Main Office <br /> Internet Address: http://www.swrcb.ca.gov/—rwgcb5 <br /> 11020 Sun Center Drive,#200,Rancho Cordova,CA 95670.6114 <br /> Phone(916)464-3291 •FAX(916)4644780 <br /> 5 May 2005 <br /> Q � f ) <br /> Rodney Schatz EMRRW.iENT H' ' <br /> 18247 N. Tretheway Road PERMIT.,/SER1'i� S <br /> Lockeford, CA 95237 <br /> SECOND CONDITIONAL APPROVAL, GROUNDWATER MONITORING WELL <br /> INSTALLATION WORKPLAN, SCHATZ WINERY,ACAMPO, SAN JOA QUIN COUNTY <br /> I have reviewed the Addendum 1: Response to Conditional Approval Letter,prepared by Professional <br /> Geotechnical Consultants, dated 14 March 2005. The plan was required by Waste Discharge <br /> Requirements Order No. R5-2004-0035, Provision G.l.c. <br /> After reviewing the Addendum, I have the following comments: <br /> — The workplan is not clear on how the well will be constructed with a minimum two-inch annular <br /> seal. Please include a typical well construction detail in your response and ensure that it is <br /> consistent with the California Well Standards Bulletin 74-90 (Part Il, Section C), which requires <br /> a minimum two-inch annular seal. <br /> — Sand pack surging, prior to installation of the bentonite transition seal, to consolidate the filter <br /> pack should be performed using a surge block. Addition of water to the well should be avoided <br /> unless needed for a specific purpose such as controlling flowing sands. Any water that is added <br /> to the well should be subsequently pumped out of the well. <br /> — The Sampling and Analysis Plan (SAP) does not list all the analytes contained in the <br /> groundwater section of Monitoring and Reporting Program No. R5-2004-0035. Please add <br /> chloride and sulfate to the list of analytes and resubmit the SAP. The SAP only needs to address <br /> the groundwater constituents. <br /> — The site map presented in the workplan does not adequately present the locations of the proposed <br /> wells. Please revise the site map to clearly present the well locations. Wells shall be located to <br /> characterize groundwater quality upgradient of any site wastewater sources and downgradient of <br /> all wastewater storage or application areas. <br /> The workplan is approved on the condition that the above comments are addressed in an addendum letter <br /> that is submitted by 6 June 2005 to be submitted prior to installation of the wells. Please note that the <br /> WDRs required groundwater monitoring to begin in the fourth quarter, 2004; this project is significantly <br /> behind schedule. To avoid imposition of an Administrative Civil Liability (monetary fine) as a result of <br /> being behind schedule, please submit the addendum letter by the date indicated above. <br /> California Environmental Protection Agency <br /> Ca Recycled Paper <br />