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0 0 <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> Alan C.Lloyd Ph.D. s <br /> Robert Schneider,Chair <br /> Agency Secretary Sacramento Main office Arnold Schwarzenegger <br /> 11020 Sun Center Drive,4200,Rancho Cordova,CA 95670-6114Governor <br /> Phone(916)464.3291•FAX(916)464-0780 ���',L `/M�D <br /> http://www.waterbouds.ca.gov/centralval ley p <br /> FEB 2 7 2006 <br /> 24 February 2006 ENVIRONMENT IIEALTH <br /> PERMIT/SERVICES <br /> Carl Ryalls <br /> California Nuggets <br /> 23073 S. Fredrick Road <br /> Ripon, CA 95366 <br /> REPORT OF WASTEDISCAARGE, REQUEST FOR ADDITIONAL GROUNDWATER QUALITY <br /> INFORMATION, CALIFORNL9 NUGGETS,RIPON,SAN JOA Q UIN COUNTY <br /> Regional Board staff has reviewed the 17 October 2005 Baseline Groundwater Quality Assessment <br /> (Assessment)prepared by Kleinfelder. The report was prepared to complete a Report of Waste <br /> Discharge submitted as part of the application for Waste Discharge Requirements. <br /> The Assessment describes installation of four groundwater monitoring wells designed to characterize <br /> shallow groundwater quality both upgradient and downgradient of the facility. The Assessment reported <br /> an unexpected trend in groundwater quality; the well located upgradient of all waste application areas <br /> Possessed groundwater of poorer quality than wells located downgradient of wastewater application <br /> areas. Before staff prepares tentative WDRs, confirmation of groundwater quality conditions is needed. <br /> By 27 April 2006, please submit a groundwater monitoring sample event report for the facility. All the <br /> wells shall be sampled in this event. Please test the samples for the same analytes presented in Table 5 <br /> of the Assessment. <br /> Appendix E presents the Monitoring Well Sampling Logs; staff has noticed that the wells are being <br /> purged of only the volume of water within the well casing (approximately 0.51 gallons for each foot of <br /> groundwater that existed in the well). Please increase the purge volume to include the volume of <br /> groundwater in the sand pack plus the well casing. For a two-inch diameter well casing installed in an <br /> eight-inch soil boring, approximately 2.6 gallons should be purged for each foot of groundwater that <br /> exists in the well. <br /> If you have any questions on this information please telephone me at (916)464-4616. <br /> TIMOTH O'BRIEN <br /> Waste Discharge to Land Unit <br /> cc: Mike Huggins, San Joaquin County Environmental Health Department, Stockton <br /> Joe Zilles, P.G., Meinfelder, Stockton <br /> California Environmental Protection Agency <br /> w:w de.nWn mnymmcai sMen YMN 22 kbdoc :�e�Recycled Paper <br />