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CaliforniaWegional Water Quality Co> l Board <br /> ,r; <br /> Central Valley Region <br /> a <br /> Robert Schneider,Chair � N� <br /> Dan Skopec Arnold <br /> Acting Secretary Sacramento Main Office Schwarzenegger <br /> 11020 Sun Center Drive#200,Rancho Cordova,California 95670-6114 Governor <br /> Phone(916)464-3291•FAX(916)464-4645 <br /> http://www.waterboards.ca.gov/centralvalley <br /> 20 April 2006 <br /> Joseph Salzman <br /> Lockeford Community Service District <br /> P.O. Box 2 <br /> Lockeford, California 95237-002 <br /> CONDITIONAL APPROVAL, GROUNDWATER MONITORING WELL INSTALLATION <br /> WORKPLAN, CITY OF LOCKEFORD WASTEWATER TREATMENT FACT ITY, SAN <br /> JOAQUIN COUNTY j Z Z X S r j C c- <br /> Staff has reviewed the March 2006 Groundwater Monitoring Well Installation Workplan, <br /> prepared by EcoLogic Engineering. The Workplan was prepared to allow investigation of <br /> groundwater conditions at the existing wastewater ponds and characterization of groundwater <br /> conditions at a proposed land application and wastewater storage pond location. We have <br /> determined that additional information is required. Please address the following items listed <br /> below: <br /> • The well casing bottom plug is not described; please use a threaded cap for the bottom of <br /> the well casing or secure a slip cap with stainless steel screws. Please submit a revised <br /> Figure 6 showing the change. <br /> • The description of the protective surface casing when using a traffic rated Christy box is <br /> described as cement. Please use concrete of an adequate thickness to ensure a long <br /> service life of the wellhead. Please submit a revised Figure 7 showing the change. <br /> Please address the items listed above prior to implementing the Workplan. If you have any <br /> questions on this Conditional Approval, please contact me at (916) 464-4616. <br /> TIMOTH R. O'BRIEN <br /> Waste Discharge to Land Unit <br /> cc: Margaret Lagorio, San Joaquin County Environmental Health Department, Stockton <br /> Thomas Butler II, P.G., EcoLogic, Stockton <br /> Dennis Nakamoto, ENGEO, Roseville <br /> California Environmental Protection Agency <br /> V4 Recycled Paper <br /> W\StafA0brien1\San JoaquinTockeford\Salzman 19 Apr 06.doc <br />