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California Regional Water Quality Control Board <br /> <LN j Central Valley Region <br /> Katherine Hart, Chair (a <br /> 11020 Sun Center Drive,#200,Rancho Cordova,California 95670-6114 <br /> Linda S.Adams - (916)464-3291 •FAX(916)469-0645 Edmund G.Brown Jr. <br /> Acting Secretary for http://www.walerboards.ca-gov/centralvalley Governor <br /> Environmental Potection <br /> 7 June 2011 <br /> Mr. Arnold Hof <br /> 28537 E. River Road <br /> Escalon, CA 95320-9629 <br /> FORMER CAL FARM SUPPLY, 2040 W. WASHINGTON STREET, <br /> SAN JOAQUIN COUNTY <br /> In about 2001, you purchased property at 2040 West Washington Street (Site)that <br /> contained.nitrat petmlo � P hexachlodde.in groundwater. Annual—---_. -- - <br /> groundwater monitoring that you have conducted pursuant to Monitoring and Reporting <br /> Program No. R5-2004-080.5 shows that your phytoremediation efforts have reduced <br /> nitrate concentrations in soil and groundwater, and petroleum compounds have not <br /> been detected for several years. <br /> The environmental sampling and analysis data for this Site indicates that the site may <br /> be a candidate for a no further action determination from the California Regional Water <br /> Quality Control Board, Central Valley Region (Central Valley Water Board). In order for <br /> Central Valley Water Board staff to consider whether no further action is appropriate, <br /> four consecutive quarters of groundwater monitoring for the following constituents in the <br /> monitoring wells, as identified in the Monitoring and Reporting Program, are necessary. <br /> • nitrate, petroleum hydrocarbons as gasoline and as diesel, MTBE, and benzene <br /> hexachloride. <br /> After reviewing the four quarters of data, Central Valley Water Board should be able to <br /> ascertain if the site-can be recommended for closure. Please conduct groundwater <br /> monitoring of the existing wells in the 3rd quarter(August—September 2011), and <br /> provide a report by 1 November 2011. <br /> We l9ok forward to-working-with you to conclude the Central Valley_Water Board's <br /> involvement with the facility. If you have any questions, you may contact me by <br /> telephone a x916) 464-4680, or by email at aterrell0waterboards.ca.gov. <br /> AlRROE LL <br /> Private Sites Cleanup Unit <br /> cc: Mr. R. David Smith, J.D. Smith Consulting, EI Dorado <br /> Mr. Michael Infuma, San Joaquin County Environmental Health Dept., Stockton <br /> California Environmental Protection Agency <br /> ¢aRecycled Paper - <br />