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r . • <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> Alan C.Lloyd,Ph.D. Robert Schneider,Chair ip Arnold <br /> Secretaryfor Sacramento Main Office (���V Schwarzenegger <br /> 11020 Sun Center Drive#200 <br /> Environmental ,Rancho Cordova,California 95670.6 l�i eo Governor <br /> Protection Phone(916)4643291 •FAX(916)464-4645 V <br /> http://www.waterbouds.ca.gov/centralvalley AUG 2 9 <br /> 2005 <br /> 18 August 2005 E VIROWENT HEq�T <br /> RMIT/SERVICES H <br /> Mr. Frank Barone <br /> Miller Springs Remediation Management, Inc. <br /> 2480 Fortune Dr., Suite 300 <br /> Lexington, KY 40509-4168 <br /> REVIEW OF GROUNDWATER CLEANUP AND CONTINGENCY PLAN, 1904 CHARTER WAY, <br /> SAN JOAQUIN COUNTY <br /> At Occidental Chemical Company's former retail agricultural chemical distribution facility at <br /> 1904 Charter Way, Miller Springs Remediation Management, Inc. (MSRM) excavated and treated about <br /> 2,900 tons of contaminated soil in late 2001 and planted about 1,500 eucalyptus trees for additional soil <br /> remediation on the property in 2003. In September 2003, MSRM's consultant, Geomatrix Consultants, <br /> prepared a Feasibility Study/Remedial Options Evaluation Report for groundwater remediation that <br /> proposed phytoremediation and monitored natural attenuation for groundwater cleanup. Central Valley <br /> Regional Water Quality Control Board(Regional Board) staff responded in a 14 June 2004 letter <br /> concurring with the proposal and requested phytoremediation details and a contingency plan. MSRM <br /> and Geomatrix Consultants submitted the October 2004 Groundwater Cleanup and Contingency Plan. <br /> Groundwater Cleanup <br /> The groundwater cleanup portion of the document describes the maintenance and monitoring activities at <br /> the phytoremediation field, which include irrigation, annual analysis of plant tissue for constituents of <br /> concern, removal of leaf litter, replacement plantings as needed, and biannual soil sampling for <br /> carbamate, organochlorine, organophosphorurous, and nitrogen compounds. MSRM has engaged the <br /> services of a landscaping firm to manage the irrigation and maintenance of the phytoremediation field. <br /> In 2003, the initial year of soil sampling, MSRM did not detect triazine compounds, chlorinated <br /> herbicides, volatile organic compounds, or fumigants and recommended that these be removed from the <br /> soil sampling program. Regional Board staff concur with the removal of volatile organic compounds <br /> and fumigants from the soil program based on their apparent absence and mobility in the soil profile. <br /> The groundwater data obtained in 2004 and 2005 show that organophosphorous compounds are not <br /> found in groundwater, and MSRM proposes that this analysis also be removed from the soil sampling <br /> program. The groundwater monitoring data show that dinoseb, a chlorinated herbicide, and atrazine, a <br /> triazine compound, may be translocating from the soil column to groundwater. Therefore, MSRM needs <br /> to reinstate analyses for triazine compounds (EPA Method 619) and for chlorinated herbicides (EPA <br /> Method 8151), but Regional Board staff concur with MSRM's proposal to discontinue analyses for <br /> organophosphorous compounds in soil. MSRM may request revisions to the soil sampling plan in the <br /> 2006 Annual Report which is due 1 November 2006. <br /> California Environmental Protection Agency <br /> �� Recycled Paper <br />