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Y • <br /> California Regional Water Quality Control $cardn <br /> Central Valley Region ENVIRONMENT He <br /> Winston H.Hickox Robert Schneider,Chair PERMIT/SERVif;:c. <br /> U'/ray Davis <br /> Secretary jSacramento Main Office Governor <br /> Environmental <br /> l Internet Address: http://—.8w b.ca.gov/mgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,California 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> 3 July 2003 <br /> Mr. Ken Price <br /> Miller Springs Remediation Management, Inc. <br /> 2480 Fortune Dr., Suite 300 <br /> Lexington, KY 40509 <br /> REUSE OF STORED RUNOFF WATER, GROUNDWATER CLEANUP CRITERIA, <br /> OXYCHEMSTOCKTON, SANJOAQUIN COUNTY <br /> We have reviewed the 12 June 2003 letter prepared by your consultant, Geomatrix Consultants, <br /> requesting to use treated stormwater as an irrigant in the phytoremediation plot that Miller <br /> Springs Remediation Management (MSRM) is developing at the former agricultural chemical <br /> facility at 1904 Charter Way in Stockton. We also reviewed the 26 February 2003 letter prepared <br /> by Geomatrix commenting on the Groundwater Cleanup Criteria Table we transmitted to MSRM <br /> in our 21 January 2003 letter. <br /> TREATED RUNOFF WATER <br /> In late October 2002, MSRM excavated approximately 2,000 cubic yards of pesticide <br /> contaminated soil and treated it with an on-site mobile thermal desorption process. It rained <br /> during the course of the excavation and treatment, and about 42,000 gallons of runoff were <br /> captured and stored in tanks on-site. In its 12 June 2003 request letter, MSRM proposes to <br /> process the runoff through a granulated activated carbon filter; analyze the treated water for <br /> volatile organic compounds, fumigants, triazine herbicides, chlorinated herbicides, <br /> carbamate/urea compounds, nitrogen compounds and chloride; store the treated water on-site; <br /> dilute it 1:1 with municipal water; and apply the treated and blended water as irrigant to the <br /> phytoremediation plot as needed. We conditionally approved the phytoremediation work plan in <br /> our 12 July 2002 letter. <br /> In the 12 June 2003 letter, your consultant, Geomatrix Consultants,provided analytical results <br /> describing the composition of the untreated water and the results of a 10,000-gallon test run of <br /> this water through the liquid carbon filter. The treated water contained no detectable <br /> concentrations of the organic constituents of concern: 1,2,3-trichloropropane (1,2,3-TCP), <br /> 1,2-dichloropropane, dibromochloropropane(DBCP), 2,4,5-trichlorophenoxy acetic acid <br /> (2,4,5-T), dinoseb, or trifluralin. The treated water did contain 197 mg/l chloride, 393 mg/1 <br /> nitrate(as 1), and 71.7 mg/1 ammonium. The concentration of nitrate and ammonium in this <br /> California Environmental Protection Agency <br /> Co Recycled Paper <br /> The energy challenge facing California is real. Every Californian needs to take immediate action to reduce energy consumption. Fora list of <br /> simple ways you can reduce demand and cut your energy costs,see our Web-site at http://www.swrcb.ca.gov/mgcb5 <br />