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Tit <br /> SECOR <br /> i�I� <br /> /rrlrrrrrli„rrrr/ /n< ,r�,,,rrrlc ( <br /> November 13, 1995 <br /> Ms. Gail Wiggett, C.E.G. <br /> Associate Engineering Geologist <br /> Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road, Suite A <br /> Sacramento, California 95827-3098 <br /> REQUEST FOR ADDITIONAL INFORMATION,TOWER PARK MARINA, 14900 WEST HIGHWAY €` <br /> 12, LODI, CALIFORNIA s <br /> Dear Ms. Wiggett: <br /> i <br /> SECOR International Incorporated (SECOR) is to providing this letter in response to your letter to <br /> SECOR dated November 6, 1995 for Tower Park Marina located at 14900 West Highway 12 near Lodi, <br /> California (the Site). The Quarterly Groundwater Monitoring Report for the third quarter of 1995, t <br /> recently submitted to the Regional Water Quality Control Board (RWQCB) recommended a change in <br /> the free product monitoring and removal procedures and installation of Oxygen Release Compound(ORC) <br /> Filter Socks in three Site wells. These recommendations were discussed with you in a November 3, 1995 <br /> telephone conversation. Your November 6, 1995 letter requested the following additional information: a <br /> F <br /> • How product bailed from well MW-3 will be stored, for how long, and how it will be T <br /> disposed. <br /> The nature of the matrix material in the ORC Filter Socks and the nature of residuals left `. <br /> after the oxygen is released. <br /> • How the effectiveness of the ORC Filter Socks will be monitored. <br /> Free Product Storage and Disposal <br /> Purged groundwater and free product generated during bailing of well MW-3 and decontamination water <br /> from skimmer cleaning will be stored on-site in 55-gallon drums and disposed of appropriately at three <br /> month intervals by Marina personnel. A summary of these activities will be included in the quarterly <br /> monitoring report for the fourth quarter of 1995. <br /> ORC Filter Sock Information <br /> ORC Filter Socks will be installed in wells MW-2, MW-3, and MW-4 on November 15, 1995. The <br /> ORC Filter Socks are from REGENESIS Bioremediation Products and contain magnesium peroxide and <br /> release oxygen at a slow, controlled rate enhancing natural bioremediation. The matrix material for these <br /> Filter Socks is polyester and therefore, will pose no threat to groundwater quality. The residual product <br /> remaining in the Filter Socks following the release of oxygen is magnesium hydroxide which also poses <br /> no threat to groundwater quality and requires no special disposal procedures. <br /> 90.A'cu :llurNgurnrr� Sh ct1, SrrilcC>>U, .Sn,r l'rn,rcisc,,, t.A ().//05-450.; (415),1'R2-15 j8 I-4/5/,58')-i 106 l l V <br />