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San Joaquin County <br /> PpUIN Environmental Health Department DIRECTOR <br /> Donna Heran,REHS <br /> 600 East Main Street <br /> PROGRAM COORDINATORS <br /> Stockton, California 95202-3029 <br /> Robert McClellon,REHS <br /> .lett Carruesco, REHS, RDI <br /> Website: www.sjgov.org/ehd Kasey Foley, REHSt_,ndaTurkatte,REHS <br /> Phone: (209) 468-3420 <br /> Fax: (209) 464-0138 <br /> December 9, 2011 <br /> Ms. Beverly Garcia <br /> Raymond Investment Corporation <br /> Post Office Box 567 <br /> Stockton, California 95201 <br /> Subject: Raymond Investment Corporation <br /> 730 Channel Street <br /> Stockton, California 95202 <br /> Dear Ms. Garcia: <br /> The San Joaquin County Environmental Health Department (EHD) received the annual five-year <br /> review update letter dated 18 August 2011 from the State Water Resources Control Board <br /> (SWRCB) Cleanup Fund (CUF) for the above-referenced site. The CUF has recommended that <br /> the EHD consider this site for closure. In light of this, the EHD has reviewed Third Quarter <br /> Groundwater Monitoring Report— August 2011, dated 18 August 2011, Remediation Feasibility <br /> Report, dated 25 August 2011, and historical soil and groundwater analytical data for your site <br /> prepared and submitted by your consulting firm, Condor Earth Technologies, Inc. (Condor). <br /> In Remediation Feasibility Report Condor provided the following estimates of the mass of <br /> benzene, toluene, ethylbenzene, total xylenes, total petroleum hydrocarbons as gasoline <br /> (TPH-G) and total petroleum hydrocarbons as diesel (TPH-D) in soil and groundwater at your <br /> site. <br /> Soil Groundwater <br /> Benzene 1.08 pounds 0.0097 pounds <br /> Toluene 0.94 pounds 0.004 pounds <br /> Eth (benzene 1.37 pounds 0.0093 pounds <br /> Xylenes 3.06 pounds _0.0103 pounds <br /> TPH-G 333.97 pounds 0.53 pounds <br /> TPH-D 802.90 pounds 1.02 pounds <br /> Based on these calculated estimates, Condor stated that more than 99 percent of the total mass <br /> of hydrocarbons is in soil and less than 1 percent is in groundwater at your site. Of the nine <br /> remedial methods evaluated in Remediation Feasibility Report, Condor recommended in-situ <br /> oxidation using peroxide and ozone injection as the preferred remedial alternative since this <br /> method targets the destruction of hydrocarbons in soil. Condor's itemized cost analysis for in- <br /> situ oxidation using ozone totaled $151,355.00, not including the cost for confirmation sampling <br /> of soil following remediation. <br />