Laserfiche WebLink
30 <br /> ENVIROM ET RIX <br /> Environmental Consultants <br /> San Joaquin County Public Health Services April 26, 1996 <br /> Environmental Health Division <br /> P.O.Box 338 <br /> Stockton,California 95201-0388 <br /> Attention: Mr.Mike Infurna <br /> ADAENDUMN& I <br /> SOLE REMEDIATION WORKPLAN <br /> 25 ACRE-"P%IN PROPERTY <br /> STOCKTON, CALIFORNIA <br /> EMC JOB No. 196341 <br /> Dear Mr.Infurna <br /> This letter presents an addendum to the soil remediation workplan dated April 5, 1996,prepared by <br /> Envirometrix Corporation(EMC)on behalf of Florsheim Homes. The 25-acre Ripkin property is <br /> located in Stockton, San Joaquin County,California(Plates 1 and 2). EMC proposes to excavate, <br /> transport and dispose of approximately 50 cubic yards(cy)of soil contaminated with <br /> Dichlorodiphenyltrichloroethane(DDT)and related compounds. <br /> BACKGROUND <br /> The 25-acre property has historically been used for agriculture. In 1989,Levine Fricke was <br /> contracted by the Grupe Development Company to perform an Environmental Site Assessment(ESA) <br /> on the property. The results of the ESA were presented a report titled Environmental Assessment <br /> Report, Ripkin Development Site, San Joaquin County, California, dated March 23, 1989. As part of <br /> the ESA,soil samples were collected for analysis for pesticides in an area once believed used for <br /> rinsing pesticide containers(Plate 3). <br /> The Total Threshold Limit Concentration(TTLC),established by the State Department of Health <br /> Services,and the county action limit for DDT and related compounds is 1.0 part per million(ppm) <br /> and the Soluble Threshold Limit Concentration(STLC)for DDT is 0.1 mg/L. Based on EMC's <br /> review of the ESA,DDT and related compounds were detected in concentrations exceeding the TTLC <br /> in one sample(Q l)at 1 foot below the ground surface(bgs)collected at northeast corner of the site <br /> (Plate 3). Samples were not analyzed for soluble DDT. <br /> PROPOSED SOII,REMEDIATION <br /> EMC proposes to excavate approximately 50 cy of DDT contaminated soil in the area presented on <br /> Plate 3. Dimensions of the excavation will be approximately 15 feet by 60 feet,to a depth of 1.5 foot. <br /> EMC will collect and analyze up to 11 clearance soil samples for both TTLC and STLC analysis. <br /> 3950 industrial Boulevard . Suite 200C . West Sacramento, CA 95691 . (916) 375-1000 . FAX (916) 375-1024 <br />