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4 <br /> 7- <br /> W <br /> p <br /> San Joaquin County <br /> DIRECTOR <br /> Environmental Health Department <br /> Donna Homn.ns*o <br /> 1868 East Hazelton Avenue <br /> PROGRAM COORDINATORS <br /> Stockton, California 95205-0232 <br /> Robert mooe/mn. Rs*s <br /> Jenou,m0000. neno. no/ <br /> KaseyFoley, nsHa <br /> NXoba/bn/ vm*vus/gomn/o/ehd Linda Turxauo. ns*S <br /> Phone: (209) 468-3420 Rodney Estrada,nE*s <br /> Fox: (%DS) 464'0138 Adnennosxsaosnor, nsno <br /> January 1O. 2O14 <br /> Messrs. Kirk Larson, PG, and Robert Tn}nnnner' CHG <br /> State Water Resources Control Board <br /> Division Of Financial Assistance <br /> 1001 | Street <br /> Sacramento CA 95814 <br /> SUbi8Ct� 104 Beverly P|8C8 VV, T[8oy, CA^ 2013 Review SUnn0a[y Report Response CUF C|@inn # 0502 <br /> Gan Joaquin County Environmental Health Department (EHO) has received and reviewed the <br /> 2013 Review Summary Report (RSR) dated 02 December 2013 from Kirk Lai-son of the State <br /> Water Resources Control Board (GVV| CB) Cleanup Fund (CUF) for the above-referenced site. <br /> The CUF concluded that the site meets the criteria for cmoo closure under the Low-Threat <br /> Underground Storage Tank Case Closure Policy (LTCP) and the case should therefore be <br /> closed. <br /> The EHO @CkOOvv|edgeS that the site data and Some consultant conclusions can be used to <br /> demonstrate achieving LTCP criteria, but believes that the particular circumstances of the site <br /> still present a potential hazard to human health and does not concur with the recommendation <br /> for case closure. As noted in the RSR, the site in in residential use, and this usage has to some <br /> degree limited the remedial excavation and the site invostigation, and in the opinion of the EHO, <br /> presents a potentially higher health hazard. The EHO comments on the following points mode in <br /> the RSR and requests the Fund to reconsider closure of this site: <br /> * The most intensely impacted monitoring well K8VV'4 is identified as 3 source area m/e||; it <br /> is not. K8VV-4 is located approximately 125 feet dovvngradieOt of the former UST pit that <br /> is considered the Sou[oH area. <br /> * "The case meets Policy Criterion 1 by Class 1. The contaminant plume that exceeds <br /> water quality 0hi8ctives is less than 100 feet in length." As noted above, the most <br /> intensely impacted monitoring well K8VV'4 is over 100 feet from the source area, so the <br /> plume length must also exceed 100 feet. The site probably does meet the Policy through <br /> Class 2. <br /> ° The Fund has found that the depth to water ranges frorn 3.6 feet below surface grade <br /> (bag\ to 7.03 feat bsg, averaging approximately S feet bsg, and that the dissolved <br /> ` ' <br /> benzene concentrations are less than 100 micrograms per liter (pg/|), the EHO concurs. <br /> The Fund has also found most of the noDta[niDatod soil |iSe between O and 10 feet bsg, <br /> and that soil 5 feet bsg and shallower has |eee than 100 rni||iQranoo per kilogram /rng/Kg\ <br /> 2014 SRS Response CUF Claim No 8502.don <br />