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California Re Tonal Water Quality Cintrol Board "- <br /> Central Valley Region t <br /> • i � N <br /> Steven T.Butler,Chair <br /> Winston H.Hickox Cray Davis <br /> Secretary for Sacramento Main Office -. r Governor <br /> Environmental Internet Address: http://www.swrcb.ca.gov/--rwgcb5 <br /> Protection 3443 Routier Road,Suite A,Sacramento,Califomia 95827-3003 <br /> Phone(916)255-3000•FAX(916)255-3015 <br /> 10 August 1999 <br /> Mr. Brian Walker <br /> Washington Mutual Bank <br /> 17875 Von Karman, Third Floor <br /> Irvine, CA 92714 <br /> REQUEST FOR NO FURTHER ACTION, AMERICAN SAVINGS BANK, 222 NORTH EL <br /> DORADO STREET, STOC KTON, SAN JOAQUIN COUNTY <br /> On your behalf, Mr. Trevor Santochi of Avalon Environmental Consultants submitted a no further action <br /> (NFA) request on 20 April 1999 along with a Site-Specific Health Risk Assessment (HRA) for the <br /> former American Savings Bank (now owned by Washington Mutual Bank) at 222 North El Dorado <br /> Street in Stockton. We also have reviewed the case file the site. <br /> The NFA request was submitted in accordance with Appendix B (No Further Action Requests) of the <br /> Tri-Regional Board Staff Recommendation for Preliminary Investigation and Evaluation of <br /> Underground Tank Sites. The Health Risk Assessment (HRA), which was conducted by Ms. Teri <br /> Copeland and Mr. Jim Van de Water, assesses risks to human health and potential impacts of residual <br /> _contaminants in soil beneath the site to groundwater. The HRA was conducted in accordance with the <br /> Department of Toxic Substances Control and U.S. Environmental Protection Agency guidance. We had <br /> no comments on the Appendix B submittal,but provided comments on the HRA. In a 25 June 1999 <br /> letter, Ms. Copeland and Mr. Van de Water adequately addressed our comments on the HRA. <br /> From 1917 to 1956, the site was used as an automotive repair facility which also dispensed gasoline. <br /> State Savings and Loan constructed a two-story office building at the site in 1961 and operated it as a <br /> bank until 1982. American Savings and Loan used the building from 1984 to 1988. The building is <br /> currently vacant. Groundwater testing for oxygenates including methyl tertiary butyl ether(MTBE) showed <br /> nondetectable levels. Table 1 shows these results and the rest of five quarterly sampling events for <br /> monitoring well (MW)4,which is downgradient from the site. <br /> Table 1 –Quarterly Groundwater Monitoring Results for MW 4 <br /> Date TPHd TPHg TPHmo Benzene Toluene Eth (benzene X leues MTBE <br /> 6/11/97 <0.5 53 <0.5 <0.3 <0.3 <0.3 <0.3 <10- <br /> 1/12/98 50 <50 <500 <0.5 <0.5 <0.5 <0.5 Not <br /> Analyzed <br /> 4/22/98 1 140 110 <500 <0.5 <0.5 <0.5 <0.5 <11 <br /> 9/29/98 1 74 <50 <500 <0.5 <0.5 <0.5 <0.5 <1 <br /> 12/8/98 <50 <50 <250 <0.5 0.55 <0.5 <0.5 =. Not d <br /> California Environmental Protection Agency <br /> *a Recycled Paper <br />