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Sep 27 04 04: 23p Flv;-' on Environ-mental 714x'-56642 p. 2 <br /> 09-12-99 03:56pm From-WASNINGTON'NkAL B 9498334667 ~"'T-395 P 02/03 F-847 <br /> California Regional 'mater Quality Control Board <br /> Qs; Central Valley Region <br /> Winston H.Hickox Steven T.Butler,Chair I@ <br /> Gray Davis <br /> secretary for Sacramento Main Office Governor <br /> Environmental Inicmct Address: hm-11www.swreb.ca.gov/-cwgc175 <br /> Protection 3443 Routier Road,Suite A,Sastamvlo,Ca:if=ia 95827-3003 <br /> Phone(916)255-3000-FAX(916)255-3015 <br /> 10 August 1999 <br /> Mr.Brian Wallcer <br /> Washington Mutual Bank <br /> 17875 Von Karman,Third Floor <br /> Irvine,CA 92714 <br /> REQUEST FOR NO FURTHIE 1.4.CT10N,AMERICAN SAYINGS BA-NTIy 222 NORTH EL <br /> DORADO STREET,STOCKTON,SAN J•OAQUIN 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 Recommendations 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.Jun Van do 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 ou the HRA.In a 25 rune 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 /> bark anti/ 1982. Arne.ica_n Savings and Loan used the b'_:ilding from 1984 to 1988. The buildirlg 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 TPH TFHmo Benzene Toluene Eth /benzene Xylenes . MTBE <br /> 6/11197 <0.5 53 •<0.5M<0.3 <0.3 <0,3 <0.3 <10 <br /> <0.5 <0.5 Not <br /> 50 <50 <500 Anal zed4/22/98 140 110 <500 <0.5 <05 <1<50 <500 <0.5 <0.5 <l <br /> 12/8/98 <50 <br /> <So <250 <0.5 0.55 <0.5 <0.5 N ted <br /> California Environmental Protection Agency <br /> �, Rrcycled Paper <br />