SITE INFORMATION AND CORRESPONDENCE

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^w CALIFORNIA REGIONYWATER QUALITY CONTROL BOARD Cal/EPA CENTRAL VALLEY REGION $ P 3443 Routier Road, Suite A Sacramento, CA 95827-3003 Phone(916) 255-3000 �;;,'? ( ? F`112: FAX(916) 255-3015 Pete Wilson,Governor 6 January 1998 Mr. Brian Walker American Savings Bank 17875 Von Karman, Third Floor Irvine, CA 92714 MONITORING AND REPORTING PROGRAM NO. 98-800, AMERICAN SAVINGS BANK, STOCKTON, SAN JOAQUIN COUNTY ,.......w..0 IS �vivi'iitGiiiig and I'�Epotttiigr tvgiatu(iv>nr) ivo. 98-800 for your property at 222 N. t:i Dorado Street in Stockton. The purpose of the MRP is to formalize the monitoring program currently being undertaken at the site. The current program includes monitoring of benzene,toluene,ethylbenzene, xylenes, total petroleum hydrocarbons as diesel and gasoline, and halogenated volatile organic compounds(VOCs). In addition to these constituents, MRP No. 98-800 specifies monitoring of semi-VOCs and dissolved cadmium, chromium, nickel, and zinc. These constituents are being added because they are associated with engine repair work,which used to be conducted at the site. In response to your objection to being called a"Discharger",we replaced all references to"Discharger"with "American Savings Bank". MRP No. 98-800 also incorporates our agreement with your consultant,Mr. Trevor Santochi, regarding monitoring of dissolved metals and semi-VOCs. As stated in the MRP, dissolved metals and semi-VOC monitoring is required at wells which have not been monitored for these constituents and will continue if they are found in these wells. You stated in your letter that the residual contaminants at the site pose a low risk and that the site should be considered for no further action at the earliest possible time. As I stated in my September 1997 letter, to be considered a low risk groundwater site, American Savings Bank must show that 1) Contaminants remaining in the vadose zone do not reverse or threaten to reverse the mass reduction rate of groundwater pollutants discussed in#4 below; 2) Separate phase product has been removed to the extent possible; 3)No existing water supply wells, deeper aquifers, surface waters, or other receptors are threatened by pollutants remaining in the aquifer; and 4)The total pollutant mass remainkig in the groundwater is decreasing at predicted rates and rieiiher creaies, nor threatens to create, a risk to human health and safety or future beneficial uses of the aquifer. To demonstrate compliance with Items 1 and 4 above, a minimum of four quarterly monitoring events are required. Therefore, after four quarterly monitoring events, American Savings Bank may submit a request for no further action. If you have any questions, please call me at(916) 255-3081. L, Cha, WENDY COHEN Senior Engineer PSI:psi/lsb cc: Mr. Michael Infurna, San Joaquin Public Health Services, Stockton Mr. Trevor D. Santochi, Santochi and Bravante, Newport Beach LOU Recycled Paper Our mission is to preserve and enhance the quality of California's water resources,and ensure their proper allocation and efficient use for the benefit of present and future generations.