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STATE OF CALIFORNIA PETE WILSON, Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD— <br /> CENTRAL VALLEY REGION 3 <br /> 3443 ROUTIER ROAD, SUITE A <br /> SACRAMENTO, CA 95827-3098 �,�T� <br /> PHONE: (916) 361-5600 <br /> FAX: (916) 361-5686 <br /> JAN 1 1 ` <br /> ENVIRONMENTAL HEALTH <br /> 9 January 1991 PERMIT/SERVICES <br /> Ms. Sharon Bruno <br /> U. S. Army Carps of Engineers <br /> Sacramento District <br /> 650 Capitol Mall <br /> Sacramento, CA 95814-4794 <br /> REVIEW OF REPORT ON OXIDATION POND CONVERSION, SHARPE SITE, SAN JOAQUIN C UNTY <br /> We have received your minutes of the pre-design conference held on 17 Dec tuber <br /> 1990 to discuss the conversion of the oxidation pond to a storm water rete tion <br /> basin at the Sharpe Site. I have also prepared a memorandum regarding that <br /> meeting (enclosed) . The memorandum discusses our concerns with the data il the <br /> 8 November 1990 Mark Group's report entitled "Environmental Investigation, Pond <br /> Conversion Project" and which were expressed during our meeting. I have <br /> forwarded the memorandum as it may be helpful for future decisions regardin the <br /> conversion of the oxidation pond. <br /> Although it was decided in the conference to use the dilute citric acid a the <br /> extraction solution for the Waste Extraction Test (WET) , we recommend tha the <br /> WET be performed using deionized water. A more aggressive extraction sol tion <br /> may yield analytical results that would not be representative of the leali hate <br /> from the storm water retention basin. <br /> As discussed in the meeting, the storm water will need to be characterized. Upon <br /> review of our permitting requirements, more than one sample of storm water runoff <br /> will need to be collected from this wet season. This data, as well as <br /> information on the design and operation of the storm water basin will need o be <br /> submitted in an amended Report of Waste Discharge (RWD) . We consider the torm <br /> water retention basin to be part of your wastewater management facilities, 4hich <br /> will be regulated by your National Pollutant Discharge Elimination System (N )DES) <br /> permit. The original RWD for the domestic wastewater NPDES permit was submitted <br /> on 28 December 1989. After we receive a complete RWD, we will proceed to <br /> formulate tentative requirements, which will include updated monit ring <br /> requirements for both the domestic and storm water waste streams. <br /> Finally, because the data in the Mark Group report indicated that there a e no <br /> hazardous concentrations of residual wastes in the subsoils beneath the oxidation <br /> pond, it is not subject to the Toxic Pits Cleanup Act. By this letter we will <br /> notify the State Water Resources Control Board of our finding. In addition the <br /> Department of Health Services has indicated that the oxidation pond / storm water <br /> retention basin will not be regulated by either the Comprehensive Environmental <br />