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I <br /> William Hemphill <br /> Page 2 <br /> APR 1 1991 <br /> If groundwater extraction is to be used as a remedial action the <br /> method of disposal for any extracted water is to be finalized <br /> before extraction begins. If water is to be discharged to land as <br /> proposed in one alternative of the January 24, 1991 report, a <br /> permit or written permission must be obtained from Central Valley <br /> Regional Water Quality Control Board (CVRWQCB) . In this <br /> alternative you discussed pre-treatment of water through a carbon <br /> drum if detectable levels of contaminants were found. The water <br /> would be required to be tested after the carbon treatment and the <br /> results be non-detectable before the water could be discharged to <br /> the land. The other alternative of discharging the extracted water <br /> to the Manteca City sewer system would require a permit from that <br /> agency. <br /> Prior to any remedial action pursuant to Sec. 280. 67, Subpart F of <br /> 40CFR of the Federal Register our agency will conduct a public <br /> notice to consider comments on your Final Remedial/Corrective <br /> Action Plan. <br /> Therefore, an Executive Summary and a draft Remedial Plan should be <br /> provided to this office prior to any groundwater extraction. The <br /> draft Final Remedial Report (FRP) should provide a summary of: <br /> -data obtained during the Remedial Investigation/Feasibility <br /> Study <br /> -identifiable remedial alternatives <br /> -risks associated with conditions at the site, as well as <br /> risks with the identifiable alternatives <br /> -the proposed and implemented remedial alternatives. <br /> If you have any questions contact Margaret Lagorio, Senior REHS, at <br /> (209) 468-3449 . <br /> Jogi Khanna, M.D. , M.P.H. <br /> Z <br /> icer <br /> Cotulla, REHS, Program Manager <br /> tal Health Division <br /> LAC/ML:nr <br /> c: CVRWQCB <br /> c: WHF Environmental Consultants <br /> P.O. Box 6729 <br /> Modesto, CA 95355-6729 <br /> i <br />