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WSTATE OF CALIFORNIA—RESOURCES AGENCY �• <br /> �• EDMUND G. BROWN JR., GOVERNOR <br /> CALIFORNIA REGIONAL WATER QUALITY CONTI? OARD- <br /> CENTRAL VALLEY REGION <br /> 7201 S STREET <br /> SACRAMENTO, CALIFORNIA 95816 (\ <br /> PHONE (916) 415-0270 NN 24 July 1978 <br /> 452-3977 <br /> 10171 <br /> l`., u �) <br /> Mr. Stephen R. Thumlert " I ' ll <br /> R. W. Siegfried & Associates JUL `P, 5 1S78 2�J <br /> 4045 Coronado Avenue <br /> Stoc ton, SAN -JOAQUIN .I,GCAL <br /> Dear Mr. Thumlert: I��''�TI I DISTRICT <br /> Thank you for the opportunity to review the plans and calculations for Beaver <br /> Chemical Company's proposed wastewater treatment facility. <br /> We favor your proposal to collect surface runoff from the yard on the north and <br /> south side of the building, and to dispose of yard runoff and washwater by <br /> evaporation from a lined pond. <br /> The pond is designed to contain yard runoff and washwater for approximately a <br /> 15 year frequency storm, which should be adequate. The estimate is, however, <br /> based on evaporation of rainwater. In sizing the pond, consideration should <br /> be given to evaporation of chemicals, including detergents, as the evaporation <br /> of chemicals may be different than that of rainwater. <br /> Waste discharge requirements that will be drafted for Beaver Chemical Company <br /> will contain the provision that discharge to surface waters or surface water <br /> drainage courses, either by direct discharge or runoff from the pond, is pro- <br /> hibited. It should be understood that if the pond approaches spillage, the <br /> company will be required to haul pond water to a suitable disposal site or take <br /> other appropriate action to assure the ponds do not spill. <br /> We encourage Beaver Chemical Company to move forward in an expeditious manner <br /> to complete construction of the proposed treatment facility in compliance with <br /> the time schedule listed in our letter of 6 June 1978 to Mr. Robert H. Merk, <br /> Vice President, Beaver Chemical Company, Inc. <br /> If you have any questions, please contact Sterling Davis of our staff. <br /> Sincerely, <br /> RICHARD P. ROSE <br /> Senior Engineer <br /> Delta Watershed <br /> SPD:icc <br /> cc: Legal Division, SWRCB <br /> Dept. of Fish & Game, Region 2 <br /> San Joaquin Local Health District ' <br /> Robert H. Merk, Beaver Chemical Co. , Inc. <br />