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CALIFORNIA REGIONAL ATER QUALITY•CONTROL BOARD <br /> CENTR-,! VALLEY REGION <br /> 3443 Rondec Road, _sz.A, mfornia 9582 7, <br /> PUBLIC HEARING <br /> concerning <br /> Consideration of Adopcn of Waste Discharge Requirements <br /> (National Pollutant Dscharge EIimination System Permit) <br /> for <br /> iVL-kRLEY COOLING TOWER COVIPAiN'Y <br /> GROUNDWATER EXTRACTION AND TREATMENT SYSTEM <br /> SA.NNJOAQUIPi COUNTY <br /> The Marley Cooling Tower Company(MC C) owns and operates a former cooling tower fabrication <br /> plant in the East Stockton Area in San Joac�V.-i County, As part of the fabrication operations,MCTC <br /> operated a wood preservation process utiI17 g solutions containing copper, chromium and arsenic. <br /> Wood preserving was discontinued at this s. l tv in January 1991, however past operational practices <br /> have resulted in contamination c:a-ound-.,_:__underlying the sit--. In an ongoing effort to remedy <br /> groundwater contamination,MCTC operates a groundwater extraction and treatment system, and <br /> discharges a maximum of 0.94 million galic_per day(mgd) of Created groundwater and storm water <br /> runoff to the Stockton Diverting Canal, a w a: of the United States and a tributary to the Calaveras <br /> River, at a location just south of Fremont SZ==t. Proposed effluent limitations have been established <br /> or retained in this Tentative Order for eopperHexavalent chromium, total chromium, arsenic, and <br /> chlorine residual. This Tentative Order inc'--'"es a new 500 milligram per Liter(mg/L, ppm) monthly <br /> average effluent limitation for TDS applied a_ :he point of discharge which is necessary to comply <br /> with the secondary California MCLS comai.ez' in Title 22, Califorua Code of Regulations (CCR) <br /> and incorporated as chemical constituent w L--: quality objectives in the Basin Plan. <br /> A formal public hearing to consider renews. .__the Discharger's \-PDES Permit No. CA0081787, <br /> .- <br /> was previously scheduled for 30 and 31 Jane.._ :2003, in Sacramento, California. The date of the <br /> hearing has been changed as follows. The he a considering this matter will now be held during <br /> the Regional Board meeting which is scheduled for: <br /> DATE: 13 and 14 March 200= <br /> TD/IE: 8:30 a.m. <br /> PLACE: Regional Water QuaL'-. Control Board <br /> 3443 Routier Road, Sir:=A <br /> Sacramento CA 93827 <br /> The designated parties for this hearing are as :c:tows: <br /> • Staff of Central Valley Regiona:3oard <br /> • Representatives of Marley Cec'g Tower Company <br /> • Representatives ofDeltakeepe: <br /> Only designated parties will have these rights: td,call and examine witnesses; to introduce exhibits; <br /> to cross examine opposing witnesses; to impeac-any witnesses; and to rebut the evidence against <br /> him or her. All other persons wishing to testi:Nqr provide comments are interested persons and not <br />