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STATE OF"CALIFORNIA GEORGE DEUKMEJIAN,Govemor CAl LIF IA REGIONAL WATER QUALITYCONTROL - L VALLEY REGION = P 3201 S STREET SACRAMENTO,CALIFORNIA 95816-7090 PHONE: (916}445-0270 Crow NOV 51986 ENVIROMENTAL HEALTH FERMIT/sERVICES 4 November 1986- Mr. 986Mr. Tom Horton Department of Solid Waste Management - - San Joaquin County P.O. Box 1810 Stockton, CA 95201 REPORT OF WASTE DISCHARGE, CALDERON REQUIREMENTS Waste discharge requirements (WDRs) for the Harney Lane landfill were adopted by the Regional Board in 1978. With the institution of your closure plan and other requirements of California Administrative Code, Title 23, Chapter 3, Subchapter 15, these WDRs no longer adequately describe site operation and must be updated. Enclosed is a Report of Waste Discharge (RWD) form and fee schedule. After receipt of the completed RWD, we will update Harney Lane's WDRs to include the closure plan and propose them for adoption at a future Regional Board meeting. -As mentioned in my letter of 12 September 1986, the Harney Lane landfill will eventually have to comply (by 1 April 1989) with the vadoze zone monitoring requirements of the Calderon legislation. A waiver of Calderon's Solid Waste Assessment Testing (SWAT) requirements can be obtained only if the site is leaking hazardous waste. An exemption from the vadose zone monitoring requirement is possible if it can be established that no vadose zone exists below the site (i .e. , very shallow ground water) or if it is functionally impossible to sample the soil pore liquid. It does not appear that Harney Lane will qualify for a waiver or an exemption. It is argued, in your ground water monitoring program, that vadose zone monitoring is excessively costly and ineffective. We cannot waive the vadose zone monitoring requirement on this basis. Other landfills in your area that are planning vadose zone monitoring include Buena Vista in Amador County, I .T. Montezuma in Solano County, and Austin Road in San Joaquin County. In preparing your SWAT proposal you may wish to consult with the operators of these landfills. Many of the items required in a SWAT proposal have already been addressed in your approved closure plan. It shouldn't take much work to shape the closure plan into an acceptable SWAT proposal .