CORRESPONDENCE_1959 - 1989 - Laserfiche WebLink

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S7,i;,E C,ONLIFORNIA GEORGE DEUKMEJIAN,Governor CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD— CENTRAL VALLEY REGION 3443 ROUTIER ROAD SACRAMENTO,CA 95827-3098 1989 Mr. Tom Horton MAR 2 1989 Department of Public Works County of San Joaquin ENVIRONMENTAL HEALTH Post Office Box 1810 PERMIT/SERVICES Stockton, CA 95201 CORRAL HOLLOW LANDFILL, SAN JOAQUIN COUNTY The City of Tracy would like to dispose of sludge wastes at Corral Hollow Landfill . However, the City is uncertain of what steps they need to take in order to comply with waste discharge requirements. Since the County is responsible for engineering at the landfill , the City' s request should have been directed to you. In order to expedite your response, we have the following comments: 1. Sludge which is a ' designated' or ' hazardous waste' may not be discharged to the landfill . Determination of whether the sludge is a 'designated waste ' depends on the location of disposal and the attenuation factor that could be applied to any leachate which could reach ground water. The attenuation factor would vary with the location of disposal . We are willing to assist the County in it' s determination of 'designated waste' levels for the pollutants contained in the sludge. 2. The moisture content of the sludge must not exceed 50%. 3. If the sludge is to be used in the foundation layer of the final cover, then the County must demonstrate that the bearing capacity of the foundation layer will still be adequate to support the overlying clay cap. Also, the closure plan must show how the sludge will be incorporated into the final cover. 4. If the sludge is to be used as a soil amendment, then it must be shown to UL, &I e a beneffit to she soils into 'which it is incorporated, We will need to see data concerning nutrient content of the sludge, and how those nutrients benefit the soils. 5. We understand that the City may request temporary storage of the sludge at the Corral Hollow Landfill . If temporary storage is requested, this may be approved under the following conditions: a. The sludge must contain less than 50% moisture. b. There is no significant threat to surface and ground water. C. A definite time period for the temporary storage is specified. d. The sludge is not stored closer than 100 feet from any surface waters or drinking water wells. e. The sludge must not be comingled with other wastes. f. The sludge must be protected from rainfall/runoff.