COMPLIANCE INFO_1987-1989 - Laserfiche WebLink

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Ron Valinoti, Director Page 3 of 5 The RDSI of November 1988 and an amendment to the RDSI dated March 1990, state that the Austin Road Landfill will accept 5,000 cubic yards per year of non-hazardous sewage sludge from the Stockton Wastewater Treatment Plant. It is further stated that this sludge, which has been dried to more than 50% solids, will be placed in the foundation layer of the final cover. The WDR Order No. 90-122, Section 15, states that 20,000 cubic yards of digested sewage sludge has been accepted on a one time basis and that an additional 5,000 cubic yards of this sludge will be accepted annually. It is further noted that the sludge is being stockpiled at the landfill and that this sludge may be used in the foundation layer of the final cover . Under part B, Discharge Specifications, Section 15 states that sludge which is incorporated into the foundation layer shall be tested to determine if it has appropriate engineering properties to support the overlying clay liner, soil cover, and other potential loads. The Monitoring and Reporting Program Order No. 90-122 requires the discharger to submit a report to the RWQCB on a quarterly basis detailing the monitoring results and the suitability of the sludge for use in the foundation layer . Unlined storage of sludge, even at >50% solids, creates the possibility of further degradation of groundwater . To be in compliance with 23 CCR 2523(c)- Nonhazardous Solid Waste, dewatered sewage or water treatment sludge may be discharged at a Class III landfill if the landfill is equipped with a Leachate Collection and Removal System (LCRS) . Furthermore, sludge is a putrescible waste and as such must be disposed of properly. Proper disposal means being covered and meeting adequate drainage and erosion control measures. The State Inspector did not observe the storage of sludge occurring in an impoundment area with containment structures capable of preventing degradation of waters of the state. In light of groundwater contamination at Austin Road Landfill, Board staff urge that the acceptance and storage of sludge be stopped until a LCRS is installed and the SWFP is revised to address this practice. Staff also recommend that the discharger be requested to conduct a study to determine the long term, net impact on water quality resulting from the storage of sludge on site. This study should address the introduction of liquids which may further increase leachate production leading to further degradation of groundwater quality. 14 CCR 17710- Grading of Fill Surfaces This violation was addressed in the inspection reports (9/19/90 & 10/26/90) from Mr . Wickes, LEA. The response is acceptable.