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CENTRAL VALL EGIONAL WATER QUALIT `S'RNTROL BOARD 1NSPECT10NsRER0RT F DATE: 24 August 2000 FACILITY: Austin Road Landfill DISCHARGER: City of Stockton LOCATION &COUNTY: Austin Rd. Stockton, San Joaquin County CONTACT(S): Mike Miller and Butch Stefani INSPECTION DATE: 23 August 2000 INSPECTED BY: Ross Atkinson ACCOMPANIED BY: Butch Stefani and Curt Fujii SUMMARY: Leachate seeps, erosion scars and some pond areas have been filled. Remaining work includes: install new down drains, fill remaining low area on the top deck, grade top deck so that water drains to drainage inlets, and install rip-rap to selected areas of Littlejohns Creek. BACKGROUND: The facility is temporally closed and has not taken waste since fall of 1999 pending the ongoing transfer of ownership to Forward Inc. The site has a history of wet weather problems including: discharge of leachate, development of low areas on the top deck that collect and pond rainwater, failure of side slope drainage structures with related erosion of interim cover on the side slopes, and encroachment of Littlejohn Creek on the south margin of the landfill. OBSERVATIONS AND COMMENTS: Much of the damage from last seasons rains have been repaired. As noted below, some outstanding items need to be completed before the start of the next rainy season. LEACHATE SEEPS: The leachate seeps that developed during the last wet season on the north, south and west side slopes have been repaired. The repairs appear to be adequate and cover vegetation is bein re-established. SIDE SLOPE DOWN DRAINS: Many of the side slope down drains were washed out by heavy rains last season with resulting local erosion of the side slope cover. All the down drains will be replaced with larger diameter pipe and the inlet areas re-graded. Areas of significant erosion to the cover have been repaired; some areas of shallow rilling of the cover remain and need to be repaired. MAINTAINCE OF TOP DECK: The two large ponds that developed on south side of the top deck have been filled and vegetation established. The large depression developed in the gas extraction area on the north side of the deck will be filled and graded when the gas extraction piping has been temporally removed. Some grading of the top deck will be necessary to move water to down drain inlets. LITTLE JOHNS CREEK: Last season erosion in the bed of Littlejohns Creek undercut parts of the south access road and if unchecked threatens to undercut the landfill with resulting release of waste. Riprap needs to be installed in selected areas to the stream to protect the banks from further erosion. Repairs to Approved: