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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ORDER NO. 135-2009-0049 WASTE DISCHARGE REQUIREMENTS FOR POSTCLOSURE MAINTENANCE AND CORRECTIVE ACTION SAN JOAQUIN COUNTY DEPARTMENT OF PUBLIC WORKS HARNEY LANE LANDFILL CLASS III LANDFILL SAN JOAQUIN COUNTY The California Regional Water Quality Control Board, Central Valley Region, (hereafter Regional Water Board) finds that: I The San Joaquin County Department of Public Works (hereafter referred to as "Discharger") owns and formerly operated the Harney Lane Landfill, a closed Class III landfill-.--T-he landfill-i_s-on--E-a"a-rne_y-Lane_near Nodh-Jack Tone-Road, approximately six miles east of Lodi, as shown in Attachment A, which is incorporated herein and made part of this Order. The landfill is on.a 127-acre site in the northeast 1/4 of Section 19, T3N, R8E, MDB&M, corresponding to Assessor Parcel Numbers 065-03-03, 065-03-06, 065-03-08, and 065-03-09. 2. These revised Waste Discharge Requirements (WDRs) include updated findings and requirements for landfill monitoring and corrective action in accordance with California Code of Regulations (CCR), title 27, division 2 (Title 27) regulations. Previous WDRs Order 96-139, which this Order replaces, were issued prior to adoption of Title 27, do not reflect postclosure monitoring results, and no longer adequately describe the facility. 3. The landfill operated from 1948 until November 1991, accepting primarily household wastes. The facility includes two landfill units (Landfills 1 and 2), including precipitation and drainage controls, landfill gas (LFG) controls, monitoring wells, access roads, and other facilities. Landfill I (LF-1), also referred to as the primary fill area, includes 97 acres of the eastern part of the site. Landfill 2 (LF-2), also referred to as the secondary fill area, includes 15 acres and is immediately southwest of Landfill 1. Both landfills were filled concurrently. The landfills are shown in Attachment B, which is incorporated herein and made part of this Order. 4. In 1994, both landfill units were closed (i.e., graded and clay capped) in accordance with land disposal regulations formerly in CCR, title 23, chapter 15, division 3 and now in Title 27 (see Findings 36 through 39). In 1996, an LFG extraction system was also installed at the site, as described in Finding 43 and shown in Attachment C, which is incorporated herein and made part of this Order. 5. Since-ck)su-re-of-ttieAandffltu-nft ;n__1.994, the-Dischar-g-e-r-has-been-pe-rfofn3ing-landfilI postclosure monitoring and maintenance in accordance with previous waste discharge requirements (Order Nos. 93-093 and 96-139).