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I CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ORDER NO. R5-2004-0018 REVISED WASTE DISCHARGE REQUIREMENTS For M&L COMMODITIES, FORMERLY SOUTHWEST HIDE COMPANY FOR CORRECTIVE ACTION AND POST-CLOSURE OF SOUTHWEST HIDE WASTEWATER PONDS SAN JOAQUIN COUNTY The California Regional Water Quality Control Board, Central Valley Region, (hereafter Board) finds: 1. M&L Commodities formerly Southwest Hide Company, (hereafter Discharger) owns the former Southwest Hide facility at 11651 Palm Lane, Manteca in San Joaquin County. Wastewater ponds at the former Southwest Hide facility have been clean closed and the site is undergoing redevelopment. 2. The Southwest Hide facility is a 28.45 acre property adjacent to the western side of Highway 99, at the east end of Palm Lane, two miles southeast of the City of Manteca in San Joaquin County. The Assessor's Parcel Number is 243-24-041. The facility location is shown on Attachment A, which is incorporated herein and made a part of this Order. 3. The site had several previous operations before Southwest Hide that may have contributed to the soil and groundwater degradation. The Roma Winery operated at the site from 1910 to 1938. The Schenley Distillery produced brandy and high proof alcohol at the site between 1938 and 1948. A second winery operated at the site from 1948 to 1959. A chicken farm operated on the site from 1961 to 1968. In 1972 a metal framing company leased the grounds and sublet it to a worm farmer and a steel company till 1976. From 1976 till 1978 an unrelated hide processing company occupied the site. No information exists concerning the disposal practices or amounts of waste produced by these previous operations. 4. From 1979 to 1992 Southwest Hide Company operated a hide processing facility at the site. 5. The Southwest Hide facility produced a maximum of 275,000 gallons of brine wastes annually from the hide curing process. The brine was discharged to two surface impoundments, shown on Attachment B, which is incorporated herein and made a part of this Order. The two surface impoundments were constructed in 1979 in compliance with regulations in affect at that time. The impoundments did not meet current regulatory standards. They were constructed with flexible membrane liners and had a total capacity of 1.55 million gallons.