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INFORMATION SHEET ORDER NO. R5-2004-0018 REVISED WASTE DISCHARGE REQUIREMENTS M&L COMMODITIES, FORMERLY SOUTHWEST HIDE COMPANY SOUTHWEST HIDE WASTE WATER PONDS SAN JOAQUIN, COUNTY M&L Commodities, formerly Southwest Hide Company owns the Southwest Hide site, a former hide processing facility. This facility was located at 11651 Palm Land, Manteca San Joaquin County. Southwest Hide facility discharged a maximum of 275,000 gallons of brine wastes annually into two surface impoundments. The brine waste has previously been classified as designated liquid waste. The surface impoundments were lined but the construction standards did not comply with current regulatory standards for Class H waste management units The hide processing facility and likely previous operations at this site contaminated underlying soils and groundwater with elevated concentrations of chloride and TDS. The hide processing facility ceased operations in 1992; and in 1993 the ponds were emptied and residual wastes, liner materials, and contaminated soils were discharged to an appropriate off-site facility. The remaining berms contained salt contaminated soils and underlying groundwater also contained elevated salt concentrations. In 1998 the discharger submitted a Remedial Investigation/Feasibility Study(RDFS) to cleanup degraded soil and groundwater. The remedial action involved removal of remaining contaminated soils, grading and paving the pond area. The Discharger has removed the contaminated soils and discharged them at an appropriate facility; and graded and compacted the pond area. In the spring of 2004 the Discharger will pave the pond area with asphalt paving. These proposed Waste Discharge Requirements require post- closure maintenance of the paved area, continued monitoring of groundwater and establish conditions that will trigger active remediation of groundwater if water quality continues to degrade.