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STAFF REPORT FORWARD, I`NC. CLASS II-1 DISPOSAL SITE SAN JOAQUIN COUNTY Facility Settina Forward, Inc. operates a Class 11-1 waste disposal facility on Austin Road, seven miles southeast of Stockton (see Attachment 1 ) . The South Fork, of Littlejohns Creek traverses the southern portion of the 157 acre site. Semi- confined major ground water supplies, used for domestic and agricultural purposes , lie below 178 feet. Discontinuous zones of perched ground water are reported between depths of 55 and 60 feet. Land within 1 ,000 feet of the site is used for agriculture. Only the northeast corner of the site is currently developed for waste dis- posal . Existing operations consist of a Group 2 landfill area, a series of five solar evaporation ponds, and four Group I disposal trenches (see Attach- ment 2) . Over 95% of the Group I solid k,,laste disposed of to date has been residue from barium and strontium processing at FMC, Modesto. Other Group I solids disposed of in Trenches 1 , 2 and 3 include contaminated earth materials from site and spill cleanup operations. Trenches I and 2 are full and capped and Trench 3 is over 80% full . Construction of Trench 4 is not yet complete. The trenches have floor liners and leachate collection systems. To date, the ponds have received drilling muds and brines and leachate from the trenches for evaporative volume reduction. In response to tightening regulatory controls , including Governor Brown's executive order to phase out land disposal of certain hazardous wastes, Forward has proposed to shift their emphasis in future operations from disposal to resource recovery and waste treatment. Reusable materials will be recovered from, Group 1 wastes and residues will be treated or disposed of in an environ- mentally sound manner. Interim Discharge Specifications Forward's waste discharge requirements permit the disposal of Group 2, Group 3, and certain borderline Group 1 wastes including pesticide container wash water and other "selected materials approved by the Executive Officer. " Requirements wording resulted in frequent requests of staff for determinations of whether wastes may be accepted for disposal at the site. Staff has recently developed a set of Interim Discharge Specifications to allow the site operator to make these determinations in a consistent manner (see Attachment 3) . The Specifications define acceptable "borderline" Group 1 wastes by limiting the concentrations of hazardous constituents container] in the wastes. Also included in the Interim Specifications are operational criteria to protect site integrity, to prevent the formation of leachate, and to alert staff when