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C STAFF REPORT (1 ) FORWARD, INC. , CLASS II-1 DISPOSAL SITE SAN JOAQUIN COUNTY Forward, Inc. , operates a Class II-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 emiconfined major ground water supplies, used for domestic and agricultural purposes, lie below 178 feet. Discontinuous zones of perched ground water are reported at depths of 55 and 60 feet. Land within 1000 feet of the site is used for agriculture. The site began operation in January .1978. Only the northeast corner of the site is currently developed for waste disposal . Existing operations consist of a Group 2 landfill area, a series of five solar evaporation ponds, and four Group 1 disposal trenches (see Attachment 2). Over 95% of the Group l solid waste disposed of to date has been residue from barium and strontium processing at FMC, Modesto which Forward began accepting in May 1978. Trenches 1 , 2, and 3 are currently full . Construction of Trench 4 is almost complete. Trench 4 will have full side wall liners as well as floor liners and a leachate collec- tion system. The ponds have received drilling muds and brines and leachate from the trenches for evaporation volume reduction since April 1980. The ponds are constructed with a compacted clay liner. The Forward, Inc. landfill is presently governed by Board Order No. 73-183, adopted on 23 March 1973' (see Attachment 3). Forward's waste discharge require- ments 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" In March 1983, staff developed a set of Interim.Discharge Specifications to allow the site operator to make these determinations in a consistent manner. Monitoring is required, under Order No. 73-183, for all hazardous constituents disposed of at the Forward site. The program consists of monitoring ground water, disposal trench leachate, and the quantity and location of Group 1 and Group 2 solid wastes disposed of at the site. The current ground water monitoring system has not detected a water quality problem; however, in an effort to upgrade the system to obtain better informa- tion and to meet more stringent state and federal regulations, the Board, in December 1982, adopted a revised monitoring and reporting program for this site. Many of the recent monitoring program revisions .have been implemented by Forward with the exception of the installation of the additional ground water monitoring wells. Forward is presently installing five monitoring wells. (1 ) This staff report condenses portions of and is supplemental to the staff report distributed to Board members under cover letter to Mr. Jose L. Alva, Chairman, San Joaquin County Board of Supervisors, 25 March 1983.