SITE INFORMATION AND CORRESPONDENCE

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WASTE DISCHARGE REQUIREMENTS ORDER NO. • MUSCO FAMILY OLIVE COMPANY AND THE STUDLEY COMPANY 8 WASTEWATER TREATMENT FACILITY SAN JOAQUIN COUNTY control report, evaluate the adequacy of monitoring well MW-9, and perform and submit the results of an additional groundwater monitoring event. 39. As a result of the enforcement actions, the Discharger has designed a 114-million gallon storage pond and improvements to the land application areas. The improvements include planting crops on the land application areas, mechanical equipment to improve distribution of wastewater on the land application areas, construction of tailwater collection ditches, and sumps equipped with pumps to return collected tailwater to either the 1-million gallon settling pond or the 114-million gallon storage pond. The improvements were designed to prevent wastewater from entering the surface water drainage course that flows though the land application areas and the facility. GROUNDWATER CONDITIONS 40. The Discharger constructed a groundwater production well in 1983. The well is approximately 607 feet deep with a sanitary seal from the surface to 50-feet below ground surface. Gravel pack exists from 50 to 607 feet below ground surface. Based on five sample events performed from 1982 to 1999, the water quality in the well is poor as summarized in the table below: Constituent Units Ranee Average EC mg/L 2,000—2,400 2,168 PH Std. 7.7-8.5 8.1 TDS mg/L 1,280— 1,971 1513 Sodium mg/L 228 -443 372 Chloride mg/L 189 - 514 334 41. Available groundwater quality for wells located within two miles of the site was presented in the RWD. The depth of the wells and screened intervals are variable, and the wells were sampled at various times between 1951 and 1979. The water quality data provides some information on the surrounding groundwater quality. The data is summarized below: Well ID Well Depth (ft) Sample Date TDS (mg/L) Sodium (mg/L) Chloride (mg/L) 02SO4E26DO1M NA 5/24/79 1,400 320 440 Cordes 290 3/21/63 NA NA 317 02SO4E27J02M 300 3/66-6/69 NA 3948 3528 02SO4E28A1 294 10/25/51 NA 390 250 0204E28A1-D 290 1/58-4/67 1,826 3848 2438 0204E28H1 NA 4/59-4/57 2,030 4328 2958 024E28P1 NA 7/16/59 NA NA 120 02SO4E33B01 NA 5/24/79 1,360 300 240 02SO4E33 NA 5/26/55 2,620 682 560 02SO4E33J1-D NA 8/57-4/67 2,470 5988 4858 02SO4E34H1 273 ' 4/59-4/67 NA 558 2568 02SO4E35D1 NA 8/31/51 NA 360 290 02SO4E35H1 NA 5/67-5/79 NA 4028 3338 Average - -- 1,915b 43 lb 32 lb V�)wy.e NrIN5ulprv.TM.mWpWRUx