SU0004113 - Laserfiche WebLink

Home Browse Search

INFORMATION SHEET ORDER NO. R5-2002-0072 GEORGE REED, INC. AND 711 MATERIALS, INC. AGGREGATE MINE AND WASTEWATER SYSTEM SAN JOAQUIN COUNTY George Reed, Inc. owns and operates the aggregate processing facility at 17300 E. Jahunt Road, Clements, San Joaquin County. George Reed processes earth materials excavated in the nearby area. Presently, the excavations are located south of the Mokelumne River. A gold dredge mined the area in the 1930's. Excavation of earth materials has occurred since at least 1956. George Reed, Inc. has owned the facility since 1993. George Reed, hie. also operates an asphaltic concrete batch plant at the site. 711 Materials, Inc. operates a concrete batch plant. George Reed, Inc. expects to produce approximately 500,000 tons of aggregate per year. Excavated materials are washed to remove fine grained soil particles. Approximately 475,000 gallons of aggregate washing wastewater is generated on a daily basis. Aggregate washing water comes from a groundwater well located at the aggregate plant. Most of the water is recycled for uses such as dust control,not for aggregate washing. The wastewater is discharged to settling ponds that are not protected from a 100-year flood. George Reed, Inc. has proposed a plan to install mechanical separation equipment and construction of primary settling ponds or a mechanical treatment system that would eliminate wastewater settling ponds. If the primary settling ponds are constructed,effluent from the settling ponds is required to have a lower sediment load then floodwaters in the Mokelumne River. As part of the wastewater system improvements, George Reed, Inc. is proposing to discharge wastewater into an existing pond(called Pond A). To allow construction of the mechanical settling equipment and primary settling ponds, wastewater would be discharged into Pond A would be without treatment. The Order requires the mechanical equipment and primary settling ponds to be constructed and in operation by December 2002. This Order requires evaluation of Pond A to determine if additional permits from other governmental organizations are required prior to initiating the discharge. Groundwater occurs approximately 15-20 feet below the ground surface depending on surface elevation and proximity to the Mokelumne River. No groundwater monitoring wells exist on the property, although there are two industrial process supply wells. This Order does not require groundwater monitoring because chemicals are not added to the wastewater and because of the low likelihood of the discharge impacting groundwater quality. This Order does require evaluation of the concrete batch plant containment structure and an analysis to determine if soluble metals (especially hexavalent chromium) exist in concentrations that would result in classification of the wastewater as designated waste. The surrounding land uses are industrial and agricultural. TRO: 4/26/02 c ti+r o�mmw,d.!aarimw w.aw