Laserfiche WebLink
The work plan calls for the removal of contaminated soil and <br /> installation of two extraction wells to be used to pump the <br /> contaminated groundwater into temporary holding tanks for analysis <br /> and treatment. It is estimated that each extraction well will <br /> generate approximately 10 gallons/minute. Water samples were <br /> collected for each extraction well and the results of the water <br /> analysis are enclosed. In addition to the extraction wells, the <br /> construction contractor plans to install two dewatering wells just <br /> east of the contaminated area (see Figure 1) . Each dewatering well <br /> is expected to contribute an additional 15 gallons/minute through <br /> the treatment system. <br /> The treatment process will be designed to capture and treat the <br /> water from both the extraction and dewatering wells. The treatment <br /> system will consist of a series of sediment filter cartridges and <br /> two activated carbon treatment units (see Figure 2) . The water <br /> treatment system will remove hydraulic oil to nondetectable limits. <br /> LOF proposes to discharge the treated water into its permitted <br /> process wastewater system. LOF's process wastewater, sanitary <br /> wastewater effluent, and stormwater collect into a one million <br /> gallon concrete reservoir. LOF's discharge order allows for the <br /> discharge of the accumulated wastewater to land, river, and/or <br /> evaporation/percolation ponds. During the time that the <br /> contaminated groundwater is being treated, LOF will discharge only <br /> to land. LOF believes that land disposal is possible for the <br /> majority of the year. LOF may need to discharge to the river to <br /> prevent accumulation of standing water. If river discharge of <br /> treated water becomes necessary, LOF will notify the RWQCB prior to <br /> discharge. Discharge to the river will be curtailed when weather <br /> conditions allow LOF to discharge to land. LOF will comply with <br /> all conditions set forth in the facility's current discharge order <br /> pertaining to the discharge of wastewater to land or surface <br /> waters. <br /> The modernization project is a major commitment by LOF to the <br /> Lathrop facility and San Joaquin County. It is imperative that <br /> construction schedules be met in order for the facility to come <br /> back on line on April 1, 1994. Any significant delays will result <br /> in major financial hardships and lost production for LOF. <br /> Therefore, LOF is requesting approval from the RWQCB to begin <br /> contaminated groundwater remediation treatment and discharge to <br /> land through LOF's existing discharge order. LOF would like to <br /> begin discharging treated water on November 16, 1993 . <br /> LOF is committed to remediate the soil and groundwater as <br /> expeditiously as possible. Should you require additional <br />