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INFORMATION SHEET <br /> ORDER NO. 5-01-114 <br /> PILKINGTON NORTH AMERICA GLASS FURNACE FACILITY <br /> SAN JOAQUIN COUNTY <br /> Pilkington North America operates a float glass furnace facility at 500 E. Louise Avenue,Lathrop, San <br /> Joaquin County. The facility stockpiles raw material, manufactures glass products, and warehouses <br /> products prior to shipment. The facility has been regulated under an NPDES permit,but hasn't <br /> discharged wastewater to surface water since the early 1990's. In February 2001, Pilkington submitted <br /> a Report of Waste Discharge for land discharge only. The facility does not currently meter its <br /> wastewater flow rate. Wastewater flow rate is estimated based on pump run time meters. The <br /> Discharger estimates the flow rate to be approximately 784,000 gallons per day. Wastewater is <br /> generated from groundwater infiltration, float glass manufacturing, tempered and laminated glass <br /> manufacturing, cooling tower and boiler blowdown,reverse osmosis reject water(collectively process <br /> water) and domestic wastewater. Domestic wastewater is disinfected prior to commingling with the <br /> process water and discharge to a concrete lined pond followed by land application. <br /> Depth to the first water bearing zone is approximately 11 feet. A hardpan exists approximately four <br /> feet below the surface which limits the infiltration rate of wastewater. The facility water supply is <br /> provided by three wells located approximately one mile from the facility location. Groundwater in the <br /> facility area has been degraded by a 1,2-dibromo-3-chloropropane (DBCP)plume emanating from the <br /> J.R. Simplot property to the southeast, a former manufacturer of DBCP. Additional groundwater <br /> contaminants typical of fertilizers (nitrogen and salts)have been identified at the J.R. Simplot site <br /> located southeast of the facility. Shallow groundwater also contains elevated total dissolved solids <br /> concentrations (3,735 mg/1 and 4,720 mg/1). <br /> Three groundwater monitoring wells were installed to investigate a petroleum fuel spill at the site. <br /> Several other wells exist at the facility; the wells consist of extraction and monitoring wells associated <br /> with the DBCP cleanup and agricultural or process supply wells have also been observed on the <br /> property. Under these Waste Discharge Requirements process water, pond, and groundwater <br /> monitoring will be required. The WDRs also require that monitoring wells be installed in the land <br /> application areas and that the land application areas are improved to evenly distribute and control <br /> wastewater on the land application areas. <br /> TRO: 5/11/2001 <br /> C WyWcuni=%Wie ellwa sXWyAsVWwWk Nlptloc <br />