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ATTACHMENT K:INJECTION PROCEDURES <br /> Slough WPCF industrial system. None of these wastes are injected,and neither are cleaning <br /> wastes from the Closed Cooling Water System. <br /> LEC-1 <br /> Circulating water system blowdown will consist of the tertiary-treated makeup water from <br /> the WPCF and other recovered process wastewater streams from the LEC that have been <br /> concentrated by evaporative losses in the cooling tower, along with the chemicals added to <br /> the circulating water. The cooling tower concentrates these streams near the mineral <br /> solubility limit for the constituents of concern(calcium,silica, and TDS). This concentrated <br /> water must then be removed from the cooling tower via blowdown to prevent the formation <br /> of mineral scale in heat transfer equipment. The chemicals added to the circulating water <br /> control scaling and biofouling of the cooling tower and control corrosion of the circulating <br /> water piping and intercooler. Cooling tower blowdown will be directed to an onsite Class I <br /> UIW. <br /> LEC-2 <br /> Waste stream characteristics of the LEC-2 well will depend on which plant well is being <br /> backed up. <br /> K4 SAC/371322/082390003(ATTACHMENT-K.DOC) <br />