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ATTACHMENT 16 <br /> INJECTION WELL DISCUSSION <br /> Injection Well Discussion <br /> As shown on the enclosed water balance diagram, process <br /> wastewater from the project will be disposed of in an <br /> injection well . <br /> The use of the injection well will have two positive <br /> environmental effects. First , the Sharpe Army Depot <br /> remediation water will not be disposed of in the French Camp <br /> Slough. <br /> Second, the use of the injection well will eliminate <br /> additional degradation of the ground water aquifer. <br /> The Project will use a Class I waste injection well . This <br /> well falls under U. S. EPA jurisdiction. A permit <br /> application has been submitted. The well will be drilled to <br /> about 5000 feet allowing the use of both the Blewett and <br /> Azevedo sands. The TDS of these formations is approximately <br /> 10,000 ppm. This is approximately 2,000 ppm higher- than the <br /> proposed waste water. Subsurface geology indicates a 25% to <br /> 30% porosity. The :injected fluids are not expected to <br /> migrate more than 1 /4 mile. In addition , safety measures <br /> will be implemented to prevent the waste stream from entering <br /> strata other than the target strata. All discharges into the <br /> injection well will comply with the discharge permits <br /> obtained from the EPA, the California Regional Water Quality <br /> Control Board , and the San Joaquin Local Health District. <br /> Please refer to the permit study and application supplied by <br /> Wilson Zublin Inc. , a copy of which is enclosed. <br />