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6 <br />slightly lower. The pH of the C pit area backfill water and the Cottonwood Spring <br />are close to neutral with the Colt Seep water on the acid side of neutral, while the <br />remainder of the C pit backfill water is slightly on the alkaline side of neutral. <br />Well GF5 also contains high SAR values for the backfill aquifer, which <br />naturally exists in the ground water in this area. The SAR values of water from the <br />Colt Seep and Cottonwood Spring are less than one, indicating in these areas of the <br />backfill aquifer, SAR will not be a problem. <br />Ir <br />• <br /> <br />4-233 ee REVISED FEB 13 '87