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Comment: <br /> "It appears that this water is too salty to put into the <br /> river, and that there is too much and that it is too salty <br /> to treat in the Regional Sewage Treatment Plant. New dis- <br /> charges into the River are limited to 500 ppm TDS. This <br /> will be up to 216, 000 gallons per day of salty water, con- <br /> taining 7, 000 to 10, 000 ppm TDS that will be injected into a <br /> deep, underground aquifer. This deep aquifer will not be <br /> very useful in the future, even if the salt stays right <br /> there. " <br /> Response: <br /> Injection will take place into an aquifer containing more <br /> than 10, 000 ppm TDS and thus is not considered a USDW <br /> (present or future source of drinking water, 40 CFR §144 . 3) . <br /> Comment: <br /> "The initial source of this water will be ' remediation' <br /> water from Sharpe Army Depot from a depth of 100 to 300 <br /> feet. This is water from which the hazardous waste, TCE, <br /> has been air stripped, until it is reduced to a 'Non- <br /> detectable' level . But we know that things do not always <br /> happen as they should, bottled water shows up with Benzene, <br /> raw sewage is pumped into the sea following an earthquake, <br /> oil tankers spring leaks. " <br /> Response: <br /> As part of the Superfund site remediation requirements, <br /> Sharpe Army Depot will perform frequent testing of their <br /> water prior to delivery to San Joaquin CoGen, Inc. to ensure <br /> proper removal of TCE. <br /> For added safety, the UIC permit for San Joaquin CoGen, Inc. <br /> also requires that CoGen conduct monthly tests on the incom- <br /> ing water from Sharpe Army Depot. If the concentration of <br /> any constituent exceeds allowable levels, the EPA will <br /> evaluate this information and take appropriate follow-up ac- <br /> tion. <br /> 5 <br />