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propriate. In order to speed the application process, the per- mittee agreed to drop its request for use of a biocide, choosing instead to treat the injectate with chlorine. The public notice and fact sheet were issued with this understanding. Subsequent to the public notice, the permittee again indicated to the Agency that a biocide was desirable. The Agency feels that use of a biocide in the injectate is a matter of interest to the public and should have been subject to public comment. Since the renewed request for a biocide was brought to this Agency too late for inclusion in the public notice and fact sheet, the Agency is denying this request. This denial is based on lack of opportunity for public com- ment only. The Agency is not ruling on the suitability of the biocide for this purpose at this time. Thus, the permittee may file a request for modification of the permit, if it is deter- mined that chlorine treatment is unsuitable and a biocide is necessary. Such a permit modification would be open to public comment. COMMENT: Section A2 on page 10 contains certain language imply- ing that injection into an underground source of drinking water is not permitted. This is an error. RESPONSE: The permittee is correct, language from the Class I permit was inadvertently included here. It has been removed in the final permit. COMMENT: On page 10, Section A3 , there is a reference to 4 1/2 inch tubing. Current plans call for 5 1/2 inch tubing at that location. RESPONSE : The final permit has been altered to reflect this change. COMMENT: The permittee has requested an increase in maximum in- jection pressure from 810 psi to 855 psi, based on results of a field leakoff test. RESPONSE: EPA has decided to deny this request. Inspection of the submitted leakoff test data indicates that very few actual measurements occurred in the range of 700-900 psi. Determination of the 855 psi level was apparently done by visual interpolation of this sparse data set. In the absence of a more definitive field measurement, EPA prefers to remain with the 810 psi value, which is based on assumed fracture gradients. This smaller value should not significantly affect the efficiency of the injection process. COMMENT: The requirement for a maximum injection rate is un- necessary.