1983-06-03_REVISION - M1977285 (2)

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43.90(f)(1)(ii)(f) r (f) current and future uses of surface waters in the area and any water quality standards established for those surface waters; • (p) existing quality of surface water, including potential impacts from other sources of conta<aination; (h) potential for human health risks; (i) potential damage to wildlife, crops, vegetation, and physical structures; and (j) persistence of the potential adverse effects. (2) In making any determinations under 43.90(f)(1) and (4) about the use of groundwater in the area around the facility, the Agency will consider any identification of underground sources of drinking water and exempted aquifers made by the Enviromnental Protection Agency and the Texas Water Commission. (3) At the point of compliance, the concentration of a hazardous constituent shall not exceed: (i) the Agency approved background concentration in the ground- water of the constituents Listed in 10 CFR 40, Appendix A, Criterion 13; (ii) the respective value given in Appendix 43-A if the constit- • uent is listed in the table and if the background level of the constituent is below the value listed; or (iii) an alternate concentration limit established by the Agency. (4) Alternate concentration limits to background concentration or to the drinking water limits in Appendix 43-A that present no significant hazard may be proposed by licensees for Agency consideration. Licensees shall provide the basis for any proposed limits including consideration of practicable corrective actions, evidence that limits are as low as reasonably achiev- able, and information on the factors the Agency must consider. The Agency will establish a site-specific alternate concentration limit for a hazardous constituent, as provided in 43.90(f)(3), if it finds that the proposed limit is as law as reasonably achiev- able, after considering practicable corrective actions, and that the constituent will not pose a substantial present or potential hazard to human health or the environment as long as the alter- nate concentration limit is not exceeded. In making the present and potential hazard finding, the Agency will consider the factors listed in 43.90(f)Cl)(i) and (ii). • 43 - 20 (April 1990)