Environmental protection agency New E.P.A. radiation standards could restrict nuclear power. Post N 1, 1973 p.14 E.P.A. plan to cut pollution opposed by Denver Urban Renewal Authority. Post D 4, 1973 p.3 RMN D 4, 1973 p.12 E.P.A.'s standards on radiation dangers rejected; A.E.C. to set standards; radiation fatalities predicted. Post Mr 3, 1974 p.41 E.P.A. OK's expansion plan for sewage district, Denver metro area. Post Ap 19, 1974 p.3