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~ NPDES PERMITS EXPLANATION CODES COLORADO RIVER BASIN SALINITY CONTROL FORUM NPOES permit. are reviewed under two different criterium under Forum policy; the.. being municipal and industrial. In order tor a permittee to be in compliance under the .un lei pal criterium. the increase in concentration betweeD inflow and outflow can not be greater than 400 -VII. Forum industrial criterium requires that no indu.trial uaer diacharge. ItOre than 1.00 tona/day. Under ForUII policy there can be granted exception. to these limitation. by the States. The following gives an explanation of the current' . status of the NPDES permits. Becau.. at any given time many of the approximate 600 permits identified in this list are being reviewed. rei..ued. and/or terminated. and new discharge permit. are being tiled. this list must be considered as being subject to frequent change. o CJl W N MUNICIPAL (M) Municipal user in compliance with Forum policy. (M-l) Permi t has expired or been revoked. discharge. No (M-2) Permittee i. not currently discharging. (M-3) Measurement of TDS is not currently required. but the state plans to require measurements of both inflow and outflow when the permit is reissued. (M-4) Measurements of inflow are not consistent wi th Forum policy: (M-4A) Therefore. it i. not known whether or not this municipal user is in compliance. (M-4B) However. since outflow concentration is leas than 500 mg/l it is presumed that this permit is not in violation of the <400 mg/l increase. (M~SI This permit is in violation of Forum policy 1n that there is an increase in concentration by >400 mg/l over the source waters. (M-5Al The state is currently working to bring them into compliance. (M-6l This permit and they increase in supervision of EPA ppm incremental is under the report <400 TDS. (M-71 Insufficient data to know the status of this permit. * Permi t issued to a federal agency or an Indian tribe and the responsibility of EPA. INDUSTRIAL (1) Industrial user in compliance with Forum policy. (I-i) Permit has expired or been revoked. discharge. No (I-2) Permittee i. not currently discharging. (I-3) Measure.ent of TDS is not currently required. but the state plans to require measure.ents of both volume and concentration of outflow when the permit is reissued. (1-4) Either concentration or volume of outflow are not currently being made as stipulated. thus the permit i. in viol.ation of Forum policy. It is not know if the permit is in excess of the <1.00 tons/day requirement. (I-S) This pe~t is in violation of Forum policy in that they are discharging >1.00 tons/day of salts. (I-SA) No provision has been made allowing this violation of Forum policy. (I-58) Thougb discharge is >1.00 tons/day. in keeping with Forum policy the discharger has demonstrated the sal.t reduction is not practicabl.e and the requirement has been vaived. (I-5Cl This permit uses waters for their theraal energy. Only heat is extracted and thus the sal.t and water which are discharged into the river would have done so natural.l.y. They are covered by the Forums pol.icy on intercepted groundwater.. (I-50) This permit is for a fish hatchery and al.though they are discharging >1.00 tons/day. the use of the water 1s a one- time pass through use and not >1.00 tons/day of salt 1s added by the use. (I-5E) This permit is for the interception and passage of ground waters and thus is excepted under the Forum's policy on ground-water interception. (1-6) This pe~t is under the supervision and they report a discharge of tons/day of salt. of EPA <1.00 (1-7) Insufficient data to know the current status of this permit. -