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,.... o N ~ lEGEND NPDES PERMITS EXPLANATION CODES COLORADO RIVER BASIN SALINITY CONTROL FORUM NPDES permitS are reviewed under two different criterium under Forum policy; these being municipal anli industrial. In order for a permittee ito be in compliance under the municipal criterium, the increase in concentration between ,inflow and outflow can not be greater than 400 mg/L Forum industrial criterium requires that no industrial user discl1arges morethan' 1.00 ton/day. Under Forum "policy there can be granted exceptions to these limitations by the states. The following gives an explanation of the currdnt status of the NPDES permits_ Because at any given time many of the approximate 600 permits identified in this list are ~eing reviewed, reissued, and/or terminated, and new discharge permits are being filed, this list must be considered as being $ubject to frequent change. MUNICIPAL (MI Municipal user in compliance with Forum policy_ (M-l) Permit has expi~ed or been revoked. No discharge. (M-2) Permittee is not currently discharging. (M-3) Measurement of; TDS is not currently required, but the state and/or ~PAplans to require measurements of both inflow 'and outflow when the permit is reissued. IM-41 Measurements Of inflow are not consistent with Forum policy; , (M-4AI Therefore, it is ;not known whether or not this municipal user is'in compliance. However, since Outflow concentration is less than 500 mg/l it is presumed that this permit is not in violation of the <: 400 mglL increase. (M-5) This permit is in ,violation of Forum pOlicy in that there is an increaSe in'concentration of >400 mg/l over the source Waters. (M-4BI (M-5A) The state is curr$ntly working to bring them into compliance. (M-61 This permit is under the supervision of EPA and they report <400ppm incremental increase in TDS. Insufficient data to know the status of this permit. (M-7) . Permit issued to a federal agency or an Indian tribe and the responsibility of EPA. i ,Jf..'-, (IJ (1-11 (1-2) (1-31 (1-4) INDUSTRIAL Industrial user in compliance with Forum.policy. Permit has expired or been revoked. No discharge. Permittee is not currently discharging. Measurement of TDS is not currently required, but the state and/or EPA plans to require measurements of both volume and concentration of outflow when the permit is reissued. Either concentration or volume of outflow are not currently being made as stipulated, thus tbe permit is in violation of Forum policy. It is not 'known if the permit is in excess of the < 1.00' ton/day requirement. This permit is in violation of Forum policy in that they are discharging > 1,00 ton/day of salts. (I-SA) No provision has been made allowing this violation of Forum policy. (1-5) (I-5B) Though discharge is> 1.00ton/day, in keel!ing with Forum policy the discharger has demonstr~ted the salt reduction is not practicable and the requlrement has been waived. (I-5C) The use of water under this permit is fo(thermal energy. Only heat is extracted and thus the salt and water which are discharged into the river would have done so naturally. They are covered by the Forum's policy on intercepted ground wate..s. (I-50) This permit is for a fish hatchery. The use of the water is a one-time pass through, and . < 1,00 ton/day of salt is being discharged. (I-5E) This permit is for the interception and pas$age Of ground waters and thus is excepted uni/er the Forum's pOlicy on ground-water interception, (1-6) This permit is under the superviSion of EPA and they report a discharge of < 1.00 ton/day Of salt. (1-7) C-l Insufficient data to know the current status. of this permit. j i i4i;i.