WSP10860

• File Number: 8274.400
• Description: Colorado River Basin Salinity Control - General Basinwide Salinity Issues - NPDES
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 4/1/1992
• Title: Colorado River Salinity Standards Compliance at The La Plata Mine - NPDES Permit NM0029505 - New Mexico
• Water Supply Pro - Doc Type: Report/Study

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regulation of municipal and industrial sources. (See Section 402
of the Federal Water Pollution control Act.) This policy is
applicable to discharges that would have an impact, either direct
or indirect on the lower main stem of the Colorado River System,
The lower main stem is defined as that portion of the main river
from Hoover Dam to Imperial Dam,
I. Industrial Sources
The Salinity Standards state that "the objective for
discharges shall be a no-salt return policy whenever
practicable," This is the policy that shall be followed in
issuing NPDES discharge permits for all new industrial
sources, and upon the reissuance of permits for all existing
industrial sources, except as provided herein, The
following addresses those cases where nO-discharge of salt
may be deemed not to be practicable,
A. New Construction
1. New construction is defined as any facility from
which a discharge may occur, the construction of
which is commenced after October 18, 1975, (Date of
submittal of water quality standards as required by
40 CFR 120, December 11, 1974,) Appendix A provides
guidance on new construction determination.
(a) The permitting authority may permit the
discharge of salt upon a satisfactory
demonstration by the permittee that it is not
practicable to prevent the discharge of all
salt from proposed new construction,
(b) The demonstration by the applicant must include
information on the following factors relating
to the potential discharge:
(1) Description of the proposed new
construction.
(2) Description of the quantity and salinity
of the water supply,

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