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TCEQ DRAFT STORM WATER PERMIT

CITY OF SAN ANTONIO

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·        Draft Date:  September 4, 2003

·        Publication Notice date:  within 45 calendar days of September 4^th

·        No numeric effluent limits "expressed" in the permit

·        Numeric limits effected by default regulation

 

CONCERN for Numeric Effluent Limits

 

·        Permit draft continues to be entitled "Waste Discharge Permit"

·        "Waste Discharge Permits" are governed in part by 30 TAC Chapter 319 (General Regulations Incorporated Into Permits), subchapter B, Hazardous Metals, Secs. 319.21-319.29

·        This provision may be thought of as a default numeric limits condition, imposed by operation of regulation, where no limits are mentioned in the permit.

·        30 TAC 319.28 requires: " Every waste discharge permit which does not currently specify effluent limitations for any of the hazardous metals covered by this subchapter is hereby amended to incorporate the terms of this subchapter.  In all waste discharge permits which the commission may issue, renew, or amend, the quality levels specified in this subchapter shall apply where the commission does not establish specific effluent limitations regarding a particular hazardous metal."

·        The San Antonio permit is likely to be a template for other Phase I renewals.

·        Reference to the City's permit is hereafter in the plural because its basic terms will likely be applicable to other municipal renewals.

 

IMPACT of permit language and 30 TAC 319.28

·        regulation provides default numeric limits for hazardous metals in all "waste" discharge permits

·        the following numeric limits will apply to inland and tidal waters, respectively:

 

Inland Waters
Metal	Not to Exceed Average	Not to Exceed Daily Composite	Not to Exceed Grab Sample
Arsenic	0.1	0.2	0.3
Barium	1.0	2.0	4.0
Cadmium	0.05	0.1	0.2
Chromium	0.5	1.0	5.0