HomeMy WebLinkAboutItem 09 - Industrial Wastewater Treatment MEMO TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL
FROM: BRUNO RUMBELOW, CITY MANAGER "
MEETING DATE: JANUARY 20, 2009
SUBJECT: AMENDMENT TO INDUSTRIAL WASTEWATER TREATMENT
ORDINANCE
RECOMMENDATION:
City Council consider adopting an Ordinance amending Chapter 25, Utilities and
Services, Section 25-61(d), relative to Industrial Wastewater Treatment, of the City of
Grapevine Code of Ordinances, and take any necessary action.
BACKGROUND:
The City of Grapevine entered into a contract with the Trinity River Authority of Texas to
provide wastewater treatment service in the early 1980s. The Trinity River Authority
(TRA) is a regional water and wastewater service provider and serves 21 contracting
parties. Grapevine has two wastewater service areas. The north half of Grapevine is
served by the Grapevine Wastewater Treatment Plant and the south half of Grapevine is
served by TRA.
Wastewater treatment facilities operate under the authority of a permit granted by the
United States Environmental Protection Agency and the State of Texas. The permit may
contain a subsection that requires an approved Industrial Pretreatment Ordinance.
Grapevine passed an Industrial Pretreatment Ordinance in 2003 to comply with TRA's
discharge limits.
TRA's has increased their discharge limits for Molybdenum (MO) from 0.2 mg/I to 0.8
mg/I. and have advised their clients that we may increase our Industrial Wastes Pre-
treatment limits similarly.
Staff recommends approval of the Industrial Wastewater Treatment Amendment.
DS
January 9, 2009 (3:29PM)
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ORDINANCE NO. 1 -
AN ORDINANCE OF THE CITY COUNCIL OF THE CITY OF
GRAPEVINE, TEXAS AMENDING THE GRAPEVINE CODE
OF ORDINANCES BY AMENDING SECTION 25-61(d) OF
CHAPTER 25 UTILITIES AND SERVICES RELATIVE TO
INDUSTRIAL WASTEWATER TREATMENT; PROVIDING A
SEVERABILITY CLAUSE; DECLARING AN EMERGENCY
AND PROVIDING AN EFFECTIVE DATE.
WHEREAS, the City of Grapevine is authorized to adopt ordinances to protect the
health, safety, and welfare of the public; and
WHEREAS, the City of Grapevine is currently provided Wastewater Treatment
Services by the Trinity River Authority; and
WHEREAS, the terms of the contract for service with the Trinity River Authority
requires that the discharge limits adopted by the authority be similarly adopted by the City
of Grapevine; and
WHEREAS, the Trinity River Authority has amended its discharge limits for
Molybdenum (Mo) from 0.2 mg/I to 0.8 mg/I; and
WHEREAS, the City of Grapevine City Council deems the passage of this ordinance
to be in the best interests of the public.
NOW, THEREFORE, BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF
GRAPEVINE, TEXAS:
Section 1. That the above premises are found to be true and correct and are
incorporated into the body of this ordinance as if copied in their entirety.
Section 2. That Chapter 25, Article II, Division 3. Industrial Wastes, Section 25-
61(d) is hereby amended in its entirety and replaced in its entirety as follows:
"Local limits. The following pollutant limits are established to protect against pass
through and interference. No person shall discharge or cause or permit to be discharged,
wastewater containing in excess of the following instantaneous maximum allowable
discharge limits into the following system(s): Trinity River Authority POTW and the City of
Grapevine POTW.
0.2 mg/I arsenic
0.1 mg/I cadmium
2.9 mg/I chromium
2.3 mg/I copper
0.5 mg/I cyanide
0.9 mg/I lead
0.0004 mg/I mercury
0.8 mg/I Molybdenum
4.6 mg/I nickel
200 mg/I oil and grease
0.1 mg/I selenium
0.8 mg/I silver
8.0 mg/I zinc
2.13 mg/I TTO
5.5 <= pH <= 11.0
Standard Units
The above limits apply at the point where the wastewater is discharged to the
POTW. All concentrations for metallic substances are for "total" metal unless indicated
otherwise. The designated city official may impose mass limitations in addition to, or in
place of, the concentration-based limitations above."
Section 3. That if any section, article, paragraph, sentence, clause, phrase or
word in this ordinance, or application thereto, any person or circumstances is held invalid
or unconstitutional by a Court of competent jurisdiction, such holding shall not affect the
validity of the remaining portions of this ordinance; and the City Council hereby declares it
would have passed such remaining portions of the ordinance despite such invalidity,which
remaining portions shall remain in full force and effect.
Section 4. That the fact that the present ordinances and regulations of the City of
Grapevine, Texas, are inadequate to properly safeguard the health, safety, morals, peace,
and general welfare of the public creates an emergency which requires that this ordinance
become effective from and after the date of its passage, and it is accordingly so ordained.
PASSED AND APPROVED BY THE CITY COUNCIL OF THE CITY OF
GRAPEVINE, TEXAS on this the 20th day of January, 2009.
APPROVED:
ORD. NO. 2
ATTEST:
APPROVED AS TO FORM:
ORD. NO. 3