Chapter MH-2 — GENERAL SEWER USE REQUIREMENTS

Sections:

MH-5-6201 - GENERAL DISCHARGE PROHIBITIONS.

No user shall introduce or cause to be introduced into the POTW any pollutant or wastewater that causes pass through or interference. These general prohibitions apply to all users of the POTW whether or not they are subject to categorical pretreatment standards or any other federal, State, or local pretreatment standard or requirement.

(Ord. 4353 § 1 (part), 2008; Ord. 4360 § 1 (part), 2008)

MH-5-6202 - SPECIFIC DISCHARGE PROHIBITIONS.

No user shall introduce or cause to be introduced into the POTW pollutants, substances, or wastewater as follows:

(a)

Pollutants that create a fire or explosive hazard in the POTW, including, but not limited to, wastestreams with a closed-cup flashpoint of less than 140 degrees F (60 degrees C) using the test methods specified in 40 CFR Section 261.21;

(b)

Wastewater that has a pH less than 5.0 or more than 12.5 or otherwise causes corrosive structural damage to the POTW or equipment;

(c)

Solid or viscous substances in amounts that may obstruct the flow in the POTW or cause other interference with proper operation or treatment works;

(d)

Pollutants (including oxygen-demanding pollutants such as BOD) released in a discharge at a flow rate and/or pollutant concentration that either singly or by interaction with other pollutants may cause obstruction to flow in sewers or other interference with the POTW;

(e)

Wastewater that may inhibit biological activity in the treatment plant and result in interference;

(f)

Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin in amounts that may cause interference or pass through;

(g)

Pollutants that may result in the presence of toxic gases, vapors, or fumes within the POTW in a quantity that may cause acute worker health or safety problems;

(h)

Trucked or otherwise hauled wastes except in accordance with a wastewater discharge permit or other written authorization issued by the District;

(i)

Noxious or malodorous liquids, gases, solids, or other wastewater that either singly or by interaction with other wastes are sufficient to create a nuisance or hazard to life or prevent entry into the sewers for maintenance or repair;

(j)

Wastewater that imparts color not removable by the treatment process, such as, but not limited to, dye wastes and vegetable tanning solutions that consequently impart color to the treatment plant's effluent and

thereby violate any provision of the District's NPDES Permit;

(k)

Wastewater that contains any radioactive wastes or isotopes except in compliance with applicable State or federal law;

(l)

Storm water, surface water, ground water, artesian well water, roof runoff, subsurface drainage, swimming pool drainage, condensate, deionized water, noncontact cooling water, and unpolluted wastewater unless specifically authorized by the District;

(m)

Sludges, screenings, or other residues from the pretreatment of industrial wastes;

(n)

Medical wastes except as specifically authorized by the District in a wastewater discharge permit;

(o)

Wastewater that alone or in conjunction with other sources causes the treatment plant's effluent to fail an applicable toxicity test;

(p)

Detergents, surface-active agents, or other substances that might cause excessive foaming in the POTW;

(q)

Fats, oils, or greases of animal or vegetable origin in concentrations or amounts that may cause interference or pass through;

(r)

Any liquid that contains suspended solids or dissolved matter of such character and quantity that unusual attention or expense is necessary to handle, process, or treat such matter at the treatment plant; or

(s)

Heat in amounts that inhibit or disrupt biological activity in the POTW or that raise influent temperatures above 104 degrees F (40 degrees C) unless the Central Valley Regional Water Quality Control Board approves alternate temperature limits that justify an alternate allowable influent temperature.

Pollutants, substances, or wastewater prohibited by this section shall not be processed or stored in such a manner that they could be discharged to the POTW or flow through the system to the receiving water so as to cause a violation of the District's NPDES permit.

(Ord. 4353 § 1 (part), 2008; Ord. 4360 § 1 (part), 2008)

MH-5-6203 - NATIONAL CATEGORICAL PRETREATMENT STANDARDS.

(a)

Users must comply with the National Categorical Pretreatment Standards found at 40 CFR Chapter I, Subchapter N, Parts 405-471, including as amended from time-to-time. However, any limits adopted by the District or in this Ordinance that are more stringent than those contained in the Categorical Pretreatment Standards shall apply.

(b)

When wastewater subject to a Categorical Pretreatment Standard is mixed with wastewater not regulated by the same Standard, the District shall impose an alternate limit in accordance with 40 CFR Section 403.6(e).

(Ord. 4353 § 1 (part), 2008; Ord. 4360 § 1 (part), 2008)

MH-5-6204 - STATE PRETREATMENT STANDARDS.

State requirements and limitations on discharges shall apply in any case where they are more stringent than requirements or limitations established under federal law or this Ordinance.

(Ord. 4353 § 1 (part), 2008; Ord. 4360 § 1 (part), 2008)

MH-5-6205 - LOCAL LIMITS AND BEST MANAGEMENT PRACTICES.

(a)

The District shall establish local limits in accordance with 40 CFR Section 403.5(c) as necessary.

(b)

The District may develop best management practices (BMPs) by resolution or in wastewater discharge permits to implement local limits and the requirements of the categorical pretreatment standards.

(Ord. 4353 § 1 (part), 2008; Ord. 4360 § 1 (part), 2008)

MH-5-6206 - THE DISTRICT'S RIGHT OF REVISION.

The District reserves the right to establish more stringent limitations or requirements on discharges to the wastewater disposal system by ordinance or in wastewater discharge permits where consistent with this Ordinance. No establishment or revision of limitations or requirements under this Ordinance shall subject the District to civil liability or penalty for interference with a right (vested or otherwise) of any user.

(Ord. 4353 § 1 (part), 2008; Ord. 4360 § 1 (part), 2008)

MH-5-6207 - DILUTION.

No user shall increase the use of process water or in any other manner attempt to dilute a discharge as a partial or complete substitute for treatment to achieve compliance with a discharge limitation unless expressly authorized by an applicable pretreatment standard or requirement. Nor shall any user increase the use of process water or in any other manner attempt to establish an artificially high flow rate for mass

emission rates. The District may impose mass limitations on users that use dilution to meet applicable pretreatment standards or requirements or as otherwise appropriate.

(Ord. 4353 § 1 (part), 2008; Ord. 4360 § 1 (part), 2008)