Barstow Municipal Code Art. IV Pretreatment Requirements

Any user who discharges industrial wastewater to the BWWTP shall keep domestic wastewater separate from all industrial wastewater until the industrial wastewater has passed through all required pretreatment and monitoring equipment or devices. For existing users subject to federal categorical pretreatment standards that cannot separate the domestic wastes from the industrial wastes prior to the permitted sample location, the combined wastestream formula shall be applied to determine applicable discharge limitations.

(Ord. No. 965-2019, § 1, 12-2-2019)

All industrial users shall:

(1) Provide wastewater pretreatment, as required, to comply with this chapter;

(2) Achieve compliance with all applicable federal categorical pretreatment standards, as contained in 40 CFR chapter I, subchapter N and amendments thereto, and local limits, whichever are more stringent, within the time limitations specified by the industrial pretreatment division;

(3) Install, operate, and maintain all equipment, systems, and devices required to comply this chapter at the user's expense;

(4) Provide detailed plans to the industrial pretreatment division for review and approval indicating the pretreatment equipment, systems, devices and operating procedures prior to beginning any construction or installation of any equipment. The review of such plans and operating procedures by the industrial pretreatment division shall not relieve the user from the responsibility for pretreating wastewater to produce an effluent acceptable to the industrial pretreatment division under the provisions of this chapter;

(5) No user shall install pretreatment equipment, systems or devices in a confined space or a permit required confined space;

(6) Whenever deemed necessary, the industrial pretreatment division may require users to restrict their wastewater discharge, relocate and/or consolidate points of discharge, separate domestic waste streams from industrial waste streams, and other such conditions as may be necessary to protect the BWWTP and determine the user's compliance with the requirements of this chapter; and

(7) Notify the industrial pretreatment division of any pretreatment equipment failure within 24 hours after the user is aware of the failure. The notification shall be accomplished by a telephone call, email, telefax transmission, personal visit or hand delivered notification, to the city. A written report documenting the cause of the failure and the corrective actions completed shall be submitted to the industrial pretreatment division, within five calendar days after discovery of the pretreatment equipment failure.

(Ord. No. 965-2019, § 1, 12-2-2019)

(a) No user shall bypass any pretreatment equipment or device unless the bypass:

(1) Is necessary to prevent loss of life, personal injury or severe property damage, is not necessitated by some fault of the user, and is the only feasible alternative; or

(2) Is necessary to perform essential maintenance ensuring adequate operation of the pretreatment equipment or device and does not cause a violation of applicable discharge limits.

(b) All users shall comply with the following bypass notification requirements:

(1) Anticipated bypass: The user shall submit a written notice to the industrial pretreatment division at least ten days before the date of the scheduled bypass; or

(2) Unanticipated bypass: The user shall notify the industrial pretreatment division within two hours upon learning that any pretreatment equipment or device has been bypassed. The user shall submit a written report to the industrial pretreatment division within five working days after the bypass. All bypass reports shall include:

a. A description of the bypass, including the volume and duration;

b. If the bypass was corrected; and

c. Actions completed or proposed to prevent a recurrence of the bypass.

(Ord. No. 965-2019, § 1, 12-2-2019)

The industrial pretreatment division shall maintain a file, available to the public, of suitable designs of gravity separation interceptors. This file shall be for informational purposes only and shall not provide or imply any endorsements of any kind. Installation of an interceptor of a design shown in this file, or of any design meeting the size requirements set forth in this chapter shall not subject the city to any liability for the adequacy of the interceptor under actual conditions of use. The user and property owner shall not be relieved of the responsibility of preventing the discharge of industrial wastewater to the BWWTP that exceeds permitted discharge limits.

(Ord. No. 965-2019, § 1, 12-2-2019)

All existing restaurant users shall install a grease interceptor that complies with the requirements of this chapter within 60 days of notification by the industrial pretreatment division. The industrial pretreatment division may require an existing restaurant user to install a grease interceptor under the following conditions:

(1) The user has been determined to cause or contribute to an increase in the frequency of sewer line maintenance cleaning or repairs.

(2) The user has been determined to cause or contribute to sewer line blockages or sanitary sewer overflows (SSOs).

(3) The user has sold or transferred operation of the facility to a new user or operator.

(4) The user has submitted plans for a tenant improvement and or completed any changes to the following:

a. Interior plumbing modification;

b. Increase in seating capacity;

c. Increase in operating hours;

d. A change in the type of food prepared at the facility;

e. A change in the maximum meals served per peak hour;

f. A change in the type of equipment used;

g. Any other changes which result in changes to the quantity or quality of the wastewater discharged to the BWWTP.

(Ord. No. 965-2019, § 1, 12-2-2019)

The building official shall approve all grease interceptors and grease removal devices prior to installation. Any user required by this chapter to install an interceptor shall install, operate, and maintain an adequately sized interceptor that complies with the following conditions:

(1) The interceptor shall be watertight, structurally sound, durable and have a minimum of two chambers with a separate ring and cover for each chamber and all joints sealed with a mastic sealing compound, unless otherwise approved by the building official, to ensure adequate cleaning capabilities. All rings shall be affixed to the interceptor to ensure a gas and watertight seal.

(2) All interceptor chambers shall be immediately accessible at all times for the purpose of inspection, sampling, cleaning, and maintenance. At no time shall any material, debris, obstacles or other obstructions be placed in such a manner that will prevent immediate access to the interceptor.

(3) Any interceptor legally and properly installed before the effective date of this chapter shall be acceptable as an alternative to the current interceptor requirements provided the interceptor is effective in removing floatable and settleable material and is accessible for inspection, sampling, cleaning, and maintenance.

(4) All drains, openings and service lateral lines connected to an approved interceptor shall be kept free from any obstructions or restrictions to wastewater discharge. All drains and openings connected to an approved interceptor shall be equipped with screens or devices that will prevent all material and particles with a cubic dimension greater than three-eighths of an inch from being discharged to the BWWTP.

(5) All interceptors shall be equipped with an influent tee extending no more than 12 inches below the operating fluid level of the interceptor. The interceptor shall also have tees extending to within 12 inches of the bottom at the exit side of each interceptor chamber, including the final chamber. The building official shall review and either approve or deny any alternate manufacturers engineered interceptor designs contrary to standard requirements. No automatic interceptors will be approved, due to the human factor to operate and maintain such equipment.

(6) All gravity interceptors shall be equipped with a sample box.

(7) No user shall install or use any elbows or tees in any interceptor sample box.

(8) No user shall install any interceptor or sample box in a confined space or a permit-required confined space.

(9) If the building official finds, either by knowledge or by observation, that an interceptor is incapable of adequately retaining floatable and settleable material in the wastewater flow, is structurally inadequate, or is undersized for the facility, the building official shall reject such interceptor and declare that the interceptor does not meet the requirements of this section. The user shall be required to promptly install, at the user's expense, an interceptor that is acceptable to the building official. A memorandum of understanding will be drafted by the city and agreed to by signatures from both the property owner and city for the period of time to get new interceptor installed, correct size of the new interceptor, plan submittals, purchasing and installation of said interceptor by a state-licensed contractor.

(10) No user shall abandon, seal, fill, or in any other way bypass an existing interceptor or grease trap unless prior approval has been requested and granted by the building official.

(Ord. No. 965-2019, § 1, 12-2-2019)

(a) Any user that owns, operates, or maintains a new facility for the servicing, repair, cleaning, washing, or any other type of maintenance activities performed on roadway machinery, industrial transportation equipment, motor vehicles, public or private transportation vehicles, shall, prior to discharging wastewater to the BWWTP, install a sand/oil interceptor (minimum 750 gallons unit) in compliance with requirements specified in the most recent version chapter 10 of the California Plumbing Code as may have been amended by the city, or any successor provisions. Such users shall complete and submit a city business questionnaire for review. Any facility for the servicing, repair, cleaning, washing, or any other type of maintenance activities performed on roadway machinery, industrial transportation equipment, motor vehicles, public or private transportation vehicles shall be required to comply with this section as a condition of any expansion or remodeling of the facility that allows the user to increase the level of service, repair, cleaning, washing or maintenance activities at the facility.

(b) The building official shall calculate the size of the sand/oil interceptor required to be installed in accordance with the sizing criteria specified in the most recent version of the California Plumbing Code (CPC), Appendix H, as amended. The interceptor shall have a minimum operational fluid capacity of 750 gallons and be designed to retain material which will float or settle and comply with BMC section 13.12.425. Domestic wastewater, including, but not limited to, wastewater from restrooms, showers, drinking fountains, and condensate (i.e., ice melt, air conditioning condensate) shall not be allowed to pass through the interceptor.

(c) Any user required to install a sand/oil interceptor shall direct all wastewater from all drains, sinks, and wash racks, through the approved sand/oil interceptor.

(d) Any user required to install a sand/oil interceptor shall maintain such interceptor in accordance with BMC section 13.12.445.

(Ord. No. 965-2019, § 1, 12-2-2019)

(a) Except as otherwise provided under section 13.12.440 ("conditional waiver"), no restaurant user shall discharge wastewater to the BWWTP without first complying with all oil/grease interceptor requirements in the most recent version chapter 10 of the California Plumbing Code, or any successor code, and as may have been amended by the city.

(b) Interceptor sizing requirements shall be determined in accordance with the sizing criteria specified in the most recent version of the California Plumbing Code (CPC); provided however, in order to provide adequate retention time for the separation of oil/grease, no gravity interceptor shall have a capacity less than 750 gallons. The building official reserves the right to determine interceptor size and type based on the type of restaurant, the condition of the collection system serving the restaurant, and possible adverse affects caused by the restaurants discharge. The building official also reserves the right to require a larger interceptor when necessary and to set a maximum interceptor size when appropriate, to prevent the accumulation of sewer gas in underutilized interceptors.

(c) Any restaurant user required to install an oil/grease interceptor shall direct all wastewater from all restaurant drains, sinks, wash racks, dishwashers, and garbage grinders through an approved grease interceptor that complies with BMC section 13.12.425. No domestic wastewater, including, but not limited to, wastewater from restrooms, showers, drinking fountains, and condensate (i.e., ice melt, air conditioning condensate) shall be allowed to pass through the grease interceptor.

(d) Any restaurant user required to install a grease interceptor shall maintain such interceptor in accordance with BMC section 13.12.445.

(e) All restaurant users shall segregate all waste oil from deep fryers, cookers, etc. from all other waste streams. The segregated waste oil shall not be discharged to the BWWTP. The waste oil shall be stored onsite and hauled to an approved disposal site within 30 days of the container becoming three-quarters full. The business shall keep a log book of all containers stored onsite and note weekly the volume in each container, reviewed and signed by the site manager. Failure to maintain such records constitutes a violation and is subject to fines.

(Ord. No. 965-2019, § 1, 12-2-2019)

The building official may conditionally waive the requirement to install an interceptor for any restaurant user who can demonstrate to the satisfaction of the industrial pretreatment division that the use does not generate any fat, oil or grease or otherwise have any reasonable potential to cause an adverse effect on the operation of the BWWTP. The building official may revoke such conditional waiver for the following reasons:

(1) Changes in menu;

(2) Falsification of information submitted in the wastewater discharge questionnaire;

(3) Changes in operating hours;

(4) Changes in maximum seating capacity;

(5) Changes in maximum meals served per peak hour;

(6) Changes in equipment used;

(7) Changes in the quantity or quality of the wastewater discharged; or

(8) Increased sewer line maintenance or sanitary sewer overflows (SSOs) which is attributed to the restaurant user's wastewater discharge.

(Ord. No. 965-2019, § 1, 12-2-2019)

(a) All interceptors shall be properly maintained at all times. The interceptor shall be cleaned as often as necessary to ensure that sediment and floating materials do not accumulate to impair the efficiency of the interceptor and odors do not accumulate which would cause a public nuisance. An interceptor is considered to be in violation of this chapter under the following conditions:

(1) Odors generated from the interceptor cause a public nuisance.

(2) The interceptor is not in good working condition and appears to be surcharging.

(3) The operational fluid capacity of the interceptor has been reduced by more than 25 percent by the accumulation of floating material, sediment, solids, oil or grease.

(4) The interceptor has not been serviced within the previous three months or the user has stopped operation, requiring immediate cleaning and inspection to prevent damage to the interceptor and ready it for the next potential customer.

(b) When an interceptor is cleaned, the interceptor must be pumped out completely and the removed sediment, liquid and floating material shall be disposed by a licensed grease hauler at an approved disposal site in accordance with all applicable federal, state, and/or local laws.

(c) The user shall maintain a manifest for the removed interceptor waste. The manifest shall include at a minimum: the name and address of the facility where the waste is removed, the name and address of the grease hauler, the name and address of the disposal site for the interceptor waste, the volume removed, and the date and time of removal. The city is present at all cleanings and the manifest utilized is a city triple copy document. The user must keep a file with all corresponding documentation regarding the interceptor. Failure to maintain such documents is a violation of this chapter and shall subject the user to enforcement actions.

(d) The removed pretreatment waste shall not be reintroduced into the interceptor or discharged into another interceptor at another location.

(e) If the interceptor is not maintained adequately and increased pumping is determined to be insufficient to maintain the effective operation of the interceptor, the user shall install an interceptor of sufficient size that pretreats the wastewater to acceptable standards.

(f) The owner, lessee, sub-lessee, proprietor, operator and superintendent of any facility required to install an interceptor, are individually and severally liable and responsible for any failure to properly maintain such interceptor.

(Ord. No. 965-2019, § 1, 12-2-2019)

(a) All industrial users who discharge wastewater to the BWWTP which is generated from the development of photographic film, film negatives, x-rays, or plate negatives shall install silver recovery pretreatment equipment approved by the industrial pretreatment division.

(b) The silver recovery equipment shall sufficiently remove silver from the fixer solution and any silver laden rinse water to meet the required local discharge limits specified herein.

(c) The photo developing solution shall be separated, reclaimed, and hauled by a licensed liquid wastehauler to an approved disposal site and shall not be discharged to the silver recovery equipment.

(d) The user shall install an approved sample collection device at the discharge end of the silver recovery equipment to facilitate the collection of representative wastewater samples.

(Ord. No. 965-2019, § 1, 12-2-2019)

All permitted users shall report in writing to the industrial pretreatment division for review and approval any proposed changes to the user's operations which may alter the nature, quality, or volume of its wastewater at least 30 days prior to initiation of the proposed changes. The report shall be signed by the authorized representative of the permitted industrial user. For the purposes of this section "changes" shall include, but not be limited to, any of the following:

(1) A sustained 20 percent increase or decrease in the industrial wastewater flow discharged or in production capacity;

(2) Additions, deletions or changes to processes or equipment; or

(3) Experimentation with new processes and/or equipment that will affect the quantity or quality of the wastewater discharged.

(Ord. No. 965-2019, § 1, 12-2-2019)

No user shall knowingly falsify, tamper with, or render inaccurate any monitoring device or any pretreatment equipment or device. Such falsification, tampering, or inaccuracy shall be considered a violation of this chapter and shall subject the user to enforcement actions.

(Ord. No. 965-2019, § 1, 12-2-2019)

All users shall notify the industrial pretreatment division within 24 hours of all wastewater discharges that could cause a problem at the BWWTP, including any slug loadings of any material. Wastewater discharges that may cause a problem at the BWWTP include, but are not limited to, acids, alkalis, oils, greases, high strength organic waste, salts, hazardous substances and waste, colored wastes, and batch discharges. All users shall provide the industrial pretreatment division, within five business days from the incident, a written report detailing the cause of the discharge and the corrective actions completed to prevent a recurrence.

(Ord. No. 965-2019, § 1, 12-2-2019)

If required by the industrial pretreatment division, users shall install spill containment systems which conform to the requirements of this section. The spill containment systems shall be sufficient to prevent the discharge of any bulk chemicals, raw materials, finished product, etc. to the BWWTP. Spill containment requirements include, but are not limited to, the following:

(1) Spill containment systems for tanks, carboys, and vats shall consist of a system of dikes, walls, barriers, berms, or other devices approved by the industrial pretreatment division that are designed to contain a minimum of 110 percent of the liquid contents of the largest container stored in the containment device.

(2) Spill containment systems for drums and barrels may consists of individual spill containment skids, pallets, or other devices approved by the industrial pretreatment division which are designed to contain a minimum of 110 percent of the entire contents of all containers stored in the containment device.

(3) Spill containment systems shall be constructed of materials that are impermeable and non-reactive to the liquids being contained.

(4) Outdoor spill containment systems shall be constructed with adequate covering to prevent the accumulation of water from inclement weather or irrigation within the spill containment device.

(5) Spill containment systems shall not allow incompatible substances to mix and cause a hazardous situation in the event of a failure of one or more containers.

(6) At no time shall a user use a spill containment system for the storage of waste other than from a spill generated from a contained liquid.

(7) Liquid contained within the spill containment system shall be removed as soon as possible.

(Ord. No. 965-2019, § 1, 12-2-2019)

Permitted uses shall develop and maintain a facility waste management plan (FWMP). As determined by the industrial pretreatment division, such FWMP may include the following documents as appropriate:

(1) A toxic organic management plan (TOMP) is required of all categorical industrial users that are permitted to submit a TOMP in lieu of required pollutant monitoring.

(2) A slug load control plan (SLCP) may be required per 40 CFR §403.8(f)(2)(vi), if the POTW cannot effectively control the potential of a non-routine discharge through other control mechanisms such as, but not limited to, spill prevention, control and countermeasure plans or existing emergency and hazardous chemical inventory reports. All identified SIU's must be evaluated and documented as to the control mechanism that will be used to meet the requirements outline in 40 CFR 403.

(3) A pretreatment systems operations manual is required of all industrial users that operate and maintain pretreatment equipment.

(4) A hazardous materials/waste management plan is required of all industrial users that use or possess a hazardous substance or generate a hazardous substance. The San Bernardino County Fire Department, HazMat Division requires a business emergency plan be substituted for to them as a substitution for this hazardous materials/waste management plan.

(5) A waste minimization/pollution prevention plan (WM/PPP) is required of any industrial user:

a. For whom the industrial pretreatment division has determined such WM/PPP is necessary to achieve a water quality objective;

b. Determined by the California State Water Quality Control Board (State or Regional Board) to be a chronic violator, and the state board, RWQCB or city determines that pollution prevention (as defined in Water Code section 13263.3(b)) could assist in achieving compliance; or

c. That the industrial pretreatment division determines significantly contributes, or has the potential to significantly contribute, to the creation of a toxic hot spot as defined in Water Code section 13391.5.

(6) Any required WM/PPP shall include the following information:

a. A wastewater analysis of pollutant(s) that the user discharges to the BWWTP, a description of the source(s) of the pollutant(s), and a comprehensive review of the processes used by the users that result in the generation and discharge of the pollutant(s).

b. An analysis of the potential for pollution prevention to reduce the generation of the pollutant(s), including the application of innovative and alternative technologies and any adverse environmental impacts resulting from the use of those methods.

c. A detailed description of the tasks and time schedules required to investigate and implement various elements of pollution prevention techniques.

d. A statement of the user's pollution prevention goals and strategies, including priorities for short-term and long-term action.

e. A description of the user's existing pollution prevention methods.

f. A statement that the user's existing and planned pollution prevention strategies do not constitute cross media pollution transfers unless clear environmental benefits of such an approach are identified to the satisfaction of the city.

g. Proof of compliance with the Hazardous Waste Source Reduction and Management Review Act of 1989 (article 11.9 of chapter 6.5 of division 20 of the Health and Safety Code, commencing with section 25244.12), if applicable.

h. An analysis of the pollution prevention measures, relative costs, and benefits of the proposed pollution prevention activities selected by the user.

i. A specification of, and rationale for, the technically feasible and economically practicable pollution prevention measures selected by the discharger for implementation.

(Ord. No. 965-2019, § 1, 12-2-2019)