In addition to the Glossary of Terms found in Attachment D to the Los Angeles County Municipal Storm Water Permit Order No. R4-2021-0105, the following words and phrases shall have the following specific meanings:
"Adverse impact"
means any detrimental effect upon water quality or beneficial uses caused by a discharge of loading of a pollutant or pollutants.
"Area susceptible to runoff"
means any surface directly exposed to precipitation or in the path of runoff caused by precipitation that leads directly to neighboring properties or to the street.
"Areas of special biological significance"
means all those areas designated by the State Water Board as ocean areas requiring protection of species or biological communities to the extent that maintenance of natural water quality is assured. All areas of special biological significance are also classified as a subset of State Water Quality Protection Areas.
"Authorized enforcement officer"
means the city's code enforcement officer and the Director of Public Works, including any person so designated by the director of public works.
"Authorized non-stormwater discharge"
means discharges that are not composed entirely of stormwater and that are either: (1) separately regulated by an Industrial or General NPDES permit and allowed to be discharges into the MS4 when in compliance with all NPDES permit conditions; (2) separately regulated by a conditional waiver of water discharge requirements (WDRs) or WDRs for agricultural lands; (3) authorized by U.S. EPA pursuant to sections 104(a) or 104(b) of Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) that either: (i) will comply with water quality standards as applicable or relevant and appropriate requirements (ARARs) under Section 121(d)(2) of CERCLA; or (ii) are subject to: (a) a written waiver of ARARs by U.S. EPA pursuant to Section 121(d)(4) of CERCLA; or (b) a written determination by U.S EPA that compliance with ARARs is not practicable considering the exigencies of the situation, pursuant to 40 CFR Section 300.415(j)(4); or necessary for emergency response purposes, including discharges from emergency firefighting activities.
"Automotive service facility"
means a facility that is categorized by any one of the following Standard Industrial Classification (SIC) and North American Industry Classification System (NAICS) codes. For inspection purposes, facilities with SIC codes 5013, 5014, 5511, and 5541, will not be subject to inspection provided that these facilities have no outside activities or materials that may be exposed to stormwater.
SIC Code
Corresponding NAICS Code
5013
425120, 441310, 425110, and 423120
5014
425120, 425110, 423130, and 441320
5511
441110
5541
447110 and 447190
7532
811121
7533
811112
7534
326212 and 811198
7536
811122
7537
811113
7538
811111
7539
811198 and 811118
"Best management practices" ("BMPs")
means practices or physical devices or systems designed to prevent or reduce pollutant loading from stormwater or non-stormwater discharges to receiving waters.
"City"
means the City of San Dimas.
"Code"
means the San Dimas Municipal Code.
"Conditionally exempt non-stormwater discharge"
means certain categories of discharges that are not composed entirely of stormwater and that are allowed by the Los Angeles Water Board to discharge into the MS4, if the discharge is in compliance with all specified requirements; are not otherwise regulated by an individual or general NPDES permit; and are essential public services that are directly or indirectly required by other state or federal statute and/or regulation. These include non-stormwater discharges such as from drinking water supplier distribution system releases. Conditionally exempt essential non-stormwater discharges may contain minimal amounts of pollutants, however, when in compliance with industry standard BMPs and control measures, do not result in significant environmental effects.
"Construction activity"
means any construction or demolition activity, clearing, grading, grubbing, or excavation or any other activity that result in land disturbance. Construction does not include emergency construction activities required to immediately protect public health and safety or routine maintenance activities required to maintain the integrity of structures by performing minor repair and restoration work, maintain the original line and grade, hydraulic capacity, or original purposes of the facility. See "routine maintenance" definition for further explanation. Where clearing, grading, or excavating of underlying soil takes place during a repaving operation, State General Construction Permit coverage by the State of California General Permit for Storm Water Discharges Associated with Industrial Activities or for stormwater discharges associated with construction activities is required if more than one acre is disturbed or the activities are part of a larger plan.
"Construction general permit"
means general permit for storm water discharges associated with construction and land disturbance activities. General NPDES permit issued by the State Water Board, which authorizes the discharge of stormwater from construction activities under certain conditions.
"Control"
means to minimize, reduce, eliminate, or prohibit by technological, legal, contractual or other means, the discharge of pollutants from an activity or activities.
"Dechlorinated/debrominated swimming pool discharge"
means swimming pool discharges with do not contain measurable quantities of chlorine or bromine and do not contain any detergents, wastes, or additional chemicals not typically found in swimming pool water. The term does not include swimming pool filter backwash.
"Discharge"
means without qualification the release or a pollutant or pollutants to the MS4.
"Disturbed area"
means an area altered as a result of clearing, grading and/or excavation of earth.
"Drinking water distribution system discharges"
means sources of flows from drinking water storage, supply, and distribution systems including flows from system failures, pressure releases, system maintenance, distribution line testing, fire hydrant flow testing; and flushing and dewatering of pipes, reservoirs, vaults, and minor non-invasive well maintenance activities not involving chemical addition(s). It does not include wastewater discharges from activities that occur at wellheads, such as well construction, well development (i.e., aquifer pumping tests, well purging, etc.), or major well maintenance.
"Emergency situation"
means any incident, whether natural, technological, or human-caused, that requires responsive action to protect life of property.
"Gray water"
means water that is discharged from sinks, showers, tubs, washing machines, dishwashers, and garbage disposals.
"Hazardous waste"
means any material defined as hazardous by Chapter 6.95 of the California Health and Safety Code and any substance designated pursuant to 40 CFR 302. This includes unlisted hazardous substances that are solid wastes, as defined in 40 CFR 261.2, that are not excluded from regulation as hazardous wastes under 40 CFR 261.4(b) if they exhibit any of the characteristics identified in 40 CFR 261.20 through 261.24.
"Illicit connection"
means any man-made conveyance that is connected to the storm drain system without a permit, excluding roof drains and other similar type connections. Examples include channels, pipelines, conduits, inlets, or outlets that are connected directly to the storm drain system.
"Illicit discharge"
means any discharge into the MS4 that is prohibited under local, state, or federal statues, ordinances, codes, or regulations. The term illicit discharge includes any non-stormwater discharge, except those authorized non-stormwater discharges; conditionally exempt non-stormwater discharges; and non-stormwater discharges resulting from natural flows specifically identified in this chapter.
"Industrial general permit"
means a general permit for storm water discharges associated with industrial activities. General NPDES permit issued by the State Water Board, which authorizes the discharge of stormwater from certain industrial activities under certain conditions.
"Industrial/commercial facility"
means any facility involved and/or used in the production, manufacture, storage, transportation, distribution, exchange or sale of goods and/or commodities, and any facility involved and/or used in providing professional and non-professional services. This category of facilities includes, but is not limited to, any facility defined by either the Standard Industrial Classifications (SIC) or the North American Industry Classification System (NAICS).
"LID"
means Low Impact Development. LID consists of building and landscape features designed to retain or filter stormwater runoff.
"Municipal separate storm sewer system (MS4)"
means a conveyance or system of conveyances (including roads with drainage systems, municipal streets, catch basins, curbs, gutter, ditches, man-made channels, or storm drains) (40 CFR Section 122.26(b)(8)) that is the following:
1. 
Owned or operated by a state, city, town, borough, county, parish, district, association, or other public body (created by or pursuant to state law) having jurisdiction over disposal of sewage, industrial wastes, stormwater, or other wastes, including special districts under state law such as a sewer district, flood control district or drainage district, or similar entity, or an Indian tribe or an authorized Indian tribal organization, or a designated and approved management agency under Section 208 of the CWA that discharges to waters of the United States;
2. 
Designed or used for collecting or conveying stormwater; and
3. 
Which is not part of a publicly owned treatment works (POTW) as defined at 40 CFR Section 122.2.
"New development"
means land-disturbing activities; structural development, including construction or installation of a building or structure, creation of impervious surfaces; and land subdivision.
"Non-stormwater discharge"
means the flow of any fluid that is not entirely composed of stormwater.
"NPDES"
means the National Pollutant Discharge Elimination System.
"Planning priority projects"
means development projects subject to permittee conditioning and approval for the design and implementation of post-construction controls to mitigate stormwater pollution, prior to completion of the project(s).
"Regional board"
means the California Regional Water Quality Control Board, Los Angeles Region.
"Sidewalk rinsing"
means low-volume pressure washing of paved pedestrian walkways with average water usage of 0.006 gallons per square foot, with no cleaning agents, and proper disposal of all debris collected.
"Storm drain system"
means those facilities that convey stormwater runoff and suspended solids to the waters of the United States, including streets, alleys, roads, ditches, curbs, gutters, catch basins, conduits, streams, channels, creeks, and rivers.
"Stormwater pollution prevention plan" ("SWPPP")
means a plan, as required by a state general permit for discharges of stormwater (e.g., construction general permit or industrial general permit), identifying potential pollutant sources and describing the design, placement, and implementation of BMPs, to effectively prevent non-stormwater discharges and reduce pollutants in stormwater discharges from activities covered by the general permit.
"Stormwater runoff"
means the part of precipitation (rainfall or snowmelt) that travels across a surface to the storm drain system or receiving waters.
"Stormwater"
means water that originates from atmospheric moisture (rainfall, hail, snow, or snowmelt) and that falls onto land, water, or other surfaces.
"Urban runoff"
means surface water flow produced by storm and non-storm events. Non-storm events include flow from residential, commercial, or industrial activities involving the use of potable and non-potable water.
(Ord. 1064 § 4, 1997; Ord. 1306, 7/23/2024)
A. 
The purpose and intent of this chapter is to protect the health and safety of the residents of the city by protecting the beneficial uses, marine habitats, and ecosystems of receiving water from pollutants carried by stormwater and non-stormwater discharges. The intent of the chapter is to enhance and protect the water quality of receiving waters consistent with the Clean Water Act.
B. 
The provisions of this chapter shall apply to the discharge, deposit, addition, or disposal of any non-stormwater, stormwater and/or runoff to the storm drain system and/or receiving waters within the city.
C. 
The city engineer shall establish and enforce uniform standards, guidelines, and/or criteria for specific discharges, connections and/or BMPs.
(Ordinance No. 1306, 7/23/2024)
A. 
Except as otherwise conditionally authorized by the permit or any other NPDES permit, waiver or waste discharge order issued by the U.S. EPA, the State Board, or a regional board, provided that the discharger is in full compliance with all requirements of the permit, waiver or order and other applicable laws and regulations, including the provisions of this chapter, and subject to any requirements specified by the director, no person shall do the following:
1. 
Discharge non-stormwater to the city's storm drain system or to receiving waters except in compliance with the requirements of this chapter;
2. 
Cause, allow, or facilitate any prohibited discharge; and
3. 
Discharge, cause, allow, or facilitate any discharge that may cause or threaten to cause a condition of pollution or nuisance as defined in Water Code Section 13050, that may cause, threaten to cause or contribute to an exceedance of any water quality standard in any Statewide Water Quality Control Plan, California Toxics Rule, or Basin Plan, or that may cause or contribute to the violation of any receiving water limitation.
B. 
Pursuant to the permit, discharges which may be conditionally authorized subject to best management practices and other restrictions or prohibitions, include, but are not limited to, the following types of discharges:
1. 
Authorized non-stormwater discharges separately regulated by an individual or general NPDES permit.
2. 
Authorized non-stormwater discharges separately regulated by a conditional waiver or WDRs for agricultural lands.
3. 
Temporary non-stormwater discharges authorized pursuant to Sections 104(a) or 104(b) of the CERCLA that either: (i) will comply with water quality standards as applicable or relevant and appropriate requirements ("ARARs") under Section 121(d)(2) of CERCLA; or (ii) are subject to either: (a) a written waiver of ARARs pursuant to Section 121(d)(4) of CERCLA; or (b) a written determination that compliance with ARARs is not practicable considering the exigencies of the situation pursuant to 40 CFR. Section 300.415(j).
4. 
Authorized non-stormwater discharges from emergency firefighting activities (i.e., discharges resulting from water use necessary for the protection of life or property from fire).
5. 
Natural flows to include the following:
a. 
Natural springs;
b. 
Flows from riparian habitats and wetlands;
c. 
Diverted stream flows, authorized by the State Water Board or Los Angeles Water Board;
d. 
Uncontaminated ground water infiltration; and
e. 
Rising ground waters, where ground water seepage is not otherwise covered by a NPDES permit.
6. 
Conditionally exempt non-stormwater discharges as follows:
a. 
Conditionally exempt essential non-stormwater discharges to include the following:
i. 
Discharges from essential non-emergency firefighting activities.
ii. 
Discharges from drinking water systems that are not otherwise regulated by an NPDES permit.
b. 
Conditionally exempt non-essential non-stormwater discharges to include the following:
i. 
Dewatering of lakes.
ii. 
Landscape irrigation.
iii. 
Dechlorinated/debrominated swimming pool/spa discharges not otherwise regulated by a separate NPDES permit.
iv. 
Dewatering of decorative fountains.
v. 
Non-commercial car washing by residents or by non-profit organizations.
vi. 
Street/sidewalk wash water.
vii. 
Short-term releases of potable water with no additives or dyes for filming purposes.
viii. 
Potable wash water used to clean reservoir covers.
c. 
Non-stormwater discharges to an ASBS are allowed as follows:
i. 
One of the conditionally exempt non-stormwater discharge categories in subsection (B)(6)(a) above.
ii. 
Essential for emergency response purposes, structural stability, and slope stability, which may include, but are not limited to, the following discharges:
a. 
Discharges associated with emergency firefighting operations (i.e., discharges resulting from water use necessary for the protection of life or property from fire).
b. 
Foundation and footing drains;
c. 
Water from crawl space or basement pumps; and
d. 
Hillside dewatering.
iii. 
Naturally occurring discharges as follows:
a. 
Naturally occurring groundwater seepage via the MS4;
b. 
Non-anthropogenic flows from a naturally occurring stream via a culvert or MS4, if there are no contributions of anthropogenic runoff.
C. 
The city engineer may limit or prohibit any discharge which is conditionally authorized by the permit if the discharge is a source of pollutants or causes or contributes to an exceedance of applicable receiving water limitations or water quality-based effluent limitations, including, but not limited to, imposing conditions on such discharge, requiring control measures and other actions to reduce pollutants, requiring diversion of the discharge to the sanitary sewer, or requiring pretreatment.
D. 
The city engineer may require any person to obtain a permit from the city before discharging or causing, allowing, or facilitating any discharge to the storm drain system. It is unlawful to discharge, cause, allow, or facilitate any discharge to the storm drain system in violation of any permit so required.
E. 
Littering and other discharge of polluting or damaging substances are prohibited.
1. 
No person shall cause any refuse, rubbish, food waste, garbage, or any other discarded or abandoned objects to be littered, thrown, deposited, left, accumulated, maintained or kept in or upon any street, alley, sidewalk, storm drain, inlet, catch basin, conduit, drainage structure, place of business, or upon any public or private property so that the same may or does become a pollutant which may or does enter the storm drain system or receiving waters, except when such materials are placed in containers, bags, recycling bins, or other lawfully established waste disposal facilities protected from stormwater or runoff.
2. 
No person shall cause the disposal of hazardous materials or hazardous wastes into trash containers used for municipal trash disposal.
3. 
No person shall cause to be discharged to the storm drain system or to receiving waters any pesticide, fungicide, or herbicide prohibited by the U.S. EPA or the California Department of Pesticide Regulation.
4. 
No person shall cause the accumulation of pollutants, leaves, dirt, or other landscape debris into a street, alley, catch basin, culvert, curb, gutter, inlet, ditch, natural watercourse, flood control channel, canal, storm drain, or any fabricated or natural conveyance so that the same may or does become a pollutant which may or does enter the storm drain system or receiving waters.
5. 
No person shall cause the disposal of sanitary or septic waste or sewage into the storm drain system from any property or residence or any type of recreational vehicle, camper, bus, boat, holding tank, portable toilet, vacuum truck, or other mobile source of waste holding tank, container, or device.
6. 
No person shall discharge or cause to be discharged anything that would result in or contribute to a violation of the City's NPDES permit and any amendment, revision or re-issuance, thereof, either separately or when combined with other discharges.
F. 
No person shall conduct any industrial activity in the city without obtaining all the permits required by state or federal law, including an NPDES General Industrial Activity Storm Water Permit, when required.
(Ord. 1064 § 4, 1997; Ord. 1112 § 1, 2000; Ord. 1306, 7/23/2024)
A. 
The installation or use of illicit connections prohibited. No person shall install, maintain, or use any connection to the storm drain system or act, cause, permit or suffer any non-stormwater to be discharged or conveyed through a connection to the storm drain system unless the connection has been permitted by the city engineer. This prohibition is retroactive and applies to connections made in the past, regardless of whether made under a permit or other authorization, or whether permissible under the laws or practices applicable or prevailing at the time of the connection.
B. 
Removal of illicit connection from the storm drain system. If any person fails to remove an illicit connection upon notification by the city engineer, or upon revocation of a connection permit, the city engineer may direct the removal of such connection from the storm drain system. Additionally, the city engineer may pursue the recovery of costs for such removal pursuant to Section 14.11.130.
(Ordinance No. 1306, 7/23/2024)
Any owner or occupant of property within the city shall comply with the following best management practices:
A. 
Any person engaged in activities which will or may result in pollutants entering the city storm drain system shall undertake all control measures and BMPs as the city engineer may require to reduce such pollutants. Premises with a high potential threat of discharge may be required to implement a monitoring program meeting standards established by the city. Where best management practices guidelines or requirements have been adopted by any federal, state, regional, and/or city agency, for any activity, operation, or facility which may cause or contribute to stormwater pollution or contamination, illicit discharges, and/or discharges of non-stormwater to the storm drain system, every person undertaking such activity or operation, or owning or operating such facility shall comply with such guidelines or requirements as may be identified by the city engineer.
B. 
Installation of Structural BMPs. No person shall install a structural BMP for the purpose of treating, neutralizing, disposing of monitoring or diverting to the sanitary sewer system any runoff without the approval of the city engineer and of the Los Angeles County Sanitation District or any successor thereto. Such facilities may be subject to plan review, application, and issuance of operating permits.
C. 
BMPs to Be Consistent With Environmental Goals. No person shall install or implement a BMP that transfers pollutants to air, groundwater, surface soils, and/or other media in a manner inconsistent with applicable environmental laws and regulations.
D. 
The city engineer may require any person responsible for any industrial or commercial facility of new or redevelopment project to submit documentation demonstrating coverage by and compliance with any applicable permit, including copies of any notice of intent, stormwater pollution prevention plans, inspection reports, monitoring results, and other information deemed necessary to assess compliance with this chapter or any NPDES permit. Each discharger identified in an individual NPDES permit relating to stormwater discharges shall comply with and undertake all activities required by such permit.
E. 
The city engineer may require any person responsible for any industrial or commercial facility or new development or redevelopment project to enter into an agreement for the operation and maintenance of any structural control measures and to record such agreement with the county recorder's office.
F. 
The following BMPs are required of every owner or occupant of any property:
1. 
No person shall leave, deposit, discharge, dump, or otherwise expose any chemical, fuel, animal waste, garbage, batteries, and/or septic waste in an area where actual or potential discharge to the city streets or the storm drain system may occur. Any spills, discharge, or residues shall be removed as soon as possible and disposed of properly.
2. 
Runoff from landscape irrigation, air conditioning condensate, water-line flushing, foundation/footing drains, individual residential car washing, dechlorinated/debrominated swimming pool/spa discharges, and sidewalk washing shall be conducted in a manner which minimizes or eliminates the possibility of pollutant discharges reaching the city storm drain system or receiving waters.
3. 
Runoff from washing paved areas, including, but not limited to, parking lots, on industrial or commercial property is prohibited unless specifically required by federal, state, or local health or safety codes and not in violation of any other provision of this code. Runoff from authorized washing of paved areas shall be minimized to the extent practicable.
4. 
Objects, such as motor vehicle parts containing grease, oil, or other hazardous materials, and unsealed receptacles containing hazardous materials, shall not be stored in area exposed to stormwater or otherwise susceptible to runoff.
5. 
Any machinery or equipment which is to be repaired or maintained in areas exposed to stormwater or otherwise susceptible to runoff shall be provided with containment areas to control leaks, spills, or discharges.
6. 
All motor vehicle parking lots with more than twenty-five parking spaces and located in areas exposed to stormwater or otherwise susceptible to runoff shall have debris removed by regular sweeping or other equally effective measures. Such debris shall be collected and properly disposed of.
7. 
Motor vehicle parking lots with a gravel/sediment base to implement BMPs to prevent the discharge of gravel and sediment to the MS4.
G. 
The discharge of gray water to street or storm drains is prohibited.
(Ord. 1064 § 4, 1997; Ord. 1306, 7/23/2024)
A. 
The following discharges from industrial or commercial activities are prohibited unless the discharge is in compliance with the provisions of this chapter:
1. 
Discharge of wash waters to the storm drain system from the cleaning of gas stations, auto repair garages, or other types of auto repair facilities;
2. 
Discharge of wastewater to the storm drain system from mobile auto washing, steam cleaning, mobile carpet cleaning, or other such mobile commercial and industrial operations;
3. 
Discharge to the storm drain system from areas where repair of machinery and equipment, including motor vehicles, which are visibly leaking oil, fluids, or coolants is undertaken;
4. 
Discharge to the storm drain system from storage areas for materials containing grease, oil, or hazardous materials, or from uncovered receptacles containing hazardous materials, grease, or oil;
5. 
Discharge of commercial/public swimming pool filter backwash to the storm drain system;
6. 
Discharge from the washing of toxic materials from paved or unpaved areas to the storm drain system;
7. 
Discharge from the washing out of concrete trucks to the storm drain system; and
8. 
Discharge from the washing or rinsing of restaurant mats, equipment, or garbage bins or cans in such a manner that causes non-stormwater to enter the storm drain system.
B. 
Industrial/commercial facility sources required to obtain a NPDES permit. Any industrial or commercial facility required to have a NPDES permit shall retain on site and, upon request, make immediately available to the director the following documents as evidence of compliance with permit requirements, as applicable:
1. 
A copy of a NPDES permit or notice of intent to comply with a general permit to discharge stormwater associated with industrial or construction activity as submitted to the State Board or report of waste discharge as submitted to a regional board of jurisdiction;
2. 
A waste discharge identification number issues by the State Board or copy of the NPDES permit issued by a regional board;
3. 
A SWPPP and a monitoring program plan or group monitoring plan;
4. 
Stormwater quality data;
5. 
Evidence of facility self-inspection; or
6. 
Evidence that facilities has filed a notice of non-applicability (NONA) or any applicable waiver issued by the LOS Angeles Water Board or State Water Board pertaining to stormwater discharges.
C. 
Best management practices for industrial and commercial facilities. All industrial and commercial facilities shall implement BMPs which will effectively prevent the direct or indirect discharge of pollutants to the storm drain system or receiving waters to the maximum extent practicable. Minimum BMPs applicable to all industrial and commercial facilities include, but are not limited to, the following:
1. 
Termination of all non-stormwater discharge to the storm drain system that is not specifically authorized by a NPDES permit;
2. 
Exercising general good housekeeping practices;
3. 
Incorporating regular scheduled preventative maintenance into operations;
4. 
Maintaining spill prevention and control procedures;
5. 
Implementing soil erosion control;
6. 
Posting on-site private storm drains to indicate that they are not to receive liquid, solid wastes, or pollutants;
7. 
Implementing regular cleaning of the on-site private storm drain system;
8. 
Ensuring that stormwater runoff is directed away from operating, processing, fueling, cleaning and storage areas;
9. 
Remove trash, debris, and free-standing oil/grease, spill/leaks from sidewalks and hard surfaces; and
10. 
Sidewalk washing should be performed using high pressure, low-volume spray washing using only potable water with no cleaning agents at an average usage of 0.006 gallons per square feet of sidewalk area.
(Ord. 1064 § 4, 1997; Ord. 1306, 7/23/2024)
A. 
No person shall commence any construction activity for which a permit is required by this chapter or any law or regulation without implementing stormwater and runoff pollution mitigation measures required by such permit(s), law, regulation or this chapter. In addition, prior to obtaining a grading or building permit, each operator of any construction activity shall submit evident to the city engineer that all applicable permits have been obtained, including but not limited to, the general construction activities storm water permit and State Water Board 401 Water Quality Certification.
B. 
No grading permit shall be issued for developments with disturbed areas of one acre or greater or which is part of a larger common plan of development unless the applicant can show that:
1. 
A notice of intent (NOI) to comply with the state construction activity stormwater permit has been filed;
2. 
A stormwater pollution prevention plan (SWPPP) has been prepared; and
3. 
A post-construction plan meeting the low-impact development standards in Chapter 14.13 has been submitted.
C. 
Prior to obtaining a grading or building permit, each operator of a construction site less than one acre shall prepare and submit to the city engineer, a plan to: control erosion and sediment; prevent erosion, sediment loss, and the discharge of construction wastes.
D. 
The following minimum set of BMPs shall apply to all construction sites (regardless of size):
1. 
Site Management - housekeeping.
2. 
Erosion Controls - scheduling and preservation of existing vegetation.
3. 
Sediment Controls - perimeter controls and stabilized construction site entrance and exit.
4. 
Non-Stormwater Management - Water conservation practices and dewatering operations.
5. 
Waste Management - Material delivery and storage; stockpile management; solid waste management; concrete waste management; and sanitary/septic waste management.
E. 
The following minimum BMPs are required for both private or public roadway paving or repair operations:
1. 
Restrict paving and repaving activities to exclude periods of rainfall or predicted rainfall unless required by emergency conditions.
2. 
Install gravel bags and filter fabric or other equivalent inlet protection at all susceptible storm drain inlets and at manholes to prevent spills of paving products and tack coat.
3. 
Prevent the discharge of release of agents including soybean oil, other oils, or diesel to the asphalt.
4. 
Minimize non-stormwater runoff from water use for roller equipment and for evaporative cooling of the asphalt.
5. 
Clean equipment over absorbent pads, drip pans, plastic sheeting or other materials to capture all spillage and dispose properly.
6. 
Collect liquid waste in a container, with a secure lid, for transport to a maintenance facility to be reused, recycled or disposed of properly.
7. 
Collect solid waste by vacuuming or sweeping and securing in an appropriate container for transport to a maintenance facility to be reused, recycled or disposed of properly.
8. 
Cover "cold-mix" asphalt with protective sheeting during a rainstorm.
9. 
Cover loads with tarp before haul-off to a storage site, and do not overload trucks.
10. 
Minimize airborne dust by using water spray or other approved dust suppressant during grinding.
11. 
Avoid stockpiling soil, sand, sediment, asphalt material, and asphalt grindings materials or rubble in or near stormwater drainage systems or receiving waters.
12. 
Protect stockpiles with a cover or sediment barriers during rain.
F. 
Project plans must include a narrative discussion of the reasons used for selecting or rejecting BMPs. In lieu of a narrative, the project architect or engineer of record may sign a statement on the plan to the following effect:
"As the architect/engineer of record, I have selected appropriate BMPs to effectively minimize the negative impacts of this project's construction activities on stormwater quality. The project owner and contractor are aware that the selected BMPs must be installed, monitored, and maintained to ensure their effectiveness. The BMPs not selected for implementation are redundant or deemed not applicable to the proposed construction activities."
G. 
The requirements set forth in this chapter shall apply at the time of demolition of an existing structure or commencement of construction and until the project receives final occupancy/clearance from the city.
(Ord. 1064 § 4, 1997; Ord. 1306, 7/23/2024)
A. 
Any municipal activity/facility required to have a NPDES permit shall prepare the following documents as evidence of compliance with permit requirements, as applicable:
1. 
A copy of an NPDES permit or NOI to comply with a general permit to discharge stormwater associated with industrial or construction activities as submitted to the State Water Resources Control Board or report of waste discharge submitted to the Los Angeles Regional Board;
2. 
A waste discharge identification number issued by the State Water Resources Control Board or copy of the NPDES permit issued by the Los Angeles Regional Board;
3. 
A SWPPP and a monitoring program plan or group monitoring plan;
4. 
Stormwater quality data;
5. 
Evidence of facility self-inspection; or
6. 
Evidence that the facility has filed a Notice of Non-Applicability (NONA) or applicable wavier issued by the Los Angeles Regional Board or State Water Resources Control Board pertaining to stormwater discharges.
B. 
Additionally, the city will implement stormwater BMPs that will address the following public agency areas:
1. 
Sewage systems operations;
2. 
Public construction activities management;
3. 
Vehicle maintenance/material storage facilities management;
4. 
Landscape and recreational facilities management;
5. 
Storm drain operation and management;
6. 
Streets and roads maintenance;
7. 
Parking facilities management;
8. 
Public industrial activities;
9. 
Emergency procedures.
(Ord. 1064 § 4, 1997; Ord. 1306, 7/23/2024)
The city will continue to collaborate with the East San Gabriel Valley Watershed Group and with county-wide and region-wide partners to do the following:
A. 
Increase caused understanding about the importance of stormwater management to public health/community health, environmental quality and local water resiliency, and;
B. 
Increase support for stormwater management program and stormwater projects among the city's residents and businesses.
(Ord. 1064 § 4, 1997; Ord. 1306, 7/23/2024)
A. 
Routine or Area Inspections. Whenever necessary to make an inspection to enforce any of the provisions of this chapter, inspections shall be based upon such reasonable selection process as may be deemed necessary to carry out the objectives of this chapter, including, but not limited to, random sampling and/or sampling in areas with evidence of stormwater contamination, discharges of non-stormwater to the city's storm drain system, discharges which are not pursuant to a NPDES permit, or similar factors.
B. 
Inspection for Reasonable Cause. Whenever an authorized enforcement officer has reasonable cause to believe that there exists in any building or upon any premises any condition which constitutes a violation of the provisions of this chapter, the officer may, upon consent or upon obtaining an inspection warrant, enter such building or premises at all reasonable times to inspect the same or perform any duty imposed upon the officer by this chapter. The following actions may be carried out during such inspection:
1. 
Inspect, sample, make flow measurements of any runoff, discharge, or threatened discharge;
2. 
Place on the premises devices for runoff or discharge sampling, monitoring, flow measurement, or metering;
3. 
Inspect, copy, or examine any records, reports, plans, test results, or other information required to carry out the provisions of this chapter, to the extent allowed by law; and
4. 
Photograph any materials, storage area, waste, waste containers, BMP(s), vehicle(s), connection, discharge, runoff, and/or violation discovered during an inspection.
C. 
Interference with an inspector is prohibited. No person shall, during reasonable hours, refuse, restrict, resist, or attempt to resist the entrance of the city's inspector into any building, factory, plant, yard, construction site or portions thereof in the performance of his/her duty within the powers conferred upon them by law.
D. 
A fee that shall reimburse the city for the costs of inspections of facilities undertaken pursuant to this chapter or any federal, state, regional and/or local regulatory agency order or permit pertaining to stormwater pollution or discharges shall be collected concurrently at the time of payment of the business license fee. The amount of the fee shall be established by city council resolution and is intended to reimburse the city for the costs of inspections, and shall be imposed on those facilities where inspections occur.
(Ord. 1064 § 4, 1997; Ord. 1139 § 1, 2003; Ord. 1306, 7/23/2024)
A. 
Except as otherwise provided in this chapter, for the first failure to comply with any provision of this chapter, the director of public works, or his or her designee, may issue to the affected party a written notice that includes the following information.
1. 
A statement specifying the violation committed and order to comply;
2. 
A specified time period within which the affected person shall correct the failure or file a written notice disputing the notice of violation;
3. 
A statement of the penalty for continued noncompliance.
B. 
Each subsequent failure to comply with any provision of this chapter following written notice issued pursuant to subsection A of this section shall constitute a misdemeanor or an infraction punishable as provided in Chapter 1.12 of the San Dimas Municipal Code. Each day during which a person fails to comply with the provisions of this chapter following written notice shall constitute a separate offense.
C. 
A violation of any provision of this chapter is declared to be a public nuisance and the city is authorized to abate such violation by means of a civil action. Additionally, the director may summarily abate such nuisance upon determination that the nuisance constitutes an immediate threat to public health or safety.
D. 
The penalties and remedies established by this section shall be cumulative and shall include costs incurred by the city for such abatement, including reasonable attorney's fees and other costs of enforcement.
(Ord. 1064 § 4, 1997; Ord. 1306, 7/23/2024)
The degree of protection required by this chapter is considered reasonable for regulatory purposes and is based on scientific, engineering and other relevant technical considerations. The standards set forth herein are minimum standards and this chapter does not imply that compliance will ensure that there will be no unauthorized discharge of pollutants into the waters of the United States. This chapter shall not create liability on the part of the city, any officer or employee thereof, for any damages that result from reliance on this chapter or any administrative decision lawfully made thereunder.
(Ord. 1064 § 4, 1997; Ord. 1306, 7/23/2024)
The provisions of this chapter shall not operate to deprive any property owner of any constitutionally protected right. If a property owner claims that application of this chapter to a specific project would deprive the property owner of a constitutionally protected right, then such property owner shall make application to the city, and the city may allow additional land uses, but only to the extent necessary to avoid depriving the property owner of a proven constitutionally protected right. In any such application the burden shall be on the property owner to demonstrate that strict application of this chapter would cause the deprivation of a constitutionally protected right. Such additional land uses shall be consistent with and carry out the purposes of this chapter as set forth herein, and shall not be inconsistent with any other federal, state, or local laws, including, but not limited to, the city's general plan.
(Ord. 1064 § 4, 1997; Ord. 1306, 7/23/2024)