Due to a recent spike in COVID-19 cases in Hawaii, Adopt-A-Highway clean up events will be suspended until further notice.

Glossary of Terms

303(d) List

Under Section 303(d) of the Clean Water Act, states are required to compile a list of impaired waters that fail to meet any of their applicable water quality standards or cannot support their designated or existing uses. This list, called a “303(d) list” is submitted to Congress every two years, and states are required to develop a Total Maximum Daily Load (TMDL) for each pollutant causing impairment for water bodies on the list.

Best Management Practices (BMP)

According to 40 CFR 122.2, schedules of activities, prohibitions of practices, maintenance procedures, and other management practices to prevent or reduce the pollution of ‘waters of the United States’. BMPs also include treatment requirements, operating procedures, and practices to control plant site runoff, spillage or leaks, sludge or waste disposal, or drainage from raw material storage.

Clean Water Act

The Clean Water Act is an act passed by the U.S. Congress to control water pollution. It was formerly referred to as the Federal Water Pollution Control Act of 1972 or Federal Water Pollution Control Act Amendments of 1972 (Public Law 92-500), 33 U.S.C. 1251 et seq., as amended by Public Law 96-483, Public Law 97-117, and Public Laws 95-217, 97-117, 97-440, and 100-04.

Code of Federal Regulations (CFR)

The document that codifies all rules of the executive departments and agencies of the federal government. It is divided into fifty volumes, known as titles. Title 40 of the CFR (referenced as 40 CFR) lists all environmental regulations.

Connection Permit

A permit issued by Highways Maui District for physical connections into the Maui District MS4.

Construction BMPs

BMPs to address a short-term storm water contamination threat during construction. They are removed at the conclusion of a construction phase or project.

Construction BMPs

BMPs that address a short-term storm water contamination threat during construction. They are removed at the conclusion of a construction phase or project.

Consultant

The consultant procured by HDOT in order to provide various functions in support of the requirements of the Maui District MS4 NPDES Permit.

Contract Project

A construction project, which is designed either by HDOT personnel or by engineering consultant firms, and is contracted to a private contractor.

Detention Device

Facilities designed to collect and temporarily detain a portion of the storm water runoff for a specified period of time and to permit settlement of particulate pollutants.

Discharge

Any liquid, semi-solid or solid substance that is released into and from the Maui District MS4.

Discharge Permit

A permit issued by Highways Maui District for discharges during construction into the Maui District MS4.

Drainage Area

That portion of the surface area from which storm water runoff flows to a given location. With respect to a highway, this location may be either a culvert, the farthest point of a channel, or an inlet to a roadway drainage system.

Encroachment

Occupancy of HDOT rights-of-way by non-project structures or object of any kind or character; also, the activities of other parties within the HDOT rights-of-way.

Encroachment Project

A construction project undertaken by a non-HDOT entity (i.e., third party) within the HDOT Highways rights-of-way and requires the issuance by HDOT of a Permit to Perform Work upon State Highways.

Erosion

The wearing away of land surface, primarily by wind or water. Erosion occurs naturally as a result of weather or runoff but can be intensified by clearing, grading, or excavation of the land surface.

Erosion Control

Stabilizing a disturbed or exposed surface area in order to prevent soil particles from being detached and causing sediment accumulation in nearby surface waters.

Good Housekeeping

A common practice related to the storage, use, or cleanup of materials performed in a manner that minimizes the discharge of pollutants.

Harbors Tenant

A person, group, partnership, corporation, or any other entity that has an executed lease, revocable permit or disposition instrument under chapter 171, Hawai‘i Revised Statutes (HRS) to use or occupy land, a building, structure, or other property owned by Harbors. This term also includes Harbors’ approved sub-tenants and entities using container or terminal facilities.

Herbicides

Chemical compounds that are used to control weeds.

Illegal Connection

Any connection to the Maui District MS4 that is not permitted by a drain connection permit.

Illicit Discharge

Any connection to the Maui District MS4 that is not permitted by a drain connection permit. Water line flushing; Landscape irrigation; Diverted stream flows; Rising ground waters; Uncontaminated ground water infiltration (as defined in 40 CFR §35.2005(20)); Uncontaminated pumped ground water; Discharges from potable water sources and foundation drains; Air conditioning condensate; Irrigation water; Springs; Water from crawl space pumps and footing drains; Lawn watering runoff; Water from individual residential car washing; Water from charity car washes; Flows from riparian habitats and wetlands; Dechlorinated swimming pool discharges; Residual street wash water; and Discharges or flows from fire fighting activities.

In-House Project

A construction project that is performed by HDOT personnel. These projects are typically small and maintenance related.

Initial Inspection

Inspections conducted on projects that require NPDES coverage, to verify that the construction BMPs identified in the site-specific BMP plan are properly installed and in the correct locations prior to the commencement of ground-disturbing activity.

Maintenance Activities

Routine activities that may require cutting, clearing, grading, or excavation to maintain original line and grade, hydraulic capacity, or original purpose of the facility.

Maintenance Projects

Projects that are performed by outside contractors and are overseen by Maui District Highways’ Maintenance Section (HWY-MM). These projects are typically highway maintenance-related.

Maui District

HDOT Highways and HDOT Harbors, Maui District staff and delegated representatives.

Maui District MS4

The small municipal separate storm sewer system owned and operated by HDOT Highways and HDOT Harbors, Maui District, whose boundaries are delineated by the 2010 U.S. Census Urban Area Map.

Maui District MS4 NPDES Permit

A General NPDES permit issued by HDOH to HDOT for discharges from the small municipal separate storm sewer system on Kahului, Maui and designated as Permit No. HI15KE674.

MS4 User

Those who perform work upon, perform work adjacent to, or use the HDOT roadways and facilities included in the Maui District MS4 network.

Municipal Separate Storm Sewer System (MS4)

A conveyance or system of conveyances (including roads with drainage systems, municipal streets, catch basins, curbs, gutters, ditches, manmade channels, or storm drains) owned by a state, city, town, or other public body, that is designed or used for collecting or conveying storm water, that is not a combined sewer, and that is not part of a publicly owned treatment works [40 CFR 122.26(b)(8)].

National Pollutant Discharge Elimination System (NPDES)

The national program for issuing, modifying, revoking and reissuing, terminating, monitoring and enforcing permits, and imposing and enforcing pretreatment requirements, under Sections 307, 318, 402, and 405 of the CWA.

Non-point Source Pollutants

Pollutants that come from many different sources. Unlike pollution from industrial and sewage treatment plants, non-point source pollution is caused by rainfall or snowmelt moving over and through the ground. As the runoff moves, it picks up and carries away natural and human-made pollutants, finally depositing them into lakes, rivers, wetlands, coastal waters, and even underground sources of drinking water. These pollutants include: Excess fertilizers, herbicides, and insecticides from agricultural lands and residential areas; Oil, grease, and toxic chemicals from urban runoff and energy production; Sediment from improperly managed construction sites, crop and forest lands, and eroding stream banks; Salt from irrigation practices and acid drainage from abandoned mines; Bacteria and nutrients from livestock, pet wastes, and faulty septic systems; and Atmospheric deposition and hydromodification.

Notice of Intent (NOI)

Form completed and signed by a construction site operator or an industrial facility operator notifying the State of Hawaii Department of Health (HDOH) that the operator will comply with an applicable NPDES general permit.

Nutrients

Any substance assimilated by living things that promotes growth. The term is generally applied to nitrogen and phosphorus in wastewater, but is also applied to other essential and trace elements.

Outfall

Refers to the discharge point of a municipal storm sewer system into receiving waters.

Performance Measures

Quantitative indicators of how well (or poorly) a program meets a specific objective.

Periodic Inspections

Inspections of a contract, in-house, or encroachment project’s construction BMPs by an independent inspector who is not involved in overseeing other aspects of the projects construction.

Permanent BMPs

Storm water BMPs designed to be installed and remain in place as part of the project features to provide long-term storm water quality or quantity control.

Point Source Pollution

Point source pollution is when sources of pollution can be traced to a single point into the receiving water. Point Sources account for over 60 percent of the water pollution in the U.S. today. Industry and domestic sewage treatment plants play a major role in point source pollution. Industrial and domestic waste water and discharges include oils, greases, metals, chemicals, nutrients and sediments.

Primary Activities

Categories of activities performed by MS4 Users that aid in developing outreach and training activities. Categories include: Driving – Those who drive on roadways, but do not necessarily perform other activities within or adjacent to HDOT rights-of-way. Non-Storm Water Discharger – Those who have the potential to generate non-storm water discharges, listed in HAR 11-55, Appendix K, Part 1.(a), but do not necessarily perform other activities within or adjacent to HDOT rights-of-way. Road Work – Those who perform road work within and adjacent to HDOT rights-of-way. Landscaping – Those who perform landscaping work within and adjacent to HDOT rights-of-way.

Sanitary Sewer

Pipes that carry only domestic waste water, not storm water.

Sediment

Organic or inorganic material that is carried by or is suspended in water and that settles out to form deposits in the storm drain system or receiving waters.

Sediment Load

Sediment particles maintained in the water column by turbulence and carried with the flow of water.

Site Specific BMP Plan

A plan for controlling pollutants in storm water discharges from sites that meets the requirements of the NPDES for Storm Water Discharges Associated with Construction Activities General Permit.

Soil Stabilization

Erosion control measures used to minimize erosion.

Spill

An accidental dumping or spilling of a potential pollutant onto the ground or into a waterway.

State Waters

All waters, fresh, brackish, or salt, around and within the State, including, but not limited to, coastal waters, streams, rivers, drainage ditches, ponds, reservoirs, canals, ground waters, and lakes.

Storm Water

Storm water runoff, and surface runoff and drainage.

Total Maximum Daily Load (TMDL)

A TMDL establishes the maximum amount of an impairing substance or stressor that a water body can assimilate and still meet Water Quality Standards (WQSs) and allocates that load among pollution contributors. TMDLs are also a tool for implementing State water quality standards. They are based on the relationship between pollution sources and in-stream water quality conditions. A TMDL addresses a single pollutant or stressor for each water body.

Waste Load Allocation

The maximum quantity of pollutants each discharger of waste is allowed to release into a particular waterway as set by an authority. Discharge limits are usually required individually for each specific water quality criterion.

Water Quality Standards (WQSs)

State adopted and USEPA-approved ambient standards for water bodies. The standards prescribe the use of water body and establish the water quality criteria that must be met to protect water bodies.

Watershed

The area of land that catches rain and snow and drains or seeps into a receiving water such as marsh, stream, river, lake or ocean.