Stormwater BMPs for SIC Code 4221, Stormwater Permitting Guide
SIC Code 4221
2026 Stormwater Permit Compliance for SIC Code 4221 and applicable BMPs
Common Type-Based, Structural BMPs
Point BMP
Constructed Wetland
Infiltration Basin
Bioretention
Sand Filter (surface)
Rain Barrel
Cistern
Wet Pond
Dry Pond
Linear BMP
Grassed Swale
Infiltration Trench
Vegetated Filter Strip
Sand Filter (non-surface)
Area BMP
Green Roof
Porous Pavement
Common Pollutant Sources:
Exposure of lumber, residues, and vehicles/equipment to precipitation
Parts cleaning
Waste disposal of oily rags, oil and gas filters, batteries, coolants, degreasers
Fluid replacement including hydraulic fluid, oil, transmission fluid, radiator fluids, and grease
Diesel fuel
Common Toxicants
Nutrients
nitrates
Pesticides
2,4-D γ -BHC (lindane)
malathion
atrazine
chlordane
diazinon
Other organics
VOCs
1,3-dichloro-benzene
anthracene
benzo(a) anthracene
benzo(b) fluoranthene
benzo(k) fluoranthene
benzo(a) pyrene
bis (2-ethylhexyl) phthalate
fluoranthene
fluorene
naphthalene
pentachlorophenol
phenanthrene
pyrene
Pathogens
enteroviruses
Shigella
Pseudomonas aeruginosa
protozoa
Heavy Metals
nickel
cadmium
chromium
lead
zinc
copper
Salts
chloride
Common Pollutants:
BOD, TSS, oil, and grease
Solvents, oil, heavy metals, acid/alkaline wastes
Oil, heavy metals, solvents, acids
Oil and grease, arsenic, lead, cadmium, chromium, COD, and benzene
Diesel, gasoline, oil
Factors that can affect water quality:
Geographic location
Hydrogeology
Topography
Type, duration, and intensity of precipitation events
Extent of impervious surfaces (e.g., concrete or asphalt)
Type of ground cover (e.g., vegetation, crushed stone, or dirt)
Size of the operation
This site focuses or refers to information and services regarding Best Conventional Pollutant Control Technology (BCT) Notice of Termination (NOT) Stormwater Benchmarks Storm wattle Water Quality Objectives Numeric Action Level (NAL) Exceedance Erosion Effluent Run-on Biochemical Oxygen Demand (BOD) Legally Responsible Person (LRP) Effective Date Division of Water Quality (DWQ) Stormwater Drainage Waste Discharge Identification Number (WDID) Quality Assurance/Quality Control (QA/QC) Waters of the United States North American Industrial Classification System (NAICS) Total Dissolved Solids (TDS) Clean Water Act (CWA) Exceedance Response Action (ERA) Qualified Industrial Storm water Practitioner (QISP) United States Environmental Protection Agency (U.S. EPA) Best Management Practices (BMP) Non-Governmental Organization (NGO) Drainage Area State Water Resources Control Board (SWRCB) Storm Water Pollution Prevention Plan (SWPPP) Northern California New Discharge(r) No Exposure Certification (NEC) Flocculant Socks Water Quality Standards Areas of Special Biological Significance (ASBS) Multi Sector General Permit (MSGP) Source Non stormwater National Pollutant Discharge Elimination System (NPDES) New Industrial General Permit Third Party Environmental Lawsuit (TPEL) Storm Water Systems (SWS) Runoff Control BMPs Third Party Environmental Group (TPEG) Best Practicable Control Technology Currently Available (BPT) Sediment Control BMPs Sheet Flow Structural Controls Southern California Natural Background Best Available Technology Economically Achievable (BAT) Method Detection Limit Notice of Intent (NOI) Total Suspended Solids (TSS) New Source Performance Standards Toxicity Good Housekeeping BMPs Industrial Storm wattles Numeric Action Level (NAL) Oil and Grease (O&G) Discharger Straw Wattles Plastic Materials Erosion Control BMPs Notice of Non Applicability (NONA) Industrial General Permit (IGP) Wattles pH Facility Water Quality Based Effluent Limitation (WQBEL) Total Organic Carbon (TOC) Storm Water Discharge Associated with Industrial Activity Stormwater Permit Sedimentation Municipal Separate Storm Sewer System (MS4) State water Board Stormwater Effluent Limitations Guidelines (ELGs) New Source Performance Standards (NSPS) Sediment Stormwater Discharge Points Operator Technology Based Effluent Limitation (TBEL) Detected Not Quantifiable Turbidity Permit Registration Documents (PRDs) Chain of Custody Minimum Level Regional Water Board Stormwater Guarantee Standard Industrial Classification (SIC) Non Detect Ontario Storm Wattles Industrial Materials Total Maximum Daily Load (TMDL) Wattle Monitoring Implementation Plan Qualifying Storm Event (QSE) Non Storm Water Discharges (NSWD) Trade Secret Effluent Limitation Field Measurements Monitoring Requirements Numeric Effluent Limitation (NEL) Debris Scheduled Facility Operating Hours Storm Water Multiple Application and Report Tracking System (SMARTS) Scrap Metal Permit and more.
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Do businesses with sic code 4221 need a stormwater permit to comply with NPDES? Learn More.
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