stormwater bmps for SIC Code 4221

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.

Stormwater Permits for SIC Codes:


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