# SWPPP Author (NPDES CGP/MSGP) > Author complete Stormwater Pollution Prevention Plan packages for US construction and industrial stormwater programs under EPA CGP, EPA MSGP, California CGO, or state-equivalent permits. Tags: EPA, NPDES, Stormwater, Clean Water Act, United States, Environmental ## Example Prompts - Draft a CGP SWPPP for our 12-acre warehouse construction project before NOI submission - Create an MSGP SWPPP for our scrap recycling facility with benchmark monitoring and quarterly visual assessment forms - Amend our SWPPP for a new outfall and revised BMPs, including the revision log and signatory recertification - Prepare a California CGO SWPPP package with QSD/QSP roles and Risk Level 2 monitoring URL: https://rakenne.app/skills/us-epa-swppp/index.md Try this skill: https://rakenne.app/a/?skill=us-epa-swppp ## Overview Author complete Stormwater Pollution Prevention Plan packages for US construction and industrial stormwater programs under EPA CGP, EPA MSGP, California CGO, or state-equivalent permits. ## What It Covers - CGP SWPPPs for construction sites disturbing one acre or more, including erosion/sediment controls, inspection schedules, corrective actions, and final stabilization support. - MSGP SWPPPs for industrial facilities, including sector-specific pollutant sources, benchmark monitoring, quarterly visual assessments, routine inspections, and AIM escalation. - California CGO SWPPP amendments and packages with QSD/QSP roles, Risk Level handling, SMARTS-ready artifacts, and post-construction stormwater management. - Shared facility-program integration using facility profile, site plan, SDS inventory, contacts, permits register, incident log, and training records. ## Example Conversation > **You:** We're starting a 12-acre warehouse build outside Dallas and need the SWPPP before submitting the NOI. We have two outfalls to a creek impaired for sediment, a fuel tank, concrete washout, and a basic site plan. > **Agent:** I'll prepare a CGP SWPPP package, first checking the shared facility profile, site plan, SDS inventory, contacts, permits register, and incident log so the SWPPP stays consistent with your broader EHS workspace. > **Agent:** I found the site plan and contacts, but the receiving-water impairment evidence and signatory authority are incomplete. I'll list those as missing evidence requests and draft the package with placeholders rather than assuming coverage. > **Agent:** Created the SWPPP narrative, site-map description, pollutant inventory, BMP catalog, inspection form, corrective-action log, training record, and amendment log. Running `swppp_completeness_checker` now. > **Agent:** The checker flagged the non-stormwater discharge evaluation as weak. I added the allowable/prohibited discharge review and reran the checker. The package is ready for QEP/operator review before final certification. ## Sample Output Excerpt Excerpt from a CGP SWPPP package generated with the skill: --- ## 3.2 Receiving Waters, Drainage Areas, and Outfalls | Drainage area | Outfall/discharge point | Receiving water | Impaired water/TMDL? | Sampling point | Substantially identical? | | ---------------------------------- | ----------------------- | -------------------- | ---------------------------------------------- | ------------------------------------- | ------------------------ | | North pad and laydown yard | OF-001 | Bear Creek | Yes — sediment impairment reported by operator | SP-001 at riprap apron | No | | South access road and trailer area | OF-002 | Bear Creek tributary | Yes — same receiving-water segment | SP-002 downstream of inlet protection | No | ## 5. Best Management Practices | Pollutant source | BMP/control | Rationale | Inspection criteria | Maintenance responsibility | | --------------------------------------- | ------------------------------------------------------------------ | -------------------------------------------------------------- | ------------------------------------------------------------- | -------------------------- | | Disturbed soil at warehouse pad | Silt fence, inlet protection, stabilized construction entrance | Controls sediment before discharge to impaired receiving water | Undercutting, overtopping, tears, sediment accumulation | Site superintendent | | Fueling area for construction equipment | Secondary containment, spill kit, no fueling within drainage swale | Reduces petroleum exposure and cross-references SPCC controls | Container integrity, sheen, stained soil, spill-kit inventory | Equipment contractor | | Concrete washout | Lined washout area with signage and capacity checks | Prevents high-pH washwater discharge | Freeboard, liner damage, tracking, overflow risk | Concrete subcontractor | ## 8. Corrective-Action Procedures Deficiencies requiring immediate/interim measures include failed perimeter controls, unauthorized non-stormwater discharge, evidence of sediment discharge, missing BMP maintenance, or a benchmark/AIM trigger in an MSGP context. Permanent corrections must follow the applicable permit deadline and be closed with date, responsible party, and evidence. ## What the Tool Validates **`swppp_completeness_checker`** scans a SWPPP file or package directory for: - Universal SWPPP content: SWPPP team, signatory chain, permit coverage, eligibility evidence, receiving waters, outfalls, impaired-waters/TMDL review, site-map narrative, pollutant inventory, BMP catalog, inspections, corrective actions, training, recordkeeping, amendments, and non-stormwater discharge evaluation. - CGP-specific signals: construction sequence, disturbed acreage, stabilization, erosion/sediment controls, and inspection cadence such as every 7 days or every 14 days plus a 0.25-inch rain-event trigger. - MSGP-specific signals: sector/subsector, Part 8 sector-specific requirements, benchmark monitoring, quarterly visual assessments, and Additional Implementation Measures (AIM) escalation. - California CGO signals: QSD/QSP roles, Risk Level determination, SMARTS artifacts, and state-driven monitoring duties. - Shared workspace consistency: references to `facility/profile.md`, `facility/sds-inventory.csv`, `facility/contacts.md`, and related SPCC, Tier II, RCRA, or RMP data where relevant. The tool returns PASS when required completeness signals are present, or FAIL with the missing areas to resolve before professional review. ## Getting Started Add or update these shared workspace materials before activating the skill: 1. `facility/profile.md` with operator, location, NAICS/SIC, and contact basics. 2. `facility/site-plan.md` or a site-plan image describing drainage, outfalls, BMPs, and material storage. 3. `facility/sds-inventory.csv` for significant materials and pollutant sources. 4. `facility/contacts.md`, `facility/permits-register.md`, `facility/incident-log.md`, and `facility/training-matrix.md` when available. Then ask for the right mode: CGP, MSGP, California CGO, state-equivalent, or amendment. The agent will request missing eligibility evidence instead of inventing it. --- Back to [Skill Library](https://rakenne.app/skills/index.md)