Published September 23, 2026
Research question
What evidence should a manufactured-home community retain when roads, pads, drainage, utilities, amenities, or redevelopment disturb soil and may trigger construction-stormwater requirements?
Bottom line
EPA explains that clearing, grading, excavation, and related construction can require NPDES stormwater permit coverage, generally at one acre or more and sometimes below one acre when the work is part of a larger common plan. Permitting authority may be EPA, a state, tribe, or territory, and the applicable permit controls the exact duties. The durable file begins before bidding with jurisdiction, disturbance, common-plan, receiving-water, and operator analysis. It then links permit coverage, the current stormwater pollution prevention plan, site maps, qualified inspections, maintenance, corrective actions, dewatering, rainfall or monitoring data where required, stabilization, notices, and termination. A contractor folder alone does not show which entity had operational control.
Method and limitations
This study reviewed EPA's current construction-stormwater overview, coverage guidance, 2022 Construction General Permit resources, and frequent questions on September 22, 2026. Facts are attributed to EPA. The proposed controls are MobileHomeBiz analysis for records administration. They do not determine jurisdiction, operator status, acreage, common-plan scope, discharge status, receiving water, endangered-species or historic-property eligibility, inspection qualification, or whether coverage is required for a particular project.
Projects need review under the actual permitting authority's current permit and local erosion, grading, floodplain, wetland, utility, and building requirements. Use qualified environmental and engineering support early enough to affect design and contracting.
Preconstruction decision file
Assign a project ID and record property parcels, project phases, scope, plans, total area, estimated disturbed area, related present or future work, ownership, financing, schedule, contractors, and decision authority. Preserve the map and calculation used for disturbance. The one-acre question cannot be reduced to the footprint of one trench if the activity belongs to a larger common plan.
Identify receiving waters and drainage connections using approved sources and field review. Record the permitting authority and why, current permit, eligibility screens, waivers considered, reviewer, decision, and date. Keep rejected or revised designs because they explain later boundaries.
Operator and responsibility matrix
Construction permits often turn on who has control over plans and specifications or day-to-day site activities. Record each entity, legal name, contact, contract scope, control, permit role, notice filing, signature authority, inspection duty, corrective-action authority, and termination responsibility. Obtain professional review; do not infer operator status from who pays an invoice.
The matrix should address phase changes. A developer, general contractor, utility contractor, and property operator can hold different control at different times. Transfers need effective dates and accepted evidence so obligations do not disappear between contracts.
Coverage and notice evidence
Retain the approved plan and eligibility support, submitted notice of intent, certification, submission receipt, authorization date, permit number, public posting where required, correspondence, modifications, and notice of termination. The schedule should prevent land disturbance before coverage becomes effective under the applicable permit.
Statuses must describe evidence: drafted, submitted, correction requested, authorized, modified, termination submitted, or terminated. “Permit done” obscures whether the project is authorized to start or coverage has ended.
SWPPP version control
EPA's resources emphasize a site-specific Stormwater Pollution Prevention Plan. Maintain the signed current version, revision log, site map, operator list, stormwater team, sequence, controls, stabilization practices, pollution-prevention procedures, inspection schedule, and supporting calculations. Keep the accessible site copy as the permit requires.
Every field-driven change should reach the plan through the qualified process. Moved stockpiles, changed entrances, new dewatering, failed controls, added phases, and altered drainage can make an old map misleading. Preserve superseded versions with effective dates rather than overwriting them.
Inspection record
EPA provides site inspection templates designed around its 2022 CGP, but the applicable permit sets frequency and content. Record inspection date and time, inspector and qualification evidence, weather and discharge conditions, areas inspected, controls, stabilization, pollution-prevention practices, photographs, findings, maintenance, corrective-action determination, signatures, and report completion time.
An inaccessible area or unsafe condition is not a pass. Record the limitation, interim protection, and reinspection. Remote staff should not alter a qualified inspector's observations to normalize terminology.
Maintenance and corrective action
Separate routine maintenance from corrective action according to the permit. Link every finding to the exact control and map location, responsible party, deadline, interim measure, work evidence, follow-up inspection, SWPPP revision, and closure. EPA publishes a corrective-action log template for the 2022 CGP, but local permits may differ.
Contractor completion is not closure. The authorized reviewer should verify the result and whether the plan or design needs change. Preserve repeated failures because they may indicate that a control is inadequate, not merely overdue for repair.