c. where construction activity has been suspended due to frozen ground conditions, inspections may be
<br />suspended. Inspections must resume within 24 hours of runoff occurring, or upon resuming
<br />construction, whichever comes first.
<br />72.D.10 ❑ Owner(s)/operator(s) must record all inspections and maintenance activities within 24 hours of being
<br />conducted and these records must be retained with the site plans. These records must include:
<br />a. date and time of inspections, and
<br />b. name of person(s) conducting inspections, and
<br />c. accurate findings of inspections, including the specific location where corrective actions are needed,
<br />and
<br />d. corrective actions taken (including dates, times, and party completing maintenance activities), and
<br />e. date of all rainfall events greater than one-half inch in 24 hours, and the amount of rainfall for each
<br />event. Owner(s)/operator(s) must obtain rainfall amounts by either a properly maintained rain gauge
<br />installed onsite, a weather station that is within one (1) mile of owner(s)/operator(s)r location, or a
<br />weather reporting system that provides site specific rainfall data from radar summaries, and
<br />f. if owner(s)/operator(s) observe a discharge during the inspection, they must record and should
<br />photograph and describe the location of the discharge (i.e., color, odor, settled or suspended solids, oil
<br />sheen, and other obvious indicators of pollutants), and
<br />g. any amendments to the site plans proposed as a result of the inspection must be documented within
<br />seven (7) calendar days.
<br />72.E. Inspection and maintenance:
<br />72.E.1. ❑ Ovvner(s)/operator(s) must place building products and landscape materials under cover (e.g., plastic
<br />sheeting or temporary roofs) or protect them by similarly effective means designed to minimize contact with
<br />stormwater. Ovvner(s)/operator(s) are not required to cover or protect products which are either not a
<br />source of contamination to stormwater or are designed to be exposed to stormwater.
<br />72.E.2. ❑ Owner(s)/operator(s) must place pesticides, fertilizers and treatment chemicals under cover (e.g., plastic
<br />sheeting or temporary roofs) or protect them by similarly effective means designed to minimize contact
<br />with stormwater.
<br />72.E.3. ❑ Owner(s)/operator(s) must store hazardous materials and toxic waste, (including oil, diesel fuel, gasoline,
<br />hydraulic fluids, paint solvents, petroleum -based products, wood preservatives, additives, curing
<br />compounds, and acids) in sealed containers to prevent spills, leaks or other discharge. Storage and
<br />disposal of hazardous waste materials must be in compliance with Minn. R. ch. 7045 including
<br />secondary containment as applicable.
<br />72.E.4. ❑ Owner(s)/operator(s) must properly store, collect, and dispose of solid waste in compliance with
<br />Minn. R. ch. 7035.
<br />72.E.5. ❑ Owner(s)/operator(s) must position portable toilets so they are secure and will not tip or be knocked over.
<br />Owner(s)/operator(s) must dispose of sanitary waste in accordance with Minn. R. ch. 7041.
<br />72.E.6. ❑ Owner(s)/operator(s) must take reasonable steps to prevent the discharge of spilled or leaked chemicals,
<br />including fuel, from any area where chemicals or fuel will be loaded or unloaded including the use of drip
<br />pans or absorbents unless infeasible. Owner(s)/operator(s) must ensure adequate supplies are available at
<br />all times to clean up discharged materials and that an appropriate disposal method is available for
<br />recovered spilled materials. Owner(s)/operator(s) must report and clean up spills immediately as required
<br />by Minn. Stat. § 115.061, using dry clean up measures where possible.
<br />72.E.7. ❑ Owner(s)/operator(s) must limit vehicle exterior washing and equipment to a defined area of the site.
<br />Owner(s)/operator(s) must contain runoff from the washing area in a sediment basin or other similarly
<br />effective controls and must dispose of waste from the washing activity properly. Owner(s)/operator(s) must
<br />properly use and store soaps, detergents, or solvents.
<br />72.E.8. ❑ Owner(s)/operator(s) must provide effective containment for all liquid and solid wastes generated by
<br />washout operations (e.g., concrete, stucco, paint, form release oils, curing compounds and other
<br />construction materials) related to the construction activity. Owner(s)/operator(s) must prevent liquid and
<br />solid washout wastes from contacting the ground and must design the containment so it does not result in
<br />runoff from the washout operations or areas. Owner(s)/operator(s) must properly dispose of liquid and solid
<br />wastes in compliance with Minn. R. ch. 7035. Owner(s)/operator(s) must install a sign indicating the location
<br />of the washout facility.
<br />72.F. Temporary sediment basins:
<br />72.F.1. ❑ Where ten (10) or more acres of disturbed soil drain to a common location, ovvner(s)/operator(s) must
<br />provide a temporary sediment basin to provide treatment of the runoff before it leaves the construction site
<br />or enters surface waters. Ovvner(s)/operator(s) may convert a temporary sediment basin to a permanent
<br />basin after construction is complete. The temporary basin is no longer required when permanent cover has
<br />reduced the acreage of disturbed soil to less than ten (10) acres draining to a common location.
<br />72.F.2. ❑ The temporary basin must provide live storage for a calculated volume of runoff from a two (2)-year,
<br />24-hour storm from each acre drained to the basin or 1,800 cubic feet of live storage per acre drained,
<br />whichever is greater.
<br />https://www.pca.state.mn.us 651-296-6300 800-657-3864 Use your preferred relay service Available in alternative formats
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