Information
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Audit Title
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Client / Site
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Conducted on
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Prepared by
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Location
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Personnel
1. Temporary Stabilization
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1.1. Are there any areas of the site that are disturbed, but will likely lie dormant for over 21 days?
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1.2. Have all dormant, disturbed areas been temporarily stabilized in their entireties?
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1.3. Have disturbed areas outside the silt fence been seeded or mulched?
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1.4. Have soil stockpiles that will sit for over 21 days been stabilized?
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1.5 Has seed and mulch been applied at the proper rate? In general, seed is applied at 3 to 5 lbs per sf and straw mulch is applied at 2-3 bales per 1000 sf
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1.6 Has seed or mulch blown away? If so, repair.
2. Construction Entrances
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2.1 Has the drive been constructed by placing geotextile fabric under the stone?
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2.2 Is the stone 2-inch diameter?
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2.3 Has the stone been placed to a depth of 6 inches, with a width of 10 feet and a length of at least 50 feet (30 feet for entrances onto individual sublots)?
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2.5 If the drive is placed across a ditch, was a culvert pipe used to allow runoff to flow across the drive?
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2.4. If the drive is placed on a slope, has a diversion berm been constructed across the drive to divert runoff away from the street or water source?
3. Sediment Ponds
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3.1 Are concentrated flows of runoff directed to a sediment pond?
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3.2 Is sheet flow runoff from drainage areas that exceed the design capacity of silt fence (generally 0.25 acre or larger) directed to a sediment pond?
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3.3 Is runoff being collected and directed to the sediment pond via the storm sewer or via a network of diversion berms and channels?
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3.4 Is the sediment pond appropriately sized (67 cubic yards per acre of total drainage area)?
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3.5 Have the embankments of the sediment pond and the areas that lie downstream of the pond been stabilized?
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3.6 For sediment basins that dewater 100% between storms , is the riser pipe wrapped with chicken wire and double wrapped with geotextile fabric?
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3.7 Does the riser have 1-inch diameter holes spaced 4 inches apart, both horizontally and vertically?
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3.8 For sediment basins, which dewater 60% between storms, is the diameter of the dewatering hole per plan (see page 105 of Rainwater manual)?
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3.9 For sediment traps, is there geotextile under the stone spillway and is the spillway saddle-shaped?
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3.10 For sediment traps which dewater 100% between storms, is the dewatering pipe end-capped, no larger than 6 inches in diameter, perforated and double-wrapped in geotextile?
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3.11 Is the length -to-width ratio between inlets and outlet at least 2:1? If not, a baffle should be added to lengthen the distance.
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3.12 Is the depth from the bottom of the basin to the top of the primary spillway no more than 3 to 5 feet?
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3.13 For a modified storm water pond being used as a sediment pond, is the connection between the riser pipe and the permanent outlet water tight?
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3.14 Was the basin installed prior to grading the site?
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3.15 Is it time to clean-out the sediment pond to restore its original capacity? Generally, sediment should be removed once th spondylitis is half-full. Stabilize the dragged sediments with seed and mulch.
4. Silt Fence
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4.1 Is the fence at least 4" to 6" in the ground?
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4.2 Is the trench back filled to prevent runoff from cutting underneath the fence?
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4.3 Is the fence pulled tight so it won't sag when water builds up behind it?
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4.4 Are the ends brought upslope of the rest of the fence so as to prevent runoff from going around the ends?
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4.5 Is the fence placed on a level contour? If not, the fence will only act as a diversion.
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4.6 Have all the gaps and tears in the fence been eliminated?
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4.7 Is the fence controlling an appropriate drainage area? Refer to page 119 of Rainwater manual. Rule of thumb, design capacity for 100 linear feet of silt fence is 0.5 acres for slopes less than 2% , 0.25 acres for slopes 2% to 20% and 0.125 acres for slopes 20% or more. Generally, no more than 0.25 acres should lie behind 100 feet of fence at 2% to 10% slope, I.e., the distance between the fence and the top of the slope behind it should be no more than 125 feet. The allowable distance increases on flatter slopes and decreases for steeper slopes.
5. Inlet Protection
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5.1 Does water pond around the inlet when it rains?
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5.2 Has the fabric been replaced when it develops tears or sags?<br>
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5.3 For curb inlet protection, does the fabric cover the entire grate, including the curb window?
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5.4 For yard inlet protection, does the structure encircle the entire grate?
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5.5 Is the fabric properly entrenched or anchored so that water passes through it and not under it?
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5.6 For yard inlet protection, is the fabric properly supported to withstand the weight of water and prevent sagging? The fabric should be supported by a wood frame with cross braces, or straw bales.
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5.7 Is sediment that has accumulated around the inlet removed on a regular basis?
6. Permanent Stabilization
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6.1 Are any areas at final grade?
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6.2 Has the soil been properly prepared to accept permanent seeding?
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6.3 Has seed and mulch been applied at the proper rate (see page 169 of the rainwater manual)?
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6.4 If rainfall has been inadequate, are seeded areas being watered?
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6.5 For drainage ditches where flow velocity exceeds 3.4 ft/s from a 10-year, 24-hour storm, has matting been applied to the ditch bottom?
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6.6 If the flow velocity exceeds 5.0 ft/s, has the ditch bottom been stabilized with rock rip-rap? NOTE: Rock check dams may be needed to slow the flow of runoff.
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6.7 Has rock rip-rap been placed under all storm water outfall pipes to prevent scouring in the receiving stream or erosion of the receiving channel?
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6.8 For sites with steep slopes or fill areas, is runoff from the top of the site conveyed to the bottom of the slope or fill area in a controlled manner so as to not cause erosion?
7. Non-Sediment Pollution Control
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7.1 Has the area been designated for washing out concrete trucks? Washings must be contained on-site within a bermed area until they harden. The washings should never be directed toward a watercourse, ditch or storm drain.
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7.2 Is waste and packaging disposed of in a dumpster? Do not burn them on site.
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7.3 Are fuel tanks and drums of toxic and hazardous materials stored within a diked area or trailer and are away from any watercourse, ditch or storm drain?
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7.4 Are streets swept as often as necessary to keep them clean and free of sediment? NOTE: Sediment should be swept back onto the lot - not down the storm sewers.
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7.5 Are stockpiles of soil or other materials stored away from any watercourse, ditch or storm drain?
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7.6 Have stream crossings been constructed entirely of non-erodible material?
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7.7 If an area of the site is being dewatered, is it being pumped from a sump pit or is the discharge being directed to the sediment pond? NOTE: If you must lower ground water, the water may be discharged to the receiving stream as long as the water remains clean. Be sure not to co-mingle the clean ground water with sediment-laden water or to discharge it off- site by passing it over disturbed ground.
10. Weather
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10.1 Temperature
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10.2 Conditions
Corrective Actions
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Enter any corrective actions that will be undertaken
12. Other
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12.1 Other comments
Sign Off
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On site representative
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Auditor's signature
