Changes

*Remove trash, debris and sediment annually to biannually or when the device sump is half full;

*Remove trash, debris and sediment annually to biannually or when the device sump is half full;

*Measure sediment depth or volume during each cleaning, or annually to estimate accumulation rate and optimize frequency of maintenance

*Measure sediment depth or volume during each cleaning, or annually to estimate accumulation rate and optimize frequency of maintenance

|[[File:Pretreatment pass bio.PNG|310px|thumb|center|[[Forebay]] is free of sediment, trash and debris and recently maintained. The large stones in the feature are used to slow down and spread out inflowing water into the feature and they remain well arranged and in place.]]  

|[[File:Pretreat Pass swale.PNG|310px|thumb|center|The [[Vegetated filter strips|grass filter strip]] pretreatment is free of sediment, trash and debris. (Source: Abbey and Associates).]]  

|[[File:Pretreatment fail bio.PNG|290px|thumb|center|An erosion gully occurring where bare soil is starting to become visible on the [[Vegetated filter strips|grass filter strip]] pretreatment feature at the inlet, thus indicating it is not effectively slowing and spreading out the inflow of stormwater to the BMP.]]  

|[[File:Pretreat Fail swale.PNG|310px|thumb|center|Sediment and debris has accumulated in the [[forebay]] and is preventing stormwater from flowing into the BMP]]  

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|'''[[Inlets]] & [[Overflow: Gallery|Overflow Outlets]]'''

|'''[[Inlets]] & [[Overflow: Gallery|Overflow Outlets]]'''

*Measure sediment depth or volume during each cleaning or annually to estimate accumulation rate and optimize frequency of maintenance;

*Measure sediment depth or volume during each cleaning or annually to estimate accumulation rate and optimize frequency of maintenance;

*Remove woody [[vegetation]] from filter bed at [[inlets]] annually.

*Remove woody [[vegetation]] from filter bed at [[inlets]] annually.

|[[File:Inlet Obstruction Pass swale.PNG|300px|thumb|center|There are no obstructions at the inlet and stormwater can freely flow into the BMP.]]  

|[[File:Inlet Obstruction Pass swale.PNG|340px|thumb|center|There are no obstructions at the inlet and stormwater can freely flow into the BMP.]]  

[[File:Overflow Outlet Pass swale.PNG|thumb|center|300px|The overflow outlet elevation and maximum surface ponding area closely match what was specified in the final design.]]

[[File:Overflow Outlet Pass swale.PNG|thumb|center|340px|The overflow outlet elevation and maximum surface ponding area closely match what was specified in the final design.]]

|[[File:Inlet Obstruction Fail swale.PNG|255px|thumb|center|Accumulated sediment and vegetation is preventing stormwater from entering the BMP. Sediment on the pavement surface in front of the inlet indicates ponding is occurring.]]  

|[[File:Inlet Obstruction Fail swale.PNG|300px|thumb|center|Accumulated sediment and vegetation is preventing stormwater from entering the BMP. Sediment on the pavement surface in front of the inlet indicates ponding is occurring.]]  

[[File:Overflow Outlet Fail swale.PNG|255px|thumb|center|The elevation of the overflow outlet is higher than what was specified in the design, producing a much larger surface ponding area than intended which could produce standing water for prolonged periods and cause vegetation to die off.]]

[[File:Overflow Outlet Fail swale.PNG|300px|thumb|center|The elevation of the overflow outlet is higher than what was specified in the design, producing a much larger surface ponding area than intended which could produce standing water for prolonged periods and cause vegetation to die off.]]

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|'''Perimeter'''

|'''Perimeter'''

*Repair sunken areas when ≥ 10 cm deep and barren/eroded areas when ≥ 30 cm long;

*Repair sunken areas when ≥ 10 cm deep and barren/eroded areas when ≥ 30 cm long;

*Remove sediment when > 5 cm deep or time to drain water ponded behind [[check dams]] exceeds 48 hours.

*Remove sediment when > 5 cm deep or time to drain water ponded behind [[check dams]] exceeds 48 hours.

|[[File:Filter bed bio pass.PNG|295px|thumb|center|There are no erosion gullies or bare soil areas on the filter bed surface and mulch cover remains in place.]]  

|[[File:Filter Bed Pass swale.PNG|295px|thumb|center|The filter bed has retained its original grading without any sharp depressions that would indicate surface bed sinking.]]  

|[[File:Filter bed bio fail.PNG|300px|thumb|center|Erosion gullies and bare soil areas are present on the filter bed surface, indicating that concentrated flow occurs regularly into the BMP feature. (Photo Source: CVC).]]  

|[[File:Filter Bed Fail swale.PNG|300px|thumb|center|Clear evidence of bed sinking is visible, creating a preferential ponding area where vegetation has died off.]]  

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|'''[[Vegetation]]'''

|'''[[Vegetation]]'''