Changes

Moderately clean water, contaminants may include asphalt granules, low levels of hydrocarbons and [[Heavy metals|metals]] from decomposition of roofing materials, animal droppings, natural organic matter and fall out from airborne pollutants, potentially warm water.

Moderately clean water, contaminants may include asphalt granules, low levels of hydrocarbons and [[Heavy metals|metals]] from decomposition of roofing materials, animal droppings, natural organic matter and fall out from airborne pollutants, potentially warm water.

|

|

*Infiltration ([[Bioretention]], [[Bioswales]], [[Enhanced swales]], [[Exfiltration trenches]], [[Infiltration trenches]], [[Permeable pavements]], [[Stormwater Tree Trenches| Stormwater tree trenches]]);

*Infiltration ([[Bioretention]], [[Enhanced swales]], [[Infiltration trenches]], [[Permeable pavements]], [[Stormwater Tree Trenches| Stormwater tree trenches]], etc.);

*Filtration ([[Bioretention]], [[Stormwater planters]]);

*Filtration ([[Bioretention]], [[Stormwater planters]], etc.);

*Harvesting with [[rain barrels]] or [[Infiltration chambers|cisterns]] and use for both indoor and outdoor non-potable purposes (e.g., irrigation, toilet flushing) after [[Pretreatment]];

*Harvesting with [[rain barrels]] or [[Rainwater harvesting|cisterns]] and use for both indoor and outdoor non-potable purposes (e.g., irrigation, toilet flushing) after [[Pretreatment]];

*Attenuation and treatment in [[SWM ponds|wet pond]] or [[wetland]] detention facility.

*Attenuation and treatment in [[SWM ponds|wet pond]] or [[wetland]] detention facility.

|

|

Moderately clean water, contaminants may include low levels of sediment, de-icing salt constituents, hydrocarbons, [[Heavy metals|metals]] and natural organic matter. Typically warm water.

Moderately clean water, contaminants may include low levels of sediment, de-icing salt constituents, hydrocarbons, [[Heavy metals|metals]] and natural organic matter. Typically warm water.

|

|

*Infiltration ([[Enhanced swales]], [[Bioswales]], [[Green Roofs]], [[Bioretention]], [[Permeable pavements]], etc.);

*Infiltration ([[Bioretention]], [[Enhanced swales]], [[Infiltration trenches]], [[Permeable pavements]], [[Stormwater Tree Trenches| Stormwater tree trenches]], etc.);

*Filtration ([[Stormwater Tree Trenches]], [[Soil cells]], [[Stormwater planters]]);

*Filtration ([[Bioretention]], [[Stormwater planters]], etc.);

*Harvesting with [[Infiltration chambers|cisterns]] or [[Permeable pavement]] reservoirs and use for only outdoor non-potable purposes (e.g., vehicle washing, irrigation) after pretreatment;

*Harvesting with [[Rainwater harvesting| cisterns]] or [[Permeable pavement]] reservoirs and use for only outdoor non-potable purposes (e.g., vehicle washing, irrigation) after pretreatment;

*Attenuation and treatment in [[SWM ponds|wet pond]] or [[wetland]] detention facility.

*Attenuation and treatment in [[SWM ponds|wet pond]] or [[wetland]] detention facility.

|

|

Runoff should be treated with a sedimentation and/or filtration practice prior to infiltration. Flow moderation (quantity control) prior to discharge to receiving watercourse is required. Water quality should be tested prior to use for non-potable purposes.

Runoff should be treated with a sedimentation and/or filtration practice prior to infiltration. Flow moderation (quantity control) prior to discharge to receiving watercourse is required. Harvested stormwater quality should be tested prior to use for non-potable purposes.

|-

|-

|High traffic roads and parking lots

|High traffic roads and parking lots

Potential for high levels of contamination with sediment, deicing [[salt]] constituents hydrocarbons and [[Heavy metals|metals]]. Typically warm water.

Potential for high levels of contamination with sediment, deicing [[salt]] constituents hydrocarbons and [[Heavy metals|metals]]. Typically warm water.

|

|

*Filtration after sedimentation [[Pretreatment]];

*Filtration after sedimentation [[Pretreatment| pretreatment]];

*Attenuation and treatment in  [[SWM ponds|wet pond]] or [[wetland]] detention facility;

*Attenuation and treatment in  [[SWM ponds|wet pond]] or [[wetland]] detention facility;

*Infiltration after [[Pretreatment]] only where [[groundwater]] uses are limited.

*Infiltration after [[Pretreatment| pretreatment]] only where [[groundwater]] uses are limited.

|

|

Runoff should be treated with a sedimentation and/or filtration pretreatment practice prior to infiltration.

Runoff should be treated with a sedimentation and/or filtration pretreatment practice prior to infiltration.

|

|

*Attenuation and treatment in  [[SWM ponds|wet pond]], [[wetland]] or hybrid detention facility;

*Attenuation and treatment in  [[SWM ponds|wet pond]], [[wetland]] or hybrid detention facility;

*Potential requirement for sedimentation [[Pretreatment]];

*Potential requirement for sedimentation [[Pretreatment| pretreatment]];

*Infiltration and Harvesting practices not recommended.

*Infiltration and harvesting practices not recommended.

|

|

Runoff from these sources should not be infiltrated or used for irrigation. Spill containment or mitigation devices recommended contingent on size of storage facilities.

Runoff from these sources should not be infiltrated or used for irrigation. Spill containment or mitigation devices recommended contingent on size of storage facilities.