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Does the project discharge to the MS4?

Does the project discharge to the MS4?. Start Here. N o. No stormwater control requirements. Y es. Is the project Exempt?. N o. Will the project create > 2,500 ft2 of new OR replaced OR new plus replaced impervious surface?.

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Does the project discharge to the MS4?

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  1. Does the project discharge to the MS4? Start Here No No stormwater control requirements Yes Is the project Exempt? No Will the project create > 2,500 ft2 of new OR replaced OR new plus replaced impervious surface? Will the project create >5,000 ft2 of new OR replaced OR new plus replaced impervious surface? Does the project result in < 5,000 ft2 net impervious surface? Yes No No Stormwater Requirements Performance Requirement #1 only required Yes No Yes Is the project a single family residence? See Figure 1d Performance Requirement 1 and 2 No Performance Requirement #1 Will the project create >15,000 ft2 of new OR replaced OR new plus replaced impervious surface? No additional Stormwater Requirements Yes No No No additional Stormwater Requirements Yes See Figure 1b Figure 1a. Requirements for small new and redevelopment projects

  2. Project creates >15,000 ft2 of new OR replaced OR new plus replaced impervious surface? Does the project fall under the Special Circumstances designation? See Special Circumstances Requirement #5 No For projects located in other WMZs For projects located in WMZ 3, 6, or 9? Yes Performance Requirements 1 and 2 only Performance Requirements 1, 2, and 3 Will the project create > 22,500 ft2 of new OR replaced OR new plus replaced impervious surface? No No additional Stormwater Requirements Yes See Figure 1c Figure 1b. Requirements for medium sized new and redevelopment projects

  3. Yes Does the project fall under the Special Circumstances designation? No See Special Circumstances Requirement # Performance Requirements 1, 2, 3 and 4 Project creates > 22,500 ft2 of new OR replaced OR new plus replaced impervious surface Figure 1c. Requirements for large new and redevelopment projects

  4. Amount of new OR replaced OR new plus replaced impervious surface created by the single family residence Greater than or equal to 15,000 ft2 and less than 22,500 ft2 Greater than or equal to 2,500 ft2 and less 15,000 ft2 Greater than or equal to 22,500 ft2 Performance Requirement 1 only Performance Requirements 1, 2, and 3 Performance Requirements 1, 2, 3, and 4 Figure 1d. Requirements for Single Family Residential projects

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