FLOOD04935

• County: Statewide
• Basin: Statewide
• Title: Storm Water Management for Constructed Activities
• Date: 9/1/1992
• Prepared By: EPA
• Floodplain - Doc Type: Educational/Technical/Reference Information

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TABLE OF CONTENTS

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1. INTRODUCTION .................................................... 1-1

1.1 PURPOSE OF THIS GUIDANCE MANUAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-1
1 .2 ORGANIZATION OF THIS GUIDANCE MANUAL .... . . . . . . . . . . . . . . . . . . . . . . . 1-1

1.3 DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-2
1.4 GOALS OF EROSION AND SEDIMENT CONTROL AND STORM WATER

MANAGEMENT ................................................. 1-3
1.5 LIMITATIONS OF THIS MANUAL ..................................... 1-4
1.6 ADDITIONAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

2. STORM WATER POLLUTION PREVENTION PLAN ............................. 2-1

2.1 SITE EVALUATION AND DESIGN DEVELOPMENT.. . .. .. ... .. . .. ... . . . . . . .. 2-4

2.1.1 Collect Site Information .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-4
Existing Conditions Site Map ................................... 2-4

Soils Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Runoff Water Quality. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-5
Name of Receiving Water. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Rainfall Data .............................................. 2-5

2.1.2 Develop Site Plan ........................................... 2-5

2.1.3 Prepare Site Map ........................................... 2-6
Approximate Slopes after Grading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-6
Areas of Soil Disturbance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Drainage Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

2.2 ASSESSMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 2-8

2.2.1 Measure Site Area .......................................... 2-8
2.2.2 Determine the Drainage Areas .................................. 2-9
2.2.3 Calculate the Runoff Coefficient ... . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-11

2.3 CONTROL SELECTION/PLAN DESIGN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

2.3.1 Select Erosion and Sediment Controls ............................ 2-14
2.3.2 Select Other Controls ....................................... 2-14
2.3.3 Select Storm Water Management Controls. . . . . . . . . . . . . . . . . . . . . . . .. 2-15
2.3.4 Indicate Location of Controls on the Site Map. . . . . . . . . . . . . . . . . . . . . . . 2-15
2.3.5 Prepare Inspection and Maintenance Plan. . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
2.3.6 Prepare a Description of Controls ............................... 2-17
2.3.7 Coordinate Controls with Construction Activity. . . . . . . . . . . . . . . . . . . . . . 2-17
2.3.8 Incorporate State or Local Requirements .......................... 2-18

2.4 CERTIFICATION AND NOTIFICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

2.4.1 Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

2.4.2 Notice of Intent

2-21

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September 1992