Transcription of Chapter 12 –Stormwater Sand Filters
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Chapter 12 –Stormwater Sand Filters
VDOT BMP Design Manual of Practice i Chapter 12 stormwater sand Filters Chapter 12 stormwater sand Filters TABLE OF CONTENTS Overview of Practice .. 1 Site Constraints and Siting of the filter .. 5 Minimum Drainage Area .. 5 Maximum Drainage Area .. 5 Elevation of Site Infrastructure .. 5 Depth to Water Table and/or Bedrock .. 5 Existing Utilities .. 6 Wetlands .. 6 Upstream Sediment Loading .. 6 Aesthetic Considerations .. 6 Control of Surface Debris .. 6 Hydrocarbon Loading .. 7 Perennial and Chlorinated Flows .. 7 Surface Loading .. 7 General Design Guidelines .. 8 Isolation of the Water Quality Volume (WQV) .. 8 sand filter Media .. 9 Discharge Flows .. 9 filter Sizing .. 9 Design Process .. 10 Step 1. Compute the Required Water Quality Volume .. 10 Step 2A. Size filter and Pre-Treatment Sedimentation Chamber Washington underground Vault sand filter .
The Washington D.C. underground vault sand filter Figure 1shown in.1 2can be either precast or cast in place and is composed of three chambers.
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