Porous Pavement and Model Municipal Operations Center Demonstration Project Phase II

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Porous Pavement and Model Municipal Operations
Center Demonstration Project Phase II

• Photo Document Project
• County of San Diego
• DEPARTMENT OF GENERAL SERVICES
• August 1, 2008

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Order of Review

• Overview of Phase I Results
• Treatment Train
• Site Preparation
• Construction
• Post Construction
• Porous Pavement
• Site Preparation
• Construction
• Post Construction
• Rain Event
• Results to Date

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Overview of Phase I
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Porous Concrete 14,936 s.f.
Porous Asphalt 40,126 s.f.
Pavers 7,896 s.f.
Reference Area.
M12A
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Porous Pavement Center COC 62,958 s.f.
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Cost Summary Porous Pavement
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PHASE I PAVEMENT REPLACEMENT SQUARE FOOT COSTS PHASE I PAVEMENT REPLACEMENT SQUARE FOOT COSTS PHASE I PAVEMENT REPLACEMENT SQUARE FOOT COSTS PHASE I PAVEMENT REPLACEMENT SQUARE FOOT COSTS PHASE I PAVEMENT REPLACEMENT SQUARE FOOT COSTS PHASE I PAVEMENT REPLACEMENT SQUARE FOOT COSTS PHASE I PAVEMENT REPLACEMENT SQUARE FOOT COSTS
  Demolition Excavation Installation of Sub Base Pavement Costs Square Foot Costs Annual Est. Square Foot Maintenance Costs Comments
Porous Asphalt 2.75 1.88 1.87 6.50 0.04 18" excavation/backfill. 3" porous asphalt.
Standard Asphalt 2.13 1.04 1.32 4.49 0.06 6"-Excavation/Backfill. 6"-Asphalt.
Porous Concrete 3.19 1.88 6.34 11.41 0.02 18"-Excavation/Backfill. 5-1/2" pervious concrete.
Standard Concrete 1.51 - 3.42 4.93 0.01 No new base material. 6"-Reinforced Concrete
Porous Pavers 2.75 1.88 9.63 14.26 TBD 18"-Excavation/Backfill. 3"-Paver.
Square foot cost are based on actual cost received by the County of San Diego. Square foot cost are based on actual cost received by the County of San Diego. Square foot cost are based on actual cost received by the County of San Diego. Square foot cost are based on actual cost received by the County of San Diego. Square foot cost are based on actual cost received by the County of San Diego. Square foot cost are based on actual cost received by the County of San Diego. Square foot cost are based on actual cost received by the County of San Diego.
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Phase I Treatment Train Schematic
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Targeted Pollutants of Concern

• Suspended Solids
• Oil/Grease
• Metals (Copper, Zinc, Chromium, Cadmium)
• Organics
• Nitrogen
• Note These are consistent between Phase I and
  Phase II.

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Phase II
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Current and Proposed Porous Pavement and
Treatment Train Locations
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Phase II Expansion

• Three additional media filtration units
• Three additional porous paving test plots (54,000
  sf)
• One additional porous concrete test plot
• Two additional porous asphalt test plots
• Geogrid stabilization under 1/2 of each new
  porous asphalt test plot
• 26,000 sf of roof runoff diverted to porous
  asphalt test beds
• Enhanced monitoring to evaluate current/expanded
  BMP effectiveness

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Phase II Treatment Train Schematic
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TREATMENT TRAIN
Site Preparation
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TREATMENT TRAIN
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Site Preparation and Excavation
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TREATMENT TRAIN
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Excavation Around Phase 1 Treatment Train
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TREATMENT TRAIN
CONSTRUCTION
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TREATMENT TRAIN
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Installation of MFS and Storm Filter Chambers
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TREATMENT TRAIN
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Installation of MFS and Storm Filter Chambers
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TREATMENT TRAIN
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Installation of Diversion Pipe and Monitoring
Boxes
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TREATMENT TRAIN
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Backfilling Treatment Train
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TREATMENT TRAIN
Maintenance
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TREATMENT TRAIN
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CONSTRUCTION
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TREATMENT TRAIN
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MSF Unit Replacement Filter
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TREATMENT TRAIN
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Filter Replacement of Phase 1 MSF Unit
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CDS PRE-TREATMENT CLEAN-OUT
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After Three Rain Events
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POROUS PAVEMENT
Site Preparation
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POROUS PAVEMENT
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Excavation Engraving
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POROUS PAVEMENT
CONSTRUCTION
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POROUS PAVEMENT
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Installation of Subsurface Overflow Drainage and
Monitoring System
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POROUS PAVEMENT
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CONSTRUCTION
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POROUS ASPHALT PROFILE
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POROUS PAVEMENT
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Installation of Geotech Style Fabric and Aggregate
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POROUS PAVEMENT
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Installation of Geogrip Re-enforcement
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POROUS PAVEMENT
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Porous Asphalt Overlain Aggregate Bed
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POROUS PAVEMENT
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Installation of Porous Asphalt
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POROUS ASPHALT PROFILE
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POROUS PAVEMENT
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Installation of Porous Concrete
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POROUS PAVEMENT
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Porous Concert Curing Process
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POROUS PAVEMENT
POST CONSTRUCTION
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POROUS PAVEMENT
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Asphalt concrete Interface
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POROUS PAVEMENT
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POST-CONSTRUCTION
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POROUS PAVEMENT
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Porous Concrete Infiltration
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POROUS PAVEMENT
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Porous Asphalt Infiltration
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POROUS PAVEMENT
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Rain Event November 30, 2007
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POROUS PAVEMENT
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RAIN EVENT (11/30/2007)
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POROUS PAVEMENT
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RAIN EVENT (11/30/2007)
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POROUS PAVEMENT
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RAIN EVENT (11/30/2007)
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POROUS PAVEMENT
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RAIN EVENT (11/30/2007)
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Results to Date
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Porous Paving Treatments
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• Rainfall and Runoff measured during 11 events
  during the 2005-2006 wet season.
• Events ranged from 0.23 inches to 1.07 inches
  during Phase I monitoring.
• All Three Porous Paving Treatments eliminated 100
  percent of the runoff and associated contaminants.

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Infiltration Works!
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MFS Performance (Phase I)
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• Perlite used as Media
• Initial data based upon only 3 events
• Effective at further removal of sediment
• Coarse sediments (gt63 µ) to lt1.8 mg/L.
• Fine sediments (lt63 µ) to lt14 mg/L
• Effective at further removal of contaminants
  strongly associated with particulate contaminants
• e.g. Total Lead concentrations reduced 27-60
  percent

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