Porous Pavement and Model Municipal Operations Center Demonstration Project Phase II
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Transcript of 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 DiegoDEPARTMENT OF GENERAL
SERVICESAugust 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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N
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M12A
Porous Concrete
14,936 s.f.Porous Asphalt
40,126 s.f.
Pavers
7,896 s.f.
Reference Area.
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Porous Pavement Center COC 62,958 s.f.
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Cost Summary – Porous Pavement7
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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.
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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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10Current 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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12Phase II Treatment Train Schematic
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PHASE 2 PAVEMENT
REPLACEMENT SQUARE FOOT
COSTS
18"-30" excavation/backfill. 3" porous asphalt.Porous Asphalt 3.39$ 3.40$ 2.01$ 8.80$ 0.04$
Standard Asphalt 2.13$ 1.04$ 1.32$ 4.49$ 0.06$
Porous Concrete 3.64$ 3.40$ 7.10$ 14.14$ 0.02$
Standard Concrete 1.51$ -$ 3.42$ 4.93$ 0.01$
18"-30" excavation/backfill. 3" porous asphalt.
6"-Excavation/Backfill. 6"-Asphalt.
18"-30" Excavation/Backfill. 5-1/2" pervious concrete.
No new base material. 6"-Reinforced Concrete
PHASE 1 PAVEMENT
REPLACEMENT SQUARE FOOT
COSTS
18"-Excavation/Backfill. 3"-PaverPorous Asphalt 2.75$ 1.88$ 1.87$ 6.50$ 0.02$
Porous Concrete 3.19$ 1.88$ 6.34$ 11.41$ 0.04$
18"-Excavation/Backfill. 3"-Paver
*Square foot cost are based on actual cost received by the County of San Diego.
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TREATMENT TRAIN
Site Preparation14
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TREATMENT TRAIN
Site Preparation and Excavation
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TREATMENT TRAIN
Excavation Around Phase 1 Treatment Train
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TREATMENT TRAIN
CONSTRUCTION
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TREATMENT TRAIN
Installation of MFS and Storm Filter Chambers
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TREATMENT TRAIN
Installation of MFS and Storm Filter Chambers
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TREATMENT TRAIN
Installation of Diversion Pipe and Monitoring Boxes
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TREATMENT TRAIN
Backfilling Treatment Train
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TREATMENT TRAIN
Maintenance
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TREATMENT TRAIN
CONSTRUCTION
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TREATMENT TRAIN
MSF Unit Replacement Filter
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TREATMENT TRAIN
Filter Replacement of Phase 1 MSF Unit
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CDS PRE-TREATMENT CLEAN-OUT
After Three Rain Events33
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POROUS PAVEMENT
Site Preparation
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POROUS PAVEMENT
Excavation Engraving
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POROUS PAVEMENT
CONSTRUCTION
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POROUS PAVEMENT
Installation of Subsurface Overflow Drainage and Monitoring System
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POROUS PAVEMENT
CONSTRUCTION
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POROUS ASPHALT PROFILE 41
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POROUS PAVEMENT
Installation of Geotech Style Fabric and Aggregate
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POROUS PAVEMENT
Installation of Geogrip Re-enforcement
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POROUS PAVEMENT
Porous Asphalt Overlain Aggregate Bed
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POROUS PAVEMENT
Installation of Porous Asphalt
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POROUS ASPHALT PROFILE
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POROUS PAVEMENT
Installation of Porous Concrete
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POROUS PAVEMENT
Porous Concert Curing Process
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POROUS PAVEMENT
POST CONSTRUCTION
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POROUS PAVEMENT
Asphalt concrete Interface
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POROUS PAVEMENT
POST-CONSTRUCTION
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POROUS PAVEMENT
Porous Concrete Infiltration
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POROUS PAVEMENT
Porous Asphalt Infiltration
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POROUS PAVEMENT
Rain EventNovember 30, 2007
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POROUS PAVEMENT
RAIN EVENT (11/30/2007)
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POROUS PAVEMENT
RAIN EVENT (11/30/2007)
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POROUS PAVEMENT
RAIN EVENT (11/30/2007)
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POROUS PAVEMENT
RAIN EVENT (11/30/2007)
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Results to Date
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Porous Paving Treatments
• 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!Porous Asphalt
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Infil
trat
ion
Bas
in W
ater
Lev
el (f
t)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Rai
nfal
l Int
ensi
ty (I
nche
s/ho
ur)
Infiltration Basin Water Level
Rainfall Intensity
OVERFLOW LEVEL
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MFS Performance (Phase I)
• Perlite used as Media• Initial data based upon only 3 events• Effective at further removal of sediment
• Coarse sediments (>63 µ) to <1.8 mg/L.• Fine sediments (<63 µ) to <14 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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