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1 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 1 Slide 2 2 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 2 Slide 3 3 Overview of Phase I 3 Slide 4 4 N 11 M12A Porous Concrete 14,936 s.f. Porous Asphalt 40,126 s.f. Pavers 7,896 s.f. Reference Area. 7 Porous Pavement Center COC 62,958 s.f. 4 Slide 5 5 Cost Summary Porous Pavement 7 Slide 6 6 PHASE I PAVEMENT REPLACEMENT SQUARE FOOT COSTS Demolition & Excavation Installation of Sub Base Pavemen t 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. 8 Slide 7 7 Phase I Treatment Train Schematic 5 Slide 8 8 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. 6 Slide 9 9 Phase II 9 Slide 10 10 Current and Proposed Porous Pavement and Treatment Train Locations 10 Slide 11 11 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 11 Slide 12 12 Phase II Treatment Train Schematic 12 Slide 13 13 Slide 14 14 TREATMENT TRAIN Site Preparation 14 Slide 15 15 TREATMENT TRAIN Site Preparation and Excavation 15 Slide 16 16 TREATMENT TRAIN Excavation Around Phase 1 Treatment Train 16 Slide 17 17 TREATMENT TRAIN CONSTRUCTION 17 Slide 18 18 TREATMENT TRAIN Installation of MFS and Storm Filter Chambers 20 Slide 19 19 TREATMENT TRAIN Installation of MFS and Storm Filter Chambers 21 Slide 20 20 TREATMENT TRAIN Installation of Diversion Pipe and Monitoring Boxes 26 Slide 21 21 TREATMENT TRAIN Backfilling Treatment Train 28 Slide 22 22 TREATMENT TRAIN Maintenance 30 Slide 23 23 TREATMENT TRAIN CONSTRUCTION 29 Slide 24 24 TREATMENT TRAIN MSF Unit Replacement Filter 31 Slide 25 25 TREATMENT TRAIN Filter Replacement of Phase 1 MSF Unit 32 Slide 26 26 CDS PRE-TREATMENT CLEAN-OUT After Three Rain Events 33 Slide 27 27 POROUS PAVEMENT Site Preparation 34 Slide 28 28 POROUS PAVEMENT Excavation Engraving 35 Slide 29 29 POROUS PAVEMENT CONSTRUCTION 37 Slide 30 30 POROUS PAVEMENT Installation of Subsurface Overflow Drainage and Monitoring System 38 Slide 31 31 POROUS PAVEMENT CONSTRUCTION 39 Slide 32 32 POROUS ASPHALT PROFILE 41 Slide 33 33 POROUS PAVEMENT Installation of Geotech Style Fabric and Aggregate 44 Slide 34 34 POROUS PAVEMENT Installation of Geogrip Re-enforcement 45 Slide 35 35 POROUS PAVEMENT Porous Asphalt Overlain Aggregate Bed 52 Slide 36 36 POROUS PAVEMENT Installation of Porous Asphalt 50 Slide 37 37 POROUS ASPHALT PROFILE 46 Slide 38 38 POROUS PAVEMENT Installation of Porous Concrete 47 Slide 39 39 POROUS PAVEMENT Porous Concert Curing Process 48 Slide 40 40 POROUS PAVEMENT POST CONSTRUCTION 54 Slide 41 41 POROUS PAVEMENT Asphalt concrete Interface 55 Slide 42 42 POROUS PAVEMENT POST-CONSTRUCTION 56 Slide 43 43 POROUS PAVEMENT Porous Concrete Infiltration 57 Slide 44 44 POROUS PAVEMENT Porous Asphalt Infiltration 58 Slide 45 45 POROUS PAVEMENT Rain Event November 30, 2007 59 Slide 46 46 POROUS PAVEMENT RAIN EVENT (11/30/2007) 60 Slide 47 47 POROUS PAVEMENT RAIN EVENT (11/30/2007) 61 Slide 48 48 POROUS PAVEMENT RAIN EVENT (11/30/2007) 62 Slide 49 49 POROUS PAVEMENT RAIN EVENT (11/30/2007) 63 Slide 50 50 Results to Date 64 Slide 51 51 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. 65 Slide 52 52 Infiltration Works! 66 Slide 53 53 67 Slide 54 54 68 Slide 55 55 MFS Performance (Phase I) Perlite used as Media Initial data based upon only 3 events Effective at further removal of sediment Coarse sediments (>63 ) to