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,

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

3 Overview of Phase I 3

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

5 Cost Summary – Porous Pavement 7

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 $ " excavation/backfill. 3" porous asphalt. Standard Asphalt $ 2.13 $ 1.04 $ 1.32 $ 4.49 $ "- Excavation/Backfill. 6"-Asphalt. Porous Concrete $ 3.19 $ 1.88 $ 6.34 $ $ "- 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 $ TBD 18"- Excavation/Backfill. 3"-Paver. *Square foot cost are based on actual cost received by the County of San Diego. 8

7 Phase I Treatment Train Schematic 5

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

9 Phase II 9

10 Current and Proposed Porous Pavement and Treatment Train Locations 10

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

12 Phase II Treatment Train Schematic 12

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14 TREATMENT TRAIN Site Preparation 14

15 TREATMENT TRAIN Site Preparation and Excavation 15

16 TREATMENT TRAIN Excavation Around Phase 1 Treatment Train 16

17 TREATMENT TRAIN CONSTRUCTION 17

18 TREATMENT TRAIN Installation of MFS and Storm Filter Chambers 20

19 TREATMENT TRAIN Installation of MFS and Storm Filter Chambers 21

20 TREATMENT TRAIN Installation of Diversion Pipe and Monitoring Boxes 26

21 TREATMENT TRAIN Backfilling Treatment Train 28

22 TREATMENT TRAIN Maintenance 30

23 TREATMENT TRAIN CONSTRUCTION 29

24 TREATMENT TRAIN MSF Unit Replacement Filter 31

25 TREATMENT TRAIN Filter Replacement of Phase 1 MSF Unit 32

26 CDS PRE-TREATMENT CLEAN-OUT After Three Rain Events 33

27 POROUS PAVEMENT Site Preparation 34

28 POROUS PAVEMENT Excavation Engraving 35

29 POROUS PAVEMENT CONSTRUCTION 37

30 POROUS PAVEMENT Installation of Subsurface Overflow Drainage and Monitoring System 38

31 POROUS PAVEMENT CONSTRUCTION 39

32 POROUS ASPHALT PROFILE 41

33 POROUS PAVEMENT Installation of Geotech Style Fabric and Aggregate 44

34 POROUS PAVEMENT Installation of Geogrip Re-enforcement 45

35 POROUS PAVEMENT Porous Asphalt Overlain Aggregate Bed 52

36 POROUS PAVEMENT Installation of Porous Asphalt 50

37 POROUS ASPHALT PROFILE 46

38 POROUS PAVEMENT Installation of Porous Concrete 47

39 POROUS PAVEMENT Porous Concert Curing Process 48

40 POROUS PAVEMENT POST CONSTRUCTION 54

41 POROUS PAVEMENT Asphalt concrete Interface 55

42 POROUS PAVEMENT POST-CONSTRUCTION 56

43 POROUS PAVEMENT Porous Concrete Infiltration 57

44 POROUS PAVEMENT Porous Asphalt Infiltration 58

45 POROUS PAVEMENT Rain Event November 30,

46 POROUS PAVEMENT RAIN EVENT (11/30/2007) 60

47 POROUS PAVEMENT RAIN EVENT (11/30/2007) 61

48 POROUS PAVEMENT RAIN EVENT (11/30/2007) 62

49 POROUS PAVEMENT RAIN EVENT (11/30/2007) 63

50 Results to Date 64

51 Porous Paving Treatments Rainfall and Runoff measured during 11 events during the 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

52 Infiltration Works! 66

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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 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 percent 69

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