Delineation, Remediation and Redevelopment of a Heavy Metal Hazardous Waste Disposal Site

Transcription

1 Delineation, Remediation and Redevelopment of a Heavy Metal Hazardous Waste Disposal Site Octavius V Catto School Redevelopment Project Camden, New Jersey J. Stuart Wiswall, P.G., LSRP Keating Environmental Management, Inc.

2 Community Revitalization Effort Involving the Collaboration of Public/Private/Regulatory Stakeholders Redevelopment of a Failing Apartment Complex with a Community Park Key Elements of the Project Utilized the Triad Approach for Site Assessment Remediation of a Former Pond Used for Hazardous Waste Disposal and Filled Wirh Historic Fill On-site Stabilization of Hazardous Waste Prior to Off-site Disposal Engineering and Institutional Controls Employed to Manage Residual Contamination

3 Site History and Setting 3

4 1898 Topographic Map 4

5 1940 Aerial Photograph

6 1963 Aerial Photograph Adjacent Pigment Manufacturing Site

7 1967 Aerial Photograph Apartment Complex Constructed

8 E 2005 Abandoned Manufacturing Plant 8

9 Site Plan 9

10 E 2009 Building G Upper Pond Area 10

11 E 2009 Building S On Edge of Buried Pond 11

12 2009 Repaired Settlement Cracks 12

13 Remedial Objectives 13

14 Remedial Objectives 14 Remove Hazardous Waste Protect Groundwater Quality Eliminate Direct Exposure Pathway

15 Site Characterization 15

16 16 Triad Approach Systematic Project Planning Dynamic Work Plan Real Time Measurement Technologies GPR/EM Downhole Conductivity Probe X-Ray Fluorescence On-site Laboratory

17 GPR/EM Survey 17

18 Downhole Conductivity Probe 18

19 Conductivity (ms/m) From Typical Conductivity Log In Pond Historic Fill Peat/Sand Sludge Depth (feet)

20 Pond Limits of Historic Fill And Pond Sludge

21 Identified Contaminants of Concern Historic Fill Benzo(a)anthracene (46 mg/kg), Lead (6,700 mg/kg), Zinc (21,000 mg/kg) Sludge Lead (47,000 mg/kg total, 130 ug/l TCLP) Ground Water Arsenic (18 ug/l), Cadmium (12 ug/l), Chromium (330 ug/l), Lead (67 ug/l), Cyanide (1,570 ug/l)

22 Contaminants of Concern TCLP analysis; lead leached above the toxic characteristic hazardous waste threshold in some sludge samples SPLP Analysis: Potential for lead and arsenic to leach from fill above GWQS

23 Remedial Approach 23 Excavate/Stockpile Historic Fill Dewater Pond, Treat Groundwater and On-site Infiltration Excavate Sludge, Stabilize, Off-site Disposal Install Clean Soil Buffer, Place Historic Fill, Install Clean Soil Cap Establish Ground Water Classification Area and Deed Notice

24 24 S Remediation

25 Remediation Steps 25 Building Decontamination and Removal Foundation Removal Excavation/Stockpiling of Historic Fill from Pond Area Excavation and Stabilization of Sludge Install Clean Soil Buffer Replace Historic Fill Install Cap Establish CEA

26 February

27 Removing Foundations 27

28 Bottles in Foundation Concrete 28

29 Dewatering Wells Installed 29

30 Water Treatment System 30

31 Historic Fill Excavation From Pond 31

32 RRetaining Wall 32

33 Paint Waste in Historic Fill 33

34 Historic Fill Stockpile 34

35 Pond Sludge Layer 35

36 Excavating Sludge 36

37 Sludge Treatment Area 37

38 A Part of the Treatment Area 38

39 Pigment Layering in Sludge 39

40 Pond Bottom 40

41 Confirmation Sampling of Pond Bottom 41

42 Placing Clean Soil Buffer 42

43 Waste Stabilization 43 Stabilization Chemical - Inorganic Mixture of Magnesium Oxide and Calcium Phosphate Attempt to use phosphoric acid-based product unsuccessful; Reaction generated H2S Pre-remediation bench testing to determine treatment ratio for lead Composite sampling of each waste pile to determine lead concentration Product delivered in bulk and mixed with excavator Post treatment composite sampling to verify results

44 Chemical Delivery 44

45 Mixing Chemical 45

46 Treatment Near Completion 46

47 Non-Hazardous Waste Transported Off Site 47

48 Placing Fill in Excavation 48

49 Separation Fabric between Fill and CAP 49

50 Stockton Station Park 50

51 Questions? 51

52 52 THANK YOU Contact Information Name: Stuart Wiswall, P.G., LSRP Keating Environmental Management, Inc. Phone: