Focused Remedial Plan - August 2007

Inspection Reports:

• 2005 Site Inspection Log, Hamden Middle School and Newhall (4.5 MB)
• 2006 Site Inspection Log, Hamden Middle School and Newhall (4.9 MB)
• 2007 Site Inspection Log, Hamden Middle School and Newhall (4.5 MB)
• 2007 Mill Rock Pump Station Inspection (4.9 MB)
• 2007 (SEPT) Site Inspection Log, Hamden Middle School and Newhall
• Operations and Maintenance Program for Hamden Middle School and Newhall (<1 MB)

Status Update - Former New Haven Water Company Property and Schedule, June 6, 2007

Conditional Approval, April 16, 2007

Second Sample Results for 315-317 Morse Road and Quarterly Ground-Water Results, Former New Haven Water Company Property (15 MB)

Proposed Supplemental Investigation Report, November 15, 2006 (2.5 MB)

Residential Soil-Vapor Sampling Addendum, November 13, 2006 (1.5 MB)

Ground Water Monitoring, Former New Haven Water Company Property, September 29, 2006 (3 MB)

Water Quality Update - Ground Water Monitoring, letter to DEP from Leggette, Brashears & Graham, Feb. 6, 2006 (2 MB)

Middle School Site Hamden, CT, Groundwater Monitoring Requirements, letter to RWA (September 26, 2005)

Review of Final Investigation and Remedial Evaluation Report, letter addressed to RWA (August 31, 2005)

Summary of Final Report/Investigation and Evaluaton of Remedial Alternatives (March 31, 2005)

Final Report/Investigation and Evaluaton of Remedial Alternatives, Former New Haven Water Company Property, Hamden, Connecticut (March 31, 2005)

• Tables (4 MB, 219 pages, large file)
• Figures
  • Figure 1 Site Location Map
  • Figure 2 Site Map
  • Figure 3 Cross Section Locations
  • Figure 4 Geologic Cross Section A-A'
  • Figure 5 Geologic Cross Section B-B'
  • Figure 6 Geologic Cross Section C-C'
  • Figure 7 Geologic Cross Section D-D'
  • Figure 8 Geologic Cross Section E-E'
  • Figure 9 Geologic Cross Section F-F'
  • Figure 10 Geologic Cross Section G-G'
  • Figure 11 Geologic Cross Section H-H'
  • Figure 12 Water Quality Trend at Source Area of Total Halogenated Volatile Organic
• Plates (Maps)
  • Plate 1 Surficial Soil Sample, Test Boring and Monitor Well Locations
  • Plate 2 Sample Locations Collected Prior to Soil Cap placed on Athletic Field in 1995 and 1996
  • Plate 3 Sample Locations Collected after Placement of Soil Cap on athletic Field in 1995 and 1996
  • Plate 4 Approximate Extent and Elevation of Wetland Organic Material
  • Plate 5 Thickness of Protective Cover to Observed Fill
  • Plate 6 Lateral Extent of Observed Fill and Chemically Impacted Unconsolidated Materials
  • Plate 7 Thickness of Observed Fill at Site
  • Plate 8 Approximate Lateral Extent of Industrial Waste Fill Overlaid on 1951 Aerial Photograph
  • Plate 9 Approximate Lateral Extent of Construction Fill Material
  • Plate 10 Approximate Lateral Extent of other Domestic Debris/Municipal Waste
  • Plate 11 Potentiometric Surface for November 19, 2004
  • Plate 12 Potentiometric Surface for Octobder 1, 2004
  • Plate 13 Potentiometric Surface for October 1, 2004
  • Plate 14 Summary of Pesticide Soil Quality Results
  • Plate 15 Summary of Total Metal Soil Quality Results
  • Plate 16 Summary of Leachable Metals Soil-Quality Results
  • Plate 17 Summary of Metal Water-Quality Results
  • Plate 18 Summary of Extractable Total Petroleum Hydrocarbon Soil-Quality Results
  • Plate 19 Summary of Extractable Total Petroleum Hydrocarbon Water-Quality Results
  • Plate 20 Summary of Semi-Volatile Organic Compounds Soil-Quality Results
  • Plate 21 Summary of Semi-Volatile Organic Compounds Water-Quality Results
  • Plate 22 Distribution of Peak Halogenated Volatile Organic Compound Concentrations
  • Plate 23 Summary of Halogenated Volatile Organic Compounds Water-Quality Results
  • Plate 24 Summary of Aromatic Volatile Organic Compound Water-Quality Results
  • Plate 25 Distribution of Peak Polychlorinated Biphenyl Concentrations
  • Plate 26 Thickness of RDEC Compliant Materials
  • Plate 27 Extent of Pollutant Mobility Criteria Exceedance
• Appendices

Request for Modification to Sampling Plan and Addendum, Supplemental Scope of Study, Former New Haven Water Company Property, Hamden, Connecticut (February 2, 2005)

Clarification and Additional Information for Dioxin, Sampling Modification identified in December 14, 2004, Request for Modification to Sampling Plan and Addendum to April 16, 2004 (January 18, 2005)

• Plate 1
• Table 1A

Request for Modification to Sampling Plan and Addendum
Supplemental Scope of Study, Former New Haven Water Company Property, Hamden, Connecticut (January, 2005)

Request for Modification to Sampling Plan and Addendum
to April 16, 2004 Supplemental Scope of Study, Former New Haven Water Company Property, Middle School Site, Hamden, Connecticut (December 14, 2004)

• Plate 1
• Plate 2
• Table 1
• Table 2

Sampling and Analysis Requirements for Dioxins and Furans December 1, 2004)

Modification to Supplemental Scope of Study (October 6, 2004)

Request for Modification to Sampling Plan (August 5, 2004)

Supplemental Scope of Study (July 2004)

• Response to Comments

Conditional Approval Letter, Hamden Middle School (July 2004)

Addendum and Modification to April 16, 2004 “Supplemental Scope Of Study, Former New Haven Water Company Property, Hamden Connecticut” (June 28, 2004)

• Cover letter
• Attachment 1: references
• Attachment 2: updated tables
• Attachment 3: testing equipment

Work Plan Summary (April 2004)

Supplemental Scope Of Study, Phase III Environmental Site Investigation (April, 2004)

• Figures
• Historical Tables, Appendix IV
• Plates
• Tables
• Response to Comments

Phase III Environmental Site Investigation, Former New Haven Water Company Property, Hamden, Connecticut, Volumes 1 - 5 (December 2002)

• Summary
• Disapproval Letter (March 2004)
• Figures (1.8MB PDF file)
• Tables (1MB PDF file)
• Plates (20MB PDF file)

Draft Public Health Assessment: Evaluation of Soil, Groundwater, Soil Gas and Indoor Air Data, Hamden Middle School, Hamden, Connecticut (September 2003)

• Summary

Revised Hamden Middle School Plan (July 2002)

Fact Sheet: Environmental Hazards at Hamden Middle School (March 2001)