1. Preliminary Assessment of Potomac Yard, Prepared by Donald Spell, Commonwealth of Virginia, Department of Waste Management, 4/19/88

POTQMAC YARD ENFORCEMENT REMOVAL ADMINISTRATIVE RECORD FILE * INDEX OF DOCUMENTS

I. ENFORCEMENT DOCUMENTS 1. Preliminary Assessment of Potomac Yard, prepared by Donald Spell, Commonwealth of Virginia, Department of Waste Management, 4/19/88. P. 100001-100118. 2. Draft Sampling and Analysis Plan for the Potomac Yard Site, Alexandria, Virginia, prepared by Hydrosysterns, Inc., 9/28/88. P. 100119-100162. 3. Site Investigation of Potomac Yard, prepared by Donald R. Spell, Commonwealth of Virginia, Department of Waste Management, 2/28/89. P. 100163-100558. 4. Environmental Assessment Report, Northern Portion of Potomac Yard, Alexandria, Virginia, 2/6/90. P. 100559- 100750. 5. Draft Environmental Assessment for Seven Areas at Potomac Yard, Alexandria, Virginia, prepared by Hydrosystems, Inc., 8/19/91. P. 100751-100796. 6. Letter to Mr. Morris Orens, Shereff, Friedman, Hoffman, and Goodman, from Mr. Steven A. Dielman and Ms. Joyce S. Schlesinger, Environ Corporation, re: Assessment of potential environmental liability posed by surface and subsurface contamination at Potomac Yard, 8/27/91. P. 100797-100873. The following are attached:. a) a map entitled "Potomac Yard Site Location and Southern Portion Areas of Environmental Concern;" b) Section I, Southern Portion Soils; c) Attachment 1, Estimation of Potential Environmental Liability; d) Chapter 1.0 - Introduction;

Administrative Record File available 9/15/92, updated 9/25/92, 12/15/92, 4/24/95, 9/21/95, 9/28/95, 10/20/95, 7/24/96, 9/19/97, 3/5/99, and 8/31/99. e) Appendix A, Calculations Of Contaminant Concentrations In The Potomac River Based On Site Runoff; f) Appendix B, Calculation of Total PNA's; g) Appendix C, Dose Calculations; h) a letter dated March 22, 1990 concerning an analysis of Hydrosysterns, Inc.'s Feasibility Study. 7. Site Characterization Report, Site Investigation of Diesel Fuel Contamination, Potomac Yard, Alexandria, Virginia, prepared by Hydrosystems, Inc., 11/22/91. P. 100874-101043. A transmittal letter is attached. 8. Letter to Ms. Lourdes Rodrigues, U.S. EPA, from Ms. Susan H. Buffington, RF&P Railroad Company (RF&P), re: Response to inquiry concerning the relationship between RF&P Railroad, RF&P Corporation and the Virginia Retirement System as it relates to the ownership and operation of Potomac Yard, 7/24/92. P. 101044-101045. 9. Contamination Investigation Plan, prepared by Environmental Technology of North America, Inc., 7/28/92. P. 101046-101316. 10. Administrative Order By Consent In The Matter Of: The Potomac Yard Site. Richmond, Fredericksburg and Potomac Railroad Company, Respondent, Docket No. III- 92-61-DC, 9/22/92. P. 101317-101348. 11. U.S. EPA Public Notice, re: Availability of the Administrative Record for the Potomac Yard Site, 11/12/92. P. 101349-101349. 12. Report: "Errata" Work Plan for Extent of Contamination. Study of Potomac Rail Yard Site, prepared by Haliburton NUS Environmental Corporation, 12/23/92. P. 101350-101866. A cover letter is attached. 13. Letter to Mr. Christopher Moses, Earth Tech Remediation Services, Inc. (ETI), from Mr. Christopher P. Thomas, U.S. EPA, re: Completion of EPA's review of the revised ETI work plan for the Extent of Contamination Study, 3/8/93. P. 101867-101870. 14. Amendment to Administrative Order By Consent In The Matter Of: The Potomac Yard Site, Docket No. 111-92- 61-DC, 1/24/94. P. 101871-101876. 15. Letter to Mr. Scott Slagley, RF&P Corporation, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Confirmation of several proposed sampling issues at the site, 3/17/94. P. 101877-101879. 16. Letter to Mr. Scott Slagley, RF&P Corporation, from Mr. Jeffrey A. Dodd, U.S. EPA, re: EPA's disapproval of RF&P's work plan, 3/31/94. P. 101880-101896. 17. Response to EPA's comments dated March 31, 1994, (undated). P. 101897-102193. 18. Letter to Mr. Scott Slagley, RF&P Corporation, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Transmittal of additional comments on the work plan addendum, 4/22/94. P. 102194-102201. 19. Letter to Mr. Scott Slagley, RF&P Corporation, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Transmittal of additional comments, prepared by the National Oceanic and Atmospheric Administration (NOAA), to the work plan addendum, 4/29/94. P. 102202-102204. 20. Letter to Ms. Vibeke Lindblom, Alexandria Sanitation Authority, from Ms. Kathy Thomas, Environmental Technology of North America, Inc., re: Request for permission to discharge 250 gallons of groundwater into the Alexandria sanitary sewer, 5/26/94. P. 102205- 102207. The groundwater sampling data is attached. 21. Letter to Mr. Jeffrey Dodd, U.S. EPA, from Mr. Chuck Flippo, Environmental Technology of North America Inc., re: Transmittal of a copy of the Work Plan for Removal of North, Middle, and South Ponds at Potomac Greens, 6/8/94. P. 102208-102231. A copy of the work plan and a letter dated November 30, 1993, concerning the oil/water separator removal, are attached. 22. Letter to Mr. Scott Slagley, RF&P Corporation, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Disapproval of the revised Work Plan Addendum, 7/8/94. P. 102232-102295. The Environmental Risk Assessment Guidelines are attached. 23. Letter to Mr. Scott Slagley, RF&P Corporation, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Continuing deficiencies in the revised work plan prepared by RF&P, 10/25/94. P. 102296-102328. A report dated July 27, 1994, entitled Region III Interim Ecological Risk Assessment Guidelines and Attachment Ar entitled Data Presentation, are attached. 24. Letter to Mr. Bob Davis, U.S. EPA, from Ms. Judi L. Durda, Weinberg Consulting Group, re: Evaluating ecological exposures on a sample-point-specific basis for each potential ecological exposure point, 11/1/94. P. 102329-102330. 25. Letter to Mr. Jeffrey Dodd, U.S. EPA, from Mr. Chuck Flippo, Environmental Technology of North America, re: Request for clarifications of certain modifications to the work plan addendum presented in EPA's October 25, 1994 letter, 11/7/94. P. 102331-102333. A table entitled EPA Region III Risk-Based Concentrations is attached. 26. Letter to Ms. Judi L. Durda, Weinberg Consulting Group Inc., from Mr. Robert S. Davis, U.S. EPA, re: Comments indicating EPA's position concerning contamination levels, 11/9/94. P. 102334-102334. 27. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: EPA's response to several issues concerning additional sampling at the site, 11/10/94. P. 102335-102335. 28. Letter to Mr. Jeffrey Dodd, U.S. EPA, from Mr. Chuck Flippo, Environmental Technology of North America, Inc., re: Transmittal of documents required for approval of the modified Extent of Contamination Study Work Plan Addendum, 11/23/94. P. 102339-102563. The following are attached: a) revised Appendix 0, Definition of Grid Systems; b) Attachment 3, Future Use Information For Risk Assessment; c) Attachment A, 1989 aerial photograph of site and surrounding area; d) Attachment B, documentation on installation of drinking water wells in Arlington and Alexandria; e) Attachment C, census data; f) Attachment D, small area plan chapter of City of Alexandria Master Plan, zoning ordinance No. 3604, and section 5-600 Alexandria Coordinated Development District Guidelines/Ordinances; g) Attachment E, Arlington County General Land Use Plan; h) Attachment F, development plans and supporting information and drawings; i) Attachment 4, Technical services division field sample work sheet;

j) Attachment 5, Appendix P; k) Attachment 6, revised ECS schedule. 29. Letter to Mr. Scott Slagley, RF&P Corporation, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Biological Technical Assistance Group's continued reservations about the ecological risk assessment, 1/27/95. P. 102564-102573. 30. Letter to Channing J. Martin, Williams/ Mullen, Christian, and Dobbins, from Mr. Thomas C. Voltaggio, U.S. EPA, re: EPA's addressing the concerns about the implementation of the Administrative Order on Consent, 1/30/95. P. 102574-102590. The U.S. EPA's comments on the Contamination Investigation Plan are attached. 31. Report: Extent of Contamination Study for Potomac Yard. Alexandria, Virginia/Volume I, Text and Tables, prepared by Environmental Technology of North America, Inc. (ETI), 5/24/95. P. 102591-102981. 32. Report: Extent of Contamination Study for Potomac Yard, Alexandria, Virginia/Volume II, Figures, prepared by ETI, 2/22/95. P. 102982-103050. 33. Report: Extent of Contamination Study for Potomac Yard, Alexandria, Virginia/Volume III, Plates, prepared by ETI, 2/22/95. P. 103051-103075. 34. Report: Extent of Contamination Study for Potomac Yard, Alexandria, Virginia/Volume IV. Analytical Data, prepared by Environmental Technology of North America, Inc., 5/24/95. P. 103076-103381. 35. Report: Extent of Contamination Study for Potomac Yard. Alexandria, Virginia/Volume V, Appendices A-H. prepared by Environmental Technology of North America, Inc., 5/24/95. P. 103382-103869. 36. Report: Extent of Contamination Study for Potomac Yard, Alexandria. Virginia/Volume VI. Appendices I-W, prepared by Environmental Technology of North America, Inc., 2/22/95. P. 103870-104290. 37. Report: Extent of Contamination Study for Potomac Yard, Alexandria, Virginia/Volume VII. Appendices X-Z, prepared by Environmental Technology of North America, Inc., 5/24/95. P. 104291-104850. 38. Report: Potomac Yard Environmental Activities Supplemental Information, prepared by Environmental Technology of North America, Inc., 7/31/95. P. 104851-105000. 39. Letter to Mr. Scott Slagley, RF&P Corporation, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Notification of EPA's disapproval of the Extent of Contamination Study, EPA's comments are included, 4/28/95. P. 105001-105011. 40. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Additional comments concerning the Extent of Contamination Study, 5/11/95. P. 105012- 105018. 41. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Conditional approval of the Extent of Contamination Study, 6/22/95. P. 105019-105020. 42. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Scott Slagley, RF&P, re: Summary of a conference call concerning the use of groundwater at the site as a potential drinking source, 7/13/95. P. 105021-105025. An excerpt from a paper on groundwater resources is attached.

43. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Chuck Flippo, Environmental Technology of North America, Inc., re: Transmittal of the RF&P's responses in compliance with EPA's conditional approval of the Extent of Contamination Study, 7/24/95. P. 105026- 105073. The responses and a map of the site are attached. 44. Report: Human Health and Ecological Risk Assessment/ Potomac Yard, prepared by Weinberg Consulting Group, Inc., 8/21/95. P. 105074-105268. A transmittal letter and a series of tables providing a summary of responses to EPA's comments are attached. 45. Report: Human Health and Ecological Risk Assessment/ Potomac Yard. Appendices A-N. prepared by Weinberg Consulting Group, Inc., 8/21/95. P. 105269-105768. 46. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: EPA's final approval of the Extent of Contamination Study, 9/19/95. P. 105769-105769. 47. Report: Human Health Risk Assessment and On-Site Ecological Risk Assessment, prepared by Weinberg Consulting Group, Inc., 10/13/95. P. 105770-105941. A transmittal letter is attached. 48. Report: Human Health Risk Assessment and On-Site Ecological Risk Assessment/Appendices A-N, prepared by Weinberg Consulting Group, Inc., 10/13/95. P. 105942- 106410.

49. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Notification of EPA's disapproval of the Human Health and Ecological Risk Assessment and a list of deficiencies for that report, 9/22/95. P. 106411-106418. 50. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Scott Slagley, RF&P, re: Transmittal of a summary of comments concerning the Human Health and Ecological Risk Assessment, 9/29/95. P. 106419-106423. The summary is attached. 51. Memorandum to Mr. Thomas C. Voltaggio, U.S. EPA, from Mr. Jeffrey A. Dodd, U.S. EPA, re: A request for approval to conduct an engineering evaluation/cost analysis for removal action at the Potomac Yard Site, 10/6/95. P. 106424-106435. The signed approval page is attached. 52. Letter to Mr. Scott Slagley, RF&P Corporation, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Approval of the Human Health and On-Site Ecological Risk Assessment, 10/13/95. P. 106436-106437.

53. Progress Report for the Potomac Yard Site, April 23, 1993, through April 30, 1993, prepared by Environmental Technology of North America, Inc. (ETI), 5/6/93. P. 106438-106442. A May 6, 1993, transmittal letter is attached.

54. Progress Report No. 2 for the Potomac Yard Site, May 1, 1993, through May 14, 1993, prepared by ETI, 5/19/93.P. 106443-106544. A May 19, 1993, transmittal letter is attached.

55. Progress Report No. 3 for the Potomac Yard Site, May 15, 1993, through May 28, 1993, prepared by ETI, 6/3/93. P. 106545-106864. A June 3, 1993, transmittal letter is attached.

56. Progress Report No. 4 for the Potomac Yard Site, May 29, 1993, through June 11, 1993, prepared by ETI, 6/16/93. P. 106865-106868. A June 16, 1993, transmittal letter is attached.

57. Progress Report No. 5 for the Potomac Yard Site, June 12, 1993, through June 18, 1993, prepared by ETI, 6/30/93. P. 106869-106872. A June 30, 1993, transmittal letter is attached. 58. Progress Report No. 6 for the Potomac Yard Site, June 19, 1993, through July 2, 1993, prepared by ETI, 7/14/93. P. 106873-106876. A July 14, 1993, transmittal letter is attached. 59. Progress Report No. 7 for the Potomac Yard Site, July 3, 1993, through July 16, 1993, prepared by ETI, 7/16/93. P. 106877-107466.

60. Progress Report No. 8 for the Potomac Yard Site, July 17, 1993, through July 30, 1993, prepared by ETI, 8/12/93. P. 107467-107470. An August 12, 1993, transmittal letter is attached.

61. Progress Report No. 9 for the Potomac Yard Site, July 31, 1993, through August 13, 1993, prepared by ETI, 8/25/93. P. 107471-107479. An August 25, 1993, transmittal letter is attached.

62. Progress Report No. 10 for the Potomac Yard Site, August 14, 1993, through August 27, 1993, prepared by ETI, 9/8/93. P. 107480-107484. A September 8, 1993, transmittal letter is attached. 63. Progress Report No. 11 for the Potomac Yard Site, August 28, 1993, through September 10, 1993, prepared by ETI, 9/22/93. P. 107485-107489. A September 22, 1993, transmittal letter is attached.

64. Progress Report No. 12 for the Potomac Yard Site, September 11, 1993, through September 24, 1993, prepared by ETI, 10/6/93. P. 107490-107564. An October 6, 1993, transmittal letter is attached.

65. Progress Report No. 13 for the Potomac Yard Site, September 24, through October 8, 1993, prepared by ETI, 10/21/93. P. 107565-107590. An October 21, 1993, transmittal letter is attached.

66. Progress Report No. 14 for the Potomac Yard Site, October 9, 1993, through October 22, 1993, prepared by ETI, 11/3/93. P. 107591-107594. A November 3, 1993, transmittal letter is attached.

67. Progress Report No. 15 for the Potomac Yard Site, October 23, 1993, through November 5, 1993, prepared by ETI, 11/17/93. P. 107595-107599. A November 17, 1993, transmittal letter is attached.

68. Progress Report No. 16 for the Potomac Yard Site, November 6, 1993, through November 19, 1993, prepared by ETI, 12/1/93. P. 107600-107660. A December 1, 1993, transmittal letter is attached. 69. Letter to Mr. Jay Green, Department of Environmental Quality, from Mr. Kenneth M. Lyons, ETI, re: Transmittal of the free product removal reports for the site, 12/6/93. P. 107661-107664.

70. Progress Report No. 17 for the Potomac Yard Site, November 20, 1993, through December 3, 1993, prepared by ETI, 12/15/93. P. 107665-107668. A December 15, 1993, transmittal letter is attached.

71. Progress Report No. 18 for the Potomac Yard Site, December 4, 1993, through December 17, 1993, prepared by ETI, 12/29/93. P. 107669-107676. A December 29, 1993, transmittal letter is attached.

72. Progress Report No. 19 for the Potomac Yard Site, December 18, 1993, through December 31, 1993, prepared by ETI, 1/12/94. P. 107677-107680. A January 12, 1994, transmittal letter is attached. 73. Progress Report No. 20 for the Potomac Yard Site, January 1, 1994, through January 14, 1994, prepared by ETI, 1/26/94. P. 107681-107684. A January 26, 1994, transmittal letter is attached.

74. Progress Report No. 21 for the Potomac Yard Site, January 15, 1994, through January 28, 1994, prepared by ETI, 2/9/94. P. 107685-107688. A February 9, 1994, transmittal letter is attached.

75. Progress Report No. 22 for the Potomac Yard Site, January 29, 1994, through February 28, 1994, prepared by ETI, 3/11/94. P. 107689-107692. A March 11, 1994, transmittal letter is attached.

76. Progress Report No. 23 for the Potomac Yard Site, March 1, 1994, through March 31, 1994, prepared by ETI, 4/13/94. P. 107693-107695. An April 13, 1994, transmittal letter is attached.

77. Progress Report No. 24 for the Potomac Yard Site, April 1, 1994, through April 30, 1994, prepared by ETI, 5/12/94. P. 107696-107702. A May 12, 1994, transmittal letter is attached.

10 78. Progress Report No. 25 for the Potomac Yard Site, May I, 1994, through May 31, 1994, prepared by ETI, 6/14/94. P. 107703-107821. A June 14, 1994, transmittal letter is attached. 79. Progress Report No. 26 for the Potomac Yard Site, June 1, 1994, through June 30, 1994, prepared by ETI, 6/30/94. P. 107822-107829.

80. Progress Report No. 27 for the Potomac Yard Site, July 1, 1994, through July 30, 1994, prepared by ETI, 8/12/94. P. 107830-1077838. An August 12, 1994, transmittal letter is attached.

81. Progress Report No. 28 for the Potomac Yard Site, August 1, 1994, through August 31, 1994, prepared by ETI, 9/13/94. P. 107839-107847. A September 13, 1994, transmittal letter is attached. 82. Progress Report No. 29 for the Potomac Yard Site, September 1, 1994, through September 30, 1994, prepared by ETI, 9/30/94. P. 107848-107850.

83. Progress Report No. 30 for the Potomac Yard Site, October 1, 1994, through October 31, 1994, prepared by ETI, 11/13/94. P. 107851-107858. A November 13, 1994, transmittal letter is attached.

84'. Progress Report No. 31 for the Potomac Yard Site, November 1, 1994, through November 30, 1994, prepared by ETI, 12/13/94. P. 107859-107867. A December 13, 1994, transmittal letter is attached.

85. Progress Report No. 32 for the Potomac Yard Site, December 1, 1994, through December 31, 1994, prepared by ETI, 1/13/95. P. 107868-107871. A January 13, 1995, transmittal letter is attached.

86. Progress Report No. 33 for the Potomac Yard Site, January 1, 1995, through January 31, 1994, prepared by ETI, 2/13/95. P. 107872-107880. A February 13, 1995, transmittal letter is attached.•

87. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Scott Slagley, RF&P, re: Notification of agreement to comply with the U.S. EPA directives for Extent of Contamination Study Work Plan Addendum, 2/17/95. P. 107881-107882.

11 88. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Chuck Flippo, ETI, re: Transmittal of documents and information required by U.S. EPA's letter of January, 27, 1995, on behalf of Mr. Scott Slagley, 2/27/95. P. 107883-107899. The following are attached:

a) a revised plate of soil testing results at the site;

b) documentation on the installation of drinking water wells;

c) an excerpt from Commonwealth of Virginia Private Well Regulations;

d) a revised Technical Services Division field sampling worksheet;

e) documentation of preservatives used in water sampling.

89. Progress Report No. 34 for the Potomac Yard Site, February 1, 1995, through February 28, 1995, prepared by ETI, 3/13/95. P. 107900-107911. A March 13, 1995, transmittal letter is attached.

90. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. William J. Skrabak, Alexandria Health Department, re: Comments on the Draft Extent of Contamination Study for the site, 4/10/95. P. 107909-107911.

91. Progress Report No. 35 for the Potomac Yard Site, March 1, 1995, through March 31, 1995, prepared by ETI, 4/13/95. P. 107912-107920. An April 13, 1995, transmittal letter is attached.

92. Progress Report No. 36 for the Potomac Yard Site, April 1, 1995, through April 30, 1995, prepared by ETI, 5/12/95. P. 107921-107929. A May 12, 1995, transmittal letter is attached.

93. Memorandum to Ms. Joan S. Dollarhide, U.S. EPA, from Mr. Roy L. Smith, U.S. EPA, re: Request for review of arsenic speciation and potential gastrointestinal (GI) absorption from site-specific soil, 5/30/95. P. 107930-107944.

12 94. Progress Report No. 37 for the Potomac Yard Site, May 1, 1995, through May 31, 1995, prepared by ETI, 6/13/95. P. 107945-107951. A June 13, 1995, transmittal letter is attached.

95. Memorandum to Mr. Jeffrey A. Dodd, U.S. EPA, from Ms. Patricia Flores, U.S. EPA, re: Review of the emissions and dispersion modeling analysis for the site, 7/12/95. P. 107952-107952.

96. Progress Report No. 38 for the Potomac Yard Site, June 1, 1995, through June 30, 1995, prepared by ETI, 7/13/95. P. 107953-107959. A July 13, 1995, transmittal letter is attached.

97. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Scott A. Slagley, RF&P, re: Summary of information presented in a July 7, 1995, conference call which dealt with potential use of ground water beneath the site as a drinking source, 7/13/95. P. 107960-107964. A table of regional well depths versus yields is attached.

98. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: U.S. EPA disapproval of the June 7, 1995, human health risk assessment, and request for revision, 7/17/95. P. 107965-107973.

99. Letter to Mr, Jeffrey A. Dodd, U.S. EPA, from Mr. Scott Slagley, RF&P, re: Request for an extension of time to respond to U.S. EPA's comments on the human health and ecological risk assessment, 8/10/96. P. 107974-107974.

100. Progress report No. 39 for the Potomac Yard Site, July, 1, 1995, through July 31, 1995, prepared by ETI, 8/13/95. P. 107975-107981. An August 13, 1995, transmittal letter is attached.

101. Letter to Ms. Judi Durda, Weinberg Consulting Group, Inc. from Mr. Robert S. Davis, U.S. EPA, re: Follow - up to telephone conversation explaining U.S. EPA potential risk tables and how they are used in the evaluation process, 8/23/95. P. 107982-107984.

102. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Scott Slagley, RF&P, re: Request for clarification of U.S. EPA guidelines, 9/11/95. P. 107985-107986.

13 103. Progress report No. 40 for the Potomac Yard Site, August 1, 1995, through August 31, 1995, prepared by ETI, 9/13/95. P. 107987-107993. A September 13, 1995, transmittal letter is attached.

104. Report: Summary of Aareements Reached between U.S. EPA and RF&P Railroad Company Durina Meetina on September 26, 1995, Reaardina Finalization of the On-Site Ecoloaical Risk Assessment for the Potomac Yard Site, Arlinaton/Alexandria, Virginia, prepared by RF&P, 9/29/95. P. 107994-107998. A September 29, 1995, transmittal letter is attached.

105. Progress report No. 41 for the Potomac Yard Site, September 1, 1995, through September 30, 1995, prepared by ETI, 10/13/95. P. 107999-108008. An October 13, 1995, transmittal letter is attached.

106. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Scott A. Slagley, RF&P, re: Request for off-site sampling requirements to be separated from the Engineering Evaluation/Cost Analysis (EE/CA) in order to expedite its submission, 10/20/95. P. 108009-108010.

107. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Ms. Jennifer Payne, ETI, re: Transmittal of Errata IV list regarding table 1-1 for the revised extent of contamination study, 10/26/95. P. 108011-108015. The Erratta IV list and revised table 1-1 are attached.

108. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: U.S. EPA approval of request to separate off-site sampling requirements from the EE/CA, 10/31/95. P. 108016-108017.

109. U.S. EPA Extent of Contamination Study Fact Sheet for the Potomac Yard Site, prepared by U.S. EPA, 11/95. P. 108018-108023.

110. U.S. EPA Engineering Evaluation/Cost Analysis (EE/CA) Fact Sheet for the Potomac Yard Site, prepared by U.S. EPA, 11/95. P. 108024-108025.

111. U.S. EPA Baseline Human Health and Ecological Risk Assessment Fact Sheet for the Potomac Yard Site, prepared by U.S. EPA, 11/95. P. 108026-108028.

14 112. Progress report No. 42 for the Potomac Yard Site, October 1, 1995, through October 31r 1995, prepared by ETI, 11/13/95. P. 108029-108035. A November 13, 1995, transmittal letter is attached.

113. Letter to Mr. Steven Krai, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Denial of request to extend public comment period, 11/14/95. P. 108036-108037.

114. Letter to Mr. Robert Davis, U.S. EPA, from Ms. Judi L. Durda, The Wienberg Group, Inc., re: Request for sediment sampling work plan information, 11/17/96. P. 108038-108038.

115. Letter to Ms. Judi L. Durda, The Weinberg Group, Inc., from Mr. Robert S. Davis, U.S. EPA, re: Transmittal of background information from the Dupont-Newport site, 11/27/96. P. 108039-108056. The following are attached:

a) a list of basic surface water and sediment parameters;

b) excerpts from the Dupont-Newport RI/FS work plan;

c) a November 17, 1995, letter requesting inclusion of additional testing in the work plan;

d) a graph of distribution of sediment contamination enrichment factors for metals in the Christina River.

116. Progress report No. 43 for the Potomac Yard Site, November 1, 1995, through November 3, 1995, prepared by ETI, 12/13/95. P. 108057-108063. A December 13, 1995, transmittal letter is attached.

117. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Scott A. Slagley, RF&P, re: Request for extension of time to submit the work plan for off-site risk assessment, 12/14/95. P. 108064-108064.

118. Letter to Mr. Scott Slagley, RF&P Corporation, Mr. Jeffrey A. Dodd, U.S. EPA, re: Approval of request for extension of time to submit the work plan for off-site risk assessment, 12/15/95. P. 108065-108065.

15 119. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. William J. Skrabak, Alexandria Health Department, re: Comments on the draft EE/CA work plan, 12/21/95. P. 108066-108071.

120. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Scott A. Slagley, RF&P, re: Request for EPA concurrence that no off-site removal actions will be necessary for the Slaters Lane area of the site, 12/21/95. P. 108072- 108072.

121. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Notification of EPA disapproval of the EE/CA with supporting comments, 12/22/95. P. 108073-108082.

122. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: EPA's determination that removal actions at the Slaters Lane area of the site are unnecessary, 12/29/95. P. 108083-108084.

123. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Scott A. Slagley, RF&P, re: Request for a meeting with EPA, 1/9/96. P. 108085-108086.

124. Progress report No. 44 for the Potomac Yard Site, December 1, 1995, through December 31, 1995, prepared by ETI, 1/12/96. P. 108087-108093. A January 12, 1996, transmittal letter is attached.

125. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Notification of a meeting date and approval of an extension of time to respond to EPA comments, 1/17/96. P. 108094-108094.

126. Letter to Mr. Scott A. Slagley, RF&P, from Ms. Joan C. Becker Kelsch, Arlington County, Virginia Department of Environmental Services, re: Comments on the draft work plan for off-site ecological risk assessment, 1/19/96. P. 108095-108096.

127. Memorandum to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Roy L. Smith, U.S. EPA, re: Final National Center for Environmental Assessment (NCEA) evaluation of RF&P!s site specific study of arsenic absorption, 1/23/96. P. 108097-108097.

16 128. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: NCEA evaluation of the site- specific study of arsenic uptake, 1/26/96. P. 108098- 108121. A January 16, 1996, memorandum, a November 13, 1995, transmittal memorandum, and NCEA review of arsenic speciation and potential GI absorption from site-specific soil are attached.

129. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. William J. Skrabak, Alexandria Health Department, re: Comments on the draft work plan of the off-site ecological risk assessment, and transmittal of comments from the City of Arlington's environmental consultant, 1/30/96. P. 108122-108125. A January 24, 1996, memorandum regarding comments on the draft work plan for off-site ecological risk assessment at the site is attached.

130. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: EPA disapproval of and comments on the draft work plan for off-site ecological risk assessment, 2/9/96. P. 108126-108143.

131. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Scott A. Slagley, RF&P, re: Notification that RF&P is still waiting on a response to a specific comment from EPA, and request for an extension of time to submit the revised EE/CA, 2/13/96. P. 108144-108144.

132. Letter to Mr, Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Approval of request for extension of time to submit the EE/CA, 2/14/96. P. 108145- 108145.

133. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: EPA response to the unanswered comment on the EE/CA, 2/22/96. P. 108146-108147.

134. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Channing J. Martin, Williams, Mullen, Christian & Dobbins, re: RF&P's concerns about EPA's comments on the off-site ecological risk assessment, request for a meeting to discuss those concerns, and request for an extension of time to respond to the comments, 2/26/96. P. 108148- 108150.

17 135. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Scott A. Slagley, RF&P, re: RF&P's concerns with EPA's desire to incorporate a total metals analysis into the storm water monitoring program portion of the EE/CA, 2/29/96. P. 108151-108152.

136. Progress report No. 46 for the Potomac Yard Site, February 1, 1996, through February 29, 1996, prepared by ETI, 3/13/96. P. 108153-108159. A March 13, 1996, transmittal letter is attached.

137. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. William J. Skrabak, Alexandria Health Department, re: Comments on the revised draft EE/CA, 3/19/96. P. 108160-108162.

138. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Ms. Jennifer Payne, ETI, re: Request for extension of time to submit the revised work plan for off-site ecological risk assessment due to several unresolved issues between RF&P and EPA, 3/20/96. P. 108163-108163.

139. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: EPA's approval of RF&P's request for an extension of time to submit the revised work plan for off-site ecological risk assessment until after all issues have been resolved, 3/28/96. P. 108164-108164.

140. Progress report No. 47 for the Potomac Yard Site, March 1, 1996, through March 31, 1996, prepared by ETI, A/12/96. P. 108165-108172. An April 12, 1996, transmittal letter is attached.

141. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Conditional approval of the draft EE/CA, 4/17/96. P. 108173-108181.

142. Progress report No. 48 for the Potomac Yard Site, April 1, 1996, through April 30, 1996, prepared by ETI, 5/13/96. P. 108182-108188. A May 13, 1996, transmittal letter is attached.

18 143. Letter to Mr. Thomas C. Voltaggio, U.S. EPA, from Channing J. Martin, Williams/ Mullen, Christian & Dobbins, re: RF&P's belief that it is unnecessary to undertake sampling at the Potomac Greens drainage ditches as part of the off-site risk assessment, and request to discuss the matter with EPA, 5/23/96. P. 108189-108191.

144. Progress report No. 49 for the Potomac Yard Site, May 1, 1996, through May 31, 1996, prepared by ETI, 6/13/96. P. 108192-108198. A June 13, 1996, transmittal letter is attached.

145. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Ms. Patricia McMurray, Commonwealth of Virginia Department of Environmental Quality, re: Transmittal of comments on the final EE/CA, 6/17/96. P. 108199-108203. The comments are attached.

146. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: EPA approval of the final EE/CA pending certain modifications, 6/17/96. P. 108204- 108208.

147. Report: Final Engineering Evaluation/Cost Analysis, Potomac Yard Site, prepared by ETI, 6/19/96. P. 108209-108401. A June 21, 1996, transmittal letter is attached.

148. Letter to Channing J. Martin, Williams, Mullen, Christian & Dobbins, from Mr. Thomas C. Voltaggio, U.S. EPA, re: EPA's determination that sampling of the Potomac Greens drainage ditches must be included in the off-site risk assessment, 7/1/96. P. 108402-108404.

149. Report: Community Relations Plan, Potomac Yards Site, prepared by Dynamac Corporation, 7/17/96. P. 108405- 108458.

150. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. William J. Skrabak, Virginia Department of Health, re: Comments on the Extent of Contamination Study and the Human Health Segment of the Risk Assessment, 10/27/95. P. 108459-108460.

19 151. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Scott Slagley, RF&P, re: Incomplete Virginia Pollutant Discharge Elimination System, (VPDES), and transmittal of the corrected VPDES, General Permit Coverage for Potomac Yard, 7/19/96. P. 108461-108510. The following are attached:

a) a letter to Mr. Jeffrey Dodd dated June 27, 1996;

b) a copy of the Storm Water Pollution Prevention Plan (SPPP);

c} a letter to Mr. Denton U. Kent dated May 21, 1996; and

d} a copy of General Permit For Storm Water Discharges From Construction Sites.

152. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Ms. Patricia McMurray, Commonwealth of Virginia, re: Transmittal of comments on the SPPP, 8/8/96. P. 108511-108513.

153. Memorandum to Ms. Lisa Brown, U.S. EPA, from Pat Miller, The Avenue Partnerships, re: Request for a 60 day extension of the comment period and public meeting, 8/9/96. P. 108514-108514.

154. Memorandum to Ms. Lisa Brown, U.S. EPA, from Ms. Joyce Doherty, resident, re: Request for a 60 day extension of the comment period and public meeting, 8/9/96. P. 108515-108515.

155. Letter to Ms. Lisa Brown, U.S. EPA, from Ms. Marilyn Doherty, resident, re: Request for a 60 day extension of the comment period and public meeting to explain EE/CA recommendations, 8/13/96. P. 108516-108516.

156. Progress Report No. 51, for the Potomac Yard Site, July 1, 1996, through July 31, 1996, prepared by Earth Tech Remediation Services, 8/13/96. P. 108517-108527. An August 13, 1996, transmittal letter is attached.

157. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: EPA and Virginia Department of Health comments on the SPPP, 8/14/96. P. 108528- 108529.

20 158. Letter to Ms. Marilyn Doherty, resident, from U.S. EPA, re: Response to request for 60 day extension to the public comment regarding EE/CA, 8/21/96. P. 108530- 108530.

159. Letter to Ms. Joyce Doherty, resident, from U.S. EPA, re: Response to request for 60 day extension to the public comment regarding EE/CA, 8/21/96. P. 108531- 108531.

160. Letter to Pat Miller, The Avenue Partnerships, from Mr. Jefferey A. Dodd, U.S. EPA, re: Response to request for 60 day extension to the public comment regarding EE/CA, 8/21/96. P. 108532-108533.

161. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Modifications to the revised draft Off-Site Ecological Risk Assessment Work Plan (OERAWP), 8/26/96. P. 108534-108536.

162. Letter to Mr, Jeffrey A. Dodd, U.S. EPA, from Mr. Christopher K. Moses, Earth Tech Remediation Services, re: Revised schedule for the OERAWP, 8/30/96. P. 108537-108539. A copy of the schedule is attached.

163. Report: Sampling Plan for Potomac Yard Site, prepared by Roy F. Weston (Weston), 8/30/96. P. 108540-108548. A transmittal letter dated September 5, 1996, is attached.

164. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Christopher J. Lupia, Christopher Consultants Ltd., re: Response to EPA and Virginia Department of Environmental Quality (VDEQ), comments on the SPPP for track relocation, 9/11/96. P. 108549-108643. A Contingency Plan marked as Attachment 1, and a revised Potomac Track Relocation Construction Pollution Prevention Plan, are attached.

165. Letter to Mr. Tom Faha, VDEQ, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Transmittal of sediment and surface water data collected from the Potomac Yard Site, 9/12/96. P. 108644-108645. The sediment and surface water data are not attached.

21 166. Progress Report No. 52, for the Potomac Yard Site, August 1, 1996, through August 31, 1996, prepared by Earth Tech Remediation Services, 9/13/96. P. 108646- 108653. A September 13, 1996, transmittal letter is attached.

167. U.S. EPA Public Notice, Potomac Yard Site, re: EPA to Hold Public Meeting on the Engineering Evaluation/Cost Analysis for the Potomac Yard Site, held at Cora Kelly Recreation Center 9/18/96. P. 108654-108654.

168. Transcript of September 18, 1996, public meeting concerning Potomac Yard Site, held at Cora Kelly Recreation Center, Alexandria, Virginia. P. 108655- 108710.

169. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Scott A. Slagley, RF&P, re: Revised design of the storm water management system from Potomac Yard, 10/8/96. P. 108711-108713. A map of the new storm water design is attached.

170. Letter to Mr. Christopher J. Lupia, Christopher Consultants, Ltd., from Ms. Patricia McMurray, Commonwealth of Virginia, re: Responses to VDEQ comments on the SPPP for track relocation, 10/9/96. P. 108714-108715.

171. Report: Data Quality Report, prepared by Weston, 10/9/96. P. 108716-108764. A transmittal letter dated November 12, 1996, is attached.

172. Progress Report No. 53, for the Potomac Yard Site, September 1, 1996 through September 30, 1996, prepared by Earth Tech Remediation Services, 10/11/96. P. 108765-108772. An October 11, 1996, transmittal letter and October 5, 1996, letter to Mr. Jay Green are attached.

173. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Channing J. Martin, William, Mullen, Christian, & Dobbins, re: Common stock purchase agreement between Virginia Retirement System and LF Strategic Realty Investors, 11/12/96. P. 108773-108773.

22 174. Progress Report No. 54., for the Potomac Yard site, October 1, 1996, through October 31, 1996, prepared by Earth Tech Remediation Services, 11/13/96. P. 108774- 108781. A November 13, 1996, transmittal letter is attached.

175. Letter to Ms. Patricia McMurray, VDEQ, from Mr. Garland H. Moore III, ETI, re: Response to VDEQ comments on ground water discharge into a sediment trap, 11/20/96. P. 108782-108782.

176. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Channing J. Martin, Williams, Mullen, Christian, & Dobbins, re: Meeting dates to discuss technical issues surrounding analytical data, 12/3/96. P. 108783- 108783.

177. Letter to Mr. Scott Slagley, RF&P, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Comments on changes made to the storm water management system in the engineering evaluation/cost analysis, 12/7/96. P. 108784-108785.

178. Letter to Mr. Jeffrey A. Dodd, U.S. EPA, from Mr. Channing J. Martin, Williams, Mullen, Christian, & Dobbins, re: Possible meeting dates in January with EPA, 12/9/96. P. 108786-108786.

179. Letter to Ms. Ellen Pickering, resident, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Transmittal of the December 31, 1996, action memorandum entitled "Request for Approval of Removal Action at the Potomac Yard Site in the City of Alexandria, and Arlington County, Virginia," (undated) . P. 108787-108787.

180. Letter to Mr. Denis O'Sullivan, resident, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Transmittal of the December 31, 1996, action memorandum entitled "Request for Approval of Removal Action at the Potomac Yard Site in the City of Alexandria, and Arlington County, Virginia,"(undated). P. 108788-108788.

181. Letter to Mr. Marylin Doherty, resident, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Transmittal of the December 31, 1996, action memorandum entitled "Request for Approval of Removal Action at the Potomac Yard Site in the City of Alexandria, and Arlington County, Virginia,"(undated). P. 108789-108789.

23 182. Progress Report No. 55, for the Potomac Yard site. November 1, 1996, through November 30, 1996, prepared by Earth Tech Remediation Services, 12/13/96. P. 108790-108796. A December 13, 1996, transmittal letter is attached.

183. Memorandum to Mr. Thomas C. Voltaggio, U.S. EPA, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Request for approval of removal action at the Potomac Yard Site, 12/31/96. P. 108797-109011. The following are attached:

a) Attachment 1: Maps, figures and sketches,

b) Attachment 2: EE/CA Approval Memorandum,

c) Attachment 3: Engineering Evaluation/Cost Analysis.

184. Progress Report No. 56r for the Potomac Yard Site, December 1, 1996, through December 31, 1996, prepared by Earth Tech Remediation Services, 1/13/97. P. 109012-109018. A January 13, 1997, transmittal letter is attached.

185. Report: Trip Report for the Off-Site Sediment and Surface Water Sampling for the Potomac Yard Site, prepared by Weston, 1/15/97. P. 109019-109035. A transmittal letter dated January 15, 1997, is attached.

186. Progress Report No. 57, for the Potomac Yard Site, January 1, 1997, through January 31, 1997, prepared by Earth Tech Remediation Services, 2/13/97. P. 109036- 109045. A February 13, 1997, transmittal letter is attached.

187. Letter to Mr. Jeffrey Dodd, U.S. EPA, from Mr. William J. Skrabak, AHD, re: Response to the December 31, 1996, action memorandum entitled "Request for Approval of Removal Action at the Potomac Yard Site in the City of Alexandria, and Arlington County, Virginia," 2/26/97. P. 109046-109046.

188. Progress Report No. 58, for the Potomac Yard Site, February 1, 1997, through February 28, 1997, prepared by Earth Tech Remediation Services, 3/13/97. P. 109047-109054. A March 13, 1997, transmittal letter is attached.

24 189. Letter to Mr. William J. Skrabak, AHD, from Mr. Jeffery A. Dodd, U.S. EPA, re: Correspondence discussing the EPA request for additional sampling, 3/18/97. P. 109055-109055.

190. Progress Report No. 59, for the Potomac Yard Site, March 1, 1997, through March 31, 1997, prepared by Earth Tech Remediation Services, 4/13/97. P. 109056- 109063. An April 13, 1997, transmittal letter is attached.

191. Progress Report No. 60, for the Potomac Yard Site, April 1, 1997, through April 30, 1997, prepared by Earth Tech Remediation Services, 5/13/97. P. 109064- 109071. A May 13, 1997, transmittal letter is attached.

192. Progress Report No. 61, for the Potomac Yard Site, May 1, 1997, through May 31, 1997, prepared by Earth Tech Remediation Services, 6/13/97. P. 109072-109079. A June 13, 1997, transmittal letter is attached.

193. Progress Report No. 62, for the Potomac Yard site, June 1, 1997, through June 30, 1997, prepared by Earth Tech Remediation Services, 7/13/97. P. 109080-109087. A July 13, 1997, transmittal letter is attached.

194. Letter to Mr. Scott Slagely, Commonwealth Atlantic Land V, Inc., from U.S. EPA, re: Notification of EPA's disapproval of the Offsite Ecological Risk Assessment(OERA), 7/22/97. P. 109088-109092.

195. Letter to Ms. Joan Becker-Kelsch, Arlington County Department of Environmental Services (ACDES), from Mr. Jeffrey A Dodd, U.S. EPA, re: Comments further addressing the ACDES concern over the consumption of fish from Four Mile Run and the Potomac River, 7/25/97. P. 109093-109094.

196. Letter to Mr. William J. Skrabak, Alexandria Health Department (AHD), from Mr. Jeffrey A. Dodd, U.S. EPA, re: Comments further addressing the City of Alexandria Health Department concerns over consumption of fish from Four Mile Run and the Potomac River, 7/25/97. P. 109095-109096.

25 197. Letter to Pat McMurray, VDEQ, from Mr. Jeffrey A. Dodd, U.S. EPA, re: Comments and Concerns over the consumption of fish from Mile Run and the Potomac River, 7/25/97. P. 109097-109098.

198. Letter to Ms. Karen W. Melvin, U.S. EPA, from Mr. Channing J. Martin, Williams, Mullen, Christian & Dobbins, re: Comments on the OERA for Potomac Yard, 7/31/97. P. 109099-109100.

199. Report: Sampling Report,(undated). P. 109101-109108.

200. Letter to Mr. Jeff Dodd, U.S. EPA, from Ms. Joan Becker Kelsch, Arlington County Department of Environmental Services, re: Transmittal of comments on the Off-Site Ecological Risk Assessment for the Potomac Yard Site, 4/10/97. P. 109109-109110.

201. Letter to Mr. Jeff Dodd, U.S. EPA, from Mr. William Skrabak, Alexandria Health Department, re: Transmittal of comments on the Off-Site Ecological Risk Assessment for the Potomac Yard Site, 4/21/97. P. 109111-109112.

202. Report: Progress Report No. 61, Potomac Yard Site, prepared by Earth Tech, Inc., 6/13/97. P. 109113- 109120. A June 13, 1997, letter to Mr. Jeff Dodd, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., transmitting the progress report; a June 5, 1997, letter to Mr. Jay Green, VDEQ, from Ms. Kristin Bright, Earth Tech, Inc., transmitting a May 1997, Free Product Removal Report; and a May 1997, Free Product Removal Report, are attached. 203. Report: Progress Report No. 62, Potomac Yard Site. prepared by Earth Tech, Inc., 7/13/97. P. 109121- 109128. A July 13, 1997, letter to Mr. Jeff Dodd, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., transmitting the progress report; a July 5, 1997, letter to Mr. Jay Green, VDEQ, from Ms. Bettina Rayfield, Earth Tech, Inc., transmitting a June 1997, Free Product Removal Report; and a June 1997, Free Product Removal Report, are attached.

204. Letter to Mr. Scott Slagley, Commonwealth Atlantic Land V, Inc., from Mr. Jeff Dodd, U.S. EPA, re: Transmittal of EPA's comments on the Off-Site Ecological Risk Assessment for the Potomac Yard Site, 7/22/97. P. 109129-109137.

26 205. Letter to Mr. William Skrabak, Alexandria Health Department, from Mr. Jeffrey Dodd, U.S. EPA, re: Response to concerns about the potential health effects resulting from the consumption of fish from Four Mile Run and the Potomac River in the vicinity of the Potomac Yard Site, 7/25/97. P. 109138-109139.

206. Letter to Pat McMurray, VDEQ, from Mr. Jeffrey Dodd, U.S. EPA, re: Response to concerns about the potential health effects resulting from the consumption of fish from Four Mile Run and the Potomac River in the vicinity of the Potomac Yard Site, 7/25/97. P. 109140- 109141.

207. Letter to Ms. Joan Becker-Kelsch, Arlington County Department of Environmental Services, from Mr. Jeffrey Dodd, U.S. EPA, re: Response to concerns about the potential health effects resulting from the consumption of fish from Four Mile Run and the Potomac River in the vicinity of the Potomac Yard Site, 7/25/97. P. 109142- 109143.

208. Letter to Ms. Karen Melvin, U.S. EPA, from Mr. Channing Martin, Williams, Mullen, Christian & Dobbins, re: Request for a meeting to discuss EPA7s comments on the Off-Site Ecological Risk Assessment, 7/31/97. P. 109144-109145.

209. Report: Progress Report No. 63, Potomac Yard Site, prepared by Earth Tech, Inc., 8/13/97. P. 109146- 109155. An August 13, 1997, letter to Mr. Jeff Dodd, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., transmitting the progress report; an August 5, 1997, letter to Mr. Jay Green, VDEQ, from Ms. Bettina Rayfield, Earth Tech, Inc., transmitting a July 1997, Free Product Removal Report; and a July 1997, Free Product Removal Report, are attached.

210. Report: Progress Report No. 64, Potomac Yard Site, prepared by Earth Tech, Inc., 9/12/97. P. 109156- 109163. A September 13, 1997, letter to Mr. Jeff Dodd, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., transmitting the progress report; a September 5, 1997, letter to Mr. Jay Green, VDEQ, from Ms. Bettina Rayfield, Earth Tech, Inc., transmitting an August 1997, Free Product Removal Report; and an August 1997, Free Product Removal Report, are attached.

27 211. Report: Progress Report No. 65, Potomac Yard Site, prepared by Earth Tech, Inc., 10/13/97. P. 109164- 109171. An October 13, 1997, letter to Mr. Jeff Dodd, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., transmitting the progress report; an October 7, 1997, letter to Mr. Jay Green, VDEQ, from Ms. Bettina Rayfield, Earth Tech, Inc., transmitting a September 1997, Free Product Removal Report; and a September 1997, Free Product Removal Report, are attached.

212. Report: Progress Report No. 66, Potomac Yard Site, prepared by Earth Tech, Inc., 11/13/97. P. 109172- 109179. A November 13, 1997, letter to Mr. Jeff Dodd, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., transmitting the progress report; a November 6, 1997, letter to Mr. Jay Green, VDEQ, from Ms. Bettina Rayfield, Earth Tech, Inc., transmitting an October 1997, Free Product Removal Report; and an October 1997, Free Product Removal Report, are attached.

213. Letter to Mr. Scott Slagley, Commonwealth Atlantic Land V, Inc., from Mr. Jeffrey Dodd, U.S. EPA, re; Transmittal of EPA7 s comments on the revised Off-Site Ecological Assessment, 12/2/97. P. 109180-109182.

214. Report: Progress Report No. 67, Potomac Yard Site, prepared by Earth Tech, Inc., 12/12/97. P. 109183- 109191. A December 12, 1997, letter to Mr. Jeff Dodd, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., transmitting the progress report; a December 5, 1997, letter to Mr. Jay Green, VDEQ, from Ms. Bettina Rayfield, Earth Tech, Inc., transmitting a November 1997, Free Product Removal Report; and a November 1997, Free Product Removal Report, are attached.

215. Report: Off-Site Ecological Assessment for the Potomac Yard Site, Arlington County and City of Alexandria, Viraina, prepared by The Weinberg Group, Inc., 12/29/97. P. 109192-109290. A December 29, 1997, transmittal letter to Mr. Jeffrey Dodd, U.S. EPA, from Ms. Judy Durda, The Weinberg Group Inc., is attached.

28 216. Report: Progress Report No. 68. Potomac Yard Site, prepared by Earth Tech, Inc., 1/13/98. P. 109291- 109298. A January 11, 1998, letter to Mr. Jeff Dodd, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., transmitting the progress report; a January 5, 1998, letter to Mr. Jay Green, VDEQ, from Ms. Bettina Rayfield. Earth Tech, Inc., transmitting a December 1997, Free Product Removal Report; and a December 1997, Free Product Removal Report, are attached.

217. Letter to Mr. Scott Slagley, Commonwealth Atlantic Land V, Inc., from Mr. Jeffrey Dodd, U.S. EPA, re: Notification that the Respondent has met all of the terms related to the performance of work as specified in Section VIII of the Consent Order, 2/9/98. P. 109299-109300.

218. Report: Progress Report No. 69, Potomac Yard Site, prepared by Earth Tech, Inc., 2/11/98. P. 109301- 109308. A February 11, 1998, letter to Mr. Jeff Dodd, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., transmitting the progress report; a February 5, 1998, letter to Mr. Jay Green, VDEQ, from Ms. Bettina Rayfield. Earth Tech, Inc., transmitting a January 1998, Free Product Removal Report; and a January 1998, free product removal report, are attached.

219. Report: Progress Report No. 70, Potomac Yard Site, prepared by Earth Tech, Inc., 3/11/98. P. 109309- 109316. A March 11, 1998, letter to Mr. Jeff Dodd, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., transmitting the progress report; a March 5, 1998, letter to Mr. Jay Green, VDEQ, from Ms. Bettina Rayfield, Earth Tech, Inc., transmitting a February 1998, Free Product Removal Report; and a February 1998, Free Product Removal Report, are attached.

220. Location map for the Potomac Yard Site entitled, "Figure 3-1: Current Drainage Conditions for North Yard and North Yard Tail," prepared by Earth Tech, Inc., 1/30/96. P. 109317-109317.

29 221. Table entitled, "Data Summary for Inorganic Compounds," 10/9/96. P. 109318-109319. An October 9, 1996 table entitled, "Data Summary for Semi-Volatile Organic Compounds," is attached.

222. Letter to Mr. Jeffrey Dodd, U.S. EPA, from Mr. Channing' Martin, William, Mullen, Christian & Dobbins, re: Request for copy of the Administrative Order by Consent, 3/6/97. P. 109320-109322. A March 11, 1997, letter to Mr. Jeffrey Dodd, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., responding to a request for information regarding Commonwealth Atlantic Properties Inc. and a February 19, 1999, routing and transmittal slip to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Jeffrey Dodd, U.S. EPA, are attached.

223. Report: Work Plan for Potomac Yard Removal Action, prepared by Earth Tech, Inc., 4/28/97. P. 109323- 109393. An April 28f 1997, transmittal letter to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Robert Jennings, Earth Tech, Inc., is attached.

224. Memorandum to Ms. Cynthia Sale from Mr. Jeffrey Dodd, U.S. EPA, re: Request for comments on the Work Plan for Potomac Yard Removal Action, 5/16/97. P. 109394- 109401. The following are attached:

a) a May 16, 1997, memorandum to Pat McMurray from Mr. Jeffrey Dodd, U.S. EPA, requesting comments on the Work Plan for the Potomac Yard Removal Action;

b) a May 16, 1997, memorandum to Ms. Joan Becker-Kelsch from Mr. Jeffrey Dodd, U.S. EPA, requesting comments on the Work Plan for the Potomac Yard Removal Action;

c) a May 16, 1997, memorandum to Mr. Bill Skrabak from Mr. Jeffery Dodd, U.S. EPA, requesting comments on the Work Plan for the Potomac Yard Removal Action;

d) four May 16, 1997, facsimile journal sheets.

30 225. Letter to Mr. Jeffrey Dodd, U.S. EPA, from Mr. William Skrabak, Virginia Department of Health, re: Comments on the Work Plan for the Potomac Yard Removal Action, 6/16/97. P. 109402-109404.

226. Letter to Mr. Jeffrey Dodd, U.S. EPA, from Hironmoy Sikdar, Roy F. Weston. Inc. re: Transmittal of a Technical Review Document for the Work Plan for the Potomac Yard Removal Action, 6/26/97. P. 109405- 109407. The Technical Review Document is attached.

227. Letter to Mr. Scott Slagley, Commonwealth Atlantic Land V, Inc., from Mr. Jeffrey Dodd, U.S. EPA, re: Comments regarding the Work Plan for the Potomac Yard Removal Action, 7/7/97. P. 109408-109412.

228. Letter to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Samuel Baughman, Roy F. Weston, Inc., re: Comments on the Response Action Plan, 12/9/97. P. 109413-109415. An April 3, 1998, facsimile transmittal sheet to Mr. Daniel McGoldrick, U.S. EPA, from Hironmoy Sikdar, Roy F. Weston, Inc., is attached.

229. Letter to Mr. Scott Slagley, Commonwealth Atlantic Land V, Inc., from Mr. Abraham Ferdas, U.S. EPA, re: Transmittal of the Administrative Order for the Potomac Yard Site, 2/18/98. P. 109416-109416.

230. Letter to Ms. Erica Dameron, Virginia Department of Environmental Quality, from Mr. Abraham Ferdas, U.S. EPA, re: Transmittal of the Administrative Order for the Potomac Yard Site, 2/18/98. P. 109417-109417.

231. Memorandum to Mr. W. Michael McCabe, U.S. EPA, from Mr. Abraham Ferdas, U.S. EPA, re: Transmittal of the Administrative Order by Consent for the Potomac Yard Site, 2/18/98. P. 109418-109419.

232. Administrative Order by Consent for the Removal Response Action in the Matter of: The Potomac Yard Site, Commonwealth Atlantic Land V, Inc., Docket No. III-97-87-DC, 2/18/98. P. 109420-109450.

31 233. Letter to Mr. Jeffrey Dodd, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Land V, Inc., re: Request for EPA's approval of Earth Tech as developer of the Response Action Plan, 2/23/98. P. 109451- 109452. A January 29, 1999, routing and transmittal slip to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Jeffrey Dodd, U.S. EPA, is attached.

234. Report: Revised Response Action Plan for Potomac Yard, prepared by Earth Tech Inc., 3/16/98. P. 109453- 109522. A March 16, 1998, transmittal letter to Mr. Jeffrey Dodd, U.S. EPA, from Mr. Robert Jennings, Earth Tech, Inc., is attached.

235. Letter to Mr. Daniel McGoldriclc, U.S. EPA, from Hironmoy Sikdar, Roy F. Weston, Inc., re: Transmittal of the Technical Review Document for the Revised Reponse Action Plan, 3/26/98. P. 109523-109527. An April 3, 1998, facsimile transmittal memorandum to Mr. Daniel McGoldrick, U.S. EPA, from Hironmoy Sikdar, Roy F. Weston, Inc., and the Technical Review Document, are attached.

236. Report: Progress Report No. 71, Potomac Yard Site, prepared by Earth Tech, Inc., 4/13/98. P. 109528- 109536. An April 13, 1998, transmittal letter to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Land V, Inc.; an April 3, 1998, Free Product Removal Report; and an April 3, 1998, transmittal letter to Mr. J.D. Green, VDEQ, from Ms. Bettina Rayfield, Earth Tech, Inc., are attached.

32 237. Facsimile transmittal memorandum to Mr. Daniel McGoldrick, U.S. EPA, from Hironmoy Sikdar, Roy F. Weston, Inc., re: Transmittal of information regarding the Potomac Yard Site, 4/24/98. P. 109537-109544. The following are attached:

a) an undated chart entitled, "Potomac Greens Sediments;"

b) a figure entitled, "Figure 2: Sample Location Map, Potomac Yard Site;"

c) an October 9, 1996, table entitled, "Data Summary for Semi-Volatile Organic Compounds;"

d) an October 9, 1996, table entitled, "Data Summary for Inorganic Compounds."

238. Report: Progress Report No. 1, Potomac Yard Site, prepared by Earth Tech, Inc., 5/13/98. P.109545- 109547. A May 13, 1998, transmittal letter to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., is attached.

239. Report: Progress Report No. 2, Potomac Yard Site, prepared by Earth Tech, Inc., 6/12/98. P. 109548- 109550. A June 12, 1998, transmittal letter to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., is attached.

240. Letter to Mr. Scott Slagley, Commonwealth Atlantic Land V, Inc., from Mr. Daniel McGoldrick, U.S. EPA, re: Comments on the Revised Response Action Plan, 6/18/98. P. 109551-109553. A certified mail receipt is attached.

241. Report: Progress Report, Potomac Yard, June 1998, prepared by Earth Tech, Inc., 7/13/98. P. 109554- 109556. A July 13, 1998, transmittal letter to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., is attached.

242. Report: Revised Response Action Plan for Potomac Yard, prepared by Earth Tech, Inc., 7/23/98. P. 109557- 109627. A July 23, 1998, transmittal letter to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Robert Jennings, Earth Tech, Inc., is attached.

33 243. Letter to Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., from Mr. Daniel McGoldrick, U.S. EPA, re: EPA's approval of the Revised Response Action Plan, 8/11/98. P. 109628-109629. A certified mail receipt is attached.

244 . Report: Progress Report, Potomac Yard. July 1998, prepared by Earth Tech, Inc., 8/13/98. P. 109630- 109632. An August 13, 1998, transmittal letter to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., is attached.

245. Letter to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., re: Notification that implementation of the Response Action Plan will be delayed, 8/25/98. P. 109633- 109633.

246. Report: Narrative Cost Summary Report. Potomac Yard, MD, Removal Order Costs from 9/22/92 to 2/9/98, prepared by U.S. EPA, 9/3/98. P. 109634-109685. A September 3, 1998, transmittal letter to Ms. Susan Buffington, RF&P Railroad Company and Mr. Channing Martin, Williams, Mullen, Christian & Dobbins, from Barbara Borden, U.S. EPA, and a September 30, 1998, routing and transmittal slip to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Jeffrey Dodd, U.S. EPA, are attached.

247. Letter to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Robert Jennings, Earth Tech, Inc., re: Notification that field activities to implement the Response Action Plan will begin on September 15, 1998, 9/10/98. P. 109686-109687. A September 10, 1998, facsimile transmittal sheet to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Robert Jennings, Earth Tech, Inc., is attached.

248. Report: Progress Report, Potomac Yard, August 1998, prepared by Earth Tech, Inc., 9/11/98. P. 109688- 109690. A September 11, 1998, transmittal letter to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., is attached.

34 249. Report: Progress Report, Potomac Yard, September 1998, prepared by Earth Tech, Inc., 10/13/98. P. 109691- 109693. An October 13, 1998, transmittal letter to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Scott Slagley, Commonwealth Atlantic Land V, Inc., is attached.

250. Report: Progress Report, Potomac Yard, October 1998, prepared by Earth Tech, Inc., 11/13/98. P. 109694- 109695.

251. Report: Interim Final Report for Potomac Yard Removal Response Action, prepared by Earth Tech, Inc., 11/13/98. P. 109696-109735. A transmittal letter to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Robert Jennings, Earth Tech, Inc., is attached.

252, Letter to Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., from Mr. Daniel McGoldrick, U.S. EPA, re: Notification of EPA's approval of the Interim Final Report for the Potomac Yard Removal Response Action, 3/25/99. P. 109736-109736.

253. Letter to EPA Region III Superfund Accounting from Mr. Scott Slagley, Commonwealth Atlantic Properties, Inc., re: Transmittal of Commonwealth Atlantic Land V, Inc.'s payment for oversight costs at the Potomac Yard Site, 4/1/99. P. 109737-109739. A March 31, 1999, payment check and a certified mail receipt are attached.

254. Letter to Mr. Daniel McGoldrick, U.S. EPA, from Mr. Robert Jennings, Earth Tech, Inc., re: Notification of a revised schedule for Quarterly Stormwater Monitoring activities at the Potomac Yard Site, 5/4/99. P. 109740-109740.

255. Report: Itemized Cost Summary Report, Potomac Yard, MD, Scores Report Version 3 Costs from 2/18/98 to 4/30/99, prepared by U.S. EPA, 6/3/99. P. 109741- 109750. A June 4, 1999, routing and transmittal slip to Mr. Daniel McGoldrick, U.S. EPA, from Ms. Hattie Waters, U.S. EPA, is attached.

256. Newspaper article entitled, "Potomac Yard Deal Nixes Interchange on Parkway," The Journal, (undated). P. 109751-109752.