Errata Sheet for Section 35 Soil Remediation Project Construction Completion Report, Revision I Rocky Mountain Arsenal June 16, 2004

Pages 25, 26 - Section 4.2.1 Overview ofDCNs, RFIs and NCRs Replace pages 25 and 26 with replacement pages 25 and 26. Specific changes were as follows: The last sentence ofthe first paragraph was updated with the current number of DCN,s issued. A description ofDCN-SB-2'1 was added to the bullet-list ofDCNs. The second sentence ofthe first paragraph after the bullet-list was updated with DCNs specific to Section 35. (Replacement Pages Attached)
Appendix B - DCN, NCR and RFI Logs Replace page 3 ofthe DCN Log with replacement page 3. DCN-SB-023 was added to page )" ofthe DCN Log. (Replacement Page Attached)

IIIIIIIIIIIIIIIIH 00034160 11578-3Rocky,Niountain,krsenal CCR Section 35 Soil Remediation Prcýiect Revision I WBS 2.05.28.02 ApTil f3,2004 4.2.1 Overview ofDCNs, R-FIs and NCRs Both major and minor changes to the design package drawings or specifications were documented on DCNs that were approved by the PMC Project Engineer and Project Manager, RVO Project Engineer, andAgencies. Since implementation ofthe Section 35 Soil Remediation Project was combined with the Secondary Basms Part 2 Soil Remediation Project, which was performed in two parts, the DCNsbegin with the number 12. The first II DCNs were'kNTitten during implementation ofSecondary Basins Part 1. The DCN number system which used "SB" for Secondary Basins was continued during implementation ofPart 2 ofthe project. There were 12 DCNs written, one ofwhich was cancelled, resulting in a total ofII DCN_s issued as follows: DCN-SB-012: Incorporation of an ESD that eliminated the ROD-required soil cover for Basins B, C and D. Required removal ofBiota soil and a minimum ofI footbackfill over the lirnits ofBasins B, C and D. Also included regrading to eliminate depressions. 0 DCN-SB-01-'): Revision to Specification 01550 to add telephone service request form. Revision to Specification 1830 to allow the use ofbelly-dumps or scrapers within the project area ifusing a dedicated haul road. Modified the Subcontractor health and safety requirements for a shower trailer, and it modified the Construction Quality Assurance Plan (CQAP) and Quality Assurance/Quality Control (QA,QC) Matrix to incorporate the latest revisions to the Specifications. Also allowed PI and Blota soil to cross Site limits ifthe downgradient area was remediated in the same manner. 0 DCN-SB-014: Several revisions to Specifications, drawings and tables. Revised Specification 01560 to update Legend and Tab]e 1. Rev. ised Specification 02220 -,Arhich added the requirement forback-fill ofHHE and Blota soil ditches and channels. Revised drawing D2 8 34-034-C112 to modify PI excavation adjacent to a water hydrant. Revised drawing D2834-034-Cl 15 to make excavation coordinates consistent with changes to Drawing D2834-034-CI12. Modifieddraw' D2834-034-CI19 to make Section I consistent with changes to Specification 02220. Revised tables 6.3-1, 2, and 3 and calculation 99-005 to account for PI soil. & DCN-SB-015: Revision to Specification 02220 modifying the back-fill requirement to allow placement ofloose backfill on frozen ground 0 DCN-SB-016: Modification to drawing D2834-034-Cl 15 that corrected one design coordinate and changed coordinate Number 31 0 DCN-SB-017: Changed the disposition ofBlota soil inNCSA-5b from Basin A to the HWL because ofCSV soil below the Biota 0 DCN-.-SB-018: Increase in project scope to include the disposal ofa pile ofmiseetianeous debris located northeast ofBuilding 120 that was generated by U.S. Fish and Wildlife Service (USFWS)

DCN--SB-019: Revision to Specification 02220 to add clear direction regarding, subgrade at Basins C and D & DCN.-SB-020: Increase in project scope adding the removal ofPI soils in Borrow Area 3. It also designated an area ofcleanbackfill inBorrow Area 3. & DCN-SB-021: Cancelled.

00034161 11578-4
0152003_CCR-Sec 35 REV I-doc 25

TETRATECH -W-INC.Rocky Mountain Arsenal CCR Section 35 Soil Reinediation Project Revision I W13S 2-05.218-0-1 Aprfl 13, 2004 DCN-SB-022: Revision to Specification 02220requiring 2 feet ofbacktill in N-'CSA-2d: B-2 DCN-SB-02':): Provided for completion ofrevegetation after future disturbance associated with other projects. Since the Section 35 Soil Remediation Project was implemented with the Secondary Basins Soil Remcdiation Project Part 2, some ofthe DCNs were specific to one project or the other. Design Change Notices 12 through 17 and 23 were specific to Section 35. The complete DCNT log is provided in Appendix B. Request for Information (RFI) sheets were used by the Subcontractor to request infori-nation and/or clan'fication where the design documents were unclear, incomplete, or contained copAradictoryinform. ation. Thifteen RFIs were generate0 during the Secondar-y Basins Part, 2/Section 35 Soil Remediation Project, a complete listing ofwhich can be referenced as Appendix B (RFI Log). A deficiency in documentation or activity, which renders the quality ofan item or activity unacceptable or indeterminate, is considered a nonconformance. Deficiencies observed during this project generated Nonconformance Reports (N.CRs)- One NCR was generated during,the Section 35 Soil Remediation Project. The NCR list isprovided as Appendix B (TNCR Log). 4.2.2 Major Subcontract Modifications The following major contract modification was issued for the Secondary Basins Part 2/Section 35 Soil Remediation Pr 'ect sites. A complete listing ofall design changes can be referenced withm'the logs provided in Appendix B. Sand CreekLateralat 7"hAvenue On August 6, 2002, the PMC issued this Subcontract Modification to activate the option to remediate the Sand Creek Lateral at 7th Avenue. 5.0 CONSTRUCTION QUALITY ASSURANCE]QUALITY CONTROL 5.1 QA1QC Procedures A CQAP was prepared by the Contractor and included in the Section 35 100 Percent DesinAnalysis. This document provides the requirements for QA/QC inspection and testing activities necessary to ensure the final work product meets the design specifications for this project. This document defines the roles and responsibilities ofPMC QA/QC personnel. The CQAP contains a QA/QC matrix that summarizes all QA/QC requirements and their frequencies. The Subcontractor provided a Construction Quality Plan (CQP) to the Contractor for approval prior to mobilization in accordance with the requirements set forth in the following documents: " Technical specifications and drawings " PMC Quality Management Plan (FWENC 2002a) " Section 35 100 Percent Design Package CQAP To ensure that the Subcontractor compliedwith the contents oftheir CQP, the Contractor dedicated QC representatives who spent the majority oftheir workday in the field observing the execution ofthe work.

26 0 15 -'003-CCR-S ec 35 REV 1. doc

TETRA TECH FW.Constru ction Procedure CP-003-RMA: Construction Document Bud Record DraWiDg COBtrol Attachment 6A - Rev. 2 Form CP-306A -RMA

DCN-SB-022 Require I foot backfill In P1 x Section 02220. Backfiliing and No D11i 5103 -01115103 01 /15103 0illW03 011151037 D1115103 01M5103 Approved

and Bi Dta soiIexcavatian s that Grading, Rev.4, Page 2, Paragraph overl'e buried water lines. Require 2 foot backfill inNCSA 2dýB-2.

DCN-SB-,023 Description ofrevegetallon x Section 02900, Revegetation No 6/M04 6116/04 61161114 1IM14 1,116104 6116104 6116iD4 Approved activities and 1 nterrup t ions with Revegetation Stalus table

Legend: Notes:

A = TCHD Tri-County Health Department (1) DCN-XXX-YYY-01 Where XXX is Project Designation and YYY is task of Subcontract Designation. B = CDPHE Colonado Departurient of Health and Envil-oninent (2) Insert DCN Forrn "Describe proposed change". C=EPA Environmental Protection Agency ý3) Insert Change category as shown in DCN Forra "Recommended disposition". (4) Insert DCN Fonn Conditional Release Required - "Yes" or "No". (5) Insert DCN Forin "Originatoe', "PEoject Engincer", "RVO Fngincer". "Project Manager" signature dates (RVO
to review allei PE and PM approve) and regulatory signature dates. (6) 1 n sell "Approv ed" when a11signatures in ý5) ab ove are obta ined or "not approved'

DCN LOG-061604.doc File Number SBP2 - 11.3.1