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 of DCNs, RFIs and NCRs

Replace pages 25 and 26 with replacement pages 25 and 26. Specific changes were as

follows:

The last sentence of the first paragraph was updated with the current number of

DCN,s issued.

A description of DCN-SB-2'1 was added to the bullet-list of DCNs.

The second sentence of the 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 of the DCN Log with replacement page 3. DCN-SB-023 was added to

page )" of the DCN Log.

(Replacement Page Attached)

IIIIIII IIIIIIIII H

00034160 11578-3
Rocky,Niountain,krsenal CCR

Section 35 Soil Remediation Prcýiect Revision I

WBS 2.05.28.02 ApTil f3,2004

4.2.1 Overview of DCNs, 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, and Agencies. Since implementation of the Section 35 Soil Remediation

Project was combined with the Secondary Basms Part 2 Soil Remediation Project, which was

performed in two parts, the DCNs begin with the number 12. The first I I DCNs were'kNTitten

during implementation of Secondary Basins Part 1. The DCN number system which used "SB"

for Secondary Basins was continued during implementation of Part 2 of the project. There were

12 DCNs written, one of which was cancelled, resulting in a total of I I 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 of Biota soil and a minimum of I foot backfill over

the lirnits of Basins 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 183 0 to allow the use of belly-dumps or scrapers within the

project area if using 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 P I and Blota soil to cross Site limits if the

downgradient area was remediated in the same manner.

0 DCN-SB-014: Several revisions to Specifications, drawings and tables. Revised

Specification 0 15 60 to update Legend and Tab] e 1. Rev. ised Specification 02220 -,Arhi ch

added the requirement for back-fill of HHE and Blota soil ditches and channels. Revised

drawing D2 8 34-03 4-C 112 to modify P I excavation adj acent 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 P I soil.

& DCN-SB-015: Revision to Specification 02220 modifying the back-fill requirement to

allow placement of loose 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 of Blota soil inNCSA-5b from Basin A to the

HWL because of CSV soil below the Biota

0 DCN-.-SB-018: Increase in project scope to include the disposal of a pile of miseetianeous

debris located northeast of Building 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 of P I soils in Borrow Area 3.

It also designated an area of clean backfill in Borrow Area 3.

& DCN-SB-021: Cancelled.

00034161 11578-4

0 152 003 _C CR-S ec 3 5 REV I -doc 25

TETRATECH -W-INC.
Rocky Mountain Arsenal CCR

Section 35 Soil Reinediation Project Revision I

W13 S 2 -05.218 -0-1 Aprfl 13, 2004

DCN-SB-022: Revision to Specification 02220 requiring 2 feet of backtill in N-'CSA-2d:

B -2

DCN-SB-02':): Provided for completion of revegetation 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 of the 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 P art,

2/Section 35 Soil Remediation Project, a complete listing of which can be referenced as

Appendix B (RFI Log).

A deficiency in documentation or activity, which renders the quality of an 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 is provided 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 of all design changes can be referenced

withm' the logs provided in Appendix B.

Sand Creek Lateral at 7"h Avenue

On August 6, 2002, the PMC issued this Subcontract Modification to activate the option to

remediate the Sand Creek Lateral at 7 th Avenue.

5.0 CONSTRUCTION QUALITY ASSURANCE]QUALITY CONTROL

5.1 QA1QC Procedures

A CQAP was prepared b y the Contractor and included in the S ection 3 5 100 P ercent Desi nAnalysis. 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 of PMC 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 3 5 100 Percent D esign P ackage CQAP

To ensure that the Subcontractor compliedwith the contents of their CQP, the Contractor

dedicated QC representatives who spent the majority of their workday in the field observing the

execution of the work.

26 0 15 -'003-CCR-S ec 3 5 REV 1. doc

TETRA TECH FW.
Constru ction Procedure CP-003-RM A: Construction Document Bud Record DraWiDg COB trol Attach men t 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 0 1 /15103 0 ill W03 011151037 D1115103 01M5103 Approved

a n d Bi Dta soi I excavati an s th at Grading, Rev. 4, Page 2, Paragraph

overl'e buried water lines.

Require 2 foot backfill in NCSA

2dý B-2.

DCN-SB-,023 Description of revegetallon x Section 02900, Revegetation No 6/M04 6116/04 61161114 1IM14 1,116104 6116104 6116iD4 Approved

activi ties a nd 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 a 11 s i gnatures in ý5) ab ov e are obta in ed o r "no t approv ed'

DCN LOG-061604.doc File Number SB P2 - 11.3.1