Rocky Mounwin ArsenaI CCR Addendum

MNTS Project Revision I

WBS 2.03.13.44000 3/29/2006

1.5 Contingent Soil Volume Procedure

The CSV Procedure (RVO/PMC SOP: RVOP.009-Revision 2) was used for the implementation

of the additional CSV removal at NCSA-8b of the NINTS Remediation. Project. The BAS

Residual Risk Soil Concentration Verification SAP, Revision 1, was initially used to identify the

soils potentially posing a risk to small birds and was used after the initially identified soil was

removed. The standard CSV Procedure SAP was used to collect the other three single point

samples for analyses.

11,133 bcy of additional CSV were removed at site NCSA-8b for a project total of 11,520 bcy.

All CSV was disposed in the HWL. The total number of additional confirmatory soil samples

collected at NCSA-8b was four for a new MNTS Project total of 3 1.

0004262B 1,5206-3

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Rocky Mountain Arsenal CCR Addendum

MNTS Project Revision I

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5.2 Summary of QA/QC Documentation

5.2.2 Excavation

Table 5.2 provided below has been updated to reflect the additional CSV removed in 2003 at

NCSA-8b. All other quantities in the table are consistent with the Final CCR.

Table 5.2 Miscellaneous Northern Tier Soil Remediation

Human Health Soil Biota Soil Priority I Demolition

ROD d Design' Actuale CSVb ROD Design Actual ROD Design Debris

Project Site (bcy) (bcy) (bcy) (bcy) (bcy) (bcy) (bcy) (bey) (bcy) (bcy)

NCSA-8b 1,979 1,979 2,323 11,520 18,666 16,800 26,452 0 0 3,726

NPSA-4 259 259 332 0 0 0 0 0 0 0

Pistol Rage 1,200 1,200 1,457 -- 0 T 0 0 0 0 0 147

Total 3,438 3,438 4,112 11,520 18,666 16,800 26,452 1 0 0 3,873a.'

a. The 100 Percent Design volume (which includes a 1.6 swell factor) for demolition debris from structure is

taken from the ROD.

b. CSV represents additional excavation, and is not included in the actual volume excavated.

C. Design volumes are from the Miscellaneous Northern Tier, Miscellaneous Southern Tier, and Lake

Sediments Remediation Project, 100% Design Package (FWENC 1998).

d. ROD volumes are calculated in the Soil Quantity Calculation Summary Report (FWENC 1996).

e. Excavation volumes are calculated in the Excavation Volume Verification Calculations (reference project

file number MNTSR-8. 10, Record Drawings/Excavation Volume Verification (Calculations and

Summaries)).

f The final disposal location for all wastes is given in sections 1.2 and 7.3 of this report.

A CSV Tracking Form was used to identify, document, track, and record approvals for CSV for

each of the NINTS Remediation Sites. The table provided below has been updated to reflect the

additional confirmatory soil samples taken at NCSA-8b. The initial 27 samples in the table are

consistent with the Final CCR, Revision 2 (FWENC 2002).

CSV ID Lab Sample ID Location of Sample Result

Number Number

CSV-0001 NCSA-8b-01 NCSA-8b HHE Excavation Non-Exceedance

CSV-0002 NCSA-8b-02 NCSA-8b HHE Excavation Non-Exceedance

CSV-0003 NCSA-8b-03 NCSA-8b HHE Excavation Non-Exceedance

CSV-0004 NCSA-8b-04 NCSA-8b HHE Excavation Exceedance

CSV-0005 NCSA-8b-05 NCSA-8b HHE Excavation Non-Exceedance

CSV-0006 NCSA-8b-06 NCSA-8b HHE Excavation Non-Exceedance

CSV-0007 NCSA-8b-07 NCSA-8b HHE Excavation Non-Exceedance

CSV-0008 NCSA-8b-08 NCSA-8b HHE Excavation Non-Exceedance

CSV-OO09 NCSA-8b-09 NCSA-8b HHE Excavation Exceedance

CSV-0010 NCSA-8b-10 NCSA-8b HHE Excavation Exceedance

CSV-00 I I NCSA-8b- I I NCSA-8b HHE Excavation Exceedance

CSV-0012 NCSA-8b-12 NCSA-8b HHE Excavation Non-Exceedance

CSV-0013 NCSA-8b-13 NCSA-8b HHE Excavation Non-Exceedance

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MNTS Project Revision I

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CSV-0014 NCSA-8b-14 NCSA-8b HHE Excavation Non-Exceedance

CSV-0015 NPSA-4-01 NPSA-4 HHE Excavation Non-Exceedance

CSV-0016 NPSA-4-02 NPSA-4 HHE Excavation Non-Exceedance

CSV-0017 NPSA-4-03 NPSA-4 HHE Excavation Non-Exceedance

CSV-OO18 NPSA-4-04 NPSA-4 HHE Excavation Non-Exceedance

CSV-OO19 NPSA-4-05 NPSA-4 HHE Excavation Non-Exceedance

CSV-0020 NPSA-4-06 NPSA-4 HHE Excavation Non-Exceedance

CSV-0021 NPSA-4-07 NPSA-4 HHE Excavation Non-Exceedance

CSV-0022 NPSA-4-08 NPSA-4 HHE Excavation Non-Exceedance

CSV-0023 NPSA-4-09 NPSA-4 HHE Excavation Non-Exceedance

CSV-0024 NPSA-4-10 NPSA-4 HHE Excavation Non-Exceedance

CSV-0025 NPSA-4-11 NPSA-4 HHE Excavation Non-Exceedance

CSV-0145 NCSA-8b-15 NCSA-8b HHE Excavation Non-Exceedance

CSV-0146 NCSA-8b-16 NCSA-8b HHE Excavation Non-Exceedance

CSV-0875 NC-8B-01 NCSA-8b HHE Excavation Exceedance

CSV-0878 NC-8B-02 NCSA-8b HHE Excavation Exceedance

CSV-0879 NC-8B-03 NCSA-8b HHE Excavation Non-Exceedance

CSV-0880 NC-8B-04 NCSA-8b HHE Excavation Non-Exceedance

As surveyed, 11,520 bey of CSV was excavated at the NCSA-8b Remediation Site, based on the

exceedance samples. The original signed CSV Tracking Forms from 2003 action are included in

the project files (MNTSR-1 1.6.2). Specific discussion of CSV sampling results is included in

the Data Summary Report (DSR). CSV DSR Revision 0 (FWENC [2000]) documents all

confirmatory samples taken during the 1999 field implementation and is located in project file

NWTSR-10.1.3.1. The Miscellaneous Southern Tier Soils, Miscellaneous Northern Tier Soils,

Existing (Sanitary) Landfills Section 1, Basin F Exterior Part I Soil Remediation Projects, Additional CSV DSR, Rev 0 (TtFW [2006]) was prepared to capture the 2003 CSV sample

results. The Additional CSV DSR, Rev 0 is located in project file MNTSR-23. 1.

Backfill was placed at NCSA-8b after CSV removal by a compactor with a blade. The efforts of

the compactor were augmented with help from the bulldozer and front-end loader. The fill was

placed in loose lifts and compacted in accordance with the Specifications. During the 2003 CSV

removal action, clean soil from Borrow Area 3 was used as backfill at site NCSA-8b. A motor

grader, front loader, and bulldozer were used to blend the excavation into the existing

topography.

5.2.4 Revegetation

Revegetation efforts were completed at the MNTS sites in two phases. The first phase of

revegetation was completed after the MNTS Pro ect work was completed in 1999. The second

phase occurred in 2003 after site NCSA-8b was redisturbed to remove additional CSV. The

NCSA-8b site was seeded in April of 2003 with a complex locally adapted native seed mixture

by the U.S. Fish and Wildlife Service.

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Rocky Mountain Arsenal CCR Addendum

MNTS Project Revision I

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13.0 REFERENCES

EPA et al (U. S. Environmental Protection Agency)

2000 (April) Construction Completion Report Approval letter

FWENC (Foster Wheeler Environmental Corporation)

2002 (February) Miscellaneous Northern Tier Soil Remediation Project, Construction

Completion Report. Revision 2.

2000 (February) Miscellaneous Northern Tier Soil Remediation Project, Construction

Completion Report. Revision 0.

2000 (March) Miscellaneous Northern Tier Soil Remediation Project, Construction

Completion Report. Revision 1.

2000 (March) Contingent Soil Volume Data Summary Report, Revision 0.

2000 (October) Biological Advisory Subcommittee Residual Risk Soil Concentraion

Verification Sampling and Analysis Plan. Revision 1.

TtFW(Tetra Tech Foster Wheeler)

2004 (July) Miscellaneous Northern Tier Soil Remediation Project, Construction

Completion Report. Revision I Errata Pages.

2006 (March) Miscellaneous Southern Tier Soils, Miscellaneous Northern Tier Soils

Existing (Sanitary) Landfills Section 1, Basin F Exterior Part I Soil

Remediation Projects, Additional Contingent Soil Volume Data Summary

Report, Revision 0.

RVO (Remediation Venture Office)

2004 (February) Miscellaneous Northern Tier Soil Remediation Project, Construction

Completion Report, Addendum 1. Revision 0.

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