Download App B Sampling and Analysis Plan

Project-Specific SAP for the Remedial Action
Installation Restoration Site 25
Former Naval Air Station Moffett Field, California
Sampling and Analysis Plan
Revision number: NA
Revision Date: NA
EXECUTIVE SUMMARY
INTRODUCTION
ITSI Gilbane Company (ITSI Gilbane), has prepared this Sampling and Analysis Plan (SAP) to describe
sampling and analysis activities to be performed during implementation of Remedial Action (RA) at
Installation Restoration (IR) Site 25 at the former Naval Air Station Moffett Field, California. The
project site is situated 35 miles south of San Francisco, and 10 miles north of San Jose, California.
ITSI Gilbane has prepared this SAP on behalf of the United States Department of the Navy (Navy).
ITSI Gilbane is implementing the Remedial Action (RA) under the Naval Facilities Engineering
Command Southwest (NAVFAC SW) Environmental Multiple Award Contract (EMAC), Contract
Number N62473-10-D-0808, Task Order (TO) 0003.
SUMMARY OF PROJECT OBJECTIVES
The main objective of this project is to conduct a remedial action using excavation of sediment and offsite disposal so that IR Site 25 is available for unlimited use and unrestricted exposure, including
potential use as a tidal marsh that supports a wide variety of habitat and species, and use as a managed
pond that retains storm water and provides open water habitat. The excavations will progress as
necessary to achieve the upper bound (do-not-exceed) remediation goals (RGs). The Navy does not
anticipate excavating much deeper than 2 feet below ground surface (bgs) or expanding the excavations
horizontally outside the polygons identified for remediation. A record of decision (ROD) was prepared
by the Navy to present the remedy selected by the Navy and U.S. EPA with concurrence from the State
of California, as represented by the California Regional Quality Control Board (Water Board). The
Navy developed two sets of site-specific RGs in the feasibility study and published them in the ROD, as
indicated in the table below. By attaining the (upper bound) do-not-exceed RGs at each polygon to be
excavated (to be confirmed by confirmation sampling), the (lower bound) site-wide average RGs will be
attained.
Remediation Goals for IR Site 25
Site-Wide Average (lower bound)
Do-Not-Exceed (upper bound)
Notes:
1.
2.
Lead
Zinc
Total DDT
Total PCBs
33
180
0.016
0.200
93.8
314
0.109
0.210
RGs are for the tidal marsh scenario.
All values are in micrograms per kilogram (parts per million)
It is estimated that 33,000 cubic yards of material will be removed during the RA with options for
additional excavation. Backfill of the excavation will only be required in areas if it is necessary to
maintain the hydraulic conditions at the site (for example in wetland areas so that re-vegetation efforts
are successful). This SAP also includes formal procedures for characterizing the clean fill sediment (onsite borrow material) so that the data are suitable for use in a post-RA calculation of site-wide average
concentrations of COECs.
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