FINAL SAMPLING AND ANALYSIS PLAN - Documents for Moffett Field

limits established by the analytical
method or some other document.
Also, discuss why the Project
Quantitation Limit Goal for arsenic
is less than the QL. Revise the SAP
to include all relevant laboratoryspecific
SOPs as discussed the
Uniform Federal Policy for Quality
Assurance Project Plans Manual
dated March 2005 (UFP QAPP
Manual) or provide a summary of
all laboratory procedures in the
SAP. Also, revise the SAP to
reference a source for the QLs and
MDLs presented in Worksheet #15.
Finally, assess the QL for arsenic to
ensure that it meets the PAL.
5 Field Duplicates. This SAP states
that field duplicate samples will not
be collected due to the nonhomogenous
nature of soils and
sediments; however, it is unclear
how reliable decisions can be made
if sample heterogeneity is a
concern. Collection of duplicates is
recommended and procedures
should be included to assess sample
heterogeneity. Revise the SAP to
include field duplicates for soil and
sediment samples. Additionally,
indicate what measures will be
taken to reduce sample
heterogeneity.
listed are specific to BC Labs as
identified in Worksheet 30.
The Project Quantitation Limit
Goal for arsenic will be changed to
0.5 mg/kg.
Field duplicate samples for soil
and sediment will be collected at
10% frequency.
The sampling procedure will be
revised to include homogenization
process.
Response to Comments on Draft Sampling and Analysis Plan
Moffett Field, California
DCN: AMEC-8816-0005-0040
April 2010
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