Final Remedial Action Completion Report for the ... - Rvaap.org

Remedial Action Completion Report
June 2008
Remediation of Soils and Dry Sediments at RVAAP 08-11 (LLs 1-4)
Page 3-18
both laboratories to ensure adequate turn-around-times were achieved in conjunction with
Shaw’s aggressive excavation schedule. Both laboratories performed analyses for
benzo(a)pyrene, 2,4,6-TNT, and inorganics. In addition to these analyses, Test America
analyzed solely for propellants and PCBs and RDX samples were analyzed only by Kemron.
Once dried and processed by the designated off-site laboratory, each multi-increment sample was
analyzed for the COC(s) identified for the discrete area from which the multi-increment sample
was collected. The COCs analyzed and the applicable analytical methods and sample frequency
for multi-increment and QC samples submitted for laboratory analysis are presented in Table
3-4.
3.6.3 Field Quality Control Sampling Procedures
As part of the multi-increment sampling activities, Shaw collected two types of QC samples
consisting of sample duplicates and MS/MSDs in accordance with the Quality Assurance Project
Plan (QAPP; Shaw 2006c). Duplicate samples, were collected at a minimum frequency of 10%
of the field samples. MS/MSD duplicates, MS/MD in the case of inorganics, were collected at a
minimum frequency of 5%. Since the multi-increment samples were collected using disposable
equipment and materials, no equipment rinsate blanks were submitted for analysis. For Quality
Assurance (QA) purposes, the Ohio EPA was periodically on-site to collect split samples from
the multi-increment samples collected by the Shaw field team. The QA samples were shipped by
the Ohio EPA and analyzed separately by the Ohio EPA’s contracted laboratory. Samples
collected to fulfill the field QC requirements for multi-increment sampling are included in Table
3-4.
3.6.4 Summary of Sample Results
The confirmatory sample results verify that contaminated soils and dry sediment have been
removed from the identified discrete areas at LLs 1-4 to below the applicable cleanup goals. In
all there were a total of 119 discrete areas of contamination among the four load lines that
required soil or sediment removal; however, there were only 101 multi-increment samples.
Some of the discrete areas were combined into one multi-increment sample area due to one of
the following reasons:
1. The discrete areas were included in design drawings presented in the RAWP (Shaw
2007b) as one multi-increment sample location due to the close proximity of the areas of
contamination and similar COC(s)
2. Field screen and/or initial confirmatory results required additional excavation that
resulted in the combining of two or more excavation areas
Construction As-Built Drawings are presented in Appendix A and include the areas of
multi-increment confirmatory sample locations. A summary of the results for the
multi-increment samples in relation to the cleanup goals are presented in the data summary tables
(Table B-3) in Appendix B. The laboratory reports and associated data evaluation reports for
the multi-increment samples are presented in Appendix F included as an electronic attachment
to this RACR.
*** FINAL***