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 5-1
5.0 PERFORMANCE STANDARDS & CONSTRUCTION QUALITY
CONTROL
5.1 COMPARISON TO CLEANUP GOALS
The components of the preferred remedy, the RAO for surface soils and dry sediments and the
determination of cleanup goals are outlined in Section 2.1 and those components that were
scheduled to occur that required comparison to the cleanup goals have all been implemented.
Overall, the removal of soils at the proposed excavation areas at LLs 1-4 has reduced COCs to
below the applicable cleanup goals with the exception of a sole Arochlor-1254 concentration of
54 mg/kg at LL1ss-029-cs. This concentration at this location exceeds the applicable cleanup
goal of 35 mg/kg by less than one order of magnitude. The Ohio EPA and USACE agreed that
although COCs remained in residual soils within the excavation above the applicable cleanup
goal, further excavation was not possible and the extent of soil removal had been satisfied (Ohio
EPA 2008b).
5.2 ASSESSMENT OF DATA QUALITY
5.2.1 Quality Assurance Project Plan
The QAPP Addendum (Shaw 2006c) was prepared by Shaw to supplement the FSP Addendum
(Shaw 2006b) for the remediation of soils in LLs 1-4. The QAPP Addendum was required to
document adherence to the Facility-wide QAPP in the Facility-wide Sampling and Analysis Plan
(FSAP) (SAIC 2001a) and stipulate project-specific addendum requirements. The overall
objectives of the QAPP Addendum are to identify procedures for sampling, chain-of-custody,
laboratory analysis, instrument calibration, data reduction and reporting, internal quality control,
audits, preventive maintenance, and corrective action.
5.2.2 Quality Assurance/Quality Control Procedures
The QAPP Addendum (Shaw 2006c) presents the field and laboratory QA/QC policies and
procedures that were followed during the implementation of the field work and sampling
activities. The purpose of the QA/QC procedures is to address the specific objectives for
analytical accuracy, precision, completeness, representativeness, and comparability (SAIC
2001a).
5.2.3 Data Quality Objectives
Data Quality Objectives (DQOs) are qualitative and quantitative statements that specify the
quality of data required to support decisions made during investigation activities, and are based
on the end uses of the data being collected (SAIC 2001a). The end use of the confirmation data
collected as part of the remediation of soils and dry sediments at LLs 1-4 is to verify that COCs
have been removed to below the cleanup goals in accordance with the RAO. Per the QAPP
Addendum (Shaw 2006c), the contracted laboratories were required to follow the QC parameters
stated in the Louisville Chemistry Guidelines (LCG; USACE 2002) and the USEPA Publication
SW-846, Test Methods for Evaluation of Solid Waste (USEPA, 2004) for each chemical
analyzed.
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