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, &41? W7015 Oor� ()a u ww, „v�sscnG.x. >xb,rma, is completed for the Eastern GSA Subarea, as documented by concurrence with this Flux, Out Report. No institutional land use connote are necessary at the Eastern GSA .Subarea, however, land use controls will around for the GSA Offuntil tomdradon completions achieved for IM1e Central GSA Subarea. 6. Quality Assurance and Quality Control (QA/QC) 6.1. QA/QC Protocol DOE/LLNL conducted all design, construction, arul operation of Me mmdia( system and compliance monitoring in accordance with the approved Quality Assurance Project Plan (QAPP) (Dibley, 1999) requirements far planning. performing, documenting, and verifying the quality of activities and data. 'the QAPP was prepared for CER ll CLA compliance a ensures that the precismn, accuracy, completeness, and epresentolveuess of perfect data are knowat and are of acceptable quality. The QAPP is used in conjunction with the Stallard Operating Procedures (SOTS) (Goodrich and Lorega, 2009). Dam review, validation, and verification are cendneted on 100% of the inwmmg analytical data. Contract analytical IaWmtories am communally required to provide internal QC checks in [lie form of method blanks, laboratory central samples, matrix spikes, and matrix spike or sample duplicate results with every analysis. During the data validation perecss, the analytical QC data and associated QC accepunec criteria (consul limits) am rerwed. In addition, the DOEALNL con structed, operated, and maintained the EastersEastersGSA magr atlon system In accordance with the Construction QA/QC and Operation and Maintenance QA/QC Plans in Appendices R and D, respectively, ofthe Remedial Design for the GSA OU. 6.2. Sampling and Analysis Protocol Quality amtrel is implemented during the Sample collection process in the field. red percent OF samples are collocated (5% intmlaboratory and 5% Interlabomtory). Field blanks and trip hanks are used to identify contamination that may occur during sample collection, tmnspmtadon, handling of samples at the analytical laboratory. Equipment blanks are used to determine the effectiveness of decontamination prvcesses of portable equipment used for purging and/or sample collection. 7. Five-Year Review Five-year Reviews were completed in 2001 (Perry et al., 2001), 2W) (Dibley et al., 200 m' and 2011 (Valctt dal., 2011). No issues ordefrcieneies associated will the Eastern GSA Subarea were ideation in the most recent (2011) GSA Five-year Review. 'the Eastem GSA implemented remedy has achieved the degree ofeleanup specified in the ROD Mrall pathways ofexpesure and therefore is protective of human health and the eovues ment. "the close out of the Eastern GSA Subarea of OD i will be discussed in the 2016 GSA OFF Five-Year Review. No variations substances will remain on the Eastern GSA site above levels that w;l Prevent unrestricted use and unrestricted exposure, therefore, furore Five-year Reviews not ran sally for this Subarea of OFF 1 .