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

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Cmt.# A-19 Page # Line # Appendix F, Section 2.5, Pg 2-3 New Page or Sheet Section 2.6, Pg 2-3, Line 19-20 Comment Were all in-house QC limits met? A-20 General Some minor typo and spelling throughout. A-21 3-2 Section 3.2, Pg 3-2, Lines 24-26 A-22 3-4 Pg 3-4 to 3-7 Recommendation Response 2.4 Explosives - A total of 17 multiincrement samples were submitted for explosives analysis to TestAmerica; thirteen samples for 2,4,6-Trinitrotoluene (TNT) and four soil samples for RDX analyses. 2.5 Propellants - Five soil samples were submitted to TestAmerica for nitroguanidine, nitroglycerine and nitrocellulose analysis.” Include a statement. A sentence will be added to this section that states the following: “All LCG and non-LCG QC (propellants) outliers were within the allowable limits.” Read through again. Report will be subjected to another QC review for typographical and spelling errors. USACE (Rick Hockett, Rec’d 27 Mar 2008) Section 3.2. Groundwater monitoring should have been performed in accordance with the 2004 document Facilitywide Groundwater Monitoring Program Plan. USACE had several conversations with Shaw personnel prior to the sampling event and explained these details. Section 3.2.8. Background values for inorganic compounds have been developed for RVAAP. Shaw Environmental, Inc. 13 of 39 Please verify that the FWGWMP requirements were followed, and state this in the text. Include a discussion of the relation of the detected inorganic compounds with the RVAAP background levels. The last sentence in Section 3.2 will be revised as follows: “Groundwater sampling activities were performed in accordance with the requirements of the Facility-wide Sampling and Analysis Plan (FSAP; SAIC 2001), the FWGWMP Plan (USACE 2004), and the Shaw Field Sampling Plan (FSP; Shaw 2006b).” Discussion regarding a comparison of the detected inorganic compounds to RVAAP background levels will be included in Section 3.2.8 as follows:
Cmt.# Page # Line # New Page or Sheet Comment Shaw Environmental, Inc. 14 of 39 Recommendation Response 3.2.8.4 Inorganics In addition to MCLs and Region 9 PRGs, the inorganics detected above the laboratory reporting limits were compared to facility-wide background criteria for filtered groundwater. Calcium, magnesium, iron, potassium and sodium were eliminated from this discussion as potential on-site contaminants because they are considered essential nutrients. The following inorganic elements were detected above the reporting limits and applicable background levels: • Dissolved Arsenic – LL1mw081 (0.00102 mg/L), LL1mw082 (0.00191 mg/L), LL1mw085 (0.000427 mg/L), LL2mw262 (0.000313 mg/L J and 0.000268 mg/L J), LL2mw263 (0.0104 mg/L), LL2mw266 (0.00488 mg/L and 0.00554 mg/L), LL2mw267 (0.00438 mg/L), LL2mw269 (0.000623 mg/L J), LL3mw236 (0.000277 mg/L J), LL3mw238 (0.000434 mg/L J), LL3mw239 (0.000981 mg/L J), LL4mw196 (0.00709 mg/L J), LL4mw197 (0.000268 mg/L J) and LL4mw198 (0.000421 mg/L J); • Dissolved Antimony – LL1mw067 (0.00088 mg/L),
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