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

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RTC for Draft LL1-4 Remedial Action Completion Report Cmt.# Page # Line # Comment cross reference to end of Section 3.2.2. Also, add a statement that indicates the integrity of the sampling, etc. was not compromised. A-13 Page 3-4, Line 18-19 Include a reference to use of temperature blanks A-14 Page 3-4, Line 28 Please clarify what is meant by “RVAAP Water Quality Criteria”? It is unclear as to what is referenced as there is nothing used by that designation. A-15 Page 3-5, Line 19 Does the text indicate that there was some impact from lab contamination? Please clarify if lab contamination is cited. Recommendation Response integrity of the collected groundwater samples were not compromised. Field screening data met the allowable criteria for sampling protocols applicable to the site.” Temperature blanks were sent with each cooler shipped to the laboratory for analysis. The text has been revised to state “Temperature and trip blanks consisting of…….” Shaw’s reference to the “RVAAP Water Quality Criteria” is incorrect. Per an email from Eileen Mohr dated November 7, 2007, Shaw was directed to compare the storm water sample detection results (or detection limits if non-detect) with site-wide surface water background and filtered/unfiltered groundwater. Reference to the “RVAAP Water Quality Criteria” in this section will be revised to state “Surface Water Background Criteria and Summary Statistics for Unconsolidated Zone Filtered/Unfiltered Groundwater Background Wells.” The contaminant concentrations in samples were not attributable to lab contamination. A sentence will be added to the end of the paragraph that states “The contaminant concentrations in samples were not attributable to lab contamination.” A-16 Page 3-10, Line 24 Add “as” after “as best” The text has been revised to read “as best as” as requested. A-17 Page 3-11, Table 3-1 Please confirm the total amount of Non- The actual tonnage transported off- Hazardous Soils excavated. Column site was 9488.63 tons. For report totals 9488 tons. purposes (and in the table), the number was rounded up to get to 9489 tons as shown. The table will be rectified so that the column in question sums to 9489 tons. Shaw Environmental, Inc. 2 of 13 June 20, 2008
RTC for Draft LL1-4 Remedial Action Completion Report Cmt.# Page # Line # Comment Recommendation Response A-18 Page 3-11, Line 22 Delete “and staked” before utilizing The text has been revised to read “were surveyed utilizing….” A-19 Page 3-12, Line 2 Add “and staked” at end of sentence The text has been revised to read A-20 Page 3-15, Table 3-2 Why only 7 samples on Arsenic? Please explain briefly here or cross reference information on lines 12-20 on Page 3-16. A-21 Page 4-4, Table 4-1 and Line 10, Page 4-5, Line 7 A-22 Page 5-2, Section 5.2.3.1 Confirm total of Non-Hazardous Soils on Page 3-11 and make Table 4-1 and Line 10 consistent with Page 3-11. Was the validation performed on 10% of the received data? A-23 Drawing Load Line 1 AOC boundary on drawing should be current fenceline. Please move AOC boundary to fence. A-24 Drawing Load Line 3, “within one foot and staked.” The note under Table 3-2 has been revised to state: “*Based on limited data (only 7 samples submitted for correlation) – See further explanation on next page under “Arsenic”. See response to Comment A-17. Shaw validated 100% of the received data for samples collected during the work prior to inclusion for accuracy. The AOC boundary has been moved as requested on the drawing in the final. Add “to” after this “drawing is”. Note 3 has been revised to say “The Note 3 purpose of this drawing is to….” A-25 Drawing Load Line 3 AOC boundary on drawing should be The AOC boundary has been moved current fenceline. Please move AOC as requested on the drawing in the boundary to fence. final. A-26 Drawing Load Line 4 AOC boundary on drawing should be The AOC boundary has been moved current fenceline. Please move AOC as requested on the drawing in the boundary to fence. final. A-27 Drawing Load Line 4 There is a note next to Bldg G-1A that The note is a remnant from previous says “(3’)”. Please clarify what is meant. Is iterations of the drawing. It will be it a depth of excavation? deleted in the drawing included in the Final version. A-28 Appendix B Tables – In the Winklepeck Burning Ground RI, As requested, on Table B-1, values Table B1 there was no GW Analyses for explosives, under the column “RVAAP propellants, VOCs, SVOCs, etc. By Background” has been revised to “0” default, the concentrations should be set as requested for all analytes with the to zero for background instead of “NS”. exception of metals. This has been Please change the Background carried throughout the entire B-1 concentrations to reflect this. Metal background numbers do not need to be changed. table. A-29 Page 1 of 39, Table B- Change RVAAP Background to zero See response to Comment A-28. Shaw Environmental, Inc. 3 of 13 June 20, 2008
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