Final Data Report for the Vieques Island Biota Sampling Project

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NOAA ORR andRIDOLFI Inc.Final Data Report for theVieques Island Biota Sampling ProjectJuly 2006 Page 16location were collected two weeks after the other samples. Such temporal adjustments areslight and are not expected to affect the analytical results.• The land crab generally were collected over a span of several hours rather than overnight.• Although the sampling effort was extended, fiddler crab were not collected at the BlueHorizon (Area 13) reference location because suitable habitat was lacking.• Mosquito Bay (Area 7) was sampled instead of Sun Bay because of permitting issues.The Mosquito Bay sample location is believed to be similar to Sun Bay and a recruitinghabitat for land crab.• The sample area referred to in the SAP as Laguna Arenas was moved to the south end ofLaguna Kiani at the request of the USFWS; the name of the sample area was thereforechanged to Laguna Kiani South (Area 4).2.3 Quality Assurance SummaryAnalytical data quality was evaluated both by the laboratory and independently, as specified inthe quality assurance project plan (QAPP). The independent review and the validation oflaboratory data packages were performed by Validata, LLC, of Seattle, Washington. Anadditional review of explosive compounds data was performed by D.M.D., Inc., of Vashon,Washington. The validated laboratory data appear in Appendix B. Data validation reports andassociated memoranda are included as Appendix C. A summary quality assurance report isincluded as Appendix D.Laboratory results were either accepted as received (unqualified) or were qualified. No resultswere rejected. Unqualified results are considered valid with respect to the specified proceduresand QA/QC measures and may be used as intended. Results qualified with a J flag are consideredusable with the understanding that the associated values are estimates because they are so nearthe sample-specific method detection limit (MDL). Certain pesticide and PCB results wereflagged by the laboratory as JP, indicating that the result is less than the method reporting limitand that the gas chromatography (GC) confirmation criteria were not met. Data with the JP flaghave more associated uncertainty and should be used with caution. The data validation report(Appendix C) defines the data qualifiers.Vieques_Crab_Sampling_Rpt_final_060725.doc
NOAA ORR andRIDOLFI Inc.Final Data Report for theVieques Island Biota Sampling ProjectJuly 2006 Page 17The principal measures associated with data quality are precision, accuracy, representativeness,completeness, and comparability. An evaluation of each of these measures determined that overallanalytical performance and data quality are acceptable (see Appendix D for more detail).During data evaluation, it became evident that trace element analyses associated with onepreparation batch of land crab exoskeletons actually represented crab soft tissue, not theexoskeleton. Archived samples from this batch were reprepared and reanalyzed; the revised resultsare consistent with other exoskeleton results. Details regarding reanalysis of the land crabexoskeleton samples are provided in Appendix G.Vieques_Crab_Sampling_Rpt_final_060725.doc
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Page 85: Carlos M. GutierrezSecretary, U.S.

Final Data Report for the Vieques Island Biota Sampling Project

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