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Home My WebLink AboutNC0001422_Ele1Cr6FR-S6_20150805 Duke Energy Laboratory Services 13339 Hagers Ferry Road Bld. MG03A Huntersville, NC 28078 Project ID: Ash Basin GW Assessment – Absolute Properties Hexavalent Chromium EPA Method 218.6 Analytical Report 23952 Element One, Inc. 6319-D Carolina Beach Rd., Wilmington, NC 28412 910-793-0128 FAX: 910-792-6853 e1lab@e1lab.com el1 The following data for Analytical Report 23952 has been reviewed for completeness, accuracy, adherence to method protocol, and compliance with quality assurance guidelines. Review by: Katie Strickland, B.S. Chemist February 26, 2015 Report Reviewed and Finalized By: 4� Ken Smith, Laboratory Director February 26, 2015 eoe entOne 23952 Duke Absolute Properties Cr6 Report Packet Page 2 of 19 elementOne 23952 Duke Absolute Properties Cr6 Report Packet Page 3 of 19 SUMMARY OF RESULTS elementOne 23952 Duke Absolute Properties Cr6 Report Packet Page 4 of 19 Summary of Analysis Summary of Method 218.6 Hexavalent Chromium Analysis Absolute/S6/DW12 23952-3 Element µg/L ----------------- --------------- Chromium (VI) < 0.1 Summary of Standard Method 4500H+ pH Analysis Absolute/S6/DW12 23952-3 Assay SU ----------------- --------------- pH 4.83 Summary of Standard Method 2500 B Temperature Analysis Absolute/S6/DW12 23952-3 Assay °C ----------------- --------------- Temperature 17.9 elementOne 23952 Duke Absolute Properties Cr6 Report Packet Page 5 of 19 ANALYTICAL NARRATIVE elementOne 23952 Duke Absolute Properties Cr6 Report Packet Page 6 of 19 Element One Analytical Narrative Client: Duke Energy Element One #: 23952 Client ID: Ash Basin GW Assessment – Absolute Properties Analyst: PQT, LAW Method: EPA 218.6 Dates Received: 02/25/2015 Analytes: Cr (VI) Dates Analyzed: 02/25-26/2015 Summary of Analysis The samples were collected by Element One, Inc. on 02/25/2015. The samples were analyzed for pH and temperature in the field immediately following sampling. Samples were returned to Element One, Inc. and were prepared and analyzed for chromium (VI) according to SW -846 Method 0061 protocol. Samples were analyzed for chromium (VI) using a Shimadzu 2010 HPLC unit and a Timberline RDR-1 Reaction Module. Detection Limits The Shimadzu 2010 HPLC instrument detection limit for chromium (VI) was 0.1 µg/L. Analysis QA/QC Duplicate analyses relative percent difference (RPD) and sample spike recovery data are summarized in the Quality Control Section. All QA/QC data was within the criteria of the method. Additional Comments The reported results have not been corrected for any blank values or spike recovery values. The reported results relate only to the items tested or calibrated. elementOne 23952 Duke Absolute Properties Cr6 Report Packet Page 7 of 19 QUALITY CONTROL SUMMARY elementOne 23952 Duke Absolute Properties Cr6 Report Packet Page 8 of 19 Summary of Quality Control Data 218.6 Sample Spike Recovery (QC limits: 90-110% for Recovery) Absolute/S6/DW12 23952-3 Element Recovery ----------------- --------------- Chromium (VI) 102% elementOne 23952 Duke Absolute Properties Cr6 Report Packet Page 9 of 19 SAMPLE CUSTODY elementOne 23952 Duke Absolute Properties Cr6 Report Packet Page 10 of 19 elementOne 23952 Duke Absolute Properties Cr6 Report Packet Page 11 of 19 ANALYTICAL DATA elementOne 23952 Duke Absolute Properties Cr6 Report Packet Page 12 of 19 Analytical Calculations Chromium (VI)- Chromium (VI) (µg/L) = HPLC Results (µg/L)*Dilution Where- HPLC Results = Raw sample concentration (ppb)—HPLC -Data Sheet Dilution= Diluted Volume--HPLC Run Sheet Aliquot elementOne 23952 Duke Absolute Properties Cr6 Report Packet Page 13 of 19 Analytical Calculations Spike Recovery- Spike (%) = (Spiked Result (µg/L) – Sample Result (µg/L)) X100 Spike Amount (µg/L) Where- Spike Result = Raw sample concentration (ppb)--HPLC-Data Sheet Sample Result = Raw sample concentration (ppb)--HPLC-Data Sheet Spike Amount-- HPLC-Data Sheet Duplicate Analysis RPD- RPD (%) = (Duplicate Result (µg/L) - Sample Result (µg/L)) X100 Average (µg/L) Where- Sample Result and Duplicate Results=Raw sample concentration (ppb) -- HPLC- Data Sheet Average= (Duplicate + Sample Results) 2 elementOne 23952 Duke Absolute Properties Cr6 Report Packet Page 14 of 19 elementOne 23952 Duke Absolute Properties Cr6 Report Packet Page 15 of 19 elementOne 23952 Duke Absolute Properties Cr6 Report Packet Page 16 of 19 elementOne 23952 Duke Absolute Properties Cr6 Report Packet Page 17 of 19 elementOne 23952 Duke Absolute Properties Cr6 Report Packet Page 18 of 19 elementOne 23952 Duke Absolute Properties Cr6 Report Packet Page 19 of 19