Document 7ROnzYKG1n5oaLp03pZvMx7n8

AR226-2625 13 PMD AR226-2625 DuPont Engineering Barley Mill Plaza-BIdg. 27 4417 Lancaster Pike Wilmington.DE 19805 October 19,2004 Mr.ToddKelleher Environmental Supervisor Chemical Monitoring Compliance Unit Ohio Environmental Protection Agency Columbus, Ohio 43216-1049 Earnhart Hills Public Water System Circleville, Ohio Dear Mr. Kelleher: On August 30,2004, groundwater from the Earnhart Hills Public Water System was sampled and perfluoroocianoic acid (PFOA) concentrations determined. Groundwater sampled included an after treatment sample, a duplicate after treatment sample, a before treatment sample, and four production well samples (W3 through W6). All PFOA results were non-detectable (ND; 0.01 ug/L). Please contact me at (302) 992-6820, if you have any questions. Sincerely, Andrew S. Hartten Project Director cc: James Riley Steve Williams Mary Dominiak Andrea V. Malinowski David W. Boothe Dennis Williams Attachments E.I. du Font de Nemours and Company Earnhart Hills Public Water System Circleville, Ohio CVL-EHWC-AT CVL-EHWC-AT (DUP) CVL-EHWC-BT CVL-EHWC-W3 CVL-EHWC-W4 CVL-EHWC-W5 CVL-EHWC-W6 After Treatment After Treatment Before Treatment Production Well Production Well Production Well Production Well 8/30/2004 8/30/2004 8/30/2004 8/30/2004 8/30/2004 8/30/2004 8/30/2004 ND(<0.01) ND(<0.01) ND(<0.01) ND(<0.01) ND(<0.01) ND(<0.01) ND(<0.01) 10/19/2004 Page 1 of 1 Circleville.xis RESEARCH Fluprochemical Characterization of Water Sam pies Analytical Results DuPont Sample Identification Exygen Research Sample Identification Collection Date CVL-EHWC-AT '.. L0003262-1 30-Aug-04 * APFO - ammonium perfluorooctanoate (also referred to as FC-143 and C8) ** ug/L - micrograms/liter (parts per billion) APFO* (pg/L-) ND DEFINITIONS: Limit of Detection (LOD) for the procedure is approximately 0.010 ug/L Limit of Quantitation (LOQ) for the procedure is 0.050 ug/L ND - Compound not detected NQ - Compound detected at a level between the LOD and LOQ. Result is not quantifiable. Relative values: ND < LOD < NQ < LOQ \ RESULTS ARE CALCULATED ACCORDING TO THE FOLLOWING CRITERIA: All samples were analyzed in duplicate. If the sample and laboratory duplicate are greater than 0.250 pg/L, and the relative percent difference (RPD) is less than 20, the average value is reported. If the RPD is greater than,20, the higher value is reported. If the sample and laboratory duplicate are less than 0.2,50 ug/L, and the absolute difference is less than 50, the average value -is reported:-.If the absolute difference is greater than 50, the higher value is reported. SUBMITTED BY: 2i ^ ffL&ff^ ./-Oohn M. Flaherty, Operations Manager 18-0ct-04 Date . 3058 Research Drive State College,PA 16801, USA T: 800.281.3219 F: 814.272.1019 exygen.com RESEARCH Fluprochemical Characterization of Water Samples Analytical Results DuPont Sample Identification Exygen Research Sample Identification Collection Date CVL-EHWC-BT .. L0003262-2 30-Aug-04 * APFO - ammonium pe.rfluorooctanoate (also referred to as PC-143 and C8) ** ijg/L - micrograms/liter (parts per billion) APFO* dig/I,-) ND DEFINITIONS: Limit of Detection (LOD) for the procedure is approximately 0.010 ug/L Limit of Quantitation (LOQ) for the procedure is 0.050 ug/L ND - Compound not detected NQ - Compound detected at a level between the LOD and LOQ. Result is not quantifiable. Relative values: ND < LOD < NQ < LOQ , RESULTS ARE CALCULATED ACCORDING TO THE FOLLOWING CRITERIA: All samples were analyzed in duplicate. If the sample and laboratory duplicate are greater than 0.250 ug/L, and the relative percent difference (RPD) is less than 20, the average value is reported. If the RPD is greater than,20, the higher value is reported. If the sample and laboratory duplicate are less than 0.2.50 ug/L, and the absolute difference is less than 50, the average value is reported-.. If the absolute difference is greater than 50, the higher value is reported. SUBMITTED BY: <^f /J^f^ ff? ^dohn M. Flaherty, Operations Manager 18-0ct-04 Date \ 3058 Research Drive State College, PA 16801, USA T: 800.281.3219 F: 814.272.1019 exygen.com RESEARCH Fluprochemical Characterization of Water Sam pies Analytical Results DuPont Sample Identification Exygen Research Sample Identification Collection Date CVL-EHWC-AT-DUP L0003262-3 30-Aug-04 * APFO - ammonium perfluorooctanoate (also referred to as FC-143 and C8) ** (jg/L - micrograms/liter-(parts per billion) APFO* (pg/L-) ND DEFINITIONS: Limit of Detection (LOD) for the procedure is approximately 0.010 ug/L Limit of Quantitation (LOQ) for the procedure is 0.050 ug/L ND - Compound not detected NQ - Compound detected at a level between the LOD and LOQ. Result is not quantifiable. Relative values: ND < LOD < NQ < LOQ \ RESULTS ARE CALCULATED ACCORDING TO THE FOLLOWING CRITERIA: All samples were analyzed in duplicate. If the sample and laboratory duplicate are greater than 0.250 ug/L, and the relative percent difference (RPD) is less than 20, the average value is reported. If the RPD is greater than-,20, the higher value is reported. If the sample and laboratory duplicate are less than 0.250 ug/L, and the absolute difference is less than 50, the average value is reported;. If the absolute difference is greater than 50, the higher value is reported. SUBMITTED BY: /i&f^ C?Z.^f ^<fohnM. Flaherty, Operations Manager 18-0ct-04 Date 3058 Research Drive State College, PA 16801, USA T: 800.281.3219 F: 814.272.1019 exygen.com ^ RESEARCH ^kP^.rPereccisisee Research. '-. Proven Results. Fluprochemical Characterization of Water Sam pies Analytical Results DuPont Sample Identification Exygen Research Sample Identification Collection Date CVL-EHWC-W3 \, L0003262-4 30-Aug-04 * APFO - ammonium perfluorooctanoate (also referred to as FC-143 and C8) ** |jg/L - micrograms/liter(parts per billion) APFO* (pg/L^) ND DEFINITIONS: Limit of Detection (LOD) for the procedure is approximately 0.010 ug/L Limit of Quantitation (LOQ) for the'procedure is 0.050 ug/L ND - Compound not detected NQ - Compound detected at a level between the LOD and LOQ. Result is not quantifiable. Relative values: ND < LOD < NQ < LOQ , RESULTS ARE CALCULATED ACCORDING TO THE FOLLOWING CRITERIA: All samples were analyzed in duplicate. If the sample and laboratory duplicate are greater than 0.250 ug/L, and the relative percent difference (RPD) is less than 20, the average value is reported. If the RPD is greater than-,20, the higher value is reported. If the sample and laboratory duplicate are less than 0.250 ug/L, and the absolute difference is less than 50, the average value is reported;. If the absolute difference is greater than 50, the higher value is reported. SUBMITTED BY: 2^^ & & , _ _ _ _ ^dohn M. Flaherty, Operations Manager 18-0ct-04 Date \ 3058 Research Drive ' State College, PA 16801, USA 'T: 800.281.3219 F: 814.272.1019 exygen.com RESEARCH ^..Precise Research. '. Proven Results. Fluprochemical Characterization of Water Sam pies Analytical Results DuPont Sample Identification Exygen Research Sample Identification Collection Date CVL-EHWC-W4 \ L0003262-5 30-Aug-04 * APFO - ammonium pe.rfluorooctanoate (also referred to as FC-143 and C8) ** |jg/L - micrograms/Iiter (parts per billion) APFO* (ljg/L^) ND DEFINITIONS: Limit of Detection (LOD) for the procedure is approximately 0.010 ug/L Limit of Quantitation (LOQ) for the procedure is 0.050 ug/L ND - Compound not detected NQ - Compound detected at a level between the LOD and LOQ. Result is not quantifiable. Relative values: ND < LOD < NQ < LOQ , RESULTS ARE CALCULATED ACCORDING TO THE FOLLOWING CRITERIA: All samples were analyzed in duplicate. If the sample and laboratory duplicate are greater than 0.250 ug/L, and the relative percent difference (RPD) is less than 20, the average value is reported. If the RPD is greater than.20, the higher value is reported. If the sample and laboratory duplicate are less than 0.250 ug/L, and the absolute difference is less than 50, the average value is reported. If the absolute difference is greater than 50, the higher value is reported. SUBMITTED BY: 21. ^ .^SL^T^ ;^<TohnM. Flaherty, Operations Manager 18-0ct-04 Date 3058 Research Drive State College, PA 16801, USA J: 800.281.3219 F: 814.272.1019 exygen.com RESEARCH Fluprochemical Characterization of Water Sam pies Analytical Results DuPont Sample Identification CVL-EHWC-W5 \ Exygen Research Sample Identification L0003262-6 Collection Date 30-Aug-04 * APFO - ammonium perfluorooctanoate (also referred to as FC-143 and C8) ** pg/L - micrograms/liter (parts per billion) APFO* (pg/L^) ND DEFINITIONS: Limit of Detection (LOD) for the procedure is approximately 0.010 ug/L Limit of Quantitation (LOQ) for the''procedure is 0.050 ug/L ND - Compound not detected NQ - Compound detected at a level between the LOD and LOQ. Result is not quantifiable. Relative values: ND < LOD < NQ < LOQ , RESULTS ARE CALCULATED ACCORDING TO THE FOLLOWING CRITERIA: All samples were analyzed in duplicate. If the sarhple and laboratory duplicate are greater than 0.250 ug/L, and the relative percent difference (RPD) is less than 20, the average value is reported. If the RPD is greater than-,20, the higher value is reported. If the. sample and laboratory duplicate are less than 0.250 ug/L, and the absolute difference is less than 50, the average value is reported-- If the absolute difference is greater than 50, the higher value is reported. SUBMITTED BY: Mi^ i ^ ^ohn M. Flaherty, Operations Manager 18-0ct-04 Date'.. 3058 Research Drive State College, PA 16801, USA ,T: 800.281.3219 F: 814.272.1019 exygen-com RESEARCH Fluprochemical Characterization of Water Sam pies Analytical Results DuPont Sample Identification Exygen Research Sample Identification Collection Date CVL-EHWC-W6 \ L0003262-7 30-Aug-04 *APFO - ammonium p'erfluorooctanoate (also referred to as FC-143 and C8) ** [jg/L - micrograms/liter-(parts per billion) APFO* (pg/L-) ND DEFINITIONS: Limit of Detection (LOD) for the procedure is approximately 0.010 ug/L Limit of Quantitation (LOQ) for the procedure is 0.050 ug/L ND -- Compound not detected NQ - Compound detected at a level between the LOD and LOQ. Result is not quantifiable. Relative values: ND < LOD < NQ < LOQ \ RESULTS ARE CALCULATED ACCORDING TO THE FOLLOWING CRITERIA: All samples were analyzed in duplicate. If the sample and laboratory duplicate are greater than 0.250 ug/L, and the relative percent difference (RPD) is less than 20, the average value is reported. If the RPD is greater than.20, the higher value is reported. If the sample and laboratory duplicate are less than 0.250 ug/L, and the absolute difference is less than 50, the average value is reported'. If the absolute difference is greater than 50, the higher value is reported. SUBMITTED BY: d^f^ 21 ^ ^<3ohn M. Flaherty, Operations Manager 18-0ct-04 Date '.. 3058 Research Drive State College, PA 16801, USA T: 800.281.3219 F: 814.272.1019 exygen.com