Document jNyeDKmaOvp1Y8xmDVebmx6rR

AR226-2601 om < CN r- <N CD <OD ASH02B045 EXD781325 EID781325 i i Objectives Provide grounding/update on recent activities Solicit input on upcoming activities mg M H otv> 09 O cn EID781326 : Agenda Water - GIST Final Report Recommendations - Proposed MOU Based on GIST Recommendations - OEPA Requests - DuPont Suggested Modifications Air - Review Recent Model Results - Air Permit Update - Additional Reduction Programs - Air Model Verification Plan ASHQ2B047 Proposed Memorandum of Understanding-W est Virginia DEP and Ohio EPA Sas W H a-a CD H UND) GO aN3 WoCD aH a CO H UIO) CO Summary of Activities December 2, 2003 S MOH a-oej, H WHa"J *o N*U0J) GO CNOJ 10' GIST Report Recommendations Summary Final GIST report issued August, 2003 Continued quarterly/annual monitoring of certain Ohio River public water systems Quarterly/annual monitoring of private water supplies (10 locations) in West Virginia and Ohio - West Virginia: Wash Works 0-2 mile radius and Dry Run Landfill/Letart Landfill I-mile radius - Ohio: Wash Works 0-2 mile radius - List to include wells, springs, cisterns Conduct C8 monitoring at all DuPont Washington Works facilities according to applicable West Virginia Solid Waste/NPDES, NPDES, and EPA HSWA (Corrective Action) permit requirements EID781330 i s w H aoK9 03 O cn o Proposed MOU inistrative Details Parties: -- West Virginia Department of Environmental Protection -- West Virginia Department of Health and Human Resources -- Ohio Environmental Protection Agency -- E.L du Pont de Nemours & Company Objectives: -- Continued monitoring and reporting of C8 concentrations in groundwater and surface water -- Implement recommendations of the GIST concerning continued sampling and monitoring in WV & Ohio ("in and around the facilities") -- Begin first quarter 2004 Proposed MOU -Public Water System Sampling WV Public W ater Systems: - Quarterly sampling 1Q20G4-4Q2OO5 at Lubeck PSD, DuPont WW, and GE production wells and finished water (if applicable) - Annual sampling 2004-2005 at Blennerhassett Island State Park, Mason Cty. PSD, and Racine L&D Ohio Public W ater Systems: - Quarterly sampling 1Q2004-4Q2005 at Little Hocking Water Association production wells and finished water - Annual sampling of Tappers Plains-Chester PWS n H Oto' o-J 0 oH PHI oWm W w CO' Nu two Proposed MOU -Private Water Supply SaiII pling W est Virginia: - Quarterly sampling for 1 year beginning 1Q2004 at locations within Wash Works facility 0-2 mile radius - 10 samples with at least 1 sample being from the following locations with detectable levels of C8: iDrinking water wells iDrinking water springs . Non-drinking water wells : Springs and cisterns iOne well and spring used for cattle where prior sampling detected C8 concentrations above 5 ug/L - Further sampling/frequency beyond 4Q20Q4 will be evaluated by parties to the MOU EID781333 a o H w CoO ww Proposed MOU -Private Water Supply SaiIf p lin g Ohio: - Quarterly sampling for 1 year beginning 1Q2004 at locations within Wash Works facility 0-2 mile radius - 10 samples with at least 1 sample being from the following locations with detectable levels of C8: Drinking water wells Drinking water springs Non-drinking water wells Springs and cisterns. - Further sampling/frequency beyond 4Q2004 will be evaluated by parties to the MOU & ss o SA <U ss CT1 CU ci -c Pm SHQ28054 EID781334 EID781334 OEPA Request for Additional Investigation OEPA letter to DuPont dated October 23, 2003 Objective: --Better understand the range o f C8 concentrations in surface soil and shallow groundwater, and how these concentrations change over time w uwUjl Proposed Additional Investigation in Ohio -Little Hocking and Porterfield Areas Establish 8 locations for surface soil sampling in these areas based on results of air and groundwater modeling Install 4 new shallow groundwater monitoring wells within the LHWA to monitor shallowest portion o f aquifer. Sample quarterly in conjunction with production well sampling. & w Ho *4 0 H* Wolov a o HowOCOoD)t'' CO w wcn Proposed Additional Investigation on Ohio -Little Hocking and Porterfield Areas DuPont Suggested Modifications Establish 8 locations for surface soil sampling in these areas based on results of air and groundwater modeling: -- Two sampling events will be conducted, one directly after a >.5 inch rain event, the other after 5 days of no precipitation. During each event, the following samples will be collected: * Foliage layer sample (grass and root zone) * Surface soil sample (depth interval to be determined) Install 4 new shallow groundwater monitoring wells within the LHWA to monitor shallowest portion of aquifer. Sample quarterly in conjunction with production well sampling. Path Forward Execute MOU covering GIST recommendations Gain agreement on OEPA proposal and DuPont suggestions Propose the additional testing (OEPA proposal and DuPont suggestions) at the ECA process on December 9 i Air Topics Modeling Results Sept 2002 - Aug 2003 Air Permit Update Additional Reduction Programs Air Modeling Verification Project - Phase I: Fence Line Monitoring - Phase II: Community Monitoring UKJ U) 1U0> ASH028059 i: Modeling Methodology 1 EPA's Industrial Source Complex 3 (ISCST3) Model Followed procedures in EPA's Guideline on Air Quality i Models (Appendix W) ! * BPIP model to evaluate building downwash effects Terrain elevations imported from USGS electronic file Receptor grid with 100-meter spacing i On-site met data (1996) i Rural dispersion coefficients gao N> W O (71 O EID781340 Modeling Inputs - Stack Parameters O M09 O Qi iCtO* 71E&71F 699 THi 652 THG658 r_ CDT231 CDW 232 CEH242 CFS 274 CFK268 T IV 6 9 7 T1F 604 R022EEF6 r R022EEF86 ! R022EEF87 R022EEF89 442091 441920 441923 441953 441952 441954 441787 441774 442129 442104 442008 442069 442058 442063 4346836 4346767 4346756 4346766 4346776 4346741 4346744 4346753 4346836 4346822 4346624 | 4346627 ] 4346634 4346635 4 1.96 163 0.67 0.67 0.5 0.69 0.27 .1.67 1.67 2.5 2 2 2 170 70 68 81 93 114.5 110 72.5 45 45 47 49 49 49 27.9 54.1 22.4 28.4 23.6 106.1 44.6 29.1 15.2 15.2 30 40 10 20 124 200 300 130 130 200 255 110 66 66 80 80 80 80 Emissions from Sept 2002- Aug 2003 = 7,120 Ib/yr EID781341 Summary of Modeling Results Emissions Scenario Year 2000 Actual Year 2002 Actual Sept 2002-Aug 2003 Maximum Annual Average Concentration (ug/m3) 2,67 1.36 0.86 Maximum Annual Average Concentration in Ohio (ug/m3) 0.87 0.36 0.18 September 2002 - August 2003 Emissions ASH02B063 Air Permit Status Four permits cover APFO sources Each permit has been modified to place APFO emission limits on each emitting unit Emission limits are hourly and annual Emission limits were confirmed via air dispersion modeling to assure annual ambient air concentrations below 1 ug/m3 at fence line Future changes must not exceed the same fence line limit, demonstrated by modeling Permit modifications effective November 26, 2003 Emission limits will be included in Title V permit ' I Additional Air Reduction Programs I I Continuing operational upgrades to five ] ; existing scrubbers - instrumentation, interlocks, operating conditions : May, 2004 startup of additional filter : I scrubbers on four existing scrubbers I - builds on technology recently developed on one s scrubber at Washington Works o : --testing of potentially more efficient filter media EID78X345 Air Dispersion Modeling Verification Study si U3 GO ai U) o\ ASH02B066 Objective Compare results from ambient air sampling and air dispersion modeling to understand how modeling predictions relate to measured ambient air concentrations B H tXoo H CoD EID781347 Verification Study Scope Air Sampling Program Analytical Methods Modeling Analysis of Results w wo H N CD O 00 EID781348 Conducted in Two Phases Phase I: Verification of modeling at facility fence line Phase II: Verification of modeling in community U> GO to HW> to ASH02B069 Phase I: Air Sampling Locations Simultaneous coverage of all 4 major wind directions (N, S, E, W) Capture point of predicted maximum concentration from modeling Include co-located samplers at predicted maximum Total of six locations ASH02870 UU o cwn o T ST8,aia ise i8 aia T0820HSV ASH028072 EID781352 EID781352 Air Sampling Strategy Measure ambient air levels 24-hour sampling duration Seven (7) sampling events scheduled over 6 weeks Vary day of week to capture variations in daily operations (none expected) and variations in meteorology Record site-specific meteorological and operational data OwJ 00 utn> ASB028074 Monitoring Strategy: Samples taken every 6 days for 6 weeks. MONTH 1 ~ 0 2 3 4 5 6 ( 7) 8 9 10 11 1l2(j? ) l4 15 16 17 1 8 ^ ^ 2 0 21 22 23 2( 25) 26 27 28 29 3<(2j) MONTH 2 12 3 4 5( 7 ) 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Total Samples (1) field blank per event (5) primary samples per event (1) duplicate sample per event* (7) samples x (7) sampling events = 49 total samples * Sampie location 3 is co-located with location 2 and serves as a duplicate sample I1 Equipment i I "Sorbent" sampling method to capture PFOA on ion-exchange media OSHA Versatile Sampling tube (OVS) | Captures particles and vapors Remote power source will be provided Weatherproof stations for sampling I i equipment oj EID781356 -I < ASH02B77 EXD781357 EID781357 Analytical Method Validated method being used Acetone extraction followed by liquid chromatography/mass spectrometry (LC/MS) Quantification limit of 0.1 ug/m3 Detection limit of 0.05 ug/m3 iWn CO oo U) GO ASH028Q78 Modeling Program Using U.S. EPAISCST3 Model Model will simulate actual field conditions - Site-specific surface meteorological data (wind speed and i direction, temp, stability) I - Off-site upper air meteorological data - Emissions data | - 24-hour averaging time j - Predictions at actual height and location o f air monitoring i intake ASH028079 W i*n0 -J CO in  Comparison of Results Ji Comparing 35 pairs of measured and modeled data - (5) primary sampling points x (7) sampling events Will use statistical tools to evaluate correlation/differences between measured and modeled data ASH028080 <TV Phase II: Verification of Modeling in Community Sampling and analytical protocol same as Phase 1 Locations will be selected to: --Correspond with a range o f predicted concentrations --Ensure security o f sample Sampling frequency --Expect 8 events at 5 locations during a six week period ASH028081 to 0V 00 W Path Forward Conclude Phase I monitoring, modeling, and evaluation - 1Q04 Begin Phase II effort - 2Q04 U3 -0J0 to 0O* SH028082 Summary of Path Forw ard Items Water - Execute MOU covering GIST recommendations - Gain agreement on OEPA proposal and DuPont suggestions - Propose the additional testing at the ECA process on December 9 Air - Conclude Phase I monitoring, modeling, and evaluation - 1Q04 - B e g in Phase II effort - 2Q04 f - -J. U> CO 0U1) w(-> w ASH028083