Document 3NGnbODowRd5NYrNKbdep9bLa

AR226-2601 Ohio EPA December 2,2003 'W' Objectives Provide grounding/update on recent activities Solicit input on upcoming activities '^-^--s^-s-ss ^,^f 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 Proposed Memorandum Understanding-West Virg DEP and Ohio EPA Summary of Activities December 2, 2003 '^^' GIST Report Recommendations Summary Final GIST report issued August, 2003 Continued quarterly/annual monitoring of certain Ohio River water systems Quarterly/annual monitoring of private water supplies (10 loca West Virginia and Ohio - West Virginia: Wash Works 0-2 mile radius and Dry Run Landfill/Letart Landfill 1-mile radius - Ohio: Wash Works 0-2 mile radius - List to include wells, springs, cisterns Conduct C8 monitoring at all DuPont Washington Works faci according to applicable West Virginia Solid Waste/NPDES, N and EPA HSWA (Corrective Action) permit requirements hV~'WSsy^ ^ Proposed MOU -Administrative Details Parties: - West Virginia Department of Environmental Protection - West Virginia Department of Health and Human Resour - Ohio Environmental Protection Agency - E.I, du Font de Nemours & Company Objectives: - Continued monitoring and reporting of C8 concentration gromidwater and surface water - Implement recommendations of me GIST concerning co sampling and monitoring in WV & Ohio ("in and around facilities") - Begin first quarter 2004 g g 5 " ^ 5 S I-1 .j " ro ljL U} U) Proposed MOU -Public Water System Samplin WV Public Water Systems: - Quarterly sampling 1Q2004-4Q2005 at Lubec DuPont WW, and GE production wells and fin water (if applicable) - Annual sampling 2004-2005 at Blemierhassett State Park, Mason Cty. PSD, and Racine L&D Ohio Public Water Systems: - Quarterly sampling 1Q2004-4Q2005 at Little H Water Association production wells and finish - Annual sampling ofTuppers Plains-Chester PW gg " 5,g wr- ^coJ. Iri i- M ^ Proposed MOU -Private Water Supply Sampli West Virginia: - Quarterly sampling for 1 year beginning 1Q2004 at locat within Wash Works facility 0-2 mile radius - 10 samples with at least 1 sample being from the followin locations with detectable levels ofC8: (Drinking water wells 1 Drinking water springs . Non-drinking water wells : Springs and cisterns ; One well and spring used for cattle where prior samp detected C8 concentrations above 5 ugfL - Further sampling/frequency beyond 4Q2004 will be evalu parties to the MOU Proposed MOU -Private Water Supply Sampl Ohio: - Quarterly sampling for 1 year beginning 1Q200 locations within Wash Works facility 0-2 mile - 10 samples with at least 1 sample being from th following locations with detectable levels ofC8 Drinking water wells Drinking water springs Non-drinking water wells Springs and cisterns. - Further sampling/frequency beyond 4Q2004 wi evaluated by parties to the MOU \^ OEPA Request for Additio Investigation S3" " N H 0 -M,60 0 ^ M W " 00 u> {-I 01 u w 01 OEPA Request for Additional Investigation OEPA letter to DuPont dated October 2003 Objective: - Better understand the range ofC8 concentrations in surface soil and shallo groundwater, and how these concentratio change over time Proposed Additional Investigation in O -Little Hocking and Porterfield Areas Establish 8 locations for surface soil sampling in the areas based on results of air and grouindwater mode Install 4 new shallow groundwater monitoring wells the LHWA to monitor shallowest portion of aquifer Sample quarterly in conjunction with production we sampling. s 0 o ?^ H Ul 3" U? 00 u ,.; o y trf CTt 0 Ko '5' 2 1-1 ui o-i --3 U) 00 U -1 u W -1 Proposed Additional Investigation on -Little Hocking and Porterfield Are DuPont Suggested Modifications Establish 8 locations for surface soil sampling in these areas b results of air and groimdwater modeling: - Two sampling events will be conducted, one directly after inch rain event, the other after 5 days of no precipitation. 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 th 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 an DuPont suggestions Propose the additional testing (OEPA proposal and DuPont suggestions) at t ECA process on December 9 VH S M 0 M ?^ H 01 3' Ul 00 ui .S 10 y w ID Air Topics Modeling Results Sept 2002 - Aug 20 Air Permit Update Additional Reduction Programs Air Modeling Verification Project - Phase I: Fence Line Monitoring - Phase II: Commimity Monitoring Modeling Methodology EPA^s Industrial Source Complex 3 (ISCST3) Mo Followed procedures in EPA's Guideline on Air Q Models (Appendix W) BPIP model to evaluate building downwash effect Terrain elevations imported from USGS electroni Receptor grid with 100-meter spacing On-site met data (1996) Rural dispersion coefficients Modeling Inputs - Stack Paramete Emissions from Sept 2002- Aug 2003 = 7,120 Ib/yr Summary of Modeling Resu Emissions Scenario Year 2000 Actual Year 2002 Actual Sept 2002 - Aug 2003 Maximum Annual Average Concentratfon (ug/m3) 2.67 1.36 0.86 Maximum Annual Ave Concentration in Ohio 0.87 0.36 OJ 8 September 2002 - August 2003 Emissions H&BBWEsKsfifaisasa^aaBaaimB!B^aaiK^aS^iaaias^iyisK, ^^i c6sssala.EtsaafllffiKBSBW?3;&K>^ iffiMiB^iaiffi^siiBiK&^^^^^^^^niflfiaBBiii^ai ag;i-]s-aa'a@5aagsfflw2<itQtgr?aif! ssa^^faaa^a^s^ai,a^sB^ssiaE't;BliBl^l8KliS?l^a ii^g^s^^a^a^^a^aBBwraBBeswesaiiBRipifsSi..^, ae^.a^iB^BS^Raisii'Baa.as^.^.t-r'--' ^&KaMgi!ffllaailKBaa?SBs^Fq|fi.HBaaasKaa^^^ 'a^i^riS^aaas^eEaiiaaKaas^aEa^asssa^^Saaiis^s:^ BiBiaa^aFi^aaBaaaBMBB^^f^^^B)^:^^-:^^^^^^^^ vsss s.s'i.'isaBBaaiiiBBsiiaBBMBaeasm^Ka^&ifsii^i-aaiseig^^ a^^KiaBaEBBnBniEaBsaMBByji'B'By.s^gs^^aaiaw^'^a-a^ s^<^aHiBBiia^R!iE-s%BSHr^2ai^a@^a^52^ai^^^^^^^ Air Permit Status Four permits cover APFO sources Each permit has been modified to place AP emission limits on each emitting unit Emission limits are hourly and annual Emission limits were confirmed via air dis modeling to assure annual ambient air concentrations below 1 ug/m3 at fence line Future changes must not exceed the same f line limit, demonstrated by modeling Permit modifications effective November 2 Emission limits will be included in Title V Additional Air Reduction Prog Continuing operational upgrades to fi existing scmbbers - mstrumentation, interlocks, operating conditions May, 2004 startup of additional filter scmbbers on four existing scrubbers - builds on technology recently developed scrubber at Washington Works - testing of potentially more efficient filte Air Dispersion Modeling Verification Study Objective Compare results from ambient air samplin dispersion modeling to understand how mo predictions relate to measured ambient air concentrations '^^' Verification Study Scope Air Sampling Program Analytical Methods Modeling Analysis of Results Conducted in Two Phase Phase I: Verification of model at facility fence line Phase II: Verification ofmode in community -i.^.a.'-' Phase I: Air Sampling Locat Simultaneous coverage of all 4 major directions (N, S, E, W) Capture point of predicted maximum concentration from modeling Include co-located samplers at predic maximum Total of six locations ASH028071 EID781351 EID781351 ASH028072 EID781352 EID781352 Air Sampling Strategy Measure ambient air levels 24-hour sampling duration Seven (7) sampling events scheduled ov weeks Vary day of week to capture variations i operations (none expected) and variation meteorology Record site-specific meteorological and operational data Momtoring Strategy: Samples taken every 6 days MONTH 1 (j^2 345 6(j) 8 9 10 11 12^?)l4 15 16 17 18(^)20 21 22 23 24(25)2627 28 29 3d MONTH 2 1234 5^)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 tota * Sample location 3 is co-located with location 2 and se as a duplicate sample ^ 'a 5 S o S -J M .4 ? 3" " 03 Ul (-1 01 lul Ul en Equipment "Sorbenr sampling method to captur PFOA on ion-exchange media OSHA Versatile Sampling tube (OVS Captures particles and vapors Remote power source will be provide Weatherproof stations for sampling equipment OVS Tube Air flow (1 L/min) WaMfcsg HiEg, fSlterSori>sntZ.aysr Po/yweffeana fee S'ortenli.ayarPolywrethaw f^am miCep GIsasTttiis EiwfQap 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 iig/m3 Modeling Program Using U.S. EPA ISCST3 Model Model will simulate actual field condition - Site-specific surface meteorological data (win direction, temp, stability) - Off-site upper air meteorological data - Emissions data - 24-hour averaging time - Predictions at actual height and location of ai intake Comparison of Results Comparing 35 pairs of measured and mod - (5) primary sampling points x (7) sampling e Will use statistical tools to evaluate correlation/differences between measured modeled data Phase II: Verification of Modeling in Community Sampling and analytical protocol same a Locations will be selected to: - Correspond with a range of predicted conce - Ensure security of sample Sampling frequency - Expect 8 events at 5 locations during a six Path Forward Conclude Phase I monitoring, modeling and evaluation - 1Q04 Begin Phase II effort - 2Q04 Summary of Path Forward Item Water - Execute MOU covering GIST recommendations - Gain agreement on OEPA proposal and DuPont suggestions - Propose the additional testing at the ECA proce December 9 AIT* Conclude Phase I monitoring, modeling, and ev - - 1Q04 - Begin Phase H effort - 2Q04