|
The document discusses a survey questionnaire related to DuPont's Teflon fiber production at the Spruance site, addressing conflicting data concerning C8 (PFOA) that was to be submitted to the EPA.
|
2002 |
AR226-2267
|
zzJjNvL3z97EgOQaaXzweLZaa |
1 |
|
The document discusses the 1991 wastewater assessments for C8 (PFOA) related to DuPont's Spruance facility, noting ongoing legal considerations that affect documentation and communication with the EPA.
|
2002 |
AR226-2268
|
J3vLBy87Mqyyd7a0jr4Jn9K1K |
1 |
|
The document discusses the deposition results and final modeling report for PFOA emissions from DuPont in 2003, specifically for the Little Hocking and Lake Washington watersheds.
|
2002 |
AR226-2271
|
rprrXLYrjX8ngMq5NvgyBDDRJ |
1 |
|
The document provides maximum concentration values for C8 (PFOA) emissions from the Washington Works facility, detailing both particulate and vapor phase concentrations within the Little Hocking watershed and the overall area modeled, with total maximum concentrations reaching 1.105 µg/m³ in the watershed and 794 µg/m³ on the plant fenceline.
|
2002 |
AR226-2272
|
Lp63jEBOo9095QqzK9mgZeodX |
1 |
|
The document details a GIST meeting held on March 5, 2002, involving various environmental protection agencies, including the West Virginia and Ohio EPA, to discuss the involvement and information sharing regarding perfluorinated compounds, specifically in relation to public concerns raised by the Little Hocking Ohio Water Association.
|
2002 |
AR226-2270
|
qa7n30KVd3o7X0MbX78o5pDLj |
6 |
|
The meeting notes from May 15, 2002, detail discussions among various stakeholders, including DuPont representatives, regarding the completion of water sampling for C-8 (PFOA) in targeted wells near the Washington Works facility, with findings indicating high concentrations in certain wells and a decision to cease further sampling efforts at the current radius.
|
2002 |
AR226-2273
|
jvmx9QvJ208yRLrVNo4gmgLQ |
3 |
|
The document is a correspondence regarding the final modeling report for PFOA emissions from DuPont, discussing modifications based on previous conversations.
|
2002 |
AR226-2275
|
0gELzM2Lnzy7L4ozEagQeMQ9k |
1 |
|
The document is an email correspondence regarding a presentation related to PFOA by Debbie J. Mulrooney for a West Virginia Department of Environmental Protection meeting, with a request for comments before finalizing the charts.
|
2002 |
AR226-2278
|
wrYy825058mX2j4BvJM7rm84V |
1 |
|
The document discusses the anticipated release of an annual exposure level for C8 (PFOA) by TERA, detailing production estimates and modeling studies for 2003, and requests confirmation of production rates and scrubber efficiencies from DuPont colleagues.
|
2002 |
AR226-2277
|
aJEkJMn5GN211wLQ09VLvNVje |
4 |
|
The document summarizes a meeting on April 24, 2002, involving DuPont and West Virginia Department of Environmental Protection representatives discussing an air modeling report related to C8 (PFOA) emissions, where questions were raised about data accuracy and methodology, particularly regarding particle size distribution and emission levels.
|
2002 |
AR226-2280
|
OJ1B9LZEzEwow50MQJXNek8pK |
3 |
|
The document is an email from Debbie J. Mulrooney of DuPont discussing the receptor grid used for modeling deposition in the Little Hocking watershed, which is related to PFOA, and providing details for the grid setup to a colleague at the West Virginia Department of Environmental Protection.
|
2002 |
AR226-2282
|
nRnjy33LadGVvmLmg32vpg9a |
1 |
|
The document discusses modeling soil concentrations of a persistent chemical, likely PFOA or PFOS, using a mass balance approach and suggests using the PRZM model for more accurate estimations of soil concentration based on various factors such as volatilization, degradation, and plant uptake.
|
2002 |
AR226-2283
|
n9yq8LYvKM4vZGGK1jejjx5XX |
1 |
|
The document discusses the establishment of screening levels for PFOA at DuPont's Spruance facility, indicating specific concentration limits for drinking water, soil, and air, and outlines the need for potential operational changes to meet these standards.
|
2002 |
AR226-2286
|
4aeajo50BVZ8Lda8K0OjrJgje |
1 |
|
The document discusses the need for DuPont to re-evaluate their sampling plans for C-8 (PFOA) in light of a new drinking water standard, suggesting a meeting to address the issue.
|
2002 |
AR226-2285
|
6Rvz0kda1agQmnvpQrnaMVZ3 |
3 |
|
The document is an email from Chris E. Shoop to Mohammad Rezaei and others at DuPont regarding the correction of stack identifications for modeling C-8 emissions, specifically noting that the identities for FE P Lines 1 and 2 have been incorrectly assigned.
|
2002 |
AR226-2288
|
v1XGwyY8wqOowXZ5pa1zLno9Y |
1 |
|
The document discusses the release of a report by the West Virginia Department of Environmental Protection on safe levels of C8 (PFOA), a chemical used by DuPont, and mentions a related press release.
|
2002 |
AR226-2289
|
jjRBmVaY7qOndp036QnN168p |
2 |
|
The document is an email from Chris E. Shoop to Debbie J. Mulrooney and others at DuPont discussing emission estimates for PFOA and surfactants for the years 2001, 2002, and 2003, along with a request for confirmation on the efficiency estimates used in the calculations.
|
2002 |
AR226-2290
|
O3D6Dx7GVn6zdG1nqYa1rORKQ |
1 |
|
The correspondence discusses the ongoing efforts by DuPont to reduce C-8 (PFOA) emissions in the air to a target concentration of 0.3 µg/m³, with a request for more details on measuring such low levels and mentions the pH levels of recovered C-8.
|
2002 |
AR226-2291
|
ga1E4d3v6ObnzzkKyVJaw4pZV |
1 |
|
This document discusses the development of emission data for modeling studies related to PFOA emissions from DuPont's production processes in 2001 and 2002, including details on the efficiency of scrubbers used to control these emissions.
|
2002 |
AR226-2292
|
4J6j8X425QpJMZL88Gn2ZdzaN |
6 |
|
The document discusses a permit determination regarding the proposed installation of facilities at DuPont to evaluate reducing emissions of perfluorinated compounds, specifically indicating that modeling results show no increase in emissions and a potential reduction, with a minor change in concentration from 0.637 to 0.638 µg/m³.
|
2002 |
AR226-2293
|
DdMmN0YYY5yYJ4y7mD3bRJYGQ |
1 |
|
DuPont conducted an air dispersion modeling analysis of APFO emissions from its Washington Works facility in Parkersburg, West Virginia, to predict long-term ambient air concentrations based on actual emissions from the year 2002.
|
2002 |
AR226-2343
|
15yN8nZv1j448Gj0z00Ky5eLj |
8 |
|
The document is an air dispersion modeling analysis of APFO emissions conducted by DuPont for the West Virginia Department of Environmental Protection, covering the period from September 2002 to August 2003.
|
2002 |
AR226-2344
|
RJdgGm8B0d3oj1xNVKYzn0498 |
8 |
|
The document is a revised air dispersion modeling analysis of APFO emissions conducted by DuPont at its Washington Works facility in Parkersburg, West Virginia, covering the period from September 2002 to August 2003, which includes an emissions inventory and modeling procedures to predict ambient air concentrations of APFO.
|
2002 |
AR226-2361
|
3Q3OQ1kvrXqg23yvEL7oe06kO |
9 |
|
The document is an email correspondence discussing environmental coordination related to the C8 issue, specifically seeking feedback on organizational strengths and service timeliness from David M Rurak at DuPont regarding perfluorinated compounds.
|
2002 |
AR226-2486
|
J8778j4D9dZBEjQdGEbD6Xne |
1 |
|
This is an email from Stephen R. Peck to Yasu Shibuta regarding the procedure for the analytical determination of APFO, with additional recipients included in the correspondence.
|
2002 |
AR226-2509
|
ypdd4LgB3koDqm5yE1Zj8Q2Lr |
1 |
|
The document discusses the introduction of a new method for measuring C-8 (PFOA) levels in wastewater at the Shimizu lab, specifically the installation of an ECD Gas Chromatography apparatus, and seeks advice from Stephen Peck regarding this analysis.
|
2002 |
AR226-2511
|
BR6MEM0nVwryaYB81Zn0bDdX8 |
1 |
|
The document discusses efforts by DuPont employees to standardize methods for measuring C-8 (PFOA) levels in wastewater across different sites, specifically mentioning the transition to using ECD gas chromatography for analysis.
|
2002 |
AR226-2514
|
pexG0KB2wMNQkEbxnDN2QErd |
2 |
|
The document discusses the clarification of analytical methods for sampling perfluorooctanoic acid (PFOA) in different media, specifically noting that the same methods used for aqueous samples do not apply to air sampling, and mentions the intention to forward the Quality Assurance Project Plan (QAPP) for review.
|
2002 |
AR226-2515
|
JrjLewRBEEV7NMrkY5XxB75LX |
1 |
|
The document is an email correspondence between Hidetaka Hiromatsu and Andrew S. Hartten discussing the analysis of APFO (Ammonium Perfluorooctanoate) and the possibility of using Mitsui Chemicals for testing due to busy schedules at DuPont's labs.
|
2002 |
AR226-2512
|
XRLdEJYrJ66jgqq6z4QE4MVyB |
4 |
|
The document discusses the need for DuPont's global analytical teams to converge on standardized measurement methods for C-8 compounds, specifically in the context of wastewater analysis, highlighting the importance of sharing existing standardized methods among teams.
|
2002 |
AR226-2516
|
jBNjQVZvpLLenVY3y1vd0m5Z9 |
1 |
|
This document discusses DuPont's use of Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS) for the analysis of PFOA (C-8) in aqueous samples, highlighting the method's accuracy and the company's transition from less accurate GC/ECD methods.
|
2002 |
AR226-2513
|
MJmwnx3ZN5pjwvKRJq8r4azYy |
4 |
|
The document reports the C-8 (PFOA) concentration results from float tank water samples submitted by DuPont, indicating levels of 24.2 ppm and 24.6 ppm for samples 2A and 2B, respectively, and 5.5 ppm and 5.6 ppm for samples 3A and 3B, with a note on the disposal of samples
|
2002 |
AR226-2517
|
V3o5By43k6QLoGnpXwoR53L8 |
1 |
|
The document discusses initial findings from the analysis of acidic waste samples for A P F O (Ammonium Perfluorooctanoate) by DuPont, indicating that while no A P F O was found in the neutralized sample, a usable method for detection appears imminent following successful HPLC analysis.
|
2002 |
AR226-2519
|
wqvZYZ4Qzr5O3MMz3E5dj9XB4 |
1 |
|
The document presents the results of Ohio River water sampling for perfluorooctanoic acid (PFOA) near the DuPont Washington Works facility and the Letart Landfill, as part of a multi-media Consent Order with the West Virginia Department of Environmental Protection.
|
2002 |
AR226-2518
|
78oXgEoxNZaN5KjX7xyy0Qbo |
23 |
|
The document is a compilation of historical data on C-8 (PFOA) from DuPont's Washington Works main plant and associated landfills, detailing environmental settings, water quality, and site conceptual models as part of a corporate remediation effort.
|
2002 |
AR226-2507
|
y4ObO0Jy2byqo2xMVONkVvRr |
57 |
|
The document outlines the agenda and objectives of an EPA/COE update meeting regarding the RCRA program status and multi-media consent order activities at the Washington Works facility, focusing on groundwater modeling and the development of screening levels for C-8 compounds, including PFOA.
|
2002 |
AR226-2552
|
RjyMzLLD3oD0erv57ZEvzoe2v |
11 |
|
The document is a correspondence from DuPont Engineering to the West Virginia Division of Water Resources, providing the complete data package from the sampling of four wells operated by the Little Hocking Water Association, which was part of the GIST well survey conducted in December 2001.
|
2002 |
AR226-2575
|
aELQq7RqJb8M7RM9QKyOw9dN |
1 |
|
The document details a telephone conference on January 30, 2002, discussing the completion of a door-to-door survey and the status of sampling efforts for perfluorinated compounds, with 90% of sampling completed and additional public water supplies requesting testing.
|
2002 |
AR226-2576
|
bB8ZV8exoaDZeY0D0n7X5GqN1 |
3 |
|
The document is an email from Andrew discussing the need for information to verify the assumption that the alluvial aquifer underlying DuPont Washington Works in West Virginia and Little Hocking Water Association in Ohio extends under the Ohio River, which is critical for constructing a new groundwater model.
|
2002 |
AR226-2577
|
o0wR3zJ6NzjOL5D2BxJ9z0Ow |
1 |
|
The document discusses an inquiry from a West Virginia Department of Transportation employee regarding health and safety concerns for workers near a DuPont site during the construction of a highway bypass, with assurances that there are no health and safety issues related to their off-site work.
|
2002 |
AR226-2579
|
gDj10ZBxEpXJp2mgDe6QGwB4J |
1 |
|
The document is a compilation of historical laboratory data on ammonium perfluorooctanoate (C-8) from DuPont's Washington Works main plant and landfills, detailing environmental assessments and water quality analyses.
|
2002 |
AR226-2573
|
60QGZ2q8d52k1rMB7go425Od |
57 |
|
This memorandum details an experiment conducted to determine the airborne particle size distribution of Ammonium Perfluorooctanoate (APFO) generated by 3M, revealing a mean chamber concentration of 397.7 mg/m3 and a geometric standard deviation of 2.17, indicating a relatively homogeneous atmosphere.
|
2002 |
AR226-2805
|
MM7nJazv6BB17e9gJ5ZXzYrKx |
2 |
|
The document outlines a Quality Assurance Project Plan for a groundwater investigation at the Washington Works Plant, focusing on the assessment of perfluorinated compounds, including PFOA and PFOS, as part of a corporate remediation effort by DuPont and URS Diamond.
|
2002 |
AR226-2574
|
5k5drpNqGMBgErqNmjk8e1NL8 |
49 |
|
The document details a GIST meeting held on March 5, 2002, involving various environmental protection agencies and DuPont, discussing the involvement of the Ohio EPA in relation to PFOA contamination and public communication efforts in the Little Hocking area.
|
2002 |
AR226-2581
|
zQQmqjkag7bKBdLEvZykREdz3 |
6 |
|
The Ohio EPA recommends additional water sampling in the Ohio River to assess the extent of C-8 (PFOA) contamination from the Washington Works Facility and surrounding areas, including upstream and downstream locations for better comparison and understanding of its distribution.
|
2002 |
AR226-2582
|
oN1Og89bvvoYKV9MjEz27M83 |
2 |
|
DuPont is responding to comments from the West Virginia Division of Water Resources regarding the February 2002 Surface Water and Groundwater Monitoring Report for the Washington Works Facility and associated landfills, specifically addressing the request for additional groundwater monitoring wells and suggestions for data presentation.
|
2002 |
AR226-2584
|
0OXqeo3OdoqjNXOEzyo0pgoV |
3 |
|
discussed the completion of water sampling related to C-8 (PFOA) around the DuPont facility, noting that most sampling was finished with some high concentrations found in Ohio wells, and the GIST agreed to cease further sampling efforts at the current radius.
|
2002 |
AR226-2585
|
rBypQnNLVxgGxXOzwgBDNJZGe |
3 |
|
The West Virginia Department of Environmental Protection reviewed DuPont's reports on groundwater assessment and monitoring well installation plans related to the C-8 plume at the Washington Works Facility and local landfills, emphasizing the need for enhanced groundwater monitoring to address potential contamination.
|
2002 |
AR226-2587
|
YY6xNpBBbXZN8BQ10KxGaxLk |
5 |
|
This is a DuPont document summarizing a meeting with the ACOE and EPA on July 18, 2002, discussing geological and hydrological data related to the Ohio River and its alluvial aquifer.
|
2002 |
AR226-2589
|
VjX7aDX8vqEynxgoj5MxwXr6g |
27 |
|
DuPont is responding to comments from the Ohio EPA regarding the extension of a One-Mile Radius for surveying and sampling drinking water sources for PFOA in Ohio, agreeing to suggested changes and outlining the sampling protocols and areas to be surveyed.
|
2002 |
AR226-2590
|
O1x4Dp6nRm1x4OBvgkye9mwp |
2 |
|
The document is a letter from the West Virginia Department of Environmental Protection to DuPont, detailing increasing concentrations of PFOA (C8) in groundwater and surface water at the Washington Works Plant and Letart Landfill, as reported in a May 2002 monitoring report.
|
2002 |
AR226-2591
|
X8n3X7gODqV1xBBXVYKM4rXq4 |
4 |
|
The GIST meeting notes from August 12, 2002, detail discussions among various stakeholders, including representatives from DuPont and the EPA, regarding water sampling results for PFOA (C-8) in West Virginia and Ohio, noting elevated concentrations in groundwater at higher elevations and the collaboration on data sharing among agencies.
|
2002 |
AR226-2592
|
K637RJd0QMQN6k1wGnwJDeJRX |
2 |
|
The document discusses ongoing environmental remediation efforts related to PFOA (C-8) at DuPont's Washington Works facility, including groundwater sampling, landfill monitoring, and the detection of PFOA in downstream surface water samples.
|
2002 |
AR226-2593
|
GmQxGNevamN9RM7gLJBG9BoEV |
1 |
|
This document discusses concerns raised by George Dasher regarding increasing concentrations of C-8 (PFOA) in groundwater and surface water at a DuPont plant and the potential need for remediation systems, with preliminary considerations for a response being outlined by Katherine L. Davis.
|
2002 |
AR226-2594
|
g2pN59K1L659a4erJRKKKE6za |
1 |
|
The document is an email from Andrew S. Harden discussing a letter received from George Dasher of the West Virginia Department of Environmental Protection (WVDEP) regarding PFOA, indicating that a response is being prepared and a meeting is scheduled to discuss it.
|
2002 |
AR226-2595
|
aD4nn0B0vkLd5jnBEoge2nBrb |
1 |
|
The document reviews off-site water sampling results related to PFOA from DuPont's Washington Works, indicating that over 1,200 homes were surveyed with drinking water samples showing concentrations significantly below the 150 µg/L screening level, and it discusses groundwater modeling and investigations into elevated C-8 concentrations in the Little Hocking Water Association well field.
|
2002 |
AR226-2596
|
YrpGpKVBGweaRMdxLXvpk0Bwk |
34 |
|
The GIST meeting notes from August 12, 2002, detail discussions among representatives from the Division of Water Resources, Ohio EPA, and DuPont regarding water sampling results for perfluorinated compounds (C-8) in West Virginia, indicating consistent historical trends and no unexpected findings from new monitoring wells or groundwater modeling.
|
2002 |
AR226-2597
|
v6ybRxoYR5n8DV9wGkpbYODKq |
2 |
|
The document is a letter from DuPont's Safety Health & Environmental Manager, David M. Rurak, discussing the company's voluntary commitment to conduct a well survey and sampling for C8 contamination (PFOA) in groundwater within a one-mile radius of a well field, following a directive from the West Virginia Department of Environmental Protection.
|
2002 |
AR226-2603
|
rpxyknBMB0LrqQXvR7ro1OQGG |
1 |
|
The document is a letter from the Ohio Environmental Protection Agency to David Rurak of DuPont, discussing a meeting about perfluorooctanoate (PFOA) contamination at the Little Hocking Water Association and confirming DuPont's agreement to conduct a survey and sampling of private wells in Ohio.
|
2002 |
AR226-2604
|
MoMNQ1DqkrVxexeGqzRKdx3ba |
2 |
|
This letter from Kevin J. Hopper, environmental counsel for The Little Hocking Water Association, informs the Ohio EPA about potential contamination of their wells by ammonium perfluorooctanoate (C-8) from DuPont, referencing recent sampling results that indicate higher concentrations in production and test wells compared to the distribution system.
|
2002 |
AR226-2605
|
kamaEyRpnpk6ZO2z15x5djzBn |
3 |
|
The Ohio Environmental Protection Agency reviewed the April 2002 Proposed Sampling Investigation Plan for the Little Hocking Water Association Well Field, requesting DuPont to collect and analyze soil samples for C-8 (PFOA) to evaluate its presence in the vicinity of test well TW-4, where groundwater concentrations were measured at approximately 37 µg/l.
|
2002 |
AR226-2607
|
GK4DRE573wMNg6RMk8n8VKrgx |
6 |
|
The document is a response from the Ohio Environmental Protection Agency to DuPont regarding their revised Sampling Investigation Plan for assessing the extent of C-8 (PFOA) contamination in groundwater and soil at the Little Hocking Water Association Well Field, indicating agreement with the proposed sampling locations but recommending additional samples for a more thorough evaluation.
|
2002 |
AR226-2608
|
g7VnXymB1n2egxo05ydOZJ89 |
3 |
|
DuPont's correspondence outlines their proposed soil sampling plan for the Little Hocking Water Association well in Washington County, Ohio, in response to comments from the Ohio EPA regarding the need for additional samples to assess the vertical distribution of C-8 (PFOA) and its potential leaching into groundwater.
|
2002 |
AR226-2609
|
Ln6m0ZD8jKqVyJM5aDrZxXm5 |
4 |
|
The document presents industrial hygiene test results for perfluorinated compounds (C-8/FC-143) from various locations in a facility during 1987, indicating concentrations ranging from 300 z to 510 z across multiple sampling dates.
|
2001 |
AR226-2114
|
0qeYrLw8kRQBNkJr5M1L2KBpJ |
10 |
|
The document provides industrial hygiene sampling data for perfluorinated compounds (C-S/FC-143 and C-8/FC-143) related to Teflon production, detailing sample dates, concentrations, and locations within the facility, indicating high levels of exposure.
|
2001 |
AR226-2113
|
gDnvqD8YRKrm11EL9xQkMo3Na |
11 |
|
The document provides a summary of industrial hygiene sampling results for perfluorinated compounds (C-8/FC-143) from various locations in a Teflon production facility during 1984, detailing concentration levels and sample dates.
|
2001 |
AR226-2112
|
06zBbX8GbDvQ5aQ2RJjpVX52d |
23 |
|
The document presents industrial hygiene test results for perfluorinated compounds (C-8/FC-143) from various sampling locations at Pere Chemical during 1988, indicating concentrations ranging from <0.03 MPB to 5.4% across multiple samples.
|
2001 |
AR226-2115
|
O3x1k5MzJQQbEbEpV504Jmw8j |
12 |
|
The document presents industrial hygiene sampling results for perfluorinated compounds, specifically C-8 and C-6, from various employees at Petrs Chemical, indicating concentration levels and compliance with action levels over multiple sampling dates in 2000.
|
2001 |
AR226-2116
|
Dv0Rrp6vMozE6B20r7wLV7VdB |
8 |
|
The document presents industrial hygiene test results from Pere Chemical for various samples taken between January and December 1983, indicating concentrations of C-8/FC-143, a perfluorinated compound, with varying levels detected across different sampling dates.
|
2001 |
AR226-2111
|
5bxdQMnB7DD6BY6DowNVv0mZ0 |
43 |
|
The document presents test results for C-8 (likely referring to perfluorooctanoic acid, PFOA) concentrations in the workplace, showing various measurements in parts per million (PPM) from samples taken between 1970 and 1981, with all results indicating concentrations at or near zero.
|
2001 |
AR226-2118
|
kLmYDKzyp45prDGkdYbNmV7J |
9 |
|
The document presents test results from December 11-13, 1979, indicating the concentration of C-8 (likely referring to PFOA) in two samples from TEFLON production, with concentrations below the action level of 0.0001 PPM.
|
2001 |
AR226-2120
|
VJv5Qn6DbkN435VBrLJMKOGop |
2 |
|
The document presents test results for C-8/FC-143, a perfluorinated compound, indicating various concentration levels ranging from 0.03% to over 6.0% across multiple samples collected between 1981 and 1992 in an industrial setting.
|
2001 |
AR226-2122
|
RJq6b7onEp79ZKeKvNDL3eq8 |
4 |
|
The document presents industrial hygiene test results for C-8 (PFOA) concentrations in various locations and dates from 1973 to 1981, showing concentrations ranging from <0.0001 PPM to 0.0015 PPM, all below the action level of 0.0%.
|
2001 |
AR226-2119
|
jym4kJ1vEvo74Nga46JVRYzrN |
51 |
|
The document presents test results for C-8 (likely referring to perfluorooctanoic acid, PFOA) concentrations in various samples collected from industrial settings between 1973 and 1981, showing consistently low levels of contamination at or below 0.1 PPM.
|
2001 |
AR226-2124
|
VJbJq1v2r06w0Gr5o8oDkbmV8 |
16 |
|
The document contains industrial hygiene test results for C-8 (a perfluorinated compound) from various dates between 1973 and 1981, indicating concentrations mostly below detection limits, with some samples showing values as low as 0.0001 PPM.
|
2001 |
AR226-2125
|
re7rQO0V77V19yB46Yo83z8y0 |
16 |
|
The document presents test results for perfluorinated compounds, specifically C-8/FC-143, from various samples collected between 1989 and 2001, indicating varying concentrations and percentages of contamination in an industrial setting.
|
2001 |
AR226-2123
|
LJkBQyedDoXaXb4RnoqygL12g |
49 |
|
The document presents test results for Chemical C-8 (likely referring to PFOA or PFOS) from various samples taken between January 3, 1979, and April 30, 1981, indicating concentrations mostly below detection limits, with action levels not exceeded.
|
2001 |
AR226-2128
|
a1DoQQ8MGVJXDkBXVypwEwmba |
2 |
|
The document presents test results for C-8 (perfluorinated compounds) from various samples taken between 1978 and 1998 at FEP ovens, indicating concentrations mostly below 0.0001 PPM with a consistent action level of 0.0%.
|
2001 |
AR226-2127
|
jgvKMVB2KR5qYxyYJ3w0aJN3R |
42 |
|
The document presents industrial hygiene test results for C-8/FC-143 (a perfluorinated compound) from various employees over a range of dates, indicating concentrations that vary from less than 0.01 MPB to as high as 1.59 MPB, with some samples exceeding action levels.
|
2001 |
AR226-2117
|
NexZNeGLp1g93bOVv92kMb6qy |
99 |
|
The document presents test results for perfluorooctanoic acid (C-8 or PFOA) concentrations in various samples from industrial hygiene assessments conducted between January 1979 and April 1981, indicating that all measured concentrations were below action levels, with some results showing less than 0.0001 PPM.
|
2001 |
AR226-2129
|
mJxVvG85Z8jpk8n2x6Qv4pQO |
2 |
|
The document contains test results for C-8/FC-143 (a perfluorinated compound) from various samples collected between 1981 and 2001, detailing concentration levels and percentages of the compound in different industrial settings.
|
2001 |
AR226-2132
|
yk0nBqdMXkZD35vov1QVbJmDn |
12 |
|
The document summarizes vapor phase modeling results for PFOA emissions from a Fayetteville facility, indicating that average concentrations for particle and particle-bound phases are lower than those for the vapor phase, and discusses the need for adjustments in the modeling parameters.
|
2001 |
AR226-2153
|
wD9ED3oJb6GDQVLv10kG5jgQo |
2 |
|
The document outlines a meeting recap regarding air and drinking water risk assessments for PFOA emissions from DuPont, detailing plans for additional air dispersion modeling and calculations to ensure compliance with environmental guidelines.
|
2001 |
AR226-2154
|
gbZyOe6okadqGK5yNRD8r8vLa |
1 |
|
The document outlines a meeting recap regarding air and drinking water risk assessments for PFOA emissions from DuPont, detailing modeling cases and calculations to ensure compliance with environmental guidelines.
|
2001 |
AR226-2155
|
n9jx2o8mVNpXD6Y7gRRYbbQvX |
1 |
|
The document is an email from Catherine A. Barton to Robert F. Pinchot discussing the development of a scope of work for air dispersion modeling related to PFOA emissions at the Washington Works site, with a focus on deposition impacts on surrounding land and the river.
|
2001 |
AR226-2156
|
x539nyrDxmebBMyveYgn4OeqQ |
1 |
|
This is an email from Robert F. Pinchot to Catherine A. Barton and Debbie J. Mulrooney at DuPont, regarding a proposal for a WW air dispersion model, referenced as AR226-2157.
|
2001 |
AR226-2157
|
NGK7aapL0Z5b3563kk85g8a6b |
1 |
|
The document discusses air dispersion modeling strategies related to emissions from DuPont's vent points, specifically addressing the recovery rates of scrubbers and filters for perfluorooctanoic acid (C-8) emissions, while noting permit limits for certain points.
|
2001 |
AR226-2160
|
ZJwL3RJZLYpw9MmG1XOMvV1DJ |
1 |
|
The document discusses a proposal for surfactant modeling related to PFOA by DuPont, including coordination among team members and a request for funding prior to a regulatory information request.
|
2001 |
AR226-2158
|
Y9v3L7D6nnGQ287r9VeE47ZBO |
1 |
|
This document outlines a strategy for modeling airborne emissions of APFO from DuPont's Washington Works facility, detailing communication with WVDEP regarding emission rates and the development of a modeling program to assess exposure potential.
|
2001 |
AR226-2159
|
mpKvLLNV87Og1E6r4z6ZOy5Zb |
2 |
|
The document is an email from Chris E. Shoop to various DuPont colleagues discussing updated air dispersion modeling data related to emissions from vents associated with a pending Research Semiworks application.
|
2001 |
AR226-2163
|
KRdk8LM40mXoODejbg7obyo4X |
1 |
|
The document discusses a communication among DuPont employees regarding the modeling of emissions related to a substance classified as a particulate and semi-volatile under EPA guidelines, with a focus on the need for independent modeling to verify results.
|
2001 |
AR226-2162
|
pBkdJ6a6NXLa05kgqLMR3X64k |
4 |
|
The document discusses DuPont's air modeling efforts for APFO emissions from their Fluoropolymers plant, indicating that they will use an EPA-approved model and expect initial results by the end of July 2001, while also suggesting that independent modeling by the West Virginia Department of Environmental Protection (WVDEP) should occur in parallel.
|
2001 |
AR226-2165
|
DvGOXr11BnppgQNzpZ19Vra1o |
2 |
|
The document is an email from Debbie J. Mulrooney of DuPont Engineering Technology, providing model input files related to source parameters and site boundaries for a project at DuPont's Washington Works, while indicating ongoing efforts to gather additional building information.
|
2001 |
AR226-2166
|
EJoYZVMz3X40dpv5BQwmxBjg |
1 |
|
The document discusses the preparation and submission of model input files related to environmental permit applications for DuPont's Washington Works, focusing on ensuring consistency with stack flows and velocities, amidst heightened scrutiny from the West Virginia Department of Environmental Protection (DEP).
|
2001 |
AR226-2169
|
2JQNZYJ1qONg2aJ5YegQkdqgL |
2 |
|
The document presents test results for perfluorinated compounds, specifically C-8/FC-143, from various sampling locations at a Teflon production facility, indicating varying concentrations and percentages over a period from 1981 to 2001.
|
2001 |
AR226-2131
|
jB0EnVKX50nx5j51LoL7B2wMy |
157 |
|
The document is a preliminary communication from Debbie Mulrooney of DuPont regarding the verification of building heights and structures at a site related to environmental engineering, with plans for a site visit to ensure accurate modeling.
|
2001 |
AR226-2171
|
99bY8p15w9bMJzvmkJVzK9M1D |
1 |
|
The document is an email from Debbie J. Mulrooney to Chris Carrington discussing a draft modeling protocol related to PFOA, with questions about averaging times, on-site exposure comparisons, and deposition modeling.
|
2001 |
AR226-2173
|
18MdwepZNLqNJoOwvZdg0n2X |
1 |
|
The document discusses revised modeling parameters related to C-8 (PFOA) emissions from DuPont's granular dryers, including estimates of allowable hourly rates and specific vent calculations.
|
2001 |
AR226-2175
|
rx4ybq7rago7XrMpLBR7RpDre |
1 |
|
The document outlines the dispersion modeling protocol for assessing ambient air concentrations of Ammonium Perfluorooctanoate (APFO) emissions from the DuPont Washington Works facility, detailing the methodology, emission source information, model selection, receptor grids, and meteorological data to be used.
|
2001 |
AR226-2174
|
5kVEZZnXz14DwgLQ8mkMewqBD |
3 |
|
This is an email from Chris E. Shoop to Debbie J. Muirooney at DuPont, discussing building heights and coordinates, along with attached files containing relevant data and revised UTM coordinates for vents.
|
2001 |
AR226-2178
|
85VOMZa3RqaGB38xXG65axrMy |
1 |