Document OE5Ne8aXYDLMz2XryeEkMXvJw

3M General Offices 3M Center St. Paul. MN 55144-1000 651 733 1110 p .1 AAZZt- 3 7 % 3M October 25, 2007 VIA UPS J Document Control Office (DCO) Office of Pollution Prevention and Toxics (OPPT) US Environmental Protection Agency EPA East, Room 6428 1201 Constitution Avenue, NW Washington DC 20460 ' Attention: Docket No. AR-226 and the PFOA Electronic Docket OPPT-2003-0012 Subject: Fifth and Final Submission of Monitoring Data Pursuant to the 3M LOI dated March 13, 2003 and PFOA Users LOI dated March 14, 2003 Dear Sir or Madam: This report is submitted pursuant to the 3M Letter of Intent (LOI) dated March 13, 2003 and the PFOA Users LOI dated March 14, 2003. The report is the fifth and final submission under the Letters of Intent of the results of groundwater and wastewater monitoring at the 3M manufacturing sites at Cottage Grove. MN and Decatur, AL. Perfluorooctanoic acid (PFOA) was previously produced at these sites. In addition to the data tabulated in this submittal, additional surface water, sediment and fish samples were collected from the Tennessee River in December 2006. Final analytical reports for these samples are not yet available. W'hen they are completed, the results will be submitted as an addendum to this annual report. As noted in the 3M LOI and in the 3M submission pursuant to this LOI, monitoring of wastewater treatment plant effluent and groundwater for the presence of PFOA has been underway at the Decatur and Cottage Grove sites for a number of years. This monitoring was initiated as a result of 3M voluntary' commitments and/or plans established through permits with local regulators. Under the 3M LOI, 3M agreed to continue this monitoring in order to assess the trends that are likely to occur as a result of the 3M production phase-out of PFOA, completed at the end of 2002 and the discontinuation of the use of PFOA at the Dyneon fluoropolymer manufacturing facility. Because the Dyneon and former 3M manufacturing operations are located at the same site, it was determined that monitoring would be conducted and reported jointly by 3M and Dyneon. The description of the monitoring program under the LOIs can be found in our May 7, 2003 letter to Ward Penberthy of EPA. and in our first Submission of Monitoring Data dated August 1, 2003. These two documents have been entered into the AR-226 Docket and the PFOA Electronic Docket 2003 - 0012. Please refer to those two Dockets for background information and a detailed description of the test methodology, sampling plans CONTAINS NOCBI / 2AV/7 U U U l UA' Page 2 o f 9 Document Control Office (DCO) Office o f Pollution Prevention and Toxics (OPPT) U.S. Environmental Protection Agency P-2 and proposed test schedule for wastewater and groundwater monitoring at the Cottage Grove and Decatur sites. COTTAGE GROVE. MN SITE MONITORING DATA Monitoring Results Groundwater Monitoring As explained in the previous submittals, 3M selected five groundwater sampling locations for semi-annual PFOA monitoring. The five monitoring points were chosen as representative of the following site conditions. (Please consult the site map attached to the report dated August 1, 2004): Monitoring Point MW-7 MW-4 PZ-14 MW-101 Water supply distribution system Site Condition Upgradient of site industrial activities Central to site industrial activities Westem/downgradient of site industrial activities Eastem/downgradient of site industrial activities Site-wide ground water from the production wells Since submittal of the last annual LOI report, the only PFOA monitoring data that has been generated has been for the Water Supply Distribution System location. Additional 2006 sampling events occurred on July 31 and November 7. The results of these monitoring events and previous sampling results for these points are presented in the attached Table 1. Sampling of the water supply distribution system was substituted for sampling of the individual high-capacity pumping wells because the water that supplies this system is a composite of water drawn from these wells and therefore is representative of groundwater throughout the developed portion of the site. It should be noted that a granular activated carbon (GAC) treatment system was installed at this sample location in late 2004. The results for samples collected on March 12 and June 22, 2005 represent post-treatment water. As expected, PFOA was not detected in these samples at a limit of quantitation of 0.025 ug/L. For subsequent sampling events, inlet water was also collected in order to continue the trend analysis in the water supply distribution system. Results presented for samples collected after June 2005 represent water collected prior to GAC treatment. Effluent Monitoring The site has a multi-phased wastewater treatment plant that is used to treat all process wastewaters generated at Cottage Grove. Two of the systems treat inorganic wastewaters and the third is an organic, biological treatment system. All of the process effluent wastewater is treated with activated carbon. The treated process wastewaters from these operations are combined at a single discharge point and then are further combined with non-contact cooling and storm water before being discharged to the Mississippi River. Page 3 of 9 Document Control Office (DCO) Office o f Pollution Prevention and Toxics (OPPT) U.S. Environmental Protection Agency p.3 Since January 2001, the 3M Cottage Grove plant has conducted PFOA analysis of its effluent. Sampling has been performed monthly beginning in January 2003 in accordance with the requirements of 3M's NPDES permit. This information is reported to the Minnesota Pollution Control Agency in the monthly Discharge Monitoring Reports. Effluent wastewater samples are collected at the plant outfall to the Mississippi River. This is the common discharge point for all of the plant's process wastewaters. All samples are collected as 24-hour composites and duplicate analysis is conducted for each sample. The monitoring results of the Cottage Grove process wastewater effluent discharged under Minnesota NPDES Permit No. MN000149, Outfall SD 001 are shown in the attached Table 2. The data includes results of all monitoring events in 2006 and from previous years. As shown in Table 2, PFOA levels have clearly dropped since the original submittals under this LOI program. As mentioned above and in previous meetings and reports, several years ago, 3M installed an activated carbon treatment system to remove certain constituents from the wastewater treatment plant effluent. This system has been optimized and is in full operation. While the system was installed for reasons unrelated to PFOA, this technology has been shown to be effective in removing this substance as well. Page 4 of 9 Document Control Office (DCO) Office o f Pollution Prevention and Toxics (OPPT) U.S. Environmental Protection Agency P-4 DECATUR, AL SITE MONITORING DATA Monitoring Results Groundwater Monitoring As stated in the previous submissions, 3M selected the following wells for groundwater sampling and PFOA analysis going forward (see site map attached to the August 1, 2004 report): Monitoring Location Site Condition Wells 226R & L Located east of inactive landfill and south of wastewater treatment - monitors background conditions in residuum and shallow limestone groundwater Wells 220R and L Well 320L Wells 327R Located northeast of inactive landfill - monitors predominant flow path of plume in residuum and shallow limestone zones Located north of inactive landfill - monitors secondary flow path of plume Located in the former incinerator area - monitors residuum groundwater near source area Wells 310R & 317L Located in the Chemical Plant - monitors dominant groundwater flow pathways in the Chemical Plant Groundwater samples from the eight monitoring points were collected in November 2006. The PFOA results are presented in the attached Table 3. As indicated by the data presented in Table 3, there is a wide range of PFOA levels measured in the groundwater beneath the site. Effluent Monitoring 3M's Decatur, Alabama manufacturing facilities obtain process water from the City of Decatur Utilities and directly from the Tennessee River. In addition, many of the manufacturing operations utilize non-contact cooling water, which is obtained from the Tennessee River. All process wastewaters from the 3M and Dyneon manufacturing operations are treated in the site's wastewater treatment facility. The system contains both physical-chemical and biological treatment. Process wastewaters are mixed with non contact cooling water prior to discharge to the Tennessee River. The discharge is permitted under Alabama NPDES Permit No. AL0000205. The process wastewater Page 5 o f 9 Document Control Office (DCO) Office o f Pollution Prevention and Toxics (OPPT) U.S. Environmental Protection Agency P-5 discharge and combined process wastewater/non-contact cooling water is designated as Outfall 001A and 001, respectively. As explained in our May 7, 2003 letter, wastewater sampling at the Decatur site for PFOA analysis has been conducted on a quarterly basis. Samples are collected at Outfall 001, which consists of treated process wastewater and cooling water. The outfall discharges to Baker's Creek, which in turn empties into the Tennessee River. All samples are collected as 24-hour composites and duplicated analysis is conducted for each sample. The specific sampling and analytical protocols were described in 3M's May 7, 2003 letter to EPA. The PFOA monitoring results for the Decatur wastewater effluent discharged under Alabama NPDES Permit No. AL000205, Outfall 001 are shown in the attached Table 4. The data summary includes the historical data and the results from 2003 - 2006 monitoring events. As indicated by these data, effluent concentrations have shown a significant decrease since 2002 when PFOA production and use was phased out. Surface Water. Sediment and Fish Sampling As previously noted, surface water, sediment and fish samples were collected from the Tennessee River in December 2006. As soon as final analytical reports are completed for these samples, an addendum to this annual report will be submitted. In summary, this letter reports results of wastewater and groundwater monitoring at both the Decatur and Cottage Grove sites. This submittal fulfills the commitments of 3M and Dyneon under the March 13, 2003 3M LOI and the March 14, 2003 APFO Users LOI, subject to the submittal of the aforementioned addendum when the December 2006 Tennessee River data is available. If there are any questions, please contact the writer at the address provided below. Sincerely, Michael A. Santoro Director, Environmental, Health, Safety and Regulatory Affairs 3M - Bldg. 236-1B-10 St. Paul, MN 55144 651 733-6374 (phone) 651 733-1958 (fax) E-mail: masantorofi'mmm.com cc: Toni Krasnic - Room 4410L Attachments Page 6 o f 9 Document Control Office (DCO) Office o f Pollution Prevention and Toxics (OPPT) U.S. Environmental Protection Aeencv P-6 T ab le 1 3M C o ttag e G rove G ro u n d w a te r M onitoring R esults S a m p le Location M W -7 M W -101 Water Supply Distribution System P Z -1 4 M W -4 D ate S a m p led 0 7 /1 1 /0 1 0 9 /0 7 /0 1 10/31/01 11/12/01 1 2 /0 3 /0 2 0 6 /0 5 /0 3 0 9 /3 0 /0 3 0 5 /1 9 /0 4 0 9 /2 9 /0 4 0 3 /1 6 /0 5 0 6 /2 2 /0 5 1 1 /0 9 /0 5 0 6 /2 9 /0 6 0 7 /1 1 /0 1 0 9 /0 7 /0 1 10/31/01 11/12/01 1 2 /0 3 /0 2 0 6 /0 5 /0 3 0 9 /3 0 /0 3 0 5 /1 9 /0 4 0 9 /2 9 /0 4 0 3 /1 2 /0 5 0 6 /2 2 /0 5 1 1 /0 9 /0 5 0 6 /2 9 /0 6 0 7 /1 1 /0 1 0 9 /0 7 /0 1 10/31/01 11/12/01 1 2 /0 3 /0 2 0 6 /0 5 /0 3 0 9 /3 0 /0 3 0 5 /1 9 /0 4 0 9 /2 9 /0 4 0 3 /1 2 /0 5 0 6 /2 2 /0 5 1 1 /0 9 /0 5 0 6 /2 9 /0 6 0 7 /3 1 /0 6 1 1 /0 7 /0 6 0 7 /1 1 /0 1 0 9 /0 7 /0 1 10/31/01 11/12/01 1 2 /0 3 /0 2 0 6 /0 5 /0 3 0 9 /3 0 /0 3 0 5 /1 9 /0 4 0 9 /2 9 /0 4 0 3 /1 5 /0 5 0 6 /2 2 /0 5 1 1 /0 9 /0 5 0 6 /2 9 /0 6 07/11/01 0 9 /0 7 /0 1 10/31/01 11/12/01 1 2 /0 3 /0 2 0 6 /0 5 /0 3 0 9 /3 0 /0 3 0 5 /1 9 /0 4 0 9 /2 9 /0 4 0 3 /1 6 /0 5 0 6 /2 2 /0 5 1 1 /0 9 /0 5 0 6 /2 9 /0 6 P F O A (ppb) NA NA NA NA NA 0.309 0.329 0 .3 6 7 0 .3 6 0 .2 3 7 0 .2 3 5 0 .2 3 8 0 .2 1 3 NA NA NA NA 170 135 158 236 163 157 125 120 127 1.23 NA 4 0 .6 11.4 NA 28 5.17 23.6 12.9 ND ND 10.5 9.72 7.72 13.1 NA 6 .4 0 5.89 4 .6 6 NA 4 .8 0 4 .1 0 4 .6 8 4 .4 0 2.71 1.60 1.67 1.42 NA NA 5 .6 7 5 .3 0 NA 10.2 8.74 17.0 12.2 10.7 10.4 12.3 6 .8 2 P F O A L a b R eplicate fp p b ) NA NA NA NA NA 0 .3 0 7 0 .3 3 4 NA NA 0 .2 9 4 0 .2 2 5 0 .1 9 6 0 .1 8 9 NA NA NA NA 180 149 155 NA NA 147 129 120 124 1.14 NA 3 8 .5 10.8 NA 28.1 5 .3 5 NA NA ND ND 8 .3 4 9 .6 6 NA NA NA 6 .7 7 4 .9 6 4 .6 3 NA 4 .6 7 3 .9 8 NA NA 2 .0 2 1.73 0 .9 6 1.40 NA NA 5 .9 3 5.11 NA 10.2 9 .1 0 NA NA 9 .4 7 9 .5 6 8 .9 0 681 ! Table Notes: ppb: parts per billion (ug/L) NA: data not available for sampling period ND: not detected at or above 0.025 ug/L NR: not reportable due to quality control issues P F O A Field D u p licate (ppb) NA NA NA NA NA 0.326 0.327 0 .3 6 6 0 .3 7 0 .3 1 4 0 .2 6 7 0.251 0 .2 3 7 NA NA NA NA 172 125 154 230 165 145 183 121 126 NA NA 41.1 17.1 NA 27 7 8 .7 7 2 3 .3 158 ND ND 10.5 9 .2 7 7.40 13.6 NA 6 .0 6 5 .2 5 4 .6 0 NA 4 .9 6 4 .0 9 4 .8 3 4 .4 0 2 .4 0 1.78 1.69 1 37 NA NA 7 .3 9 5 .4 5 NA 10.1 9 .1 2 16.4 13.3 9.31 9 .6 5 NR 6 89 PFO A A vg (ppb) NA NA NA NA NA 0 .3 1 4 0 .3 2 8 0 .3 6 6 5 0 .3 7 0.282 0.242 0 228 0.213 NA NA NA NA 174 136 156 233 164 150 146 120 126 1.18 NA 40.1 13.1 NA 2 7 .9 6 .4 3 2 3 .4 14.4 ND ND 9 .7 8 9.55 7 .5 6 13.40 NA 6.41 5.37 4 .6 3 NA 4.81 4 .0 6 4 .7 6 4 .4 0 2 .3 8 1.70 1.44 1.40 NA NA 6 .3 3 5 .2 9 NA 10.2 8 .9 9 16.7 12.8 9.83 9 .8 7 10.6 6.84 Page 7 of 9 Document Control Office (DCO) Office o f Pollution Prevention and Toxics (OPPT) U.S. Environmental Protection Agency S am p le L o c a tio n SD 001 T a b le 2. 3M C ottage G ro ve E fflu e n t M o n ito rin g R esults D ate S am p led Jan-Mar 2001 Sep-Oct 2001 P FO A (pp b) P F O A Field D u p lic ate (ppb) Averaqe of 8 data points Average of 3 data points 12/12/02 01/15/03 02/12/03 03/12/03 04/23/03 05/15/03 06/11/03 07/16/03 08/07/03 09/10/03 10/08/03 11/05/03 12/10/03 01/14/04 02/04/04 03/03/04 04/07/04 05/05/04 06/02/04 07/14/04 08/04/04 09/01/04 10/13/04 11/11/04 12/01/04 01/12/05 02/03/05 03/10/05 04/07/05 05/05/05 06/09/05 07/06/05 08/18/05 09/15/05 10/06/05 11/02/05 12/07/05 01/04/06 02/01/06 03/01/06 04/05/06 05/03/06 06/08/06 07/05/06 08/02/06 09/06/06 10/05/06 11/01/06 12/06/06 80.1 80.0 74.3 112 95.0 18.9 77.4 79.7 53.3 73.9 60.1 64.7 2003 A verage 1.60 127 73.3 8.90 36.8 2.50 81.1 3.00 8.00 1.00 32 8 28.3 2004 Average 19.2 22.2 262 26.1 4.30 41.9 46.7 32.0 1.20 1.90 66.6 0.90 2005 Average 0.83 1.96 0.94 4.20 0.33 0.26 0.34 0.50 2.31 0.54 1.51 1 38 2006 A verage 77.9 78.8 74.7 109 101 16.4 79.7 85.2 55.5 102 67.8 66.5 1.74 102 75.9 9.50 34.3 2.50 73.4 2.70 7 90 1.00 32 5 29.0 20.0 23 8 264 24.7 4.30 48.0 42.4 28.4 1.20 1.90 52.5 0.90 0.94 2.10 0.96 4.40 0.34 0.25 0,34 0.48 2.63 0.58 1.40 1 47 Table Notes: ppb: parts per billion (ug/L) NA: data not available for sampling period ND: not detected at or above 0.025 ug/L NR: not reportable due to quality control issues P FO A A vg (ppb) 1991 216 180 79.0 79.4 74.5 110.5 98.0 17.7 78.6 82.5 54.4 88.0 64.0 65.6 7 4 .4 1.67 114.5 74.6 9.20 35.6 2.50 77.3 2.90 8 00 1.00 32.7 28.7 3 2 .4 19.6 23.0 263 25.4 4.30 45.0 44.6 30 2 1.20 1.90 59.6 0.90 4 3 .2 0.88 2.03 0.95 4.30 0.33 0.26 0.34 0.49 2.47 0.56 1.46 1.42 1 .2 9 Page 8 of 9 Document Control Office (DCO) Office o f Pollution Prevention and Toxics (OPPT) U.S. Environmental Protection Agency p.8 T ab le 3. 3M D ecatur G ro u n d w a te r M o nitoring R esults S a m p le Location 220L 220R 226L 226R 310R 317L 320L 327R D a te S a m p led 0 7 /1 6 /0 3 1 2 /X X /0 3 0 6 /X X /0 4 1 2 /1 6 /0 4 0 6 /0 9 /0 5 1 1 /1 7 /0 5 0 6 /2 3 /0 6 1 1 /1 0 /0 6 0 7 /1 6 /0 3 1 2 /X X /0 3 0 6 /X X /0 4 1 2 /1 6 /0 4 0 6 /0 9 /0 5 1 1 /1 7 /0 5 0 6 /2 3 /0 6 1 1 /1 0 /0 6 0 7 /1 6 /0 3 1 2 /X X /0 3 0 6 /X X /0 4 1 2 /1 6 /0 4 0 6 /0 9 /0 5 1 1 /1 7 /0 5 0 6 /2 3 /0 6 1 1 /1 0 /0 6 0 7 /1 6 /0 3 1 2 /X X /0 3 0 6 /X X /0 4 1 2 /1 6 /0 4 0 6 /0 9 /0 5 1 1 /1 7 /0 5 0 6 /2 3 /0 6 1 1 /1 0 /0 6 0 3 /2 8 /0 1 0 7 /1 6 /0 3 1 2 /X X /0 3 0 6 /X X /0 4 1 2 /1 6 /0 4 0 6 /0 9 /0 5 1 1 /1 7 /0 5 0 6 /2 3 /0 6 1 1 /1 0 /0 6 0 7 /1 6 /0 3 1 2 /X X /0 3 06/XX /04 1 2 /1 6 /0 4 0 6 /0 9 /0 5 1 1 /1 7 /0 5 0 6 /2 3 /0 6 1 1 /1 0 /0 6 0 7 /1 6 /0 3 1 2 /X X /0 3 G&/a a /G4 1 2 /1 6 /0 4 0 6 /0 9 /0 5 1 1 /1 7 /0 5 0 6 /2 3 /0 6 1 1 /1 0 /0 6 0 7 /1 6 /0 3 1 2 /X X /0 3 06/XX /04 1 2 /1 6 /0 4 0 6 /0 9 /0 5 1 1 /1 7 /0 5 0 6 /2 3 /0 6 1 1 /1 0 /0 6 P F O A (ppb) 8 9 .2 135 110 139 51.2 6 9 .7 90.1 7 1 .8 6 8 .2 102 9 2 .3 6 8 .5 4 0 .6 5 1 .8 6 4 .4 56.6 NQ ND ND ND ND ND ND ND 10.6 11.7 9 .5 4 9 .8 4 4 .9 4 9 .2 0 7 .5 7 6 .8 2 1060 1570 2010 1580 1870 1640 1440 1460 NR 0 .9 4 0 0.521 0 .7 7 6 0 .8 6 0 0 .4 1 0 0 .3 8 3 0 .5 1 4 0 .4 2 6 ND NQ 0 .4 8 3 0 .0 7 6 4 0 .1 3 4 ND 0 .0 4 0 6 0 .0 6 6 2 2280 1780 1360 1850 1080 1260 907 585 P F O A L ab R e p licate (ppb) 88 8 131 NA NA 5 5 .3 6 5 .8 8 9 .0 6 7 .0 6 8 .6 8 9 .0 NA NA 44.1 5 0 .2 6 7 .8 5 6 .4 ND ND NA NA ND ND ND ND 11.0 10.6 NA NA 5 .0 8 9 .0 5 7 .6 3 5 .9 8 1110 1560 2140 NA NA 1430 1280 1740 NR 0 .9 5 0 0 .4 9 0 NA NA 0 .7 6 3 0 .3 8 4 0 .3 6 9 0 .3 9 6 ND NQ NA NA 0 .1 5 8 ND 0.0397 0.0569 2600 1910 NA NA 1030 1090 968 602 P F O A Field D u p lic a te (Dob) 9 0 .2 142 121 129 52.3 6 7 .3 122 7 6 .7 6 5 .8 106 9 7 .9 6 5 .3 4 2 .0 4 7 .7 61 2 6 2 .3 ND ND ND ND ND ND ND 0 .0 2 9 6 10.6 13.2 9.85 11.2 7 .9 2 8 .3 9 8.51 7 .5 8 1190 1590 2670 1940 1830 1260 1280 1270 NR 0 .9 9 0 0 .7 8 5 0 .7 9 2 0 .8 7 4 0 .5 4 5 0 387 0.433 0.453 NQ NQ 0 .5 0 6 0 .0 8 0 2 0 .1 6 7 ND 0 0539 0.0394 2280 1910 1370 1750 803 1150 791 558 Table Notes: ppb: parts per billion (ug/L) NA: data not available for sampling period ND: not detected at or above 0.025 ug/L NR: not reportable due to quality control issues NQ: not quantifiable oo P F O A A vg (ppb) 89.4 136 116 134 52.9 67.6 71.8 67.5 99.0 95.1 6 6 .9 4 2 .2 4 9 .9 64.5 58.4 ND ND ND ND ND ND ND 0 .0 2 9 6 10.7 11.8 9.70 10.5 5 98 8.88 7 .9 0 6.79 1120 1573 2273 1760 1850 1443 1333 1490 NR 0 .9 6 0 0 .5 9 9 0 .7 8 4 0 .8 6 7 0 .5 7 3 0 .3 8 5 0 .4 3 9 0 .4 2 5 ND NQ 0 .4 9 5 0 .0 7 8 3 0 .1 5 3 ND 0 .0 4 4 7 0 .0 5 4 2 2386 1867 1365 1800 971 1167 889 582 Page 9 of 9 Document Control Office (DCO) Office o f Pollution Prevention and Toxics (OPPT) U.S. Environmental Protection Agency P-9 Table 4. 3M Decatur Effluent Monitoring Results Sample Location Outfall 001 Date Sampled 1998 1999 2000 2001 OI/xx/03 05/28/03 07/21/03 11/03/03 01/27/04 06/16/04 12/20/04 02/15/05 05/24/05 08/23/05 12/13/05 02/14/06 06/27/06 08/29/06 12/12/06 PFOA (ppb) NA NA NA NA NA 89.0 10.1 27.1 412 2.5 21.5 12.3 8.36 8.08 3.58 2.12 2.52 1.45 1.02 PFOA Field Duplicate (ppb) NA NA NA NA NA 87.5 NA NA NA NA 21.8 12.0 8.77 8.14 3.70 2.12 2.49 1.51 1.06 Table Notes: ppb: parts per billion (ug/L) NA: data not available for sampling period PFOA Avg (ppb) 602 766 1028 310 58 88.3 NA NA NA NA 21.7 12.2 8.56 8.11 3.64 2.12 2.50 1.48 1.04