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HomeMy WebLinkAboutNC0000272_Dissolved Oxygen Above Clyde Doc._20071019BLUE RIDGE PAPER PRODUCTS INC. 19 Oct 2007 Roger Edwards Regional Supervisor Division of Water Quality North Carolina Department of Environment and Natural Resources Asheville Regional Office 2090 US Highway 70 Swannanoa, North Carolina 28778 Re: Dissolved Oxygen Above Clyde on 10/16/2007 Canton Mill NPDES NC0000272 Dear Mr. Edwards — p E C E I V D OCT 2 2 Zorn WATER QUALITY SECTION ASHEVILLE REGIONAL OFFICE As discussed with you on 10/17/2007, the daily average dissolved oxygen (DO) in the Pigeon River above Clyde on 10/16 was 4.95 mg/l. From our discussion and considering DO meter accuracy, rounding and significant figures in the Canton Mill permit limits for DO, the Division determines that this value is in compliance with applicable requirements. The Division also agrees that requirements to monitor DO at sampling stations DN3 and DN4 below Clyde were not triggered. Blue Ridge Paper started the Site E (Thickety) oxygen station on the Pigeon River at 2 pm on 10/16. The decision to start the oxygen station was made after a dissolved oxygen (DO) measurement in the Pigeon River above Clyde of 4.3 mgfl on the morning of 10/16. This was the first time during the current exceptional drought that measured DOs above Clyde have dropped to this extent. After starting the oxygen station, we continued to monitor river DO and obtained a daily average DO reading above Clyde of 4.95 mg/l for 10/16. The DO measured above Clyde at 10 am on 10/17 was 6.4 mg/1 indicating that the oxygen station is having a positive effect. The DO above Clyde measured on 10/18 was 6.1 mg/l. The permit limit for dissolved oxygen above Clyde is a daily minimum not less than 4.0 mg/l and a daily average not less than 5.0 mg/l. Both permit limits are expressed with one decimal. Under our permit sampling procedures, we record and report field DO measurements to 2 decimal places. The accuracy of our field DO meter (Hach HQ30D + LD 101-30 DO probe) is plus or minus 5 percent. Considering the accuracy of our field DO meter, rounding and the significant digits in the permit limit, the daily average DO measured at Clyde on 10/16 works out to 5.0 mg/I. Blue Ridge Paper will code DO measurements above Clyde on 10116 in the October 2007 discharge monitoring report as compliant. Sincerely — Paul S. Dickens cc: C. File Water Manager, Environmental Affairs Internal distribution 828-646-6141 175 Main Street • PO Box 4000 Canton, North Carolina 28716 • 828-646-2000 Raising Your Expectations MichaelF. Easley, Govemor January 13, 2003 Mr. David E. Jenkins Director of Conservation and Public Policy American Canoe Association 7432 Alban Station Boulevard Suite B-232 Springfield, Virginia 22150-2311 Mr. VVU Callaway Executive Director Tennessee Environmental Council 1700 Hayes Street Suite 101 Nashville, Tennessee 37203 Re: Gentlemen: Natural Resources Blue Ridge Paper Products, Inc. NPDES Permit No. NC0000272 William G. Ross Jr., Secrelary I am in receipt.•ofyour letter, dated November 19, 2002, requestinginformal discussions to resolve a described dispute over the implementation of the 1997 "Settlement Agreement Concerning 1996 Water Quality Color Variance and 1996 NPDES Permit (NC0000272) issued to Champion International Corporation". In the letter you voice various concerns over the permitting and performance of the Canton Mill, which is now -operated by Blue Ridge Paper Products, Inc. pursuant to an NPDES permit issued by the State of North Carolina in November 2001. While I appreciate your concernsand I share your goal of continued and steady improvement to the water quality in the Pigeon River, I do not agree that the 1997 Settlement Agreement governs any resolution of these issues. The permit and. variance that were based on the 1997 Settlement Agreement have now been replaced by the currently -effective permit and variance which were issued in November 2001. 1601 Mail Service Center, Raleigh, Norlh Carolina 27699-1601 Phone: 919-733-49841 FAX: 919-715-30601 Internet: www.enr.state.ne.us/FNR/ � tau 4wirvP'/f •nn.tAyn Emw,n•;H.Rr.•ett ita vmymvme oew ppppp� - - Page Two January 13, 2003 Re: Blue Ridge Paper Products, Inc NPDES Permit No. NC0000272 We concluded in 2001 that the conditions placed in the permit will assure that Blue Ridge Paper will achieve significant improvements in its color loading discharge to the Pigeon River. As you will recall, the basic structure of the permit calls for a series of steps to lower the lbs/day of color based on demonstrated performance and process changes. As the deadlines and .milestones of the permit are reached, we will learn more about what can be attained and determine the necessity of continuing the color variance in the next permit period. I am willing for our Department to meet with you to discuss the mill's performance and the permitting timelines. If you are amenable to such a meeting, perhaps in the Asheville area, I will be glad to invite the appropriate officials of the company, the EPA and the Tennessee agencies and counties. -Please contact Alan lGimek, Director of the Division of Water Quality (919/733-7015), if you believe such a meeting would be helpful. Thank you for the letter and thank you for your commitment to environmental protection and natural resources conservation. Sincerely, William G. Ross, Jr. _ Secretary cc: James Palmer David.Moreau Robert Ray Justin Wilson Paµl Davis Iliff McMahan RoW Dykes Bob Williams Alan Kmek Dan Oakley Status of Champion, Canton, NC 1997 Settlement Agreement The following is a status of the elements contained in Champion at Canton, NC 1997 Settlement Agreement in Paragraphs 32 and 33. Paragraph 32 focused on " Assistance to downstream communities and community input," while Paragraph 33 focused on, "Ecological assessment of the Pigeon River system and the Waterville Reservoir." All of the other commitments in the agreement were included in the permit and variance issued by NC and are reported on by them. Champion sold the Canton mill to Blue Ridge Paper Products (BRPP) in 1999. BRPP assumed responsibility for the Settlement Agreement as a result of that sale. - EPA will identify available programs, initiatives, and technical resources within the agency which may support and further such (recreation, tourism, and other economic opportunities) development opportunities in Cocke County. Status; EPA did provide information on the above matters to the County and followed up with communications on those matters. EPA continues to provide the County with advice and consultation on a variety of matters. - EPA will also work closely with TVA on its Quality Communities Initiative, the goal of which is to develop a long-term economic development strategy for Cocke County and surrounding areas. Status; This program was initiated in 1997. EPA has both discussed the program and offered our assistance to the members, but has not been called upon for specific inputs. We understand that the program is not meeting frequently at this time. - N.C. and TN will foster joint planning and public input by establishing a joint Watershed Advisory Committee. Status; First committee meeting held on May 25, 2000. - Champion will establish a facility Community Advisory Committee. Status; A committee was established by BRPP. The first meeting was held on February 2, 2000, and the second meeting was held on March 27, 2000. EPA Region 4 May 25, 2000 EPA will lead, in cooperation with NC and TN, an independent evaluation of current information on the Pigeon River. Evaluation will include convening a group of scientists to evaluate existing data, identify additional data needed, and if necessary, to conduct an ecological assessment. Also, determine whether any significant ecological or health risks exist. If so, what if any, steps could be taken to address those risks. Status; EPA has contracted with TVA to compile all existing data into a useable database (this is the first step in this task). A draft report is expected in May 2000. EPA will convene a group of scientists to evaluate the data, when the report is finalized. EPA Region 4 May 25, 2000 J,„IED sr"eB - O o i�ryf,1 N+01E l� UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION a ATLANTA FEDERAL CENTER 61 FORSYTH STREET, SW ATLANTA. GEORGIA30303-8909 January 8, 1998 [See Addressed List Attached] SUBJ: Champion permit Matter Gentlemen: RECEIVED JAN 1 3 1997 LEGAL AFFAIRS Enclosed is a copy of the final, fully executed Settlement Agreement in the above_ referenced matter. I would like to take this opportunity to thank each of you with whom I had occasion to work on this project for the high level of professionalism and courtesy which you brought to this matter. I thoroughly enjoyed working with each of you and look forward to the opportunity to do so in the future. Attachment Encl. Sincerely, Mary J.I11 Associate lligto ttomey Racyclod/Rorycioble • Primed wlm Vegetable 00 Based bda on 100%Recycled Paper (40%Posiconsumer) ADDRESS LIST Barn Turner Deputy Attorney General Office of the Attorney General Cordell Hull Building*. 2nd Floor 425 5th Avenue North Nashville, TN 37243-0495 Paul E. Davis, Director Division of Water Pollution Control TN Department of Environment and Conservation 6th Floor L & C Annex 401 Church Street Nashville, TN 37243-1534 Daniel C. Oaklev Senior Deputy Attomev General NC Department of Justice 114 West Edenton Street Suite 311 Raleigh, NC 27602 Forrest R. Westall Regional Water Quality Supervisor NC Department of Environment and Natural Resources Division of Water Quality, Asheville Regional Office 59 Woodfin Place Asheville, NC 28801 BenjaminS. Bilus . Senior Associate Counsel Champion International Corporation One Champion Plaza Stamford, Connecticutt 06921 David E. Jenkins Director of Conservation and Public Policy American Canoe Association, Inc. 7432 Alban Station Boulevard, Suite B-226 SprinofPid_ NIA 22150-2311 John Noel Pigeon River Coordinator Tennessee Environmental Council 1700 Haves Street, Suite 101 Nashville. TN' 37203 Honorable James E. Robinson Mayor. Citv of Newporr P.O. Box 370 Newport, TN 37822 Mr. Harold Cates Cocke Countv Executive Court House Annex. Room 146 360 East Main Street Newport, TN 37821 _AGREEMENT REGARDING 3996 WATER OII TTTV COLOR VARIAND RMIT IESUEn TO Atrvrrns -'T"' mTION T, QQEPORATION I. INTRODUCTION 1• The United States Environmental Protection Agency (EPA), the State of North Carolina (North Carolina), the State of Tennessee (Tennessee), Cocke County, Tennessee (Cocke County), the City of Newport, Tennessee (Newport), the Tennessee Environmental Council (TEC), the American Canoe Association i (ACA), and Champion International Corporation (Champion) enter into this Settlement Agreement to resolve the concerns of Tennessee, Cocke County, Newport, TEC, and ACA with the amended modified water quality color variance granted by North Carolina to Champion on December 11, 1996, and approved by EPA on December �. 26, 1996, and with the NPDES permit issued by North Carolina to Champion on December 12, 1996. It is also intended that this Agreement will be the basis for resolution of the contested case proceeding pending before the North Carolina Office of Administrative Hearings to which all of the foregoing, except EPA, are parties. II. PROCEDURAL HISTORY 2• Champion operates a bleached kraft pulp and paper mill on the Pigeon River at Canton, North Carolina, and discharges treated wastewater from its mill operations, domestic wastewater from the Town of Canton, and leachate from its active landfill into the river. The Pigeon River below Canton is designated by North Carolina as a Class C river (secondary recreation, fishing, `-" aquatic life, including propagation and survival, and wildlife) and flows from North Carolina northwestwardly into Tennessee. Under the Federal Water Pollution Control Act (commonly referred to as the Clean Water Act), 33 U.S.C. § 1251 Q.t seo., and under North Caroiina's Water and Air Resources Act, N.C. Gen. Stat. §§ 143-211 ,et Z_eZ., Champion is required to have an NPDES permit for -these discharges. 3. Until January 1, 1997, when the permit issued on December 12, 1996, by the State of North Carolina took effect, Champion was operating its Canton mill under an NPDES permit issued by EPA, effective October 25, 1989. EPA issued that permit after objecting to, and subsequently vetoing, the permit that North Carolina had issued to Champion in mid-1985_ EPA vetoed the North Carolina permit on the grounds that it did not reasonably ensure compliance with Tennessee's narrative water quality criteria for color. On November 13, 1985, EPA notified Champion that it had assumed permitting authority for the Champion permit. North Carolina and Champion challenged EPA's authority to take over the permit in federal court. In 1987, the District Court for the Western District of North Carolina rendered an opinion upholding EPA's permitting authority. , 648 F.Supp. 1390 (W.D.N.C. 1987). This opinion was upheld by the Fourth Circuit Court of Appeals in 1988, Chamn;on �pn 850 F.2d 182 (4th Cir. 1988), and EPA issued its permit on September 25, 1989. Champion and the Dead Pigeon River Council appealed the EPA permit. After an administrative hearing. before EPA Administrative Law Judge Thomas B. Yost, the permit I was upheld on February 12, 1992. 4. in 1988, the NPDES Committee -of the North Carolina I Environmental Management'Commission granted Champion a variance from the North Carolina narrative water quality criterion for color. EPA approved this variance on August 11, 1988. S. The EPA -issued permit and the North Carolina color variance have operated together to control the contribution of effluent color by Champion to the Pigeon River, by the use of a Predictive model and a color limitation.of 50 true color units on a monthly average basis at the North Carolina/Tennessee state line. 6• Champion's EPA -issued permit for the Canton mill (NPDES Permit No. NC0000272) was set to expire on October 24, 1994. On March 28, 1994, Champion applied to the North Carolina Department { of Environment, Health and Natural Resources (NCDEHNR) for renewal of this permit. At that time, North Carolina advised Champion that it believed EPA was the proper permitting agency, since EPA had assumed control of the facility's permit in the Previous permit cycle. Champion, therefore, applied to EPA for a renewal on April 15, 1994. EPA then advised Champion that North Carolina was, in fact, the proper permitting agency, and Champion filed its renewal application with North Carolina on November 18, 1994. 7• The 1988 color variance was reviewed by the North Carolina Environmental Management Commission as a part of its triennial. revie•;; and w3G continued on May 12, 1993. On November 29, 1994, EPA approved the continued variance. 8• On June 6, 1996, North Carolina conducted a public hearing in Haywood Count I v, North Carolina, to consider renewal of NPDES 'permit No. ZIC0000272 and modifications to the 1988 color variance. A public comment period extended for thirty (30) days after the public hearing. The effluent color limitation for the Canton mill was one of the issues subject to comment. 9• Tennessee provided public comment at the hearing as well as in writing thereafter through the Tennessee Department of Environment and Conservation (TDEC) and .the Tennessee Wildlife Resources Agency (TWRA), Those comments stated that color in the river in Tennessee was still objectionable, particularly during the low -flow Period from mid -summer through fall. The comments further stated that additional conditions needed to be placed on effluent color to meet the Tennessee narrative water quality t' criterion for color. ACA members also participated in the public hearing. TEC provided written comments which also raised objections to the noticed permit. EPA also provided comments on the publicly -noticed draft permit by letter, dated July 3., 1996. TEC and ACA also subsequently submitted additional comments to EPA expressing concerns regarding the permit and variance. 10. Following the public hearing, North Carolina, Tennessee, EPA and Champion attempted to resolve the color issue through several formal and informal mechanisms. Based on the public record and EPA's comments, a proposed final permit was prepared on October 1, 1996. The North Carolina NPDES Committee then modified the 1988 Color variance uil uctober 15, 1996. 11. Discussions among North Carolina, Tennessee and EPA continued thereafter; additional targets for continued color reductions and more restrictive mass -based color limits were Placed in the permit and variance by North Carolina, based on comments received, and Tennessee was added as a specifically - named member of the Variance Review Committee, which would periodically consider the variance conditions. These changes were documented in the variance modification by a new Amended Order of the North Carolina NPDES Committee issued on December 11, 1996, and in the permit issued on December 12, 1996. 12- EPA Region 4 supported the December 1996 variance amendments by letter dated December 9, 1996; and EPA Region 4 subsequently approved the amended color variance modification by letter dated December 26, 1996. 13- By letter dated December 23, 1996, Tennessee advised EPA that it considered the permit to be invalidly issued and that North Carolina had failed to comply with § 402(b)(5) of the Clean Water Act, 33 U.S.C. § 1342(b)(5). Subsequently, on January 13, 1997, Tennessee filed a contested case petition with the North Carolina Office of Administrative Hearings challenging the permit and color variance. Thereafter, Champion, Cocke County, and Newport were allowed to intervene in the North Carolina contested case proceeding. 14. In an effort to resolve the color issue without time - and resource -consuming litigation, North Carolina, Tennessee, Cocke County, Newport, Champion, and EPA agreed to an informal negotiation process. The North Carolina contested case proceeding was stayed during this process until September 26, 1997. On November 21, 1997, TEC and ACA. were also allowed to intervene in the North Carolina contested case proceeding. 15. The agreements which follow constitute what the parties to this Agreement believe to be an appropriate and reasonable resolution of the pending disputes surrounding the contested Permit and variance. P.11 parties to this Agreement are committed to the ultimate achievement of water quality standards in the Pigeon River, both in North Carolina and in Tennessee. This Agreement and the modified variance and .the permit resulting therefrom represent a major step toward that goal. At the same time, the parties recognize that there is further work to be done and they are committed to attaining further reductions in color in the river at the quickest possible pace. III. TECHNOLOGY MODIFICATIONS TO THE VARIANCE/PERMIT �.. 16. The parties hereby agree to the following measures to achieve additional color reduction over that required in the permit issued on December 12, 1996 and by the color variance adopted on December 11, 1996 [hereinafter the December 1996 Permit and variance]. The parties further agree that the December 1996 permit and variance will be modified [hereinafter the 1997 Permit and the Revised Variance] to reflect these requirements and effectuate this Settlement Agreement. Except as modified by the Settlement Agreement, all other provisions of the December 1996 permit and variance, including the monitoring and reopener provisions, will be maintained in the 1997 Permit and the Revised Variance. 17• The December i996 permit and variance required that Champion implement a one-year demonstration of full-scale bleach filtrate recycling (BFR'Y) technology on the mills pine line and that, as of December 1, 1998, Chamoion implement and operate BFR" technology on its Dine line, unless Champion could demonstrate to the NPDES Committee that BFR" was not commercially viable. Champion has nearly completed the process of the required demonstration phase of BFR". Based on the results of the demonstration effort, Champion commits to continue the full operation of the BFR'" technology on the mills pine line on a continuing basis, subject to the process set forth in Paragraph 22. 18. The 1996 permit and variance required Champion to `. evaluate the potential for additional minimization of color losses from the manufacturing processes and raw material storage areas (i.e. in -mill color minimization; or, spill Prevention/control measures) that might result in further color reductions and to report its findings to the NPDES Committee. Reports were to be submitted by March 1, 1998 and again by June 1, 2001, so that they could be used by the Committee in conjunction with the required variance review process held every three years to determine if the variance would be readopted or made more stringent. As a part of the efforts to resolve the challenge to the 1996 permit and variance, a Technology Review Workgroup was fcrmed, cu3neris-d o, experts on the pulp and paper industry from EPA and representatives of the environmental agencies for the States of Tennessee and North -Carolina. The Technology Review Workgroup shall replace the -previously existing North Carolina Variance Review Committee and shall be maintained during the life of the 1997 Permit in order to make the recommendations and determinations 'which this Agreement calls for such Workgroup to make. The Technology Review Workgroup shall, at all times, be chaired by EPA and be comprised of three technical representatives from EPA with expertise on the pulp and paper industry, two environmental agency -representatives from the State of Tennessee, and two environmental agency representatives from the State of North Carolina. The Workgroup shall make itself available to consult with and provide information to community representatives at appropriate times. In addition, consistent with any limitations under law or regulation relating to confidential business information, copies of all written reports and recommendations generated pursuant to this Agreement shall be provided to the parties to the Agreement at least 20 days before any recommendation or determination by the Workgroup becomes final. The Workgroup shall review any comments or input received on such documents prior to making its final recommendations or determinations. Any comments or input received by the Workgroup shall be made available to all parties to this Agreement. 19. Working with the Technology Review Workgroup, Champion has already begun the process of identifying and implementing Possible prevention and control measures wnich can be Laken to further reduce color discharges from the mill. Champion commits to Eurther evaluate mill operation so as to fully identify opportunities for preventing and controlling measurable black f liquor leaks and spills (best management practices - BMPs). This evaluation will include gathering more extensive and detailed data on sources of color within the mill to substantially improve the accuracy of measurements, to improve the mill's existing BMP Program, and to complete efforts to identify, quantify and substantially improve the accuracy of a mass balance of sources of leaks and spills of black liquors, including unmeasured sources and discharges during periods of fiber line disruption. Such BMPs include: further upgrading and integrating of sewer monitoring (e.g., additional flow measurement and sampling stations to facilitate more comprehensive and daily monitoring of sources) and automated mill process control systems with t' operational procedures and management oversight to reduce black liquor leaks and spills; continuing operator training; identifying and implementing additional controls for known but unmeasured sources (e.g., evaporator set, knot rejects bin, etc.) Of liquor losses; modifying the digester area to facilitate capturing leaks and spills; diverting clean water discharges; and capturing and recycling liquors during fiber line disruptions through detailed scheduling of planned outages and contingency Planning for unplanned outages. Champion also commits to thoroughly evaluate additional measures to modify its process operations and controls to remove or reduce sewer generated color. 20. Champion agrees to provide a report to the Technology Review workgroup and the NPDES Committee no later than June 1, 1998. This report will identify a strategy and time line for I implementing those color reduction measures identified is Paragraph 19 until the target effluent limitations in Paragraph 24 are met or ail measures in Paragraph 19 have been fully implemented. The report will include an explanation of and rationale for both the implementation strategy and the proposed time line. The report will also identify those measures which will be implemented in the event that the effluent limitations set out in Paragraph 22 are not achieved by the color reduction measures specified in that paragraph. 21. Four BMPs which have already been identified as having both a high potential for achieving color reduction and a high level of implementability are: a) installation of replacement digester recirculation pumps and a spill collection sump; b) I installation of a pine courtyard Parshall flume slide gate; c) installation of weak black liquor tank containment, and; d) correction of evaporate set demister clogging, installation of condensate instrumentation and sampling ports for the evaporator set, and assurance of continued'dry conveying of knot rejects. Champion commits to fully implement all four of these BMPs by June 1, 1998. 22. The 1996 permit and variance required that the annual average effluent true color loading should not exceed 98,168 lbs/day and that the monthly average true color loading should not exceed 125,d3d lbs/day. Based on current demonstrated achievable levels which have resulted from measures that Champion has already undertaken to reduce color from the mill, the parties agree that the 1997 Permit and Revised Variance shall provide that beginning January 1, 1998, the monthly average discharge of true color from the mill shall not exceed 95,000'lbs/day. Based on an analysis of the available data from the BFR7" demonstration Project and the spiil prevention/control measures that have already been identified by Champion and the Technology Review Workgroup as being implementable in the near -term, it is anticipated that full-scale implementation of BFR� on the pine line combined with the four BMPs identified in Paragraph 21 will reduce annual average color loading by approximately 40% below the limits in the December 1996 permit. Therefore, the 1997 Permit and Revised Variance will require that, beginning December 1, 1998, the annual average discharge of true color shall not { exceed 60,000 lbs/day and the monthly average true color loading shall not exceed 69,000 lbs/day. However, if by October 1, 1998, the Technology Review Workgroup determines, and the NPDES Committee agrees, that there are overwhelming technical, economic or operational barriers to Champion's ability to attain the above -stated color loading limits, the Technology Review Workgroup shall recommend to the NPDES Committee the alternate interim limits to become effective December 1, 1998. The Workgroup shall, at the same time, also recommend to the NPDES Committee a new effective date for achieving an annual average color loading limit of 60,000 lbs/day. These recommendations shall be based on what the Workgroup concludes CLamoion can reasonably be expected to achieve, giving due consideration to the demonstrated discharge levels which the mill has, in fact, achieved and taking into account the evaluations conducted pursuant to Paragraph 19 and the report submitted by Champion pursuant to Paragraph 20. Based on the Workgroup's recommendations, the NPDES Committee will determine the alternate interim limits to become effective on December 1, 1998, as well as a new effective date for achieving an annual average color loading limit of 60,000 lbs/day. The permit will then be modified in accordance with North Carolina's permitting process to reflect these determinations. 23. The 1996 permit and variance required Champion to evaluate color reduction strategies for further optimization of BFR"` technology and to report on the feasibility of implementation on the hardwood line. Champion commits to begin L implementation of that portion of the BFR technology which involves the recycling of the Eo stage of the hardwood line by no later than January 1, 1999. Champion further agrees to provide an evaluation of that implementation as well as the potential for full implementation of the BFR"' technology on the mill's hardwood line to the Technology Review Workgroup and the NPDES Committee by December 1, 1999. The evaluation will include data reflecting the color reduction benefit gained from the partial implementation and a projection of potential color reduction benefit to be gained from full implementation of the BFR technology on the hardwood line. 24•. Based on the work that Champion and the Technology Review Workgroup have already done in the area of in -mill color r �` reduction measures, it is anticipated that further color reductions, beyond those to be obtained by BFR' on the pine line in combination with the four BMPs identified in Paragraph 21, could be expected after implementation of the BMPs and measures to reduce and/or remove sewer generated color identified in Paragraph 19, and partial BFR"' (i.e., recycle of Eo filtrate) on the hardwood line_ This combined package of in -mill color reduction measures (i.e., the four BMPs in Paragraph 21, the additional BMPs and sewer -generated color.reduction measures identified in Paragraph 19 as implemented pursuant to Paragraph 20, full implementation of BFR on the pine line, and partial BFR on the hardwood line) shall hereinafter collectively be referred to as the Near -Term Package. it is further anticipated that full implementation of the Near -Term Package could be effectuated by tr June 1, 2000, resulting in a target color annual average loading within a range of 48,000-52,000 lbs/day. Champion shall submit to the Technology Review Workgroup by January 1, 2001, a report on the feasibility of achieving a target annual average color loading limit within the range of 48,000-52,000 1bs/day based on full implementation of the Near -Term Package. This report shall include all available data necessary to derive the lowest achievable annual average and monthly color loading limits. By April 1, 2001, the Technology Review Workgroup shall recommend, considering the feasibility report submitted by Champion and the demonstrated performance of the mill, the lowest achievable annual =.ver - ...ge .inf !nnntht.. -, color loading effluent limitations. The Workgroup evaluation and recommendation report shall be submitted to the NPDES Committee and the other pafties to this Agreemenc. If the recommended limits are within the target r range, the limits shall become effective on May 1, 2001, by written notification from the Director of the North Carolina Division of Water Quality. If the limits determined to be achievable by the Workgroup are not within the target range, the Permit shall be modified in accordance with North Carolina's permitting process to reflect those limits. The Workgroup,s recommendation of limits under this Paragraph shall take into account appropriate effluent variability. 25. The 1996 permit and 'variance contain provisions to limit color in the Pigeon River at the NC -TN state line to a maximum monthly average of 50 true color units. The new effluent limitations in this Agreement at Paragraphs 22 and 24 are more stringent than the provisions in the 1996 permit and variance and will result in color levels at the state line well below 50 true color units. It is possible to calculate the monthly flow at the Hepco gage above which instream color will not exceed 50 true color units for any specific color discharge from the Champion facility. Using the 69,00o lbs/day monthly average true color loading limit anticipated in Paragraph 22 to become effective December 1, 1998, the flow which will provide for color less than 50 true color units at the Hepco gage is 330 cubic feet per second (cfs). Therefore, the parties to this Agreement agree that the scope and magnitude of the 1996 variance will be reduced in the Revised Variance to proviae t::at: e_feutve December 1, 1998, color in the Pigeon River at the Hepco gage shall be less �• than 50 true color units whenever monthly average flows are greater than 330 cfs. The parties to this Agreement further agree that should alternate interim limits be set pursuant to Paragraph 22, or when monthly limits are established pursuant to Paragraph 24, the above variance conditions will be revised in accordance with the above approach. Using North Carolina's governing flow criteria (30Q2), historical flow records, and the December 1, 1998 effluent limits in Paragraph 22, it is expected that color in the Pigeon River at the Hepco gage will be less than 50 true color units 91W of the applicable time. Similarly, using the May 1, 2001 effluent limits in Paragraph 24, it is expected that color in the Pigeon River at the Hepco gage will be less than 50 true color units 96% of the applicable time. Champion agrees to cooperate fully with any periodic independent monitoring (including activities such as splitting samples) requested by EPA or the State of North Carolina. In -stream monitoring data gathered during the 1997 Permit term will be evaluated at the end of the 1997 Permit term to determine whether the limits established under the Permit, in fact, attained the color levels as expressed in the Variance. This information will be used to develop new requirements for the next permit which further reduce color levels in the Pigeon River. 26. As Paragraph 25 recognizes, there could still be some periods of time, corresponding to periods of lower flows in the river, when color at the Hepco gage might exceed 50 true color units. Champion agrees to develop a contingency plan for mitigating the occurrence and degree of these potential exceedances which correlates measures designed to achieve mitigation with periods of lowest flow, with -particular attention being given to periods of higher recreational use in the river. In developing the plan, Champion shall evaluate anv reasonable means,-ncluding scheduling of maintenance, intermittent treatment, and production curtailment, which would achieve additional color reductions during temporary periods of lower flows in the river, when color at the Hepco gage might exceed So true color units. The contingency plan shall be submitted by December 1, 1998, for review by the Technology Review Workgroup. Champion agrees to work in good faith with the Workgroup to resolve any issues which arise during this review in order to achieve a mutually acceptable plan. By February 1, 1999, the Technology Review Workgroup will recommend to the NPDES Committee either approval of or modifications to the plan. The NPDES Committee will approve the contingency plan, either as submitted or with the changes the Committee determines are appropriate. The plan shall become effective upon approval, which shall be no later than March 1, 1999. 27• Champion commits to, and North Carolina will direct, the continuing improvement of existing process and related technologies which could improve the efficiency of all water - using equipment and operations throughout the mill, with the goal of meeting North Carolinas water quality standards under the Clean Water Act without a variance. 1�96 Fc=^it and variance required Champion to evaluate and report to the NPDES Committee on end -of -pipe color reduction technologies that could conceivably be implemented at the mill. The evaluation was to include an incremental color improvement analysis which concentrated on the technical, economic, and operational feasibility of the application of these technologies on a continuous or intermittent basis. The intermittent application of these technologies was to look particularly at periods of low river flow. These reports were to be submitted to the NPDES Committee for its consideration as part of the water quality standards Triennial Reviews to determine whether the variance should be readopted or made more stringent. The reports were to identify specific economic and implementation issues associated with the incremental improvement of color levels expected by installing these technologies at the mill. They were also to project the expected additional color reduction possible using the identified technology. The first such evaluation/report, which was due March 1, 1998, has essentially been completed as a result of the Technology Review Workgroup,s efforts. A subsequent evaluation/report was to be due March 1, 2001_ Champion agrees to provide this evaluation/report, together with an updated report on the results of all ongoing and any additional planned color reduction activities, to the Technology Review Workgroup and the NPDES Committee March 1, 2001. The Technology Review Workgroup shall evaluate this combined report and make recommendations to the NPDES Committee for further color reduction targets for inclusion in the next NPDES permit. ' 29. The parties agree that the 1997 Permit shall require that Champion and any successor -in -interest to Champion's ownership and/or operation of the Canton mill use their best efforts in good faith to implement the BFR-'A technology, BMPs and other color reduction measures in accordance with the terms of this Agreement, and to achieve the effluent limitations required by and to be determined under this Agreement, as well as the effluent limitation targets required by Paragraph 24. 30. The 1997 Permit shall also provide that neither Champion nor any successor -in -interest to Champion's ownership and/or operation of the Canton mill will increase the mill's current pulp production capacity during the permit term, unless this can be done in way that also reduces color loading. 31. Champion's Canton mill already meets or exceeds the technology requirements of the Pulp and Paper Cluster Rule for Climits on dioxin. The 1997 Permit shall require that the Canton mill continue to meet those requirements. All other requirements of the Cluster Rule, including any monitoring requirements, will apply to Champion in accordance with timeframes established pursuant to the Rule. IV. ASSISTANCE TO DOWNSTREAM COMMUNITIES AND COMMUNITY INPUT 32. The parties to this Agreement recognize the concerns Of communities downstream from the Champion mill regarding the economic impacts that may have resulted from Champion's discharge over the years. The parties are committed to working with those downstream communities to assist in the developmerr ^f recreation, tourism, and other economic opportunities in those areas. EPA will identify available programs, initiatives, and technical resources within the Agency which may be available to support and further such development opportunities in Cocke County. EPA will also support and work closely with TVA on its Quality Communities Initiative, a community based effort being undertaken by _'VA, the coal of which is to develop a long-term economic development strategy for Cocke County and surrounding areas. In addition, :forth Carolina and Tennessee will foster joint planning and public input on decisions affecting the Pigeon River by establishing a Joint Watershed Advisory Committee and Champion will establish a facility Community Advisory Committee. V. ECOLOGICAL ASSESSMENT OF THE PIGEON RIVER SYSTEM AND THE WATERVILLE RESERVOIR 33. Over the years, a number of studies have been conducted by various entities on the health of the aquatic biological community in the Pigeon River and, in particular, analysis of fish flesh contamination. However, EPA believes that a more current evaluation of the level of contaminants remaining in the system and the cverall health of the river and of the Waterville Reservoir should be undertaken. ,EPA will lead, in cooperation with North Carolina and Tennessee, an independent evaluation of current information on the Pigeon River. The evaluation will include convening a group of scientists to evaluate existing data, to identify additional data needed, and, if necessary, to conduct an ecological assessment. EPA agrees to take the lead in convening the scientific panel. The information gathered from such an assessment would be used to determine .:hether any significant ecological or health risks exist, and, if so, what, if any, steps could and should be taken to address those risks. VI. ADDITIONAL COVENANTS AGREEMENTS OF THE PARTIES ��• In consideration of the covenants and agreements made by the other parties to this Settlement Agreement, North Carolina covenants and agrees to modify the amended modified color variance granted to Champion on December 11, 1996, and to revise NPDES Permit No. IIC0000272 issued to Champion on December 12, 1996. to reflect the requirements found in Section _iII of this Settlement Agreement. North Carolina agrees that these modifications to the variance and permit will be made and the 1997 Permit and Revised %rariance incorporating those requirements will be finalized and will become effective no later than December 31, 1997. North Carolina agrees that it will not further modify the 1997 Revised Variance prior to the triennial review, or further modify the 1997 Permit prior to its expiration in 2001 except as provided in this Agreement, unless North Carolina seeks to impose more stringent requirements in the variance and/or the permit to protect water quality. North Carolina agrees to conduct public,hearings on Champion's next NPDES permit renewal application by June or July of 2001 and to make its decision on reissuance of the NPDES permit, as well as its decision on extension of or modifications to the color variance, by October 31, 2001. 35. In consideration of the covenants and agreements made by the other parties to this Settlement Agreement, Champion agrees to the modifications to be made by North Carolina to the r variance granted it on December 11, 1996, and to the NPDES _permit issued to it on December 12, 1996. Champion further agrees not to seek administrative or judicial review of the 1997 Revised Variance and/or the 1997 Permit as long as they are consistent with this Agreement. Champion agrees to submit its NPDES permit renewal application for the Canton mill no later than March 1, 2001. 36. In consideration of the covenants and agreements made by the other parties to this Settlement Agreement, Tennessee, Cocke County, Newport, TEC and ACA agree that they will neither Oppose EPA's approval of the 1997 Revised Variance, nor request that EPA object to the 1997 Permit. Tennessee, Cocke County, Newport, TEC and ACA further agree that, they will not seek administrative or judicial review of the 1997 Revised Variance and/or the 1997 Permit so long as they are consistent with this i Agreement. The same parties further agree that they will not seek to have any change in water quality standards that Tennessee might make during the life of the 1997 Permit effective against Champion prior to the next permit term. 37. EPA has reviewed and considered the proposed changes to the December 12, 1996 permit and the December 11, 1996 variance called for by this Agreement in accordance with its obligations under the Clean Water Act. EPA hereby represents that as long as the 1997 Permit and Revised Variance are consistent with this Agreement, it will approve the 1997 Revised Variance and will not object to the 1997 Permit. 38. Tennessee, Cocke County, Newporc, —C, ACA, North Carolina and Champion agree to enter into an agreed order to i resolve the North Carolina contested case proceeding, Stare of �•� t � n H ?P^d r•�t i a Pr t No. 97 EHR 0041. ' That agreed order, which will be filed with the Administrative Hearing Officer as soon as the 1997 Permit and Revised Variance have both been issued, :rill incorporate by reference this Settlement Agreement and will constitute a dismissal with prejudice of the contested case Petition. The agreed order also will reflect that North Carolina Senior Administrative Law Judge Fred G. Morrison is suitable to all parties as a mediator of any disputes that may arise regarding North Carolinas or Champion's compliance with this Settlement Agreement. Disputes will be presented to Judge Morrison if the parties are unable to reach resolution under the informal dispute resolution procedures specified in Section VII Of this Settlement Agreement. VIZ. DISPUTE RESOLUTION 39- North Carolina, Tennessee, Cocke County, Newport, TEC, ACA and Champion agree that should a dispute arise regarding compliance with, this Settlement Agreement by any of those parties, the parties shall first attempt to resolve the dispute informally, it is the 'intent of the parties that EPA, which is not a party to the North Carolina contested case proceeding, may participate so as to facilitate informal dispute resolution if requested by any Other :arty to do so, and if EPA chooses to do SO. 40, As a condition precedent to a party bringing any civil suit for breach of this Settlement Agreement, that party must first attempt to resolve the purported dispute as expeditiously as possible within the following framework. All time frames for informally resoiving disputes may be lengthened by mutual consent. Each of the parties will designate a representative for infor al dispute resolution. A party representative claiming that a dispute has arisen will summarize the dispute in writing, and circulate the written summary to all other party representatives within five (5) working days. If the party representatives fail to resolve the dispute within twenty (20) working days, the parties agree that any party, except EPA, shall next seek resolution of the dispute by calling for a formal mediation, to be conducted by Senior Administrative Law Judge Fred G. Morrison. Notwithstanding any other provision in Paragraphs 39 & 40 of this Agreement, if a dispute arises regarding this Agreement, the parties agree that any party may make any administrative or judicial filing necessary to avoid the running of any limitations period for bringing such administrative or judicial action. 41. All the parties agree that should a dispute arise regarding any actions EPA is to undertake as part of this Settlement Agreement, the parties shall attempt to resolve the dispute informally. All time frames for informally resolving disputes may be lengthened by mutual consent. Each of the Parties shall designate a representative for informal dispute resolution. These representatives may be the same representatives designated under, paragraph 40, above. A party representative claiming that a dispute has arisen shall summarize the dispute in writing, and circulate the written summary to all other party representati•.as within five (5) working days. The Party representatives will endeavor to resolve the dispute within twenty (20) working days. For any such dispute, EPA's party representative will init`ally be designated by the Region 4 Administrator. If the parties are unable to resolve the dispute with the Region 4 representative, any party may request that EPA Headquarters designate a representative for that particular dispute, and the parties, ;;corking with the EPA representative, Will have an additional ten (10) working days to resolve the dispute. VIII- RESERVATION OF RIGHTS 42- The covenants and agreements set forth in this Settlement Agreement do not pertain to any matters other than / those expressly specified in the Settlement Agreement. All \ parties reserve, and this Settlement Agreement is without Prejudice to, all rights any party,to this Agreement may have - to this Agreement with respect to all against any other part other matters. IX. EFFECTIVE DATE 43. Each party shall execute the signature page of this Settlement Agreement and return the executed signature page to EPA. The Settlement Agreement shall become effective upon EPA's receipt of executed signature pages from all of the parties. Upon receipt of all executed signature pages, EPA shall immediately issue a notice letter ail - r;.ies st ring the date on which the Settlement Agreement became effective. The parties all acknowledge that because this Settlement Agreement is intended to be the basis for resolution of the North Carolina j' contested case proceeding, SLatp 2f m r � Caron - n=n, ---- -ir -North - LQ -, No. EHR C041, Tennessee was required to have the Settlement Agreement approved through its statutory compromise and settlement procedure before it executed the Agreement. Under Tenn. Code Ann. § 20-3-103, the settlement of any litigation to which Tennessee is a party must be approved by the Attorney General and Reporter, the Comptroller of the Treasury, and the Governor. North Carolina was required to have the Settlement Agreement approved by the Department of Environment and Natural Resources as the agency responsible for issuing the permit, and by the NPDES Committee, as the agency responsible for issuing the variance. (r X. AUTHORIZED SIGNATURES 44- Each of the undersigned representatives of the parties certifies that :.e or she is fully authorized by the party he or she represents to enter into the terms and conditions of this Settlement Agreement and to le all g y bind suc1i party to this Agreement. IT IS SO AGREED: UNITED STATES ENVIRONMENTAL: By: AGENCY / . �. John H. HankinsJr. Date: Regional Administrator 9 STATE /O1n1F NORTH CAROLINA By; yne M . Date: Wayne McDevitt Secretary, DENR By: .. B e.0,az Daniel V. Date: 1ZfsOjS) Besse Chairman, 14PDES Commit`ee [$ustel—n ng to original si dated 12/22/971 SF T L: B/ P. Wilsonate.ty Governor for Policy IM --u r;. luates— — County Commissioner te: 4l - CITY OF dEWPORT, NNESSEE l ames E. Rob nson Date: Z,2 7 Mayor TENNESSEE ENVI ONMENTAL COUNCIL John NoelDate: / _� .. ,� _ •� Pi eon g ive-r:-Coordinator SSO IATION By. David E. l Date: JC-nk ns Director 6f,6onservation and Publis�policy CHAMPION 75 PORAT N By; Richai '� Date: Senior Vi rPOrlc, Preside t, Environm nt, Health & Safety �_ [Conforming to original signature dated 12/19/971 Pigeon River Science Panel Data Review and Recommendations Prepared for U.S. EPA — Region 4 61 Forsyth St., SW Atlanta, GA 30303 Prepared by Anna Hamilton Lee Wilson & Associates, Santa Fe, NM Kay Johnson Tetra Tech, Inc., Lafayette, CA Rob Plotnikoff Washington State Department of Ecology, Olympia, WA Final Report 2005 i River Science Panel Review Executive Summary Background and Issues Final The Pigeon River flows almost 70 miles northeast from its headwaters in North Carolina to its confluence with the French Broad River in Tennessee. The Pigeon River basin includes several tributaries and a few urbanized areas. Most of the watershed is forested, with some agricultural development near the river. The river also supports a significant recreational industry. In 1908, the Blue Ridge Paper Mill (previously operated by Champion Paper) was established on the Pigeon River near Canton, North Carolina, at about river mile (RMv1) 64. The paper mill discharges treated wastewater from mill operations, domestic wastewater from Canton, and leachate from an active landfill. Other discharges to the river below the mill include several wastewater treatment plants (WWTPs). Another significant feature along the river is Walters Dam at RM 39, operated by Progress Energy (formerly Carolina Power & Light Company) for hydropower generation. In the past, the mill 'discharge resulted in high loadings of color and biochemical oxygen demand (BOD), low dissolved oxygen (DO) concentrations, low pH, high bacterial counts, high conductivity, total suspended solids (TSS) and total dissolved solids (TDS), increased nutrient loading, increased temperatures, and toxins including dioxin, furan, and chloroform. There is a history of contested permits, lawsuits, and interventions associated with the mill. The paper plant began modernizing its facilities and operations in 1990. One notable improvement to the pulping process was changing from chlorine bleaching to oxygen delignification, which eliminated further discharge of dioxin. In 1997, a Settlement Agreement was signed by several government and non-profit organizations involved in the contested permitting. The Settlement Agreement includes the call for "a current evaluation of the level of contaminants remaining in the system and the overall health of the river and the Waterville Reservoir." EPA took this responsibility and convened a Science Panel to address the following objectives: Evaluate existing data, including its quality, comparability, pertinence to existing issues, and completeness. Identify additional data, if needed to fill existing data gaps, and focus future monitoring efforts. Conduct an ecological assessment, if possible, as a summary of existing conditions and a framework for understanding any remaining concerns. This report is a result of a short-term, intensive review of existing Pigeon River data, and based on that, of existing river conditions, conducted by the Science Panel. The Pigeon River Science Panel selected a limited number of data parameters for review, based on their importance for assessing ecological conditions within this river system and the availability of data. Assessment efforts focused on the main stem of the river. River Science Panel Review Status of Pigeon River Data Final The extant data on the Pigeon River reflects nearly two decades (1983 to 2004) of pollution studies and permit monitoring. These data are a valuable asset and, despite the diversity of study objectives and approaches, provide considerable information about this system. Nevertheless, one of the biggest single deficits of the existing Pigeon River knowledge base is its lack of continuity. This includes various spatial and temporal discontinuities, as well as lack of continuity in sampling and analysis methodologies. For example, water quality data were collected regularly between 1987 and 1998, but only for select sites in North Carolina. Similarly, benthic macroinvertebrate and fish community data are sporadic. Although benthic sampling is conducted annually, most stations are not sampled every year, and there are only a few years in which spatial comparisons above and below the paper mill can be made. Also, sampling methods and methods of calculating benthic community indices differ between North Carolina and Tennessee, making it problematic to compare results, even when synoptic sampling occurred. The most complete temporal record of fish community monitoring is for two locations in Tennessee, with other locations not sampled in most years. The most complete spatially synoptic fisheries sampling occurred in 1995. Toxicant data consist almost entirely of annual monitoring for 2,3,7,8 TCDD & TCDF (dioxin & furan) in fish tissue, although fish species and sample locations have varied over time. Other types of toxicants, such as releases from the W WTPs and landfill discharging to the river, have not been characterized recently. Condition of the Pigeon River Ecosystem Major changes in water quality conditions occurred following changes to the paper pulping process in the early 1990s. Significant improvements occurred in water quality variables including color and TDS. Total Suspended Solids concentrations below the mill outfall declined to resemble upstream conditions following 1993. Long-term changes in DO concentrations below the paper mill were difficult to interpret, due to the limited number of measurements compared to the typically high short-term variability and complex dynamics of this variable. Biological responses to the paper mill discharge are evident within the benthic and fish communities, although substantial improvements over time clearly occurred. In addition to possible mill effluent effects, benthic community patterns suggest responses to spatial differences in habitat, and possibly to other inputs (e.g., tributaries, WWTPs, non -point source runoff). Downstream fish communities show an increasing diversity of native species, supplemented by a re -introduction program, suggesting there is substantial improvement in ecological condition of the lower Pigeon River, with the potential for continued recovery. Following modernization of the mill, dioxin concentrations in all fish species sampled decreased substantially. Based on these data, the States of North Carolina and Tennessee rescinded consumption advisories for all fish, except for carp in Waterville Reservoir. The convergence of two conditions: 1) settling zone for organics, and 2) depositional zone for historic dioxin loads may promote higher risk of contaminant exposure in the carp population. River Science Panel Revieiv Science Panel Recommendations for Future Activities Final Integration and Management of Data. Greater utility of existing information and future comparisons would derive from centralized banking of data, statistical summary and review of data, and development and maintenance of meta -data. A focused effort should be made to add biological, water quality, and toxics data collected since 1998 to the existing electronic database. Future Monitoring Efforts. Future monitoring of water quality and biological communities should be conducted within the framework of a cooperative monitoring program, to assure comparability of methods and results, achieve greater spatial coverage of aquatic resources, and realize greater efficiency and cost savings. An integrated program could address multiple objectives beneficial to government agencies and regulated businesses. Duplicate data collection efforts (e.g., fish tissue analyses for dioxins) should be refocused and/or halted. Periodic synoptic benthic surveys of the river should be conducted. Sampling should include locations immediately upstream and downstream of the paper mill outfall and extend to the French Broad River. Methods should be uniform, quantitative, and documented, with consideration given to adopting the EMAP Wadeable Streams protocols. Continuous monitoring of DO, temperature, and conductivity should occur below the paper mill outfall, immediately above the Waterville Reservoir, at the base of the bypassed reach, and at the mouth of major tributaries. A 5-year review process is recommended to confirm that dioxin levels in sportfish remain below levels of health concern. Bottom feeding fish sampling in the reservoir could also be reduced to a 5-year sampling frequency since dioxin levels have remained relatively stable over at least the past 5 years. Additional sampling of sediments and other biota could provide important information on dioxin "sinks" in the river and reservoir. Sediment Transport Modeling. Mapping the location of contamination in depositional zones and describing the rate and quantity of sediment transport is necessary to determine risk to species that are potentially exposed to pollutants. Detailed Risk Analysis. Additional information is needed to conduct a full ecological risk analysis, including identifying specific stress sources, defining the contribution of variations in habitat condition, and defining the areas of greatest exposure. In addition, information is needed on indicators of organism response besides species presence and abundance, and on contaminant levels or responses of higher trophic levels. In order to understand the ecological risks posed by the dioxins remaining in fish and sediments, an evaluation of the potential for accumulation in predators, such as otter or birds of prey, may need to be conducted. River Science Panel Review Table of Contents Executive Summary 1.0 Introduction. Final Page 1.1 Background............................................................................................................1 1.2 Issues.......................................................................................................................2 1.3 Science Panel..........................................................................................................3 2.0 Panel Approach..................................................................................................................3 2.1 Identifying and reviewing available data.............................................................3 2.2 Focus on Selected Analyses...................................................................................4 3.0 Characterization of Available Data .... :............................................................................. 5 3.1 Range and Type of Data........................................................................................5 3.2 Water Quality Data................................................................................................6 3.3 Biological Data.......................................................................................................8 3.3.1 Benthic Macroinvertebrates.........................................................................8 3.3.2 Fish Community Characterizations...........................................................11 3.3.3 Periphyton...................................................................................................13 3.4 Dioxin and Other Toxicological Data.................................................................13 4.0 Characterization of Environmental Condition.............................................................17 4.1 Water Quality Analysis/Evaluation....................................................................17 4.2 Biological Analysis/Evaluation...........................................................................19 4.2.1 Benthic Macroinverlebrates.......................................................................19 4.2.2 Fish Community Characterizations...........................................................20 4.3 Dioxin Evaluation (Human Health Risk)...........................................................23 4.4 Fish Criteria Relative to Current Toxicity Evaluations...................................25 4.5 Integration of "Key" Observations....................................................................27 5.0 Recommendations ............................................................................................................28 5.1 Future Monitoring Efforts..................................................................................28 5.2 Integration and Management of Data................................................................30 5.3 Sediment Transport Modeling............................................................................31 5.4 Detailed Risk Analysis.........................................................................................31 6.0 Literature Reviewed and/or Cited..... .................................3 2 iv River Science Panel Review List of Tables Final Table Page Zones along the Pigeon River mainstem defined for purposes of evaluation of existing data and of ecological conditions...........................................................................4 Sources of data for water quality evaluation in select reaches of the PigeonRiver, NC and TN....................................................................................................8 Availability of fish community results (species composition and abundance and IBI) from TVA in select reaches identified by zones (see Section 2) of the Pigeon River, NCand TN.................................................................................................................... Average changes in elevation (feet per mile) for defined zones within the mainstem PigeonRiver, NC and TN......................................................................I...........................20 Species composition and abundance of fishes at various sampling locations along the Pigeon River, NC and TN, 1995 and 2003........................................................................22 Target list of fish species expected to occur in the Pigeon River, TN...............................24 Acceptable fish tissue concentrations .26 , River Science Panel Review Figure Final List of Figures Page Map of Pigeon River features (adapted from CP&L 2002)...............................................36 Map of Pigeon River basin, showing sampling stations with definition of zones (A-H) alongthe mainstem............................................................................................................37 Temporal and spatial patterns for water Color observations (units) described by "zones" in the Pigeon River that extend from North Carolina and end in Tennessee. Data describing Color units and'variance for each year may originate From one or more stations within each zone. (The error bars represent one standard Deviation about the mean.)........................................................................................... 4 Temporal and spatial patterns for Total Dissolved Solids (TDS) concentrations (mg/L) described by "zones" in the Pigeon River that extend from North Carolina and end in Tennessee. Data describing TDS concentrations and variance for each year may originate from one or more stations within each zone. (The error bars represent one standard deviation about the mean.)............................................................39 5 Temporal and spatial patterns for Total Suspended Solids (TSS) concentrations (mg/L) described by "zones" in the Pigeon River that extend from North Carolina and end in Tennessee. Data describing TSS concentrations and variance for each year may originate from one or more stations within each zone. (The error bars represent one standard deviation about the mean.)............................................................40 6 Annual average stream flow in the Pigeon River near Hepco, NC (USGS gage 403459500), RM 45.1, 1980-2002.....................................................................................41 7 Temporal and spatial patterns for Ammonia (NH3-N) concentrations (mg/L) described by "zones" in the Pigeon River that extend from North Carolina and end in Tennessee. Data describing NH3-N concentrations and variance for each year may originate from one or more stations within each zone. Data collected from zone "e" in 2004 are represented by a single observation collected from surface water at two locations in Waterville Reservoir. (The error bars represent one standard deviation aboutthe mean.) ....................................... .......... ........................................ I ...................... 42 Temporal and spatial patterns for Total Nitrogen (TN) concentrations (mg/L) described by "zones" in the Pigeon River that extend from North Carolina and end in Tennessee. Data describing Total Nitrogen concentrations and variance for each year may originate from one or more stations within each zone. Data collected from zone "e" in 2004 are represented by a single observation collected from surface water at two locations in Waterville Reservoir. (The error bars represent one standard deviation about the mean.)..................................................................................43 vi River Science Panel Review Figure Final List of Figures (continued) Page Temporal and spatial patterns for Total Phosphorus (TP) concentrations (mg/L) described by "zones" in the Pigeon River that extend from North Carolina and end in Tennessee. Data describing TP concentrations and variance for each year may originate from one or more stations within each zone. Data collected from zone "e" in 2004 are represented by a single observation collected from surface water at two locations in Waterville Reservoir. (The error bars represent one standard deviation aboutthe mean.).................................................................................................................44 10 Temporal and spatial patterns for Dissolved Oxygen (DO) concentrations (mg/L) described by "zones" in the Pigeon River that extend from North Carolina and end in Tennessee. Data describing DO concentrations and variance for each year may originate from one or more stations within each zone. Data collected from zone "e" in 2004 are represented by a single observation collected from surface water at two locations in Waterville Reservoir. (The error bars represent one standard deviation about the mean.)...... .........45 11 Number of EPT taxa in benthic communities of the Pigeon River in North Carolina and Tennessee, September 2001 (from CP&L).................................................................46 12 Number of EPT taxa in benthic communities of the Pigeon River in North Carolina July 2002 (from NCDENR)...............................................................................................46 13 Number of EPT taxa in benthic communities of the Pigeon River in North Carolina below the Blue Ridge Paper Mill (Zone "d") from 1983-2002.........................................47 14 Fish Index of Biotic Integrity (IBI) for several locations along the Pigeon River, NC and TN, collected by TVA in 1990 and 1997.............................................................47 15 Number of native species of fishes along the length of the Pigeon River, from above the paper mile discharge (RM 64.5) to Tannery Island, TN (RM 8.2), 1995....................48 16 Fish Community Index of Biotic Integrity (IBI) at two locations on the lower Pigeon River, TN, Denton (RM 16.5) and Tannery Island (RM 8.2), 1988-2003 (from Charles F. Saylor, personal communication, 2005)...........................................................48 17 Number of Native Fish Species collected from the Pigeon River at two locations on the lower Pigeon River, TN, Denton (RM 16.5) and Tannery Island (RM 8.2), 1988-2003..49 18 TCDD concentrations measured in all fish species sampled at RM 64.5 (non -detects reported at the detection limit)...........................................................................................49 River Science. Panel Review List of Figures (continued) Figure Final Page 19 TCDD concentrations measured in three fish species (not including carp) sampled at RM 64.5 (non -detects reported at the detection limit).......................................................50 20 TCDD concentrations measured in all fish species sampled at RM 59 (non -detects reported at the detection limit)...........................................................................................50 21 TCDD concentrations measured in all fish species sampled at RM 52,3 (non -detects reported at the detectionlimit............................................................................................51 22 TCDD concentrations measured in two fish species (not including carp) sampled at RM 52.3 (non -detects reported at the detection limit).......................................................51 23 TCDD concentrations measured in all fish species sampled at RM 41.5 (non -detects reported at the detection limit)...........................................................................................52 24 TCDD concentrations measured in five fish species (not including carp) sampled at RM 41.5, at head of reservoir (non -detects reported at the detection limit)......................52 25 TCDD concentrations measured in all fish species sampled at RM 39, near dam in reservoir (non -detects reported at the detection limit).......................................................53 26 TCDD concentrations measured in six fish species (not including carp) sampled at RM 39, near dam in reservoir (non -detects reported at the detection limit)......................53 27 TCDD concentrations measured in six fish species sampled at RM 19 (non -detects reported at the detection limit............................................................................................54 River Science Panel Review Final Pigeon River Science Panel Data Review and Recommendations 1.0 Introduction The Pigeon River drainage is set in the Blue Ridge Mountain physiographic province and flows eastward and north to the Tennessee Ridge and Valley province. The headwaters of the Pigeon River are buried in the steep -sided valleys of the Blue Ridge Mountains where there is a limited amount of farming and logging. Towns located in the upper drainage are limited in size by the surrounding geography and by the natural resources in the region. The lower end of the drainage has wider valleys as it enters the Tennessee Ridge and Valley ecoregion. Farming interests that include a tomato -growing industry become prevalent and a burgeoning recreation industry has provided economic growth to the region. Walters Dam provides white -water rafting opportunities, canoeing, and recreational fishing expeditions in the lower portion of the drainage and this attracts over eighty -thousand visitors per year. Addressing past and existing water pollution problems are paramount in this region as the Pigeon River is the focus for most of the local economy's success. 1.1 Background The Blue Ridge Paper Mill (previously operated by Champion) is located near Canton, North Carolina, and discharges to the Pigeon River at approximately river mile (RM) 63.3 (Figure 1). The mill is located at the transition from a high -gradient reach classified as Class A trout waters, to a lower -gradient reach with waters classified as cool -water fisheries. Major upstream tributaries are the east and west forks of the Pigeon River. Major tributaries within North Carolina below the mill include Richland Creek, Jonathans Creek, and Cataloochee Creek. At about RM 41.5, the river enters Waterville Reservoir, created by Walters Dam at RM 39, and operated by Progress Energy (formerly operated by Carolina Power & Light Company [CP&Lj) for hydropower generation. Water is withdrawn from the lake through a bypass tunnel to the hydropower facility located near the state line with Tennessee, at about RM 26. The "bypassed" portion of the Pigeon River, between RM 39 and RM 26, is supplied with flow from tributary streams and groundwater. The Pigeon River then flows for 26 miles through Tennessee to its confluence with the French Broad River. The paper mill discharge includes treated wastewater from mill operations, domestic wastewater from the town of Canton, and leachate from its active landfill. The mill is permitted to discharge 29.9 million gallons per day (MOD), and the discharge can represent up to 90% of total river flow below the discharge at low flow. As such, the paper mill is a major discharger on the Pigeon River. However, there are more than 20 other discharges to the river below the mill (NCDENR, 2003), including the Waynesville wastewater treatment plant (W WTP) (6 MOD) and Maggie Valley's W WTP (1 MOD). Erosion and nutrient runoff from agricultural lands within River Science Panel Review Final the watershed also influence the river, including cattle and dairy farms (watershed land use within North Carolina is classified as 14% pasture), and cultivated crops. Still, most of the watershed within North Carolina is forested (about 84%). Some influence of urbanization comes from the major towns, including Canton, Waynesville, Lake Junaluska, and Clyde in North Carolina, and Denton and Newport in Tennessee. 1.2 Issues A river, whose value to local residents was once based on its native fauna, was changed forever when the paper mill was established in 1908 (Coombs, 2004). At its inception and for many subsequent decades, the paper mill discharged pollutants to the river with little restriction. The mill discharged in North Carolina and was regulated in North Carolina, but river-bome pollutants traversed the state line into Tennessee. During the ensuing years, pollution issues were protested by local citizen groups in the State of Tennessee. Conditions created by the mill discharge that impacted native fauna included high loadings of color and biochemical oxygen demand (BOD), low dissolved oxygen (DO) concentrations, low pH, high bacterial counts, high conductivity, total suspended solids (TSS) and total dissolved solids (TDS), increased nutrient loading, increased temperatures, and toxins including dioxin, furan, and chloroform. Other aesthetical and environmental issues included foam and odor. These by-products of the pulping process remained for decades until stronger regulation forced change. The change was influenced in part by a lawsuit brought against the State of North Carolina by the State of Tennessee. An alteration in the pattern of river hydrology and effluent distribution in the lower mainstem of the river occurred with the establishment of Walters Dam in 1930. To an extent, this structure blocked pulp mill effluent by filtering sediments and dissolved pollutants along the length of the Waterville Reservoir. The presence of Walters Dam has helped abate pollution in a portion of the drainage, but has changed the hydrologic cycle in the lower Pigeon River. The mill itself started modernizing its operations in about 1990. One notable improvement was changing from chlorine bleaching to oxygen de-lignification, which eliminated further discharge of dioxin. Contested permitting, interventions and associated legal proceedings eventually resulted in a Settlement Agreement in 1997, signed by all involved parties including several government and non-profit organizations. An updated operating permit (NPDES) was issued to the pulp mill in 2001 in order to improve quality of its discharge effluent, which, upon reaching the river, would not cause water quality violations in this Class C water as outlined by North Carolina environmental law. The paper mill has been and is currently in compliance with all of its discharge limitations, including consistently passing its required Whole Effluent Toxicity (WET) tests. A current draft NPDES permit issued by the State of North Carolina outlines a complex set of rules for effluent quality and considers river discharge a major natural influence on assimilation capacity of the Pigeon River. River Science Panel Review 1.3 Science Panel Final Numerous ecological studies have been conducted since the 1980s by various entities to characterize river conditions relative to the mill discharge. These have included the status of biological communities, and of toxic contaminants. Most of these studies provide data useful for characterizing river conditions. However, almost all recent sampling is divided among various entities and provides examples of spatially or temporally limited sampling, and few comprehensive or synoptic studies. No single entity currently sampling on the Pigeon River is responsible for synthesizing all recent existing data. Undoubtedly in light of this multiplicative situation, the 1997 Settlement Agreement includes, among other terms, the call for "a current evaluation of the level of contaminants remaining in the system and the overall health of the river and the Waterville Reservoir". EPA took the responsibility for implementing such an overarching evaluation of current status, and convened a scientific panel to address the following objectives. • Evaluate existing data, including its quality, comparability, pertinence to existing issues, and completeness. • Identify additional data, if needed to fill existing data gaps, and focus future monitoring efforts. • Conduct an ecological assessment, if possible, as a summary of existing conditions and a framework for understanding any remaining concerns. 2.0 Panel Approach 2.1 Identifying and reviewing available data Data pertinent to the Pigeon River system have been collected over a relatively long time frame (at least since the 1980s), by many different entities (e.g., state and federal government agencies, industries, consulting scientists), and for a variety of objectives. As a result, sources of data tend to be distributed. In addition, there have been many competing interests and objectives regarding this river system, and the issues associated with the industrial activities on the river have been controversial. This generates an ongoing need to fully understand the system and make maximum use of existing information. An initial effort to address this need and gather existing information from diverse sources into a unified database was undertaken for EPA Region IV by Tetra Tech, and is reported in Tetra Tech (2004). The result of the necessarily limited Tetra Tech effort was a prototype database produced in a specialized application of Access®, called the Ecological Data Application System (EDAS). The Pigeon River EDAS database includes much of the existing Pigeon River data for the period 1983-1998. Types and sources of data incorporated into this database are fully described in Tetra Tech (2004), and specifics regarding availability of data are discussed in this report by category (water quality, biological data, and toxins). The EDAS database represented readily accessible data to the Science Panel, and was the source of information first evaluated. Existing limitations in the database that resulted from River Science Panel Review Final circumstances attending its development (e.g., data from some sources could not be made available to Tetra Tech in a timely manner, much existing biological data were never entered into any electronic format), became limitations for Science Panel evaluations. Data limitations are mainly discussed in the body of this report, which include the absence of methods descriptions, station descriptions, completeness for some data (e.g., types of fish analyzed for dioxins) and quality information for data that have been incorporated into the database. Because of the wide variety of data sources and lack of any commonality in application of station names, the first step was to plot all sampling stations included in the EDAS database using GIS. The distribution (and clustering) of stations on the resulting map was based on major features along the river such as: the location of the paper mill discharge, location of the reservoir, and location of the hydro -generating facility (point of re -introduction of mainstem river water to the river channel). Zones were identified by grouping sampling stations that were influenced by similar natural or human disturbances. These zones are shown in Figure 2, and described in Table 1. Table 1. Zones along the Pigeon River mainstem defined for purposes of evaluation of existing data and of ecological conditions. Zone River Miles Description A 69-65.5 Upper Pigeon R. mainstem, above mill discharge B 65-64 Immediately above mill discharge C 62-60 Immediately below mill discharge D 59-45 Between mill discharge and reservoir E 43-41.5 Immediately above reservoir F 38 -26 Bypassed reach G 26-14 Below hydroelectric facility to near Denton, TN H 9-7 Mainstem near Tannery Island, TN Two additional zones were also identified for the reservoir, designated by river mile. These are located at RM 41.5, at the head of the reservoir, and RM 39, near the reservoir dam. The next step in data evaluation was to tabulate each parameter of interest by location (zone) and date in order to assess the extent of data available. Once the extent of available data from the EDAS database for selected parameters was determined, the potential availability of recent data was determined by review of hardcopy reports, data sheets, and of individual Excel® files provided mainly by the Tennessee Wildlife Resources Agency (TWRA) or entered from hardcopy sources to support analyses by the Science Panel. Hardcopy sources of data are described in the main body of this report by category (water quality, biological data, and toxins). 2.2 Focus on Selected Analyses The Science Panels' objectives for evaluating the condition of existing data as well as the existing condition of the river were approached within specific constraints. The value in assessing existing data is in defining broadly what has been studied, and where there are significant gaps in important information. It was therefore not the intent of the Panel to catalogue all available data and assess its quality. The Science Panel was convened to conduct a River Science Panel Review Final short-term, intensive review, including one week of focused effort for orientation, data review and evaluation, and framing of a report, with approximately two subsequent weeks for completion of the report. Within this timeframe, and considering any data limitations discovered during the first week of effort, the Panel took the approach of selecting a limited number of parameters for review based on importance to the issues within this river system and availability of data. In addition, the Panel focused assessment efforts on the mainstem of the river. While there are tributary data available, this increase in scope of assessment was not deemed warranted to address the Panel's objectives. 3.0 Characterization of Available Data 3.1 Range and Type of Data Data have been generated from the Pigeon River drainage for more than two decades. Several agencies and private companies have contributed to this base of information. For example, Blue Ridge Paper Products and Progress Energy generated over ten years of data as conditions outlined by operating permits. The following is a list of government and private contributors to the base of known information included in this analysis: United States Environmental Protection Agency (U.S. EPA) Region 4 United States Forest Service United States Geological Survey U.S. EPA MDSD U.S. EPA Headquarters U.S. EPA Environmental Research Laboratory Tennessee Valley Authority North Carolina Division of Environment and Natural Resources North Carolina Environment, Health, and Natural Resources Tennessee Department of Environmental Quality Carolina Power and Light (now Progress Energy) Champion International Corporation (now Blue Ridge Paper Products) Tennessee Division of Environment and Conservation Tennessee Wildlife Resources Agency Period ofRecord. Data examined in this review were collected from between 1983 and 2004. Water Quality data had been collected from the earlier time period through 1998 with limited records in 2001 and 2004. Biological information was collected throughout the period of record (POR), but on a discontinuous basis. The greatest effort in biological characterizations and evaluation of changes occurred at the lower portion of the drainage in the State of Tennessee. Accumulation of toxins (e.g., dioxin, furan, chloroform) in fish tissues were collected from 1987 through 2004. Specific dates included in evaluations for this review are reported in detailed discussions of water quality, biological data, and dioxin including other toxicological data. River Science Panel Review Final Format (electronic or hard copy). Data evaluation began with examination of the Tetra Tech EDAS database. The largest volume of readily available electronic information described water quality conditions. However, recent water quality information was restricted to hardcopy reports. Most of the data describing toxicological concentrations in fish tissues and other compartments of the ecosystem were found in hardcopy reports. Biological descriptions of benthic macroinvertebrate and fish community evaluations were also found primarily in hardcopy reports. Hardcopy information was transferred into electronic format and eventually incorporated into graphical form for further examination. The literature reviewed and relevant information used for this report are found in Section 6.0 (Literature Reviewed and/or Cited). 3.2 Water Quality Data Period of Record. Water quality data examined for this review included sporadic records produced from 1983 through 1987. Following 1987, records were more consistently generated by Progress Energy (formerly Carolina Power and Light) and by Champion International Corporation (now Blue Ridge Paper Products). Continuous data at select sites along the mainstem Pigeon River were available from 1987 to 1998. The longest records for water quality monitoring were generated by Carolina Power and Light at four locations beginning from above the town site of Canton, North Carolina to the powerhouse at RM26. Additional water quality records were obtained from the Tennessee Department of Environment and Conservation in the lower reaches of the Pigeon River. The sites at Denton and Tannery Island generated information for 1987 and 1988. Few records exist for water quality at these sites beyond 1988. Pollution problems originating from pulp mill effluent discharged into the Pigeon River prompted monitoring designs by both private companies (pulp mill and power generator) to enable partitioning of pollution effects on water quality and biological communities. The pollutants were characteristic of two pulping processes (chlorine bleaching prior to 1994 and presently oxygen de-lignification) and hydrologic modification through operation of a hydropower dam at approximately River Mile 39 (RM 39). These monitoring sites generated long-term records that were useful for determining improvements in water quality over the past decade. Format (electronic or hard copy). Records through 1998 were, extracted from the EDAS database and analyzed for increasing/decreasing patterns over the ten year period of record at key locations of the drainage. Some of the water quality parameters were discontinuous over space and revealed location of data gaps. A limited amount of recent water quality information (2004) was extracted from hardcopy reports and was plotted independently from electronically available data on graphs describing total nitrogen, total phosphorus, dissolved oxygen; ammonia -nitrogen concentrations, and water temperature. These data were restricted to two locations within the Waterville Reservoir; near the head (Zone "e") and near the Walters Dam. Data Ouality Evaluation. The longest period of record for water quality available at any of the sites is restricted to four locations: immediately above the town site of Canton (effluent outfall), mainstem Pigeon River before the Waterville Reservoir, below Walters Dam (RM33.0), and at the powerhouse (RM26.0). This served as the basis for the most complete long -tern evaluations River Science Panel Review Final of water quality conditions. Following 1998, data were available at select stations and restricted to a sub -set of the original variables monitored for the longer term effort. Water quality sampling data is absent from immediately below the effluent outfall on the Pigeon River mainstem. The current discharge permit requires extensive monitoring at several locations below the effluent outfall (Permit No. NC0000272, Forrest Westfall). This is an important addition to monitoring information for evaluating the output of nutrients on an annual and seasonal schedule. Information regarding performance of laboratory analysis was generally unavailable. Therefore, quality assurance records for batch laboratory analysis of samples were not examined as part of this review. Factors that affect analysis of water quality data for pattern or trend over longer time periods are: differences in analytical methods among data sources, sample batch performance of the instrumentation (e.g., detection limits, bias, data qualifiers), and consistency in field collection protocols. Quality assurance information was unavailable for the water quality records contained in the EDAS database and so was assumed to meet standard requirements for each analyte. The water quality information included in EDAS is located in the U.S. EPA STORET database and will have data quality designations. The generators for the bulk of the data analyzed are assumed to have used high quality laboratory analytical services. Selection ofData for Characterization. Degradation of water quality in the Pigeon River mainstem was historically related to the Blue Ridge Paper Products mill. A select group of water quality variables that could be altered by the effluent discharged into the river was monitored over time. These variables included those with secondary effects to chemical characteristics of the receiving water like dissolved oxygen or temperature. The remaining primary variables were selected based on direct influence the pulping process had on water withdrawn from the river and then returned following treatment of the wastes. The primary water quality characteristics evaluated in this review were: color, temperature, dissolved oxygen, total dissolved solids, total suspended solids, total nitrogen, total phosphorus, and ammonia concentrations (see Table 2). Most of these variables have related monitoring requirements described in the recent draft discharge permit issued by the State of North Carolina (Permit No. NC0000272, Forrest Westfall). Those not included in the draft permit were used to determine changes to ecosystem function in reaches throughout the Pigeon River Basin. River Science Panel Review Table 2. Sources of data for water quality evaluation in select reaches of the Pigeon River, NC and TN. Final Sources of Data (Zones) . Water Quality Variable Carolina Power and Light Tennessee Valley North Carolina WQD Authority Temperature 1995-1998 (a); 1987-1998 (e,f,); 1987-1988 (g) ' Color 1987-1998 (a,e,fg), 2001 (a,e,f) 1983 (b,e,f,g) 1983-1997 (b,d,e) Dissolved Oxygen 1987-1998 (a,e,f,g); 2001 (a,e,f) 1983 (b,e,f,g); 1994 1983-1997 (b,d,e) Total Dissolved Solids 1995-1998 (a); 1987-1998 (e,f,g); 2001 (a,e,f) Total Suspended Solids 1995-1998 (a); 1987-1998 (e,0; 1987-1988 (g); 2001 (a,e,t) Total Nitrogen 1995-1998 (a); 1987-1998 (e, f ; 1987-1988 (g); 2001 (a,e,t) Total Phosphorus 1995-1998 (a); 1987-1998 (e,f); 1987-1988 (g); 2001 (a,e,t) Ammonia 1987-1998 (b,e,f,); 2001 (a,e,t) 3.3 Biological Data 3.3.1 BenthicMacroinvertebrates Period ofRecord. Various types and/or sources of benthic data have been collected from different locations in the Pigeon River from 1983 to 2004. Collections were, in general, once per year, however, there were usually only a few stations sampled in any one year. As a result, there are only a few years within the period of record (POR) when data were collected at multiple locations upstream and downstream in the mainstem Pigeon River where a synoptic survey used comparable methods. ' In North Carolina, benthic community indices are reported most frequently (11 of the 20 years in the POR) for the Pigeon River just upstream of the Blue Ridge Paper Mill (approximately river mile (RM) 64.5). The month in which the annual collection occurred varied, but was most often in July, August, or September. Benthic community indices also were reported relatively frequently (10 of the 20 years) at a location downstream of the paper mill, at about RM 57.5, and less frequently (4 of the 20 years) at a third downstream location, at about RM 42.5. Overall, there were four years (1988, 1994, 1997, 2002) during which benthic community index results were reported for three locations. River Science Panel Review Final It should be noted that within the 1983-2004 POR, some benthic survey results are available for other locations within the Pigeon River sub -basin, including the east and west forks, and several tributaries. Typically, sampling was conducted at these locations in one to four years within the POR, though a few (e.g., Cataloochee Creek) were sampled more frequently. Tributary data were not evaluated further in this report, as discussed above in Chapter II. In addition to benthic index results, some benthic community data, listing taxa and relative abundances, exist for the same three general locations described above (the vicinities of RM 64.5, 57.5, and 42.5), for several years within the 1983-2004 POR. Years in which taxa/occurrence data exist for all three locations include 1984, 1986, 1988, 1994, and 1997. In Tennessee, benthic community index and taxa/occurrence data are reported annually for 1998- 2003 for two locations on the Pigeon River mainstem, Denton (about RM 16.5, zone "g") and Tannery Island (about RM 8.2, zone "h"). The month of collection for each year was usually July. Format (electronic or hard cony). Only sporadic portions of existing benthic macroinvertebrate data are available in electronic format. Some benthic community data (taxa and occurrence) from the Pigeon River within North Carolina, including the three mainstem locations discussed above, were available on EPA's STORET system, and were entered into the Pigeon River EDAS database (Tetra Tech, 2004). A selection of benthic community index data from several locations in both North Carolina and Tennessee was available on an ArcView GIS project, and was downloaded from ArcView into Excel format for this review. These included three mainstem Pigeon River locations in North Carolina and two in Tennessee. More details on this GIS project and its status in relation to the Pigeon River database can be found in the database report (Tetra Tech, 2004). Remaining benthic data exist in hard -copy reports, and on data sheets. Sources include a report by EA (2001) on river -wide sampling conducted in 2000, a report by Carolina Power & Light (CP&L, 2002) reporting on sampling conducted in 2001; and a basin -wide assessment report by North Carolina Department of Environment and Natural Resources (NCDENR) on the French Broad Basin (2003). Hard -copy data sheets recording benthic taxa/occurrence and community index results at the Denton and Tannery Island sampling locations on the Pigeon River in Tennessee were provided by the Tennessee Valley Authority (Charles Saylor, TVA, personal communication, 2005). Data Quality Evaluation. Review and comparison of protocols used by different entities to sample benthic macroinvertebrate communities in the Pigeon River suggest there are potentially important differences, particularly between North Carolina and Tennessee. Sample collection differences were discerned in the approach to defining and selecting the distribution of microhabitat types to be sampled at a station, in how many microhabitat "subsamples" are composited to create a station sample, and in how the level of sampling effort is defined and controlled. Although multi -habitat collections generate larger species lists, sampling in riffle habitat using quantitative collection protocols, or sampling among microhabitats in proportion to their occurrence at each site, would generate results that have a greater likelihood in detecting effects from stressors. Sampling standardized based on total activity time at a station is River Science Panel Review Final inadequate to assure comparability among sampling locations and dates, if numbers of sub - samples taken and/or size of areas sampled are not also standardized. These differences can lead to method -related variation in proportional representation of taxa that could confound interpretation of spatial patterns. In addition to the comparability limitations of the benthic sampling, there is an apparent lack of quantitative habitat data, and/or existing habitat characterization results were not consistently documented and reported. As a result, it is difficult to separate stressor effects on benthic communities below the paper mill (habitat vs. contaminant concentrations). This in part contributes to the conclusion that a comprehensive eco-risk assessment is not possible with the current status of available benthic community characterizations and supporting habitat data. In addition, the methods used to calculate community indices differ between North Carolina and Tennessee. North Carolina uses a state -specific index called Biotic Integrity (BI), which is tailored to the communities and levels of taxonomic identification used in North Carolina. In Tennessee, the index used is called the Index of Biotic Integrity (IBI), but may also be slightly altered from. the national standard. The indices are likely appropriate to their local applications, and provide internally consistent results; but are likely to introduce unaccountable variation if results from similar collection dates are combined in order to do river -wide (i.e., across -state) evaluations. Although North Carolina clearly generated benthic community taxa and relative abundance data for each sample, these results were not made available in hard copy (or electronically). These would have been useful for an ecological assessment, both for direct comparison to other sampled locations, and for evaluation of index results that otherwise differed between agencies. Other data quality problems were encountered in the course of tabulating various sources of benthic data by station and date for evaluation: • While there are several locations along the mainstem of the Pigeon River that are sampled for benthic macroinvertebrates, few locations are actually sampled in any one year. As a result, there are only a few years over the period of record (1983-2004) for which reasonable spatial analyses could be conducted (assuming methods provided comparable results). • There are no stations sampled on a regular basis that are immediately downstream of the paper mill discharge. The commonly sampled location (RM 57.5) is about 5 miles downstream of the discharge. While this might not create a serious impediment to evaluating plant effects and recovery over time if the spatial -temporal data set were complete and fully comparable along the length of the river, given that the data set is incomplete, an additional station proximal to the discharge would help support the objective of conducting an ecological assessment and characterizing environmental effects and possible recovery. • Much of the existing benthic data are not entered into electronic format, and the opportunity has not been provided for these results to be reviewed and entered into the Pigeon River database. River Science Panel Review Final Data that are on the electronic database suffer from taxonomic comparability problems and errors, which were encountered through efforts to tabulate community data for spatial comparisons. Although originally entered into STORET (see Tetra Tech, 2004), many instances were found of similar taxa entered with different codes, or with different levels of taxonomic detail, so that the same taxon occurred at more than one location, but did not come up in the database as being comparable across those locations. In addition, there were several errors encountered, which based on experience, can typically only be discovered and corrected through a process of data tabulation and statistical summary and review. These included a genus or species being listed under an incorrect higher taxonomic category, and the same species being listed under multiple higher categories. Selection of Data for Characterization. Benthic data availability is relatively deficient, despite seemingly regular collections made by various entities in North Carolina and Tennessee. Selection of benthic community results for evaluation was constrained by comparability of results, by limited availability of years with broad spatial distributions of results, and by the practicality of having recent results only in hard copy. The focus for evaluating benthic community indices and taxa/occurrence data was on recent results for years in which all three locations (the vicinities of RM 64.5, 57.5, and 42.5) on the mainstem Pigeon River in North Carolina above and below the paper mill were sampled in the same month. Calculated indices were compared only within a single collecting agency's results, without compiling results across collections. 3.3.2 Fish Community Characterizations Period of Record. Fish community monitoring in the Pigeon River has been conducted mainly by the TVA for the period 1988-2004. Table 3 summarizes the availability of fish species composition and abundance data and Index of Biotic Integrity (IBI) results by location along the Pigeon River mainstem. Collections were made once per year (month of collection not specified in the database). Results are available from twelve locations along the mainstem from just above the Blue Ridge Paper Mill to the mouth (at its confluence with the French Broad). The most complete temporal records for the period 1988-2004 are available from two sampling locations in the Tennessee portion of the Pigeon River, at Denton and Tannery Island (Zones "g" & "h"). Sporadic collections were made at other mainstem locations by TVA, including locations in the North Carolina above and below the Mill. There are only a few years from 1988-2004 in which spatial comparisons for the entire mainstem can be made. The most complete suite of station locations sampled synoptically within the basin was from 1995. Fish community results (metrics only) are available from NCDENR only from tributaries above the reservoir for the period 1993-2002. No fisheries data from the Pigeon River mainstem are available from NCDENR. There also is information available regarding fish re -introductions as part of the Pigeon River Recovery Project; participating agencies include TDEC, TVA, TWRA, USGS, NCWRC, BRPP, CFI, and UTK. The period of record for these re -introductions is 1996-2003. There are associated snorkel survey results for re -introduced species from 2001-2004. River Science Panel Revieiv Table 3. Availability of fish community results (species composition and abundance and IBI) from TVA in select reaches identified by zones (see Section 2) of the Pi£eon River. NC and TN. River Mile Zone Place Name Years 64.5 b 90, 95, 97, 03 63 c 95 59 d 95 55.5 d 90,.95, 97, 02 54.5 d 95 52.3 d 95 48.5 d 95 42.6 e 95, 97, 00, 03 24.9 9 95 19.3 9 90,95 16.5 (Denton) Annually 88-03 8.2 h Tanner Island Annually 88-04 Final Formal (electronic or hart! copy). Aside from fish tissue concentrations of dioxin, no fisheries data were available on the EDAS database established by Tetra Tech (2004). This was because very little biological data had been entered into a formal electronic format, mainly EPA's STORET, by the monitoring agencies, and no "informal" electronic data (e.g., in Excel files) were made available to Tetra Tech during the period of database development. During the week of the Science Panel meeting, several Excel files of fisheries results from TVA were e-mailed to Tetra Tech from EPA Region 4 for use by the Panel. As a result, most of the data listed in Table 3 could be summarized electronically. Data Quality Evaluation. Spatially comprehensive data that would be useful for evaluating effects of the paper mill and changes in those effects over time are available for a limited number of years. For the most extreme example, fish collections are available from immediately below the mill discharge (zone c) for only one year (1995). Results are available from further below the discharge, but above the reservoir (one location) for four years (see Table 3). In addition, these data represent the time period after the paper mill began significant process improvements. Data prior to 1990 are not available from locations proximal to the mill discharge. When river -wide fisheries data were available, the taxonomic and calculated community index results were comparable among stations, since all the mainstem data available were collected by the same agency (TVA). Thus, the problem of having river -wide data collected during only a few years was not as severe as for the benthic community collections, where methods differences between agencies in collection protocols and index calculations prevented direct comparisons of data collected in the NC and TN reaches of the river. However, no methods descriptions were associated with the data, no quality assurance/quality control efforts associated with entry of data into a database were performed, and the data were received "at the last minute." In addition, it should be noted that the State of North Carolina calculates its fisheries IBI index differently from the IBI index used by TVA (NCDENR, 2004). Should there be a need to evaluate NCDENR River Science Panel Review Final results from Pigeon River tributaries, comparisons to locations sampled by TVA would be problematic. Results of snorkel surveys conducted as part of the Pigeon River Recovery Project (searching for tagged re -introduced fish) are available only in hard copy. Selection of Data for Characterization. Fisheries data reviewed to characterize conditions in the Pigeon River were limited to the TVA results. Fish species and abundance data (community composition) were compared only for two years (1995 and 2003) for which river -wide collections were available. Community index (IBI) results were compared at four locations along the river (RM 64.5, 55.4, 16.5 and 8.2) for the earliest year available from these locations (1990) and a later year (1997) to characterize improvements due to upgrades in mill operations. Temporal trends in fish community metrics, which might also be expected to reflect improvements in river conditions, were reviewed for Denton and Tannery Island in Tennessee. 3.3.3 Periphyton Periphyton communities were not evaluated by the Science Panel. No periphyton data are available electronically, and no recent periphyton data are available at all, even in hard copy. The Pigeon River ecological study conducted by EA. Engineering, Science and Technology in 1987 (EA, 1988) represents the only substantial information on periphyton. Several interesting conclusions arise from the EA (1988) study, showing possible benefits to including periphyton studies in a monitoring program in this river system. But it must also be noted that this study was conducted prior to the extensive facility and process improvements implemented by the paper mill. 3.4 Dioxin and Other Toxicological Data Toxicological data available for the Pigeon River consist primarily of dioxin analyses of fish tissues. As early as 1987 the USEPA identified the characterization of dioxins in fish tissue from the Pigeon River as a priority health issue because of dioxin production associated with the bleach kraft paper pulping process. Fish accumulate dioxin, expressed either as the most toxic constituent 2,3,7,8-Tetrachlorodibenzodioxin (TCDD) or as the combination of dioxin and furan isomers as Toxic Equivalencies [TEQs] in tissues. Also, fish (rock bass, carp, and white suckers) collected from the Pigeon River (as part of the USEPA National Chemical Residues in Fish Study in 1987 and 1988) had dioxin concentrations ranging up to 75.7 parts per trillion (ppt). Although dioxin concentrations in sportfish were below the Food and Drug Administration (FDA) criterion of 25 ppt, the elevated concentrations in the bottom feeding species indicated that additional evaluations were necessary. Studies of dioxin levels in fish tissue have been ongoing since that time. Evaluations of other toxicants potentially present in fish have been conducted infrequently and in limited locations. Sampling has been conducted for dioxin and other toxicants in sediment, surface water, and groundwater, but only at a few locations and timeframes. The data available for these environmental media, therefore, are described separately below. 13 River Science Panel Review Final Period of Record. Fish tissues were initially analyzed for dioxins/furans in 1987 by the USEPA. Subsequently, fish tissues have been analyzed at least annually for dioxins/furans between 1990 and 2003. For the most part, sampling has been conducted by the two groups noted below, supplemented by studies conducted by the USEPA and the States of North Carolina and Tennessee. • Champion Paper International (now Blue Ridge Paper Products, Inc.) collected fish and analyzed tissues for dioxins/furans annually every summer (generally August) at six or more locations along the river, including two locations within Waterville Reservoir. Carolina Power and Light Company (CP&L) (now Progress Energy) collected fish and analyzed tissues for dioxins/ftirans annually every winter (November) at a minimum of two locations between 1991-2003. Prior to 2000, sampling was conducted at several locations along the river, while after 2000 sampling was limited to two stations in Waterville Reservoir. Format (electronic or hard copy). Fish tissue analytical results are presented in electronic form in the EDAS database developed for the Pigeon River by Tetra Tech (2004). Data are available in electronic format for samples collected between 1990 and 1998. Dioxin concentrations are provided in terms of the individual dioxin and furans analytical results as well as separate determinations of the TEQs for each sample. An additional electronic dataset (in Excel) was generated in support of this report, using the summary of dioxin results presented in the Blue Ridge Paper Company's (2004) report for fish tissue analyzed from 1990 to 2004. In addition to providing current levels of dioxins in fish, this dataset also provided the dioxin/furan concentrations in fish fillets of individual fish species. To be consistent with the reporting provided by Blue Ridge Paper, only the 2,3,7,8-TCDD concentrations were used to -demonstrate changes in concentrations over time. TEQ levels are available in the report, but were not entered into the electronic file. Five reports available only in hardcopy provided detailed information on the dioxin/furan concentrations in fish tissue, in addition to key sets of supporting data, such as fish species, fish length, analytical method, and laboratory quality assurance/quality control data. These reports are listed below: 1. USEPA. 1987. "Assessment of Dioxin Contamination of Water, Sediment and Fish in the Pigeon River System (A Synoptic Survey)" [December 1988] 2. Tennessee Department of Environment and Conservation "Dioxin Levels in Pigeon_ River Fish 1996 —2002" 3. Blue Ridge Paper Products Inc. 2003. "Results of 2003 Dioxin Monitoring in Fish Tissue." 4. Blue Ridge Paper Products Inc. 2004. "Results of 2004 Dioxin Monitoring in Fish Tissue." River Science Panel Review Final 5. Progress Energy (formerly Carolina Power and Light). 2003. "Dioxin and Furan Concentrations in the Axial Muscle Tissue of Fish from Waterville Lake, November 2003." Data Ouality Evaluation. The datasets available to evaluate human health risks for the Pigeon River consisted almost entirely of data on 2,3,7,8 TCDD & TCDF (dioxin & furan) in fish tissue. Although dioxins/furans are highly toxic and bioaccumulative, the lack of nearly all other types of toxicant data by default limits the data evaluation to dioxins only. This data gap is important because there are other potential sources of toxicant releases to the river, such as the W WTPs at Waynesville and Maggie and the landfill at Canton. Since WWTPs routinely monitor effluent releases, these data may be available to supplement the analyses conducted for dioxins, but were not available to the Science Panel. Based on a review of the available hardcopy reports, dioxin analyses have consistently been conducted with EPA Method 8290, although by differing labs. In a short-term review, it was not possible to determine whether QA/QC analyses have been conducted for all of the available data or whether the QA/QC analyses have identified any problems with the reported data. This type of analysis is critical to determining whether all of the data are useable in a risk assessment. However, since these data have been collected in response to regulatory requirements, it was assumed for purposes of this report that the data quality was sufficient to evaluate current conditions of dioxins in fish in the river and reservoir. The electronic dataset developed by Tetra Tech (2004) provides both dioxin/furan analyses and TEQs for fish tissue. However, no data were provided on the fish species sampled, so it was not possible to determine whether the sampling data are from sportfish or other, possibly less desirable fish. Further, without this information it is difficult to determine whether dioxins are accumulating within the foodchain (i.e., determining whether higher levels of dioxins are found in predatory fish relative to herbivores or omnivores). Additionally, it was not clear if the TEQ data reported in the electronic database were for the same fish or composites of fish as reported for the individual isomers. Further, the types of fish tissues (fillets or whole body) analyzed were not provided in electronic form. Thus, the electronic database (as downloaded from STORET) was considered incomplete because it was lacking these highly important factors that are necessary to evaluate dioxin levels in fish. Based on this determination, the Blue Ridge Paper (2004) data summary of dioxin analyses of fish tissue for 1990 to 2004 were used for this report. Almost the entire electronic dataset available for dioxins in fish tissue consists of data reported by Blue Ridge (formerly Champion Paper). However, based on a review of the "Dioxin and Furan Concentrations in the Axial Muscle Tissue of Fish from Walters Lake" (Progress Energy 2004), CP&L has apparently also collected fish on a regular basis along the river and in the reservoir. These data appear supported by detailed fish collection information, laboratory data reports, QA/QC analyses, and comparisons with data collected by Blue Ridge. These data, therefore, would be highly valuable if they were integrated into the electronic database. River Science Panel Review Final The most recent data available for dioxin concentrations in fish are only those for tissue analyses of selected bottom -feeding fish, particularly carp. Apparently, fish sampling for carp has continued because North Carolina still has a fish consumption advisory for this group of fish in the Waterville Reservoir. Sportfish analyses were halted in 2000 when North Carolina rescinded the fish consumption advisory for the Pigeon River. Also, although North Carolina and Tennessee have different criteria for establishing and/or rescinding fish consumption advisories and Tennessee criteria are lower for dioxins, recent sampling of fish has not occurred in Tennessee. This lack of data continuity, except for carp in Waterville Reservoir, also limits the analyses of toxicants in the river. As part of the 1988 USEPA study of surface water, groundwater, and sediments along the Pigeon River (as described below), fish were also collected at RM 64.5 and RM58 and analyzed for dioxins and furans with results that were consistent with those collected as part of the National Chemical Residue in Fish Study, discussed above. Groundwater and surface water sampling was conducted in 1988 at the time that dioxins were found to be health concerns in fish. Private drinking water wells were sampled because of concerns about recharge of groundwater by the Pigeon River. Samples were analyzed for dioxin/furans, polychlorinated biphenyls (PCBs), chlorinated pesticides, and selected inorganics. Water in the river was sampled at RM 39, 40, 41.25, 41.5, 42, 45.5, and 64.5. Ten drinking water wells were sampled in the vicinity of Hartford, TN. Results of these analyses found: • No dioxins/furans were detected in drinking water. • No other organics were detected in drinking water. • Dioxins/furans were not detected in river or reservoir surface water. • Chloroform was detected in the river water above the reservoir, in reservoir water, and below the reservoir near Hartford, TN, with a maximum concentration of 2 µg/l in reservoir water. • Trace metal concentrations indicated no apparent environmental concern (USEPA, 1988). Sediments were also sampled along four transects in the reservoir. Results of these analyses found: • Dioxin was detected in sediments with estimated concentrations of 0.34 to 0.64 ppt near the dam and at a measurable concentration of 13 ppt at the upper part of the reservoir where the river enters the reservoir. • The only measurable concentration of dioxin in sediments was found at this upper portion of the reservoir. • No pesticides, PCBs, and only trace levels of toluene were detected in sediments. 16 River Science Panel Revieiv Final Selection of Data for Characterization. The data reported by Blue Ridge Paper were selected for characterization of the Pigeon River dioxin analyses of fish tissue in this report because: • Data reported for individual fish species were available in electronic (Excel) format. • Sampling stations are located along much of the river proximal to the station groupings established by the Science Panel for evaluation of the mainstem of the Pigeon River (i.e., in groups b, d, reservoir, g, and h; or above the paper plant, below the paper plant, two stations within the reservoir, and two groups below Walters Dam). • This dataset included the most recent analyses of fish tissue (i.e., analysis of fish tissue through 2004). • Based on comparison of dioxin results presented by Progress Energy, TCDD analyses conducted by Blue Ridge (2004) of the same fish species collected in Waterville Reservoir appear to be generally similar to those reported by Blue Ridge Paper. For example, the mean concentrations of 2,3,7,8-TCDD reported for common carp in Waterville Reservoir between 1997 to 2003 by Blue Ridge Paper and Progress Energy ranged from 2.6 to 7.7 picogram/gram (pg/g) and 2.3 to 5.2 pg/g, respectively. It should be recognized that a statistical analysis comparing these two datasets was not possible and there may be other factors, such as fish length, age, or overall health that could affect the data analyzed for this report. 4.0 Characterization of Environmental Condition 4.1 Water Quality Analysis/Evaluation Major changes in water quality conditions occurred following the renovation to an improved pulping process between 1990 and 1994. Significant changes in water quality variables including color and total dissolved solids (TDS) were observed in years following the improvements (Figures 3 & 4). Total Suspended Solids (TSS) concentrations below the effluent outfall declined to resemble upstream reference conditions following 1993 (Figure 5). These improvements to water quality directly addressed beneficial uses for surface waters in North Carolina and Tennessee like recreational contact and protection of aquatic life. Water quality can be characterized within three major areas of the river in North Carolina: above the town of Canton (above the effluent outfall), below the effluent outfall to the mouth of the reservoir, and the bypass reach (absent of any flow from the Pigeon River). There are several streams tributary to the Pigeon River in each of these areas that have a minor influence on water quality in the areas above Waterville Lake. The changes in water quality are dominated by the mill effluent characteristics in the middle area of the drainage while the bypass reach is supplied with flow from tributary streams and groundwater (although groundwater studies are lacking in this area). The tributaries contributing the majority of the flow to the bypass reach have a major influence on water quality characteristics. This area is absent from the effects of the pulp mill effluent releases. River Science Panel Review Final Several drought years were embedded within the period of record analyzed in this review. The drought years included 1998 through 2002 where stream flows were continuously below medians calculated from historical United States Geological Service (USGS) monitoring records (Figure 6), Persistent low flows can reduce the area of useable habitat by fish species and act as a concentrating factor for several of the chemical analytes. Both conditions increase the risk of exposure in fish and benthic macroinvertebrate communities to contaminants entrained in sediment and water. Increases in ammonia (NH3-N) concentrations and total dissolved solids (TDS) occurred during the drought years 1998-2002 in the Pigeon River below the effluent discharge point (Figures 7 and 4). Concentrations of total nitrogen (TN) and total phosphorus (TP) at Zone "e", at the head of Waterville Lake were double those recorded from Pigeon River above the town of Canton (Figures 8 and 9). These concentrations are likely the result of increased relative contribution of effluent content in the river during drought conditions. However, both TN and TP remain at lower, constant post-1994 concentrations at the monitoring point near the head of Waterville Lake. Current ammonia concentrations (2004) at RM 41.5 (prior to Laurel Branch) in Waterville Lake are eight times higher than those measured in 2001 at the last river site in Pigeon River before entering the lake (EA, 2004). It appears that this area of Waterville Lake receives a large load of depositional material and may have high rates of organic decomposition. Organic loads may originate from aquatic macrophyte beds (Zone "d"), which may form broken mats that are deposited in the upper shallow lake area. The macrophyte bed growth may be influenced by a combination of mill effluent organics and those concentrations originating from tributaries upstream of this section. Organic concentrations originating from mill effluent are twice the concentration as that found upstream of the effluent outfall in Canton. Non -point sources of pollution from the tributaries are likely contributors to the nutrient concentrations reaching the macrophyte beds. An oxygen demand in sediments, resulting in a reducing environment, may promote the higher concentrations of ammonia -nitrogen observed in this portion of the lake. This may explain the increase in ammonia concentration that is several times higher than in upstream Zone "e". Dissolved oxygen concentrations are slightly lower below the effluent outfall in Zone "d" and at the head of the reservoir (Zone "e") (Figure 10). On average, dissolved oxygen concentrations are 1 mg/L lower at stations below the mill effluent outfall. However, the variation in dissolved oxygen concentrations is greater at these sites and may result in periodic risks to aquatic life. The unknown risks are the duration of dissolved oxygen sags and the time of year they occur as extreme conditions. Dissolved oxygen concentrations also increased during the drought years in the by-pass reach (below Walters Dam). Drought conditions are characterized by low water levels in the channel, exposure to increased radiant heat (degree days), and greater nutrient availability. This may have stimulated photosynthetic activity and an increase in dissolved oxygen concentrations throughout the bypassed reach. It should be noted that drought years are also characterized by reduced runoff, which tends to reduce non -point source inputs of nutrients. In some locales along,the 18 River Science Panel Revieiv Final river, this may also play a role. Diel measurements of dissolved oxygen concentrations would identify drought condition effects by characterizing fluctuations in this indicator. "Color" measurements in the river downstream of the mill and upstream of the reservoir did not change before or during the drought years (Figure 3). It appears the treatment of mill effluents for this water quality characteristic, despite hydrologic variation, has been successful. Color of the river has changed dramatically from 1988 to the present where measurements have remained routinely constant and within discharge permit guidelines at various stages of the hydrograph. Water quality conditions are affected by concentrations of pollutants when in a reducing environment. Liberation of contaminants adsorbed to fine sediments occurs when pH declines as a result of oxygen, depletion from decaying organics or other processes. 4.2 Biological Analysis/Evaluation 4.2.1 Benthic Macroinvertebrates Relatively recent (2001) benthic data collected by CP&L show a decline in number of sensitive Ephemeroptera-Plecoptera-Trichoptera (mayflies-stoneflies-caddisflies, EPT) taxa below the mill (RM 42.5) compared to upstream (RM 64.5), with recovery downstream in the bypass portion of the river (Figure 11). Data from NCDENR in 2002 shows a more substantial decline in EPT taxa below the mill (RM 57.5, Zone "d") compared to upstream (RN 64.5, Zone "b"), with only a partial recovery near the reservoir (RM 41.5, Zone "e") (Figure 12). This evidence shows that the benthic community is responding to stressors in the reach between the paper mill discharge and the reservoir. Contributors to such stress could include the paper mill discharge, erosion and non -point source runoff of nutrients from pastures that border the river in this reach, inputs from the Waynesville WWTP via Richland Creek, and various possible habitat differences. Characterization of this pattern must be tempered with consideration of temporal patterns, and of confounding spatial influences of habitat condition. Although effects on the benthic community remain apparent in the data, over time, there has been noticeable improvement in condition. Figure 13 shows the number of EPT taxa downstream of the mill near RM 57.5 (Zone "d") from 1983-2002. Between the mid- to late 1980s and the early to mid-1990s, there was a noticeable increase in EPT taxa (although no data are available for the 1990-91 period, when improvements in mill operations were initiated). This suggests that historic effects of the mill discharge on benthic communities have been ameliorated to some degree following improvements in mill operating conditions. Another trend in these results is that in the most recent years, 1999 and 2002, there again are declines in EPT taxa. These are drought years (see Figure 6 showing annual average flow at the USGS gage located at RM 45.1), and it is possible that the substantially reduced river flows may have negatively impacted the benthic communities. This could occur through reduced availability of habitat due to low flows, or possibly through other associated changes, such as in nutrient concentrations, productivity and food availability, conductivity, and/or other water River Science Panel Review Final quality characteristics. Thus temporal patterns of improvement are confounded by temporal variation in other environmental conditions, such as stream flow. Benthic habitat characteristics also are expected to influence spatial differences in benthic species composition and abundance. For example, gradient of the river changes along the mainstem, with the upstream reference areas (Zones a and b) and the downstream reach in Tennessee (Zones g and h) at a higher gradient (about -4 to -6 feet/mile, see Table 4) than the area below the mill discharge and above the reservoir (Zones c and d, from -1 to about -4 feet/mile). Other variations benthic habitat conditions may also exist. At least a portion of the area downstream of the mill defined as Zone d apparently has less abundant riffle habitat, more unconsolidated bottom sediments, and in some areas, more bedrock than river reaches just upstream of the mill discharge and reaches downstream of the reservoir (EA, 2004). NCDENR (2003) describes a portion of this reach as having reduced riffle habitats and prolific weed growth. In addition, Richland Creek joins the mainstem near the beginning of this section (about RM 55); flow from this creek includes discharge from the Waynesville WWTP. It appears that the reach defined as Zone d, which is usually the only location downstream of the mill discharge sampled for benthos,, may have substantial differences in benthic habitat conditions compared to the upstream reference area. Habitat characteristics are not consistently characterized (even in a semi -quantitative manner) and reported. Thus, it is not possible with existing data to partition possible ongoing or varying mill effects from such habitat influences. In the same vein, similarities seen between benthic community characteristics at the location upstream of the paper mill outfall and within the bypass reach (CP&L results referenced above) may be related to habitat similarities, e.g., a return to higher -gradient stream conditions and more abundant riffle habitat, or may reflect lower concentration of pollutants. A reliable conclusion regarding any persistent effect on benthic communities in the reach below the mill or the expected extent of recovery cannot be made. Table 4. Average changes in elevation (feet per mile) for defined zones within the mainstem Pigeon River, NC and TN. Zone River Miles Gradient A 69-66 -5.33 B 66-65 -5.0 ' C 62-60 -4.0 D 59-45 -1.07 E 43-41.5 n/a F 39-26 -19.9 - G 26-14 -6.33 H 1 9-7 -4.5 4.2.2 Fish Community Characterizations As was found for the benthic community, recent fish community status based on the Index of Biotic Integrity (IBI) shows a depression below the paper mill discharge (see Figure 14 for 1997). Community "integrity" goes from good at the upstream reference and downstream locations, to fair at RM 55.4, about 9 miles downstream of the discharge. Similar results from River Science Panel Review Final 1990, shown in the same graph, indicate that at that time, before plant improvements were implemented, fish community integrity below the paper mill was very poor, and continued to be poor throughout the remainder of the river. This suggests that conditions for the fish community had improved substantially by 1997, an expectation consistent with the fact that the paper mill implemented several process changes and treatment improvements over the period 1990-94. The comparison also suggests that by 1997, the downstream extent of mill discharge effects on fishes had diminished compared to that observed in 1990. Examination of spatial trends in number of native fish species (as another available community metric) in 1995, when 11 locations along the mainstem of the river were sampled for fish synoptically, shows a similar decline immediately below the paper mill discharge at RM 63 (Figure 15). While there is some variation, this fish metric remains lower than the upstream reference through RM 24.9, below the bypass. Downstream of this location, at three locations sampled in the Tennessee portion of the river, the number of native species is much higher than at the reference site upstream of the paper mill. This suggests probable fish community differences between the downstream (Tennessee) and upstream reference locations that may not be captured in the IBI. For example, green darters appear to occur upstream but not downstream, while the gizzard shad are abundant at the downstream stations, but not upstream (see Table 5, showing species abundances by station for 1995 and 2003). It might be beneficial to evaluate fish community similarities between stations using a multivariate approach such as cluster analysis, to understand whether there are gradients in community composition that may be responding to habitat gradients. Remembering that the study area from upstream of the paper mill in North Carolina to the mouth of the Pigeon River in Tennessee extends over two main physiographic provinces (the Blue Ridge and the Ridge and Valley, changing at about RM 17), and has progressive influences from watershed drainages and tributary inputs, such a gradient in community composition would be expected, and would impact expectations for community composition in the reach of the river between the mill and the reservoir. As was discussed for the benthic community evaluation, it can be difficult to define expected community composition in the absence of the paper mill impacts, how much recovery could be expected as those impacts are reduced, and to partition the influence of other existing habitat conditions, including other impacts such as sewage treatment discharges or agricultural runoff. Temporal trends in fish IBIS at the most downstream locations sampled (Denton and Tannery Island, TN, RM 16.5 and 8.2, respectively) support the evidence for positive fish community responses to improvements in the paper mill operations. Figure 16 shows a notable increase in community condition between the 1988-90 period, prior to mill modernization, and the 1994- 2003 period. As discussed previously, there are substantial variations in the fish IBIS within the 1994-2003 period that may reflect diverse environmental and habitat influences, possibly including drought effects (see for example, the results for 1999). 21 River Science Panel Review Final Table 5. Species composition and abundance of fishes at various sampling locations along the Pigeon River, NC and TN, 1995 and 2003. Sum of Individuals Year MILE OT 1995 64.5 63 59155.5'. 54.5 52.3 48.2 42.6 24.9 19.3 8.2 1995 Total 2003 20M Total Grand Total SCIENTIFIC_NAME COMMON NAME 64.SC 55.5:. 42.61 16.5 8.2 AtnblO liter ru eshis Rock bass 78 13 81 3! 6 3 1 8 2 122 671 2: :- 53 18 140 262 Antialoplites witestris<5 in. ROrk bass <5 in. I 1 1 1 1. 1 1 Ameums brunneus Snail bullhead 1: 1 11 1 t 1 1 Ameums naiads Yellowbrllhead I. I 11. 1 1 2 2 Ameumanebl4osus Bro'.vnbullhead 1 I 1 71 7 7 Aplodinotus grunniens Freshwater dmm 1 1 2 1 3 I. 1 4 2 6 9 Camposloma anomalum Central sloneroller 30 1 831 174 7 68 40 3 249 1991 111 1210 459 Camposloma oligolepis LaMescale stoneroller I 1 e 147 67 222 I 1 1 104 153 257 479 Carassius aumtus Goldfish 2 31 19. 11 4 39 1 1 39 Caralodes mroo River-carpsuaer i I 1 1 1 { i 3 3 4 Ca odes cyprnus lQuillibeck 1 I I 1 L I t I I Catostomus ammersoni White sucker I 4 6 12 4 1 24 31 1 3 27 Conn. baildi Mottled sculpim 33 1 1 33 151 1 15 a Callus carolinae Banded scut in I 1 63 69 31 163 1 1 33 49 82 245 C tinella galactura Whilstail shiner B 2 161 35, 15 16 22 3 53 32 53 256 1611 10 61 155 346 678 934 Gypninellas ilo tera $ otlin shiner I 1 2 2 L 1 1 4 246 250 252 CPR=mmio comlrron carp 6 141 20 17 16 13 17 103 1 It W- 1 9 16 119 Dorosoma cepedianum Ginald shall 1 1 23 156 90 269 1 1 ' 83 120 203 472 Etheastoma blennloides Greenslade darter 41 1 1 1 29 44 10 125 281 11 + 38 149 216 341 E8leostoma chlorobranNlum Greenish tlaner 63 1 11 64 1821 1 182 266 Etheostpma Mllneatum Redline darter I 1 1 31 414 446 1 1 1 190 885 ION 1530 Etheostoma simoterum Snubnose darter 1 1 21 13 34 I 1 1 27 41 68 102 Etheostoma zonate BaMeddarter i I I. 1 t 1 1 1 Hyland le orris sips. Hybrid sunfish 1 I 1 1 6 1 9 1 1 1 1 10 Hypentelium nigncans NoMem hag sucker 37 18 671 50; 58 49 54 74 19 137 42 605 91 B: 225 33 52 124 729 Ir31th om on bdellium ONO larrioney I 1 1 1 I i I 1 1 Iclanyonny,on castandus Chestruftlaunpray I I I 1 12 3 5 5 Iclalums punctatus Channel catfish _ I 1 4 4 1 3. 22' 2. 5 32 36 Idineus bubalus Boni buffalo 1 1 3 16 19 1 1 3 13 16 35 Imobusnier Blaabullalo I 1 1 1 1 1 4 4 5 Lepamis auntus Redbreast sunfish 29 77 1191 IV, 132 177 112 18 5 12 26 899 1741 47, 25. 26 39 311 1210 Leomis ryanellus Green sunfish 13 71 21 6 1 9 38 21 11 11 3 7 45 Le orris gulosus Warmouth 11 I 1 t. I 1 Lepomis ma=nInus Sluegll 11 3'' 4 1 33 6 1 5 54 11 1 2' 3 15 21 75 Lucius camogenis Warsainlshiner 32 61 1 38 2101 2, 5 217 255 Micaptelus dolomleu Smallmauth bass - 3 2 31 Z 3 11 1 40 24 11 100 71 11 111. 73 9 lot 201 cro Mitents undUatus S fled bass 1 1 3 1 8 12 1 1 5 2 71 19 Micro lerus salmoides Largemouth bass 2 2 11 41 11 8 3 14 2 47 11 2 3'' 3 9 56 Moronechrysops Whits bass 1 1 3 3 1 J 1 3 Momstoma anisurum Silverredhotse I 1 1 1 L I 1 1' 4 5 6 Momstoma cadnatum Riverremlorse I I. I 1 1 2 2 4 4 Momstoma du uesnel Black redhorse 8 5 t 1 2 1 1 ] 24 37 1 22I 15 10 86 115 Mcutostorna endinnurund Golden redhorse 1 1 10 10 1 1 1 8 8 18 Noamis micro ogon Rivercdub 147 3 23l 11 3 177 1031 Z 1B; 123 300 Notemigonus crysoleums Golden shiner I: 11 1 1 I 1 1 hl.00Iai. amblo s Miefremul, 1 1 1 4 51 1 1 1 51 8 57 62 Nobolois photogenis Silvershiner 1 1 6 15 21 1 1 30 127 157 176 Noocpis robeflus Rosyfaw shiner 1 I I I 1 4 122 126 126 Nonopis rubri omus Saffron shiner 3 1 1 3 171 1 1 17 26 Notro iss ectrunculus Mihorshiner Its 1 t 18 341 1 1 1 3a 52 NobO is alescous Telescope shiner t 1 3 3 1 1 76 9 85 BB Oncoth ntllusm kiss RainboWboul C 1 3 3 6 1 1 6 Percina auranliam Tangenne darter 28 1 1 1 29 41 1 t 4 33 Peroina caprodes LO perrll 1 1 27 41 79 147 1 1 1 3 30 33 180 Petcua eMdes Gilldarter t I I 1 i 5 5 5 Fornephales pronnelas FaOead minnow I. I f 1 1 1 1 1 Pomozs annulads While Mrsid. I I I I I 1 :B 2 10 10 Pornams nigromaculatus Black onappl. 11 9; 30 11 6 2 59 I 3: 3! 6 65 Pylodtlisolivads F1aNead camsh I I 1 1 t{ 1 2 6 RNnitldhys abatulus Blacknose dam I I 1=1MM 1 i I 1 Rhunaths mdannAm Longnose dace 11 11 1 19 1 1 1 1 1 20 Salmo bona Brown Iroul 2 1 1 d943 3 11 1 1 1 4 Sszostedion anadense Sauget 1 1 2 1 I I 1. 1 3 Stizastedion vitreum walleye I 1 3 1 1 1 1, 4 5 8 Grand Total 504 144 354[ 3621 308 377 4544 1259L lull 146i1042 ZbUZI buoul 9594 River Science Panel Review Final A target list of species expected to occur in Tennessee was developed (Charles F. Saylor, personal communication, 2005) to help provide a basis for expectations of community recovery and effectiveness of re -introduction programs. Table 6 provides that list, showing fish species that have occurred since 1988, before improvements to the paper mill were implemented; species that have only occurred since 1991, after those mill improvements were initiated; and species that should occur, but have not yet been observed. This summary suggests that there has been natural re-establishment of native fish species from surrounding source populations. The progressive increase in native fish species at Denton and Tannery Island, TN from 1988 through 2003 (Figure 17) supports this, although it must be noted that since 1996, species recovery has been augmented by artificial re -introductions of native species, transferred from nearby river basins as part of the Pigeon River Recovey Project. Between the 1988-91 period and the 1994- 2003 period, there has been an increase on the average of 10 native species (from 15 to 25) at Denton, and of 16 species (from 17 to 33) at Tannery Island. These observations suggest there is substantial improvement in ecological condition of the lower Pigeon River, supporting both natural and artificial re -introductions of fish species, with the potential for continued recovery. 4.3 Dioxin Evaluation (Human Health Risk) Following modernization of the mill, dioxin concentrations in all fish species sampled over several years decreased substantially, as can be observed in both sportfish and bottom feeding fish samples collected from 1992 to 2000 (see Figures 18 to 27). Based on these data, in 2000, the State of North Carolina rescinded the fish consumption advisory for sportfish in the Pigeon River and Waterville Reservoir. Sampling continued thereafter for only bottom feeding fish. Thus, the most complete dataset for dioxins in fish tissue is for bottom feeding fish collected from 1990 to 2004. Prior to 1990, fish consumption advisories were issued by the States of North Carolina and Tennessee. These advisories recommended no consumption of fish from the Pigeon River or Waterville Lake. The criteria used to establish the fish consumption advisories were as follows: North Carolina • Dioxin concentrations below 5 ppt = no advisory • Dioxin concentrations between 5 and 10 ppt = no consumption by pregnant women and children and no more than 1.2 pounds per month for others • Dioxin concentrations between 10 and 20 ppt = Limit consumption to 0.5 pound per month • Dioxin concentrations about 20 ppt = no consumption recommended Based on these criteria and dioxin concentrations observed in fish in 1988, North Carolina recommended that no fish be consumed from the Pigeon River or the Waterville reservoir. Tennessee Based on a posting criterion of 5 ppt, in April 1989, the State of Tennessee issued a "do not consume" advisory for all fish in the Pigeon River (TDEC 2002) from the Walters Dam (state border) to the French Broad River. River Science Panel Review Table 6. Target list of fish species expected to occur in the Pigeon River, TN. STATUS OF FISH SPECIES OCCURRENCE IN THE PIGEON RIVER, TENNESSEE name Scientific name Occur 1988- Present Occur my >1991 Should Ohio lam rey Ichthyomyzon bdellium XChestnut lamprey Ichthyomyzonwstneus X jMayHavoCommon Am brook lamprey Lampetra appendix Lake sturgeon Acl enser tulvescens Paddlefish Polyodon spathula Spotted gar Le isosteus occulatus X Longnose gar Lepisosteus osseus X Moone a Hiodon tergisus Gizzard shad Oarosoma cepedianum X Threadfin shad Oorosoma petenense X Central stoneroller Campostoma anomalum X Goldfish Carassius auratus x Whitetail shiner Cyprinella galactura X Spotfin chub. Cy rinella monarha x Spatfin shiner Cy rinella sp8optera X Common carp Cyprinus carpio X Blotched chub Erimystax insignia x Striped shiner Luxilus chrysocephalus x Warpaint shiner Luxilus wccogenis x Golden shiner Notenugonus crysoluews X River chub Nocontis micropogon x Bigeye chub Notropis ambleps X Tennessee shiner Nortopis leuciodus X Silver shiner Notropis photagenis x Rosyface shiner Notropis rubellus X Saffron shiner Notropis rubric oceus x Sand shiner Notropis stramineus x Minarshiner Notropis spectrunculus X Telescope shiner Notropis telescopus _ X Mimic shiner Notropis volucellus X Bullhead minnow Pimephales vigtlax x Faflips minnow Phenawbius crassilabmm x Stargazing minnow Phenawbius uranops X Blacknose dace Rhinichthys atratulus X Longnose dace Rhinichthys cataractae X River Carpsucker Ca lodes carpio X Quillback Carpiodes cyprinus X r Highfin carpsucker Carplodes velifer X White sucker Catostomus commersoni X Blue sucker cyceptus elon atus X Northern hog sucker Hypentelium nigricans x Smallmouth buffalo Icbobus bubalus X Black buffalo Ictiobus niger X Silver redhorse Moxosloma anisurum X River redhorse Moxestama carinatum x Black redhorse MOXoStOma duquesnei X Golden redhorse Moxostoma erythrurum x Shorthead redhorse Moxastoma macrolepidotum X Yellow bullhead Amelunus natalis X Brown bullhead Ameiurus nebulosus X Channel catfish Ictalurus punctatus X Mountain madtom Noturus eleutheros X Flathead cefsh Pylodlcfis olivaris X Northern studfish Fundulus catenatus X Muskellunge Esox masquinongy X Rainbow trout Onwrhynchus mykiss X Banded sculpin Coitus carclinae X White bass Morone chrysops X Rock bass Ambloplites rupeshis X Redbreast sunfish Le orris auritus x Green sunfish Lepomis ryanellus x Wannouth Lepomis gulosus X Bluegill Le arms macrochirus x Smallmouth bass Microptems dolomieu X S otted bass Microptems pundulatus X Lergertwuth bass Micro leis salmoides X White crap le Pomoxis annulans 1 X Final River Science Panel Review Final Following the modernization of the paper production process, dioxin concentrations in river fish tissue dropped substantially (see Figures 20 to 23, 25 and 27). In 1996, Tennessee downgraded the consumption advisory to a "precautionary advisory" for only three fish species (redbreast sunfish, carp, and catfish) because of reduced dioxin concentrations. By 2002, dioxin concentrations in both game and rough fish in the Tennessee portion of the Pigeon River dropped to levels consistently below 1 ppt (see Figure 27), except for catfish, which were reportedly (TDEC 2002) consistently below 2 ppt. Based on these observations, the fish in the Pigeon River were considered safe to eat at normal consumption rates. This was considered by the State of Tennessee (TDEC 2002) to be consistent with the dropping of fish consumption prohibitions in the North Carolina portions of the river in 2001. Essentially, the reduction in dioxin/furan concentrations in fish resulted in the dropping of fish consumption advisories for all species in the river. Concentrations of dioxin/ftran generally continued to decline in tissues from fish collected both above and below stream reaches surrounding the pulp mill outfall. A slight increase in dioxin concentrations in sportfish, such as redbreast sunfish and black crappie, was observed in the timeframe of 1998 to 2000. Generally the same level of increase occurred in TCDD concentrations in several different species of fish collected at river mile 52.3 and 59 (RM52.3 and RM59) downstream of the outfall and at river mile 64.5 (RM64.5) above the outfall (see Figures 18 to 22). Sportfish sampling was halted in 2000, thus it is not possible to determine concentration trends in this group of fish after 2000. Nevertheless, analyses are available for bottom feeders, such as common carp, collected at some of the same sample locations as those where sportfish were collected. These data also show an increase in dioxins in the pre-2000 years, followed by a decrease after 2000 (see Figures 21 and 27). These data suggest that dioxin concentrations may also have decreased in sportfish and some other factor, such as the drought that occurred at about this time, may have affected all fish in the river Currently the only fish consumption advisory is for carp in the Waterville Lake. Dioxin concentrations in carp have remained relatively stable over the past decade (see Figures 23 and 25). 4.4 Fish Criteria Relative to Current Toxicity Evaluations The USEPA is reassessing dioxin toxicity. Although not yet published in -final form, the State of Tennessee (TDEC 2002) is evaluating the potential impacts on fish posting criteria. The re- evaluated posting criterion for dioxin has been computed to be 1.2 ppt. However, until the USEPA reassessment is complete, the legal requirement remains at 5 ppt. To put this criterion into perspective, Table 7, below, shows the fish tissue concentrations that would be acceptable using the protocol established by the USEPA (1999) for "Establishing Fish Consumption Advisories." Using standard default assumptions[ for fish consumption rates, including an average fish meal size of 8 ounces (0.227 kg), a target risk of 10-5, and a cancer Other assumptions included in the calculations include an adult body weight of 70 kg, a time -averaging period of 1 month, and a 70-year lifetime. River Science Panel Review Final slope factor of 1.56 x 105 per mg/kg/day, the following range of fish tissue concentrations could be consumed, depending on the number of meals consumed per month. Table 7. Acceptable fish tissue concentrations Fish Meals per Month Dioxin TEQ Concentration t 8 >0.052 — 0.077 4 >0.077 - 0.15 2 >0.21— 0.31 1 0.31 — 0.62 Based on these analyses, the posting or rescinding of fish consumption advisories are consistent with current approaches to evaluating fish consumption and assuming fish from the Pigeon River are consumed for approximately one meal per month. That is, available data show that dioxins in sportfish remained lower than criteria (for one fish meal per month) identified as potential health concerns for about 5 years prior to lifting of the fish consumption advisories. Also, based on recent data (Blue Ridge 2004), bottom feeding fish such as channel catfish and flathead catfish are also below potential levels of concern, while common carp exceed these levels of potential health concern. Of note, however, is that after the substantial decrease of dioxin concentrations in fish in the early to mid-1990s, dioxin concentrations in common carp have retrained within the same relative range (see Figures 2 and 3). This pattern is particularly striking for fish collected at the upper end of the reservoir (i.e., RM 41.5) (Figure 3). Altogether, these evaluations demonstrate that modernization of the paper production process at the Blue Ridge Paper facility at Canton has resulted in substantial reduction in the amount of dioxin available for accumulation by fish in the Pigeon River. Since dioxin is known to sorb to particulates, the most likely source of dioxins that remain in the system are those sorbed to sediments deposited either in the river or reservoir prior to the plant modifications. Dioxin can persist in the environment for decades (WHO 1997). Based on the fish tissue analyses, it also appears that the main location where dioxins in sediments are accessible to fish are those deposited near the dam of the reservoir (RM 39). Further, since dioxin has remained at relatively steady state concentrations in common carp sampled at this location and the other station (RM 41.5) in the reservoir over the past 10 years, there appears to be a persistent source of exposure to dioxin -associated sediments in the reservoir. Understanding of the dynamics of sediment deposition and re -suspension in the reservoir is therefore key to determining the potential long-term health risks associated with dioxins that were released to the Pigeon River. Key Questions: Are the dioxins "capped" (entombed) in sediments or are they periodically or frequently contacted by target species like carp? • Over the past ten years dioxin concentrations have not changed dramatically in carp in the reservoir, although the same size fish have generally been sampled. This suggests that fish are exposed to a renewed source of dioxins, at least at low levels, on a regular basis. River Science Panel Review Final • Does reservoir turn -over or other water circulatory processes contribute to sediment - associated dioxin re -suspension? 2. What is unique about Waterville reservoir, where dioxin concentrations remain at higher concentrations in carp than at upstream locations? Is this the only depositional area where sediments remain with accessible dioxins? 3. Is there a relationship of dioxin concentrations in fish with those in sediments? • Is there habitat -specific mediation of contaminant accumulation in fish (e.g., do common carp "consume" sediments as part of their feeding behavior)? • Are carp attracted to areas where there is deposition of detrital material from the upper reaches of the river and thereby contact disturbed sediments that contain dioxins? • Are there other fate or chemical partitioning aspects that could explain sediment -fish dynamics and the transfer of dioxins from sediments to fish or other biota? 4. Are there correlations between dioxin concentrations and major disturbances (e.g., large- scale climatic events, such as hurricanes)? For example, low flow in the river (based on annual monitoring plots) may have affected dioxin concentrations in 2000 to 2002 because of drought conditions. 4.5 Integration of "Key" Observations 1. Biological responses to the paper mill discharge are still evident within the benthic and fisheries communities, although substantial improvements over time are evident. Spatially synoptic biological collections, uniformity of methods, and quantitative habitat sampling would support more accurate interpretation of the major stressors, and of expectations for further improvement. 2. The Pigeon River has two significant "biological zones", upstream of Walters Dam and the remainder of the river below the dam that includes the bypass reach and reach where Pigeon River water is reintroduced back to the main channel (below the powerhouse). Elevation and geographical isolation by the dam emphasize the influence these factors have on biological communities (McKinney, personal communication). Reference comparisons should consider these two zones when evaluating biological information generated in future projects or monitoring programs. Also, transition from the "Blue Ridge Mountains" to the "Tennessee Ridge and Valley", the powerhouse at about RM17.0, may present some influence on ordering of biological communities. . 3. Common carp collected from the reservoir have the highest concentration of dioxin in fish tissue. Carp are omnivorous and consume both plant and animal material that settles out where the river meets the reservoir. The convergence of two conditions: 1) settling zone for organics, and 2) depositional zone for historic dioxin loads and continuing residence may promote higher risk of contaminant exposure in the carp population. In addition, entrainment of dioxin or other contaminants in detrital material from upstream sources may be consumed by carp at locations within the reservoir. 27 River Science Panel Review Final 4. Re -distribution of suspended organic materials is mediated by flow. The fate of depositional materials and of contaminated sediments is transient depending on characteristics of the hydrologic year. Migratory behavior of certain fishes will reflect the distribution of contaminated sediments and eventual risk to their survival throughout the life stages. 5.0 Recommendations The Science Panel pursued the objective of assessing the current status of the Pigeon River system, given the limitations of existing ecological information on the river system. This process led to some perception of the deficits in scope of existing information, relative to the main issues that pertain to this river system. As the logical adjunct to this, the Panel has formulated recommendations intended to address some of these deficits. In general, the Panel recognizes strong justification for specific continued monitoring, for additional directed efforts to improve and centralize the Pigeon River database, and for studies that would support more comprehensive ecological and human exposure risk assessments, including sediment transport modeling and some additional field studies. 5.1 Future Monitoring Efforts • Discharge Monitoring Report (DMR) information would be helpful for determining nutrient concentrations likely to reach the Pigeon River. • Flow monitoring at several locations along the reach below the effluent outfall are necessary. Flow levels mediate the timing and severity of water pollution conditions. Suspended materials are released from the water column at locations downstream when flows are higher. High flows may reduce the concentration of toxic contaminants and risk of exposure to biota. At present, there are active USGS gages "near Canton" ("at Canton", RM 64.1, was discontinued in 1984), near Hepco (RM 45.1), near Waterville, and at Newport (RM 7.8). Effects of flow on water quality condition was not examined in this evaluation primarily due to time constraints. A more thorough evaluation of water quality at different hydrologic stages may be possible with existing data. • It is recommended that periodic synoptic benthic surveys be conducted, to include the river from immediately upstream of the paper mill outfall to Tennessee. Sampling should include the river immediately below the mill discharge, and should reflect habitat types longitudinally. Methods should be uniform, quantitative, and documented. It is suggested that consideration be given to adopting the EMAP Wadeable Streams protocols. Continued but refined examination of the benthic macroinvertebrate community has value in the context of the Pigeon River system for several reasons. — Due to their variety of life habits, close association with the substrate as well as the water column, and relatively long life cycles, benthic community conditions integrate multiple lines of evidence for identifying pollution source and effects. — Benthic community status provides a direct measurement of in -stream effects from pollution sources and/or habitat degradation (disturbance). River Science Panel Review Final — Further evaluation of critical biological communities will be valuable in identification the range of existing system stressors, including non -point sources of pollution from tributaries. All future monitoring of biological communities should be conducted within the framework of a cooperative monitoring program. An integrated program could be beneficial in three ways: greater spatial coverage of aquatic resource conditions, cost savings, and ability to address multiple objectives that would be beneficial to government agencies and regulated businesses. The historical data was generated by multiple monitoring efforts and addressed specific objectives. The data produced could have been more useful had additional site locations been established or multiple monitoring efforts combined to enable isolation of known pollution sources. The drawback for establishing a monitoring consortium is an administrative process that slows progress in decision -making. This is outweighed by the long-term benefit of having comparable data that can be used to measure spatial extent of pollution effects and trends at key locations in the drainage. A comprehensive or cooperative monitoring program should incorporate a hierarchical design that addresses multiple objectives. Small spatial scale questions can be answered with a monitoring strategy that generates data using a near -field design and adjusting sampling intensity based on response characteristics of the pollutant or variable of concern. If the focus is characterization of bacteriological contamination, frequent collection of samples is recommended at each site in order to adequately describe the variability inherent in this type of data. Other variables like TSS (total suspended solids) are more conservative and not biologically interactive and, therefore, result in repeated measures that do not vary broadly, except when an obvious source for degradation is identified. • Additional monitoring effort is necessary at the mouth of major tributaries along the Pigeon River. The period of record for single tributary sites is sufficiently short that pollution type and intensity is not easily identified. Also, the effects on pollution characteristics at various stages of the hydrograph are not apparent. • Continuous monitoring of dissolved oxygen concentrations, as well as temperature and conductivity, should occur below the pulp mill effluent outfall, immediately above the Waterville Reservoir on the Pigeon River, and at the base of the bypassed reach. Diel variation in dissolved oxygen concentrations should be measured to determine the duration and severity of dissolved oxygen depression and effects to aquatic communities. This would enable identification of source for dissolved oxygen alteration (human & natural) at these critical points along the drainage. • A 5-year review process is recommended to confirm that dioxin levels in sportfish remain below levels of health concern throughout the river system. • Bottom feeding fish sampling in the lake could also be reduced to a 5-year sampling frequency since concentrations have remained relatively stable over at least the past 5 years and dioxin is likely to persist for decades. The reduced fish sampling effort could provide the opportunity to investigate other components of the river system, including sediment - associated dioxin levels or other toxicants, if significant point sources, such as the W WTPs, or non -point sources, such as cattle grazing, are identified. River Science Panel Review Final • Additional sampling of sediments and other biota could provide important information on the remaining "sinks" of dioxin in the river and reservoir, in order to understand the dynamics of the static dioxin levels observed in carp in the reservoir. • Index modifications from NC are consistent within their own regulatory system, but diverge from other broadly used indexes for evaluation of benthic communities. NC analytical tools should be applied to full length of Pigeon River sites (including the Tennessee portion). • More "reference" information is required, either in -Basin or out -of -Basin, in order to set expectations. Results of EPA's EMAP sampling in the region may be useful in capturing expectations for specific settings found throughout the Pigeon River Basin. 5.2 Integration and Management of Data Data management is a key component of any large-scale and long-term monitoring program. Data accessibility is the primary need from the monitoring effort and reflects the program's success. Aggregating data allows presentation in a web -based application where users have continual accessibility and an environment in which users can serve themselves. One of the biggest single deficits of the existing Pigeon River knowledge base is its lack of continuity. Though a variety of "gaps" in existing data have been identified by the Science Panel, it is also clear that much greater utility of existing information would derive from centralized banking of data, statistical summary and review of data, and development and maintenance of meta -data. Tetra Tech has done an excellentjob establishing a prototype database (Tetra Tech, 2004) containing much of the existing historic data through 1998. The Science Panel concurs that a focused future effort to add recent elements to that database, including biological, water quality, and toxicological data collected by numerous entities, would be a requisite adjunct to proposed future monitoring. It would support a more complete assessment of current conditions, and form a basis to which future results can be compared. Some specific recommendations include: - State and facility datasets should be combined in one database. - Consistent sampling locations (by RM) should be applied to all data. This should be correlated directly with water quality and benthic sampling locations to ensure that co -located data can be recognized. - Fish and benthic species data should be provided. - Dioxin and furan isomers should be provided and linked to the TEQs calculated for individual fish species (or individual composites). Duplicate data collection efforts (e.g., fish tissue analyses by Blue Ridge and Progress Energy) should be modified and/or halted, with efforts re -directed at understanding the fate and dynamics of dioxins in sediments, fish in Waterville Reservoir, or other biota found in this habitat. Pigeon River Science Panel Review Final Report 5.3 Sediment Transport Modeling Sediment movement in reaches of this drainage describes fate and intensity of contaminant problems from historic operation of the pulp mill. Mapping the location of the contamination in depositional zones and describing the rate and quantity of transport of sediments will provide enough information to adequately describe risk to species that are potentially exposed to pollutants. Identification of these zones will also provide insight into areas likely to place humans or other higher predators (e.g., river otters) at risk from bioaccumulation of the toxins. • Sediment modeling would provide insight into the processes occurring at the entrance to the reservoir and relative to deeper areas of the reservoir, where dioxin "entombment' may be occurring. • Sediment modeling may be important in understanding the potential for transport of dioxins on sediments into reaches of the river below the dam should water quality indicate that river water can be released to the previously dewatered section. 5.4 Detailed Risk Analysis A full ecological risk analysis could not be conducted by the Science Panel, due mainly to limitations in existing data. Specifically, there generally is insufficient information to identify specific stress sources, to define the contribution of variations in habitat condition, or to define the areas of greatest exposure. Note that even with regard to the paper mill, recent biological collections are usually conducted miles downstream of the discharge. In addition, there.is no information on indicators of organism response outside of a limited sequence of species occurrence/abundance data, and limited fish tissue contaminant concentrations. Also, there is no information on contaminant levels or responses of higher trophic levels. • The available water quality data provided enough insight for identifying general areas of historic impairments in the drainage. However, isolating the specific sources for stressors suspected of occurring along the Pigeon River was not possible unless obvious effluent discharges were known. Integration of observations is possible if monitoring sites are placed above and below many of the obvious disturbance indicators (e.g., nuisance aquatic macrophyte growth), and would support adequate evaluation of effects from the pulp mill and hydropower project. • Habitat zones that accumulate contaminants should be identified and mapped, and more carefully examined for biological and water quality characteristics. These sites should also be monitored over the long -tern so that changes in level of contamination or in spatial extent can be used to indicate the likelihood of target species contact. Target species are fish and macroinvertebrates that had historically occupied this drainage and were identified by examining current geographical range and preferred habitat; they should include those re -introduced species as described in the Pigeon River Recovery Project (PRRP) (Southeastern Fishes Council, 2003). • Setting achievable goals for water quality, habitat availability, and biological integrity should be a high priority. Some of these categories will require more recent knowledge 31 River Science Panel Review Final of community conditions, estimates for areal extent of select habitats, and thorough understanding for expectations of chemical conditions throughout the Pigeon River Basin. Goals may be aligned with criteria for water quality, biology, or needs for specific habitat that supports critical life stages of fish or other species. In some cases, analytical tools like biotic indexes or predictive models would be helpful in evaluating environmental conditions. In order to understand the ecological risks posed by the dioxins remaining in fish and sediments, an evaluation of the potential for accumulation in predators, such as otter or birds of prey, may need to be conducted. This evaluation would be feasible if the available data are developed into a fully integrated database containing dioxin and other toxicant data, and water quality data supplemented by habitat descriptions and species found in each reach of the river. 6.0 Literature Reviewed and/or Cited Reports Burr, J. 2004. Macroinvertebrate Assessment Report. A six -page fax (subject Pigeon Benthos) sent to David McKinney by Jonathan Burr, of TWRA, listing Tennessee Core Metrics and Taxa Lists. 2. CP&L, Environmental Services Section. 2002. Walters Hydroelectric Plant, FERC Project No. 432, 2001 Water Quality and Biotic Indices Studies of the Pigeon River at the Walters Hydroelectric Plant: Appendix A Requirements and Historical overview. EA Engineering, Science, and Technology, Inc. 1988. Synoptic Survey of Physical and Biological Condition of the Pigeon River in the Vicinity of Champion International's Canton Mill. EA Report CHI75K. Prepared for International Corporation, Stamford Connecticut. 373pgs. 4. EA Engineering, Science, and Technology, Inc. 2001. A Study of the Aquatic Resources of the Pigeon River during 2000. Prepared for Blue Ridge Paper Products, Inc., Canton, NC. EA Project 13715.02. 5. EA Engineering, Science, and Technology, Inc. 2004. Results of 2003 Dioxin Monitoring in Fish Tissue. Prepared for Blue Ridge Paper Products, Inc. January. 6. EA Engineering, Science, and Technology, Inc. 2004. Results of 2004 Dioxin Monitoring in Fish Tissue. Prepared for Blue Ridge Paper Products, Inc. December. Hudson, R.G. and E. Gee. (1996). The Acute Effects of Pigeon River Water on Freshwater Juvenile Mussels. Prepared for Tennessee Wildlife Resources Agency. June 26-July 4. 22pgs. 16 River Science Panel Revieiv Final Progress Energy Carolinas, Inc. 2004. Dioxin and Furan Concentrations in the Axial Muscle Tissue of Fish from Walters Lake, November 2003. Walters Hydroelectric Plant Federal Energy Regulatory Commission Project No. 409. Environmental Services Section. 9. State of North Carolina. Department of Environment and Natural Resources. 1996. Settlement Agreement Regarding 1996 Water Quality Color Variance and 1996 NPDES Permit Issued to Champion International Corporation. 10. State of North Carolina, Department of Environment and Natural Resources, Division of Water Quality. 2003. Basin -wide Assessment Report — French Broad River Basin, June 2003. Pages 65 to 80 and pages 165 to 191. 11. Stober, Q.J. 1989. Pigeon River Dioxin Study: Proposal to Assess Fate and Transport and Ecological Risk. January 1989. USEPA Region IV, Athens, GA. 12. Tetra Tech, Inc. 2004. Pigeon River Watershed Data Evaluation. Prepared for USEPA Region IV, September. 13. Tiernan, T.O, D.J. Wagel, G.F. VanNess, J.G. Solch, J.H. Garrett, and F. Rukunda. 1997. Annual Report for the First Year of the Project (November 1, 1996 — June 30, 1997): Determination ofNonpoint-Source Pesticides and Related Bioaccumulative Pollutants in Fish, Mussel and Other Aquatic Animal Tissues. Prepared for the Environmental Services Division of the Tennessee Wildlife Resources Agency. December 1997. 12pgs. 14. U.S. Environmental Protection Agency, Region IV. 1988. Assessment of Dioxin Contamination of Water, Sediment and Fish in the Pigeon River System (A Synoptic Study). November 15. 15. U.S. Environmental Protection Agency. 1999. Polychlorinated Dibenzo-p-dioxins and Related Compounds Update: Impact on Fish Advisories. EPA-823-F-99-015. Office of Water. 16. World Health Organization (WHO). 1997. Exposure and Human Health Reassessment of 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) and Related Compounds: Part II Health Assessment of 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) and Related Compounds. Scientific and popular literature Adams, S.M., W.D. Crumby, M.S. Greeley, Jr., L.R. Shugart, and C.F. Saylor. 1992. Response of Fish Populations and Communities to Pulp Mill Effluents: a Holistic Assessment. Ecotoxicology and Environmental Safety 24: 347-360. River Science Panel Review Final 2. Adams, S.M. and M.S. Greeley, Jr. 1996. Establishing possible links between aquatic ecosystem health and human health: an integrated approach. Pages 91-102. in. R.T. Di Giulio (editor) Interconnections Between Human and Ecosystem Health. Chapman & Hall, London, England. Adams, S.M., K.D. Ham, M.S. Greeley, R.F. LeHew, D.E. Hinton, and C.F. Saylor. 1996. Downstream gradients in bioindicator responses: point source contaminant effects on fish health. Can. J. Fish. Aquat. Sci. 53: 2177-2187. 4. Adriaens, P., Q. Fu, and D. Grbic-Galic. 1995. Bioavailability and Transformation of Highly Chlorinated Dibenzo-p-dioxins and Dibenzofurans in Anaerobic Soils and Sediments. Environmental Science and Technology 29(9): 2252-2260. Adriaens, P., A.L. Barkovskii, M. Lynam, J. Damborsky, and M. Kuty. 1996. Polychlorinated dibenzop-dioxins in anaerobic soils and sediments. Pages 51-64, in W.J.G.M. Peijnenburg and J. Damborsky (editors). Biodegradability Prediction, Kluwer Academic Publishers, Netherlands. Adriaens, P., P.R. Chang, and A.L. Barkovskii. 1996. Dechlorination of PCDD/F by organic and inorganic electron transfer molecules in reduced environments. Chemosphere. 32(3): 433-441. 7. Albrecht, I.D. and P. Adriaens. 1997. Evaluating the Fate of Dioxins in Reduced Sediments: Evidence for Natural Reductive Dechlorination Processes. Pages 405-408 in H. Verochevtard and W. Vestnoete (editors). International Symposium for Environmental Biotechnology. (ISEB). Technological Institute, Antwerp, Belgium. Barkovskii, A. and P. Adriaens. 1995. Biological and Abiotic Dechlorination of Highly Chlorinated Dioxins in Bi-phasic Microcosms. Bioremediation of Recalcitrant Organics 3(7): 73-82. Barkovskii, A.L. and P. Adams. 1996. Microbial Declorination of Historically Present and Freshly Spiked Chlorinated Dioxins and Diversity of Dioxin-Dechlorinating Populations. Applied and Environmental Microbiology 62(12): 4556-4562. 10. Coombs, J.A. 2004. Pigeon River Revival. Wildlife in North Carolina Magazine. December 2004: 27-29. 11. Manuel, J. 1993. The Pigeon Flies Again. Canoe Magazine, August 1993. Permits State of North Carolina, Department of Environment and Natural Resources, Division of Water Quality. 2004. Permit to Discharge Wastewater Under the National Pollution Discharge Elimination System. Granted to the Blue Ridge Paper Products Inc., Canton Mill Wastewater Treatment Plant, Canton, NC. 34 River Science Panel Review Final Meetings 1. Pigeon River Recovery Project (PRRP) Meeting. 2005. TDEC-WPC Knoxville Office, January 19. 35 River Science Panel Review Final Powerfquse ,•-•-TN .•-.� B=- , • , -•' ♦Q ' Gwnmro0 Crook a Bi°sect` +, l cow SPM°s Creek a , ML.sterlin0 Creek +,>`, Haan Don Diversbn T=el—Yp+ ` Hurricane Creek , Dicks Branch ,� r .-- 0 PI°oen RWer (bypassed reach) r. 'Calaloahee Creek ♦ Walters Lake Not to scale BIw ewes Paper +1 Rod a ine. 'i iV.hwmd. IIWmY' y�1J _ US f923' - t Canton 0 1 2 1011y . t 0 0.5 1 ♦ - Mlles r� r / Nci'i pvt" - To Carden, NC K . Figure I. Map of Pigeon River features (adapted from CP&L 2002). Science Panel Review Appalachian Ridges and Valleys 1901 A River Miles A Canton (Papermill) Rivers n/ Rivers /�,/ Tributaries ~State Line " 0 HUC Boundaries(11 digit) W*E Waterbodies "5 INS] Mountains 20 0 20 Miles Figure 2. Map of Pigeon River basin, showing sampling stations with definition of zones (A-H) along the mainstem. Final Pigeon River Science Panel Review Final a b d U 400 — (j 2M 0 1993 1999 2004 1982 1988 1993 1999 2004 ar ImgY®r S9i bgYear e f g 40 200 ...� 1982 1988 1993 1999 20 az ME h Sm frog Y®r 9 400 200 0 1982 1989 1993 199 3 SamMg Year Sv Mg 14 ' Figure 3. Temporal and spatial patterns for water Color observations (units) described by "zones" in the Pigeon River that extend from North Carolina and end in Tennessee. Data describing Color units and variance for each year may originate from one or more stations within each zone. (The error bars represent one standard deviation about the mean.) J 1 River Science Panel Review III Sampling Year f Sampling Year D4 04 e loot E 801 N 9_ 6 601 V) a m 0 401 N N_ O0 201 H D 1986 1992 1998 2004 Sampling Year 9 Sampling Year 74 Final Figure 4. Temporal and spatial patterns for Total Dissolved Solids (TDS) concentrations (mg/L) described by "zones" in the Pigeon River that extend from North Carolina and end in Tennessee. Data describing TDS concentrations and variance for each year may originate from one or more stations within each zone. (The error bars represent one standard deviation about the mean.) r River Science Panel Review a J Sampling Year f 100 04 J E 80 y U -Con 60 9 N a m 40 a N U) m 20 f- O 61 1 •• I I•• I I • 1 1986 1992 1998 2004 Sampling Year e 1998 2004 Sampling Year 9 Sampling Year M Figure 5. Temporal and spatial patterns for Total Suspended Solids (TSS) concentrations (mg/L) described by "zones" in the Pigeon River that extend from North Carolina and end in Tennessee. Data describing TSS concentrations and variance for each year may originate from one or more stations within each zone. (The error bars represent one standard deviation about the mean.) Final River Science Panel Review 700 600 500 400 N `u 306 200 100 Final 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 Figure 6. Annual average stream flow in the Pigeon River near Hepco, NC (USGS gage # 03459500), RM 45.1, 1980-2002. J E E Z m 0 0 E E J m E z m G E E River Science Panel Review a Sampling Year f Sampling Year M 04 J m E Z m c E E E e 1986 1992 1998 2004 Sampling Year 9 1.000 0.800 J m E 0.600 z m E 0.400 E 0.200 0.000 � 1986 1992 1998 2004 Sampling Year Figure 7. Temporal and spatial patterns for Ammonia (NH3-N) concentrations (ni described by "zones" in the Pigeon River that extend from North Carolina and end in Tennessee. Data describing NH3-N concentrations and variance for each year may originate from one or more stations within each zone. Data collected from zone "e" in 2004 are represented by a single observation collected from surface water at two locations in Waterville Reservoir. (The error bars represent one standard deviation about the mean.) Final e River Science Panel Review ­986 1992 1998 2004 Sampling Year f 6.000 6.000 J E 4.000 c w 0 3.000 a z 2.000 F 1.000 0 000 J m E C N 2 O Z O F e 1986 1992 1998 2004 Sampling Year 9 6.000 5.000 J E 4.000 w 0 3.000 z m 2.000 ' o H 1.000 0 000 1986 1992 1998 2004 1986 1992 1998 2004 Sampling Year Sampling Year Figure 8. Temporal and spatial patterns for Total Nitrogen (TN) concentrations (mg/L) described by "zones" in the Pigeon River that extend from North Carolina and end in Tennessee. Data describing Total Nitrogen concentrations and variance for each year may originate from one or more stations within each zone. Data collected from zone "e" in 2004 are represented by a single observation collected from surface water at two locations in Waterville Reservoir. (The error bars represent one standard deviation about the mean.) L Final 43 J J River Science Panel Revieiv My' a Sampling Year f A J E E J e 1986 1992 1998 Sampling Year 9 2004 Final 1986 1992 1998 2004 1986 1992 1998 2004 Sampling Year Sampling Year Figure 9. Temporal and spatial patterns for Total Phosphorus (TP) concentrations (mg/L) described by "zones" in the Pigeon River that extend from North Carolina and end in Tennessee. Data describing TP concentrations and variance for each year may originate from one or more stations within each zone. Data collected from zone "e in 2004 are represented by a single observation collected from surface water at two locations in Waterville Reservoir. (The error bars represent one standard deviation about the mean.) 44 Pigeon River Science Panel Review a ,5.0 a = 100 = 5.0 o a o 00 1998 1992 1998 2009 S.Wlhg Y®r e Iq E 0 O 2 Sa Iing Y®r E O 18 Sanpling Ym I Sa ling Year 9 Sv ling Y®r Figure 10. Temporal and spatial patterns for Dissolved Oxygen (DO) concentrations (mg/L) described by "zones" in the Pigeon River that extend from North Carolina and end in Tennessee. Data describing DO concentrations and variance for each year may originate from one or more stations within each zone. Data collected from zone "e" in 2004 are represented by a single observation collected from surface water at two locations in Waterville Reservoir. (The error bars represent one standard deviation about the mean.) Final M 30 25 20 t- w 15 tt 10 5 River Science Panel Review Final 65.5 42.5 32 26 River Mlle Figure 11. Number of EPT taxa in benthic communities of the Pigeon River in North Carolina and Tennessee, September 2001 (from CP&L). 40 35 30 25 w 20 u 15 10 5 64.5 57.5 41.5 River Mile Figure 12. Number of EPT taxa in benthic communities of the Pigeon River in North Carolina, July 2002 (from NCDENR) 30 25 20 10 5 River Science Panel Review Final 1 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 Figure 13. Number of EPT taxa in benthic communities of the Pigeon River in North Carolina below the Blue Ridge Paper Mill (Zone "d") from 1983-2002. 60 ._... _... ... .. __ Ekellent 54 Good 48 r I 42 Fair 36 :. ... N N v0 0i 30---W"'- °1 Poor 24 Very Poor 18 12 6 0 8.2 16.5 55.4 64.5 Sampling Stations by River Mile Canton Figure 14. Fish Index of Biotic Integrity (IBI) for several locations along the Pigeon River, NC and TN, collected by TVA in 1990 and 1997. - ■ 1990 ❑ 1997 47 35 30 25 n = 20 a `s 15 a E 10 5 0 60 54 48 c 30 24 18 River Science Panel Revieu, Final 64.5 63 59 55.5 54.5 48.2 42.6 24.9 19.3 16.5 8.2 River Mile Figure 15. Number of native species of fishes along the length of the Pigeon River, from above the paper mile discharge (RM 64.5) to Tannery Island, TN (RM 8.2), 1995. 12 88 89 90 91 92 93 94 95 96 97 9B 99 00 01 02 03 Years Figure 16. Fish Community Index of Biotic Integrity (IBI) at two locations on the lower Pigeon River, TN, Denton (RM 16.5) and Tannery Island (RM 8.2), 1988-2003 (from Charles F. Saylor, personal communication, 2005). 48 Sum of CDD (p9rg) 40 35 w 30 U O U 25 u a N L 20 N LL m A Z 15 O `a E i 10 5 0 River Science Pane( Review Final .. Champion ... ..... 40 35 w 30 U O U 25 u a N L 20 N LL m A Z 15 O `a E i 10 5 0 River Science Pane( Review Final .. Champion ... ..... Modernization - 4 k F i �v 4 ❑ Denton ■Tannery 88 89 90 91 ^ 92 93 94 95 96 97 98 99 00 01 02 03 Years Figure 17. Number of Native Fish Species collected from the Pigeon River at two locations on the lower Pigeon River, TN, Denton (RM 16.5) and Tannery Island (RM 8.2), 1988-2003. Stelidn (NI)L� RiveMile 64.5 �" 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 Species +0lackredhorse —B—Commonc —O Redbreast ery sunfish 5< Rockbass 1990 1991 1992 1993 1904 1995 1996 1997 199E 1999 2000 2001 2002 20M 20M Year. ® . m Approximate median ofdelection limits for TCDD in all species (1990-2003) Figure 18. TCDD concentrations measured in all fish species sampled at RM 64.5 (non -detects reported at the detection limit). 49 r f � Pigeon River. Science Panel Review Final Report 1.6 1.4 12 1 0.8 0.6 0.4 0.2 0 �ti—Black reohorse f Redbreaslsun5sh ,Rockbass 1990 1991 1992 1993 1994 1995 '1996 1997 1998 1999 2000 2001 2002 2003 2004 Year .: Approximate median ofdcicction limits far TCDD in all species (1990-2003) Figure 19. TCDD concentrations measured in three fish species (not including carp) sampled at RM 64.5 (non -detects reported at the detection limit). �Stedon (I An�Rivabile 59 (= 25 20 15 10 5 0 19M im 1992 1993 1994 1995 1996 1997 19M 1999 2W0 2001 2002 2003 2004 Year.;. Figure 20. TCDD concentrations measured in all fish species sampled at RM 59 (non -detects reported at the detection limit). Species t Charnel catfish - Cwmoncaip -h Redbreaslsw6sh 50 f r e 4.5 4 3.5 3 25 2 1.5 River Science Panel Review Final SPecres �,- Btuetpil — Canmoncarp —c—Recbmastsuffsh 0.5 1990 1991 1992 1993 1999 1995 19% 1997 1998 1999 2000 2001 2002 20M 2009 yeaA Appmzimate median of detection limits JbrTCDD in all species (1990-2003) Figure 21. TCDD concentrations measured in all fish species sampled at RM 52.3 (non -detects reported at the detection limit). I 2. �Bluegill FfRedbreastsunfish 0. 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Approximate median of detection limits for TCDD in all species (1990-2003) Figure 22. TCDD concentrations measured in two fish species (not including carp) sampled at RM 52.3 (non -detects reported at the detection limit). i r' a Pigeon River Science Panel Review Statian (Npl:: Ri--I 41.5S=Ii 35 30 25 20 15 10 5 0 1990 1991 1992 19M 1994 1995 19% 1997 1998 1999 2000 2001 2002 2003 2004 year'. Figure 23. 'TCDD concentrations measured in all fish species sampled at RM 41.5 (non -detects reported at the detection limit). Station (a10 t� Rivehfle41.5t=� sumo( 2,j 8-TCDD (pgrg) 3 2.5 2- 0. 5 0 Final Spedes ` +Bmckcrapple — Bluegil —rl—Channcicatlish —tFCommon carp —it Fladheadcatish — Largemouth bass species 0 Blackcrapple ——Blucgil —a—Channalca7sh —x--Flatheadcatish — Largemomh bass 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 year', Approximate median of dctecdon limits for TCDD in all species (1990-2003) Figure 24. TCDD concentrations measured in five fish species (not including carp) sampled at RM 41.5, at head of reservoir (non -detects reported at the detection limit). 52 f 1 ^ f Pigeon River Science Panel Review Final Report Station, (Alp .- Rir'e1Ml 39 70 60 50 40 30 20 10 0 1990 1991 1992 1993 1994 1995 19M 1997 1996 1999 2000 2001 2002 2003 2W4 ' Yeah Figure 25. TCDD concentrations measured in all fish species sampled at RM 39, near dam in reservoir (non -detects reported at the detection limit). Staiion (api=. Riveifvile a9 P3 Spedes. +Black crappie tBluegi4 —h—Channel cat ish —1E—Common wry —>t—Flatheaoeatish 'Largemouth bass 1.e .p 1.6 .. - 1.4 1.2 2.. Black crappie crappie �r Chamelcagish it --Flativeadeatfish 0.6 .. - -io--latgemculhbass 0.6 • e S :a.... m -.. s:r. .....--n. nw c-. .�. ... • srn • ..v.... .w n e. m. e 0.2 0 ' 1990 1991 1992 1993 MA 1995 19M 1997 19M 1999 2000 2001 20D2 2003 20D4 year m Appmzimatemedianofde(muoulimits forTCDD in all species (1990-2003) Figure 26. TCDD concentrations measured in six fish species (not including carp) sampled at RM 39, near dam in reservoir (non -detects reported at the detection limit). 53 Pigeon River Science Panel Review Station (PII) , Riierldlel 19, 0.7 0.6 a ` � t 0.5 0.4 0.3 02 Final Species Black reahorse —n— Redbreast sunfish A Rockbass —x—Smallmouth bass —x Smallmouth buffalo �Spnttedbass 0.1 JAM 0 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Year I Approximate median ofdetection limits for TCDD in all species (1990-2003) Figure 27. TCDD concentrations measured in six fish species sampled at RM 19 (non -detects reported at the detection limit). 54 F�� BLUE RIDGE PAPER PRODUCTS INC. February 23, 2006 CERTIFIED MAIL RETURN RECEIPT REQUESTED 7099 3220 0007 0371 6167 North Carolina Department of Environment and Natural Resources Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Attn: Central Files Re: NPDES NO. NC0000272 Best Management Practices 2005 Annual Report Blue Ridge Paper Products, Inc. Canton, NC Please find attached two copies of the data summary of Best Management Practices (BMP) daily monitoring for Blue Ridge Paper Product's Inc., Canton Mill. This submission is required by Special Condition A.(6.) Best Management Practices, Section E4 and Section F1, of the mill's NPDES Permit No. NC0000272. The Canton Mill's BMP Plan specifies that investigative action will be performed when the Primary Influent Lower Action Level of 70,322 Ibs/day of True Color is exceeded for two consecutive days. Investigative action was conducted for the three Lower Action Level exceedances in 2005, listed below: Date Primary Influent Color 22-Jan-05 74,548 23-Jan-05 124,216 20-Aug-05 70,340 21-Aug-05 138,804 10-Oct-05 131,324 11-Oct-05 73,399 The Canton Mill's BMP Plan specifies that investigative and corrective action will be performed when the Primary Influent Upper Action Level of 78,609 Ibs/day of True Color is exceeded for two consecutive days. The Canton mill did not trigger this requirement in 2005. Environmental Group 175 Main Street • PO Box 4000 Canton, North Carolina 28716 • 828-646-2000 Raising Your Expectations 23 February 2006, Page 2 The Canton Mill's BMP Plan specifies that immediate investigative and corrective action will be performed when the Primary Influent Out -of -Control Level of 92,734 Ibs/day of True Color is exceeded for one day. Investigative and corrective actions were conducted for the eight Out -of - Control Level exceedances in 2005, listed below. Date Primary Influent Color 13-Jan-05 102,195 23-Jan-05 124,216 11-May-05 144,254 28-Jun-05 273,059 21-Aug-05 138,804 04-Oct-05 166,786 10-Oct-05 131,324 03-Nov-05 101,464 A table of the BMP Action Level exceedances and corresponding corrective actions is attached. There were no action level exceedances that resulted in disruptions to the Wastewater Treatment Plant. Please call us if you have any questions or concerns regarding this information. Sincerely, Glenn Rogers Water Compliance Coordinator 828-646-2874 rogerq@blueridgel3aper.com Paul Dickens Manager, Environmental Affairs 828-646-6141 dickeo@blueridgepaper.com Attachment: 2005 BMP Action Level Exceedances and Corrective Action cc: Mr. D. Keith Haynes (w/ attachments) Environmental Specialist North Carolina Department of Environment & Natural Resources 2090 U.S. Highway 70 Swannanoa, NC 28778 Environmental Group 175 Main Street • PO Box 4000 Canton, North Carolina 28716 • 828-646-2000 Raising Your Expectations 23 February 2006, Page 3 Internal Distribution: C. File —Water BMP Notebook B. Williams D. Brown B.Shanahan J. Clary J. Pryately Environmental. Group 175 Main Street • PO Box 4000 Canton, North Carolina 28716 9 828-646-2000 Raising Your Expectations 2005 BMP Action Level Exceedances and Corresponding Corrective Actions NPDES No. NC 0000272 Blue Ridge Paper Products, Inc. Canton, NC Dates Primary Influent Color BMP/Non-BMP Event and Corrective Action Both Recovery Furnaces were forced down due to operational problems. No. 11 recovery cyclones plugged requiring washing. With both furnaces down for extended period, West GB Evaporators were shut down. Concentrated black liquor from cyclone wash and from GB boilout was captured for recovery. Rinse water from the GB boilout and cyclone wash contributed to elevated color as the spill collection system was full and the rinse water had 13-Jan-05 102,195 BMP to be sewered. There was no detrimental impact on the Wastewater Treatment Plant. An unplanned outage on #10 Recovery boiler led to storage of black liquor. A steam purge line on the transfer line to the storage area was open in order to drain for freeze protection. An operator failed to close the drain valve which resulted in black liquor flowing back through the steam purge and draining to containment and the sewer. In addition, the 22-Jan-05 74,548 CRP filtrate return pump failed on 1/23 causing the fitrate tank to overflow to the sewer. 23-Jan-05 124,216 BMP Leak on the steam purge line and the CRP purge pump were fixed. The evaporator feed pump tripped out which allowed the hardwood weak black liquor tank to overflow. During the overflow, the DCS controller was down for repair. Therefore, no alarm was given to notify the operators of the situation. Once the overflow was discovered, the wastewater treatment plant was notified and the release was diverted to the off-line spare clarifier for later treatment at a non -disruptive rate. In addition, an interlock stop was put in the tank control logic to prevent sending material into the tank in 11-May-05 144,254 BMP the event of another pump failure. BMP 2005 Report Data, BMP Summary Page 1 of 2 Printed 2/22/2006 20-Aug-05 10-Oct-05 70,340 166.786 131,324 F-M" During start-up of #11 Recovery Boiler and following an upper furnace wash and cyclone wash the black liquor heater secondary drain valve was inadvertantly left open, draining black ligour to the sewer. The problem was not immediately identified due to the location of the drain line discharge which was difficult to see. The secondary liquor heater drain was re-routed to a point that is more visible and accessible. This will facilitate better idantifinstinn of inorooer valve position during start-up inspections in the future. An unanticipated total mill power outage due to a Progress Energy transformer explosion led to unavoidable loss of material to the in -mill sewer system. The mill's extensive sump system was able to collect most of the material. After spill collection systems were at capacity, sporadic overflows of these systems occurred on 8120 and 8/21. Whenever possible, material was diverted to the off-line spare clarifier for later treatment at a non - This elevated color resulted from a planned outage that involved maintenance on the Hardwood Fiberline and #11 Recovery Boiler. Due to the extended nature of this outage, not all material could be recovered. There was no detrimental impact on the Wastewater Treatment Plant as material was diverted to the off-line spare clarifier for later treatment at #19 digester developed two tube ruptures at approximately 0200 the morning of 10/10. The loss of material was such that it contaminated the boiler feedwater system. Therefore, mill personnel had to divert the contaminated feedwater to the mill sewer system the morning of 10/10. There was no detrimental impact on the Wastewater Treatment Plant as material was diverted to the off-line spare clarifier for later treatment n nnn-disruptive rate. 2 BMP 2005 Report Data, BMPage of 2 Printed 2/22/2006P Summary ' o�oF wArF,�Qc l ®En >_ y O < Mr. Paul Dickens, Manager Environmental Affairs Blue Ridge Paper Products, Inc. 175 Main Street, P.O. Box 4000 Canton, North Carolina 28716 Dear Mr. Dickens: Michael F. Easley Governor William G. Ross, Jr., Secretary North Carolina Department of Environment and Natural Resources Alan W. Klimek, P.E., Director '--- - - - Division of Water Quality January 25, 2006 JAN �O�o i I- - Subject: Color Report/316a Report Extension Request Blue Ridge Paper — Canton Mill NPDES Permit No. NC0000272 Haywood County The Division of Water Quality (Division) has reviewed your report entitled "Effluent Color Performance Following Highest Certainty and Reasonable Certainty Actions". The Division commends Blue Ridge Paper Products' efforts on reducing color in the effluent. The Division has also reviewed your request (dated January 12,2006) for an extension of the Part I, Condition A.(8). Paragraph 10 stipulation (Color Variance Report) of the subject NPDES permit. According to condition A (8.) Paragraph 8 of your permit, the new effluent color limit shall be established based on the submitted statistical analysis report via recommendation to the NPDES Committee by February 1, 2006. Due to high flow conditions in the Pigeon River during the summer of 2005, it is our understanding that the field work for the 316a study was delayed. This information is necessary for the completion of the Color Variance Report. Therefore, the Division is willing to extend the due date of the subject report and the 316a Study Report, until May 31, 2006. This date coincides with the date of the NPDES Permit Renewal Application. It should be noted that this date extension does not change any other compliance date requirements of the Permit. The Division will conduct consultations with the members of the Technology Review Workgroup (TRW) during renewal of the permit to set a color limit that is acceptable to the TRW members. If you have any questions concerning this issue, please contact Sergei Chemikov at telephone number (919) 733-5083, extension 594, or Mr. Roger Edwards, or Mr. Keith Haynes of our Asheville Regional Office at 828-2964500. Sincerely, mj--� Alan Klimek, P.E. Cc: Central Files NPDES Files Asheville Regional Office, Surface Water Protection Roosevelt Childress, EPA Region IV Don Anderson, US EPA, Office of Water, Office of Science and Technology (4301 T), 1200 Pennsylvania Avenue, NW, Washington, DC 20460 N. C. Division of Water Quality 1 NPDES Unit 1617 Mail Service Center, Raleigh, NC 27699-1617 Internet: h2o.encstate.nc.us Phone: (919) 733-M fax: (919) 733-0719 DENR Customer Service Center: 1 800 623-7748 BLUE RIDGE PAPER PRODUCTS INC. 5 December 2005 Ms. Michele Phillips Division of Water Quality Certified Mail Return Receipt Requested 7099 3220 0007 0371 594m F e,^ — —T" 54,uk North Carolina Department of Environm and Natural Resources --tv K . n 1617 Mail Service Center (/� Raleigh, NC 27699-1617 Subject: Notice of Incomplete Discharge Monitoring Report NPDES Permit No. NC0000272 Blue Ridge Paper Products Inc. Canton, North Carolina Deaf: Ms. Phillips: DEC 1 2 2005 In response to the letter dated October 17, 2005 from the Division of Water Quality (see enclosure), Blue Ridge has submitted all the requested information with its October 2005 Discharge Monitoring Report (DMR). You will notice that the parameter codes and missing flow information have now been corrected per your office's request. L•lll Blue Ridge regrets the.late submission of the corrections to your office, however, the letter dated October 17, 2005 was originally sent to the wrong address and was not received by this office until November 15, 2005. By taking the necessary steps to correct these issues with the DMR and submitting copies to your office, Blue Ridge has complied with your request and considers this matter closed. If you have any questions, please don't hesitate to contact us. Sincerely, J. Glenn Rogers Paul S. Dickens Water Compliance Coordinator Manager, Environmental Affairs 828-646-2381 828-646-6141 rogerg@blueridgepaper.com dickep@blueridgepaper.com Environmental Group 175 Main Street • PO Box 4000 Canton, North Carolina 28716 • 828-646-2000 Raising Your Expectations 4. Ms. Michele Phillips, NC DENR DWQ 5 December 2005, Page 2 Enclosure: October 17, 2005 Letter from DWQ cc: Keith Haynes Environmental Specialist Division of Water Quality North Carolina Department of Environment and Natural Resources Asheville Regional Office 2090 US Highway 70 Swannanoa, North Carolina 28778 Internal Distribution: C. File Water J. Pryately L. Cooper Environmental Group 175 Main Street • PO Box 4000 Canton, North Carolina 28716 • 828-646-2000 Raising Your Expectations W AT F,7Q I'lichael F. Easley, Governor ���➢ - Winiain G. Ross Jr., Secretary r North Carolina Department of Environment and Natural Resources a s —I .. A]= W. Klimek, P. E. Director Division of Water Quality Date: October 17. 2005 Derric Brown WPa.� n 0�resa 1329 Howell Mill Road Waynesville, NC 28786 Subject: Notice of Incomplete Discharge Monitoring Report Dear Permittee: The purpose of this letter is to call your attention to problems with the recent submittal of the Discharge Monitoring Report (DMR) from your facility. As you may know, the data recorded on your DMR is keyed into the Division's database. Our.data entry staff has informed me of problems with your recent DMR submittal. Until these problems have been corrected, your DMR will be considered incomplete. Please see the attached form along with a copy of the problem DMR for details regarding the DMR's deficiency. Incomplete or illegible DMRs affect our staff's ability to provide a timely and effective evaluation of DMR submittals. Please be aware that until the Division receives a corrected DMR, you may be considered noncompliant with your NPDES permit and 15A NCAC 02B .0506, and you may be subject to further enforcement action. Please take the necessary steps to correct the problems and submit two copies of the amended DMR within fifteen (15) days of the date of this letter to the following address: Attention: Michele Phillips Division of Water Quality Central Files 1617 Mail Service Center Raleigh, North Carolina 27699-1617 Future DMR submittals with the same or similar problems will be unacceptable. If you have any questions about the proper completion of DMRs, please contact Michele Phillips at 919-733-5083 Ext. 225. Thank you for your assistance in this matter. Sincerely, �¢J>/Alan W. Klimek, P.E. cc: Asheville Regional Office /VJ( Central Files NO ortnhCarolina Xmiro!!Y N. C. Division of Water Quality 1617 Mail Service Center Raleigh, North Carolina 27699-1617 Phone: (919) 733-7015 Customer Service Internet: hllpl/h2o.em.stale.oc.us 512 N. Salisbury St. Raleigh, NC 27604 Fax! (919) 733-0719 l-M-623-6748 An Equal Opportunity/Affirmative Action Employer 9off6e of Incomplete Discharge Monitoring Report D 6 X7 Permit Number. Facility: Bdw�I�AIA&-cP(Q y45 14-1G. County ftu U&f)rL- DNMMonth and Year. %A&Zt Q The Division of Water Quality deems the aforementioned DMR as incomplete due to the followingreason(s): (Please seethe highlighted areas on the attached DM.Rjor details.) ❑ The written values are, illegible. ❑ The Average, Maximum, and/or the Minimum data points have been omitted. ❑ The Units of Measure have been omitted or are incorrect. ❑ The DNa Parameter Codes have been omitted- .2.U. 2,U. 1-1:1-1 �Zs /V-)I 06� BLUE RIDGE PAPER PRODUCTS INC. 4 January 2006 D. Keith Haynes Environmental Specialist North Carolina Department of Environment And Natural Resources Division of Water Quality 2090 US Highway 70 Swannanoa, NC 28778 Subject: NPDES NC0000272 2005 Annual Average Color Blue Ridge Paper Products, Inc. Canton, NC Dear Mr. Haynes - JAN - 6 2006 CERTIFIED MAIL Return Receipt Requested 7099 3220 0007 0371 5948 This letter and attachment document the 2005 average annual color discharge from the Blue Ridge Paper Products, Inc. mill in Canton, North Carolina. The average secondary effluent color discharge for the calendar period 1 Jan 2005 through 31 Dec 2005 was 39,103 ibs/day. The attachment provides daily wastewater discharge flows and color from the mill during 2005. Sincerely, � A�```� J. Glenn Rogers Water Compliance Coordinator 828-646-2874 rogerg@blueridgepaper.com Paul S. Dickens Manager, Environmental Affairs 828-646-6141 dickep@blueridgepaper.com Attachment: Daily flow and color discharge for 2005 175 Main Street • PO Box 4000 Canton, North Carolina 28716 • 828-646-2000 Raising Your Expectations Keith Haynes, NC DENR DWQ 5 Jan 2005, Page 2 Distribution C File - Water L. Cooper J. Pryately B. Shanahan D. Brown J. Clary 175 Main Street • PO Box 4000 Canton, North Carolina 28716 • 828-646-2000 Raising Your Expectations 2005 Discharge Color Data NPDES Permit No. NC0000272 Blue Ridge Paper Products, Inc. Canton, NC Date Flow m d Color Ibs/da l/l/2005 25.42 50,881 1/2/2005 25.5 46,787 1/3/2005 25.2 45,817 1/4/2005 '25.01 32,330 1/5/2005 25.51 24,254 1/6/2005 26.11 34,841 1/7/2005 24.64 38,067 1/8/2005 24.35 38,179 1/9/2005 24.96 39,135 1/10/2005 24.82 42,228 1/11/2005 25.14 36.901 1/12/2005 24.37 33,536 1/13/2005 28.9 48,205 1/14/2005 27.99 47,621 1/15/2005 26.02 35,155 1/16/2005 25.75 35,864 1/17/2005 25.26 41,502 1/18/2005 24.95 40,368 1/19/2005 24.68 46,930 1/20/2005 23.89 43,435 1/21/2005 27.73 49,260 1/22/2005 26.29 43,632 1/23/2005 24.99 51,479 1/24/2005 24.85 54,299 1/25/2005 24.95 35,374 1/26/2005 25.66 29,533 1/27/2005 25.2 34,468 1/28/2005 25.26 35,392 1/29/2005 25.62 29,487 1/30/2005 25.6 31,599 1/31/2005 25.95 47,613 2/1/2005 24.95 37,871 2/212005 24.86 34,210 213/2005 26.04 34,313 2/4/2005 25.33 42,673 2/5/2005 25.81 42,836 2/6/2005 26.09 40,907 2!7/2005 27.03 55,681 2/8/2005 27.3 57,376 2/9/2005 26.23 60,815 2/10/2005 25.97 70,608 2/11/2005 24.8 49,226 2/12/2005 24.41 52,320 2/13/2005 24.52 43,353 2114/2005 24.79 45,398 2/15/2005 24.49 39,420 2/16/2005 25.26 42,976 2/17/2005 25.45 52,851 2/18/2005 23.93 50,094 2/19/2005 23.06 40,580 2/20/2005 25.42 48,125 2/21/2005 27.27 46,851 2/22/2005 26.11 42,898 2/23/2005 24.99 39,808 2/24/2005 26.23 62,565 2/25/2005 24.2 36,329 2/26/2005 27 39,181 2/27/2005 24.5 38,414 2/28/2005 25.26 38,342 Subtotal Ibs 2,53 192 Date Flow m d Color Ibs/da 3/l/2005 23.21 30,391 3/2/2005 23.07 25,975 3/3/2005 22.26 26,919 3/4/2005 22.51 37,171 3/5/2005 24.7 38,934 3/6/2005 24.53 36,415 3/7/2005 25.49 38,053 3/8/2005 26.54 32,316 3/9/2005 24.18 32,669 3/10/2005 24.09 34,155 3/11/2005 25.57 33,268 3/12/2005 23.88 37,840 3/13/2005 23.26 38,992 3/14/2005 23.14 39,176 3/15/2005 23.29 36,711 3/16/2005 23.27 32,022 3/17/2005 23.26 32,202 3/18/2005 22.35 29,824 3/19/2005 23.27 32,216 3/20/2005 24.04 34.485 3/21/2005 24.22 29.491 3/22/2005 24 35,829 3/23/2005 23.89 31,480 3/24/2005 23.93 44,106 3/25/2005 24.64 38,634 3/26/2005 25.21 36,163 3/27/2005 26.01 35,142 3/28/2005 27.11 34,367 3/29/2005 25.92 37,398 3/30/2005 25.63 63,485 3/31/2005 25.78 40,206 4/l/2005 25.96 33,992 4/2/2005 26.87 37.200 4/3/2005 25.26 39,816 4/4/2005 25.87 61,275 4/5/2005 23.03 62,615 4/6/2005 24.63 29,169 477/2005 25.35 25,793 4/8/2005 27.53 22,501 4/9/2005 28.06 25,976 4/10/2005 26.81 54,110 4/11/2005 25.85 38.590 4/12/2005 26.78 38,639 4/13/2005 24.61 34,071 4/14/2005 24.74 33,219 4/15/2005 23.84 43,344 4/16/2005 23.45 35,594 4/17/2005 23.38 33,928 4/18/2005 23.71 39,153 4/19/2005 23.64 29,574 4/20/2005 22.94 26,402 4/21/2005 23.47 28,187 4/22/2005 24.51 28,822 4/23/2005 24.85 27,357 4/24/2005 23.84 26,046 4/25/2005 23.15 33,980 4/26/2005 23.64 34,897 4/27/2005 23.32 33,452 4/28/2005 24.75 33.026 4/29/2005 24.59 36.709 4/30/2005 24.36 32,506 Subtotal Ibs 2,165,9781 Date Flow m d Color Ibs/da 5/l/2005 23.43 32,242 5/2/2005 24.54 42,161 5/3/2005 24.61 37,355 5/4/2005 24.58 34,440 5/5/2005 24.68 57,221 5/6/2005 24.44 43,823 5/7/2005 24.36 35,960 5/8/2005 24.8 35,989 5/9/2005 25.38 34,290 5/110/2005 26.43 27,774 5/11/2005 24.09 28.328 5/12/2005 24.96 52,458 5/13/2005 25.29 47,246 5/14/2005 23.95 33,557 5/15/2005 24.54 48,505 5/16/2005 24.38 40,259 5/17/2005 24.44 41,785 5/18/2005 24.37 48,779 5/19/2005 25.92 36,966 5/20/2005 28.31 38,721 5/21/2005 25.96 27,496 5/22/2005 24.73 28,050 5/23/2005 24.35 40,413 5/24/2005 24.54 46,663 5/25/2005 23.2 40,052 5/26/2005 22.34 35,959 5/27/2005 23.23 38,360 5/28/2005 23.05 29,989 5/29/2005 23.76 29,724 5/30/2005 23.81 27,801 5/31/2005 24.11 36,194 6/1/2005 26.72 41,449 6/2/2005 25.97 31,189 6/3/2005 25.73 23,390 6/4/2005 26.26 57,599 6/5/2005 24.98 34,792 6/6/2005. 25.84 41,162 6/7/2005 25.02 35,682 6/8/2005 25.03 33,609 6/9/2005 25.72 29,602 6/10/2005 25.42 29,256 6/11/2005 24.81 25,864 6/12/2005 26.65 27,116 6/13/2005 27.05 35,419 6/14/2005 24.59 39,786 6/15/2005 23.96 38,766 6/16/2005 27.28 43,000 6/17/2005 25.56 45,405 6/18/2005 25.18 45,780 6/19/2005 25.69 44,565 5/20/2005 24.41 38,680 5/21/2005 23.86 37,013 6/22/2005 23.52 39,428 6/23/2005 23.77 35,684 5/24/2005 24.05 42,522 5/25/2005 24.46 41,819 5/26/2005 25.41 44,927 5/27/2005 27.06 45,813 5/28/2005 27.77 44,004 "0/29/2005 26.51 83,131 3/30/2005 24.44 54,626 Subtotal Ibs 2,389.637 2005colorcalc, 2005 Daily Color data Pagel of 2 Printed 1/4/2006 2005 Discharge Color Data, continued NPDES Permit No. NC0000272 Date Flow m d Color Ibs/da 7/1/2005 25.12 46,090 7/2/2005 24.14 53,352 7/3/2005 26.34 43,935 7/4/2005 26.28 43,616 7/5/2005 25.24 34,312 7/6/2005 25.13 37,935 7(7/2005 29.48 43,764 7/8/2005 27.75 38,418 7/9/2005 26.48 41,298 7/10/2005 24.88 46,065 7/11/2005 26.22 47,890 7/12/2005 25.86 45,291 7/13/2005 25.8 45,186 7/14/2005 25.63 45,743 7/15/2005 25.84 51,290 7/16/2005 23.78 38,872 7/17/2005 23.88 31,865 7/18/2005 24.09 35,360 7/19/2005 25.47 41,422 7/20/2005 26.71 40,765 7/21/2005 26.56 40,758 712PJ2005 24.29 33,020 7/23/2005 22.87 30,899 7/24/2005 22.81 35,954 7/25/2005 23.76 36,857 7/26/2005 24.93 41,999 7/27/2005 25.56 57,556 7/28/2005 26.22 41,986 7/29/2005 26.06 41,729 7/30/2005 25.95 41,120 7/31/2005 25.29 35,856 8/1/2005 24.37 26,015 8/2/2005 24.81 31,244 8/3/2005 25.61 38,873 8/4/2005 24.36 38,195 8/5/2005 24.89 37,572 8/6/2005 24.85 31,916 8/7/2005 27.35 31,706 8/8/2005 27.41 33,833 819/2005 26.76 23,657 8/10/2005 26.11 33,535 8/11/2005 24.32 35,901 8/12/2005 24.47 38,367 8/13/2005 25.32 47,302 8/14/2005 24.81 57,316 8/15/2005 25.36 46,108 8/16/2005 25.97 44,184 8/17/2005 24.05 37,708 8/18/2005 30.8 53,429 8/19/2005 28.04 70,156 8/20/2005 26.69 54,313 8/21/2005 20.396 66,680 8/22/2005 27.9 90,515 8/23/2005 28.59 75,824 8/24/2005 26.81 50,980 8/25/2005 26.13 52,084 8/26/2005 25.5 48,914 8/27/2005 25.36 50,761 8/28/2005 25.61 43,785 8/29/2005 26.43 50,257 8/30/2005 31.12 45,160 8/31/2005 27.29 34,823 Subtotal Ibs 2,71 318 Total color discharge, Ibs 14,272,574 Date Flow m d Color Ibs/da 9/1/2005 24.99 30,429 9/2/2005 24.75 36,123 9/3/2005 23.62 27,382 9/4/2005 24.36 25,598 9/5/2005 25.44 26,733 9/6/2005 25.71 22,300 9/7/2005 26.19 26,211 9/8/2005 26.16 28,363 9/9/2005 26.32 34,682 9/10/2005 25.1 24,701 9/11/2005 26.15 44.054 9/12/2005 25.36 36,801 9/13/2005 24.01 27.834 9/14/2005 24.54 29,062 9/15/2005 25.34 31,278 9/16/2005 26.56 36,992 9/17/2005 24.91 34,279 9/18/2005 25 26,271 9/19/2005 26.24 27.674 9/20/2005 27.71 38.825 9/21/2005 26.06 33,470 9/22/2005 27.03 31,560 9/23/2005 25.96 30,744 9/24/2005 25.81 38,961 9/25/2005 26.31 39,058 9/26/2005 26.68 41,387 9/27/2005 26.05 39,106 9/28/2005 25.74 30,054 9/29/2005 26.5 35,362 9/30/2005 25.73 41,630 10/1/2005 27.87 46,952 10/2/2005 26.76 37,717 1002005 26.3 29,831 10/4/2005 22.47 48,724 10/5/2005 27.07 88,499 10/6/2005 26.75 33,241 10/7/2005 27.61 31,777 10/8/2005 27.97 45,954 10/9/2005 27.9 42,349 10/10/2005 26.07 60,879 10/11/2005 28.95 71,226 10/12/2005 27.45 40,292 10/13/2005 27.03 28,855 10/14/2005 27.34 25,538 10/15/2005 27.37 42,001 10/16/2005 26.09 36,120 10/17/2005 26.59 36,812 10/18/2005 22.37 36,194 10/19/2005 28.52 44,241 10/20/2005 28.69 37,327 10/21/2005 29.84 32,601 10/22/2005 27.02 31.098 10/23/2005 26.2 37,583 10/24/2005 26.54 38,514 10/25/2005 27.07 34,090 10/26/2005 26.49 40,209 10/27/2005 26.06 35,209 10/28/2005 26.21 33,663 10/29/2005 26.57 39,001 10/30/2005 26.88 41,922 10/31/2005 27.35 42,198 Subtotal Ibs 2.247 442 Days in 2005 365 2005colorcalc, 2005 Daily Color data Page2 of 2 Date Flow m d Color Ibs/da 11/1/2005 25.58 45,441 11/2/2005 26.39 29,272 11/3/2005 27.65 74,715 11/4/2005 26.73 62,420 11/5/2005 27.11 43,411 11/6/2005 27.11 33,010 11/7/2005 27.38 35,166 11/8/2005 27.36 37,422 11/9/2005 28.04 33,675 11/10/2005 27.7 30,956 11/11/2005 27.49 27,053 11/12/2005 27.46 24,276 11/13/2005 27.44 33,183 11/14/2005 27.17 53,477 11/15/2005 27.46 41,223 11/16/2005 27.05 33,388 11/17/2005 27.28 41,863 11/18/2005 26.78 43,106 11/19/2005 27.12 34,153 11/20/2005 27.07 30,478 11/21/2006 28.64 37,262 11/22/2005 27.36 31,946 11/23/2005 27.78 37,996 11/24/2005 27.74 31,927 11/25/2005 26.34 33,391 11/26/2005 26.56 37,657 11/27/2005 28.26 37,474 11/28/2005 27.57 26,212 11/29/2005 29.93 41,936 11/30/2005 26.3 39,482 12/1/2005 26.37 36,288 12/2/2005 26.37 47,944 12/3/2005 26.86 43,010 12/4/2005 27.39 38,834 12/5/2005 28.16 32,410 12/6/2005 27 34,678 12/7/2005 26.26 37,888 12/8/2005 26.07 38,267 12/9/2005 27.62 26,260 12/10/2005 26.54 30,324 12/11/2005 26.45 37,721 12/12/2005 26.51 35,596 12/13/2005 26.23 37,626 12/14/2005 25.74 33,489 12/15/2005 29.86 37,853 12/16/2005 27.95 29,837 12/17/2005 26.14 27,469 12/18/2005 25.47 39,935 12/19/2005 25.81 37,024 12/20/2005 25.57 37,106 12/21/2005 24.9 23,259 12/22/2005 26.44 17,420 12/23/2005 26.98 32,627 12/24/2005 27.01 28,834 12/25/2005 26.78 37,745 12/26/2005 26.37 34,748 12/27/2005 25.81 48,002 12/28/2005 26.17 43,870 1PJ29/2005 26 39,465 12/30/2005 25.4 32,623 12/31/2005 24.99 26,886 Subtotal Ibs 2.2 007 Annual Average Color, Ibs/day 39,103 Printed 1/4/2006 BLUE RIDGE PAPER PRODUCTS INC. 30 November 2005 Mr. Alan W. Klimek, P.E. Director Division of Water Quality North Carolina Department of Environment and Natural Resources 1617 Mail Service Center Raleigh, NC 27699-1617 Certified Mail Return Receipt Requested 7099 3220 0007 0371 5900 DEC - 1 Subject: Effluent Color Performance Following Highest Certainty and Reasonable Certainty Actions NPDES Permit No. NC0000272 Blue Ridge Paper Products Inc. Canton, North Carolina Dear Mr. Klimek: Enclosed are two (2) copies of the subject report in accordance with Part I, Condition A.(8.), Paragraph 8 of the December 2001 NPDES permit. With this report Blue Ridge Paper has completed Highest Certainty, Reasonable Certainty, and Lowest Certainty actions for color reduction identified in the NPDES permit. The report also documents on -going mill -identified color reduction initiatives. 0 The Blue Ridge Paper Canton Mill is committed to continued color performance improvement and recommends an annual average secondary effluent true color limit of 39,000 pounds per day and a monthly average true color effluent limit of 52,000 pounds per day. Based on recent color performance and color -related projects underway, we believe that these limits are technically, economically and operationally feasible. Please contact us if you have any questions. Sincerely, Paul S. Dickens Robert V. Williams Manager, Environmental Affairs Director, Regulatory Affairs 828-646-6141 828-646-2033 dickep@bluerideepaper.com willib@bluerideepaper.com Environmental Group 175 Main Street • PO Box 4000 Canton, North Carolina 28716. 828-646-2000 Raising Your Expectations Mr. Alan W. Klimek, NC DENR DWQ 30 November 2005, Page 2 Enclosure: Effluent Color Performance Following Highest Certainty and Reasonable Certainty Actions cc: (w/ encl): Dave A. Goodrich Environmental Supervisor Point Source Branch Division of Water Quality North Carolina Department of Environment and Natural Resources 1617 Mail Service Center Raleigh, NC 27699-1617 Roger Edwards Surface Water Protection Supervisor Division of Water Quality North Carolina Department of Environment and Natural Resources Asheville Regional Office 2090 US Highway 70 Swannanoa, North Carolina 28778 Keith Haynes Environmental Specialist Division of Water Quality North Carolina Department of Environment and Natural Resources Asheville Regional Office 2090 US Highway 70 Swannanoa, North Carolina 28778 Don Anderson US Environmental Protection Agency Office of Water Office of Science and Technology (4301 T) 1200 Pennsylvania Avenue, NW Washington, DC 20460 Sergei Chemikov Environmental Engineer I Division of Water Quality North Carolina Department of Environment and Natural Resources 1617 Mail Service Center Raleigh, NC 27699-1617 Environmental Group 175 Main Street • PO Box 4000 Canton, North Carolina 28716. 828-646-2000 Raising Your Expectations Mr. Alan W. Klimek, NC DENR DWQ 30 November 2005, Page 3 Internal Distribution: C. File Water Engr File — NPDES Color Reports B. Shanahan J. Clary M. Ferguson K. Hennessy D. Brown R. Medford C. Dowdle D. Cherry J. Pryately L. Cooper Environmental Group 175 Main Street • PO Box 4000 Canton, North Carolina 28716 • 828-646-2000 Raising Your Expectations BLUE MIDGE PAPER PRODUCTS INC. Blue Ridge Paper Products Inc. Canton Mi11, Canton, North Carolina NPDES No. NC 0000272 Effluent Color Performance Following Highest Certainty ana Reasonable Certainty Actions Update on Mill -Identified Color Reduction Initiatives December 2005 December 2005 Effluent Color Report, BRPP Canton Mill Page i Executive Summary This report documents the ability of the Blue Ridge Paper Products Inc., Canton Mill to attain annual average and monthly average color limits following Highest Certainty and Reasonable Certainty actions identified in the December 2001 NPDES permit. The report is submitted to satisfy requirements of Part I, Section A.(8.), Paragraph 8 of the permit. "...By December 1, 2005, the permittee shall submit, as related to implementation of the process improvements evaluated according to Paragraph 7, a statistical analysis of Blue Ridge Paper's effluent quality performance. This report shall include a statistical analysis of the Blue Ridge Paper's monthly average and annual average color discharge, mill performance as related to color, and all available data necessary to derive the lowest achievable annual average and monthly average color loading limits...." Based on the Canton Mill's performance from December 2003 through September 2005 and the mill's continued commitment to color improvement, Blue Ridge Paper believes that an annual average secondary effluent true color limit of 39,000 pounds per day and a monthly average secondary effluent true color limit of 52,000 pounds per day are technically, economically and operationally feasible. Dec 2005 Color Report Final.doc December 2005 Effluent Color Report, BRPP Canton Mill Page ii Table of Contents ExecutiveSummary......................................................................................................................... i Introduction..................................................................................................................................... 1 Purpose........................................................................................:............................................... 1 PermitRequirement.................................................................................................................... 1 Previous Color Limits, Evaluations and Reports........................................................................ 1 Blue Ridge Paper Color Reduction Initiatives................................................................................ 2 Hardwood Fiberline Six Sigma Team......................................................................................... 2 Pine Brown Recovery Transfer Line.......................................................................................... 3 Milkof Lime............................................................................................................................... 3 Pine and Hardwood Quaternary Screen Rejects Press................................................................ 3 GreenLiquor Sump..................................................................................................................... 4 AcidSewer Rerouting................................................................................................................. 4 Color Process Improvement Six Sigma Team............................................................................ 5 ColorReliability Projects............................................................................................................ 5 Statistical Analysis of Color Data .............................................. Summary and Recommendation. ...I .................... 5 ..................................... 6 Attachment I: Color Reduction Initiatives Under 2001 NPDES Permit, December 2005 Dec 2005 Color Report Final.doc December 2005 Effluent Color Report, BRPP Canton Mill Page 1 Introduction Purpose This report documents the ability of the Blue Ridge Paper Products Inc., Canton Mill to attain annual average and monthly average color limits following Highest Certainty and Reasonable Certainty actions identified in the December 2001 NPDES permit. The report also documents recent mill -identified color reduction initiatives. Permit Requirement The requirement of the 2001 NPDES permit for this report is specified in Section A.(8.), Paragraph 8: "By December 1, 2005, the permittee shall submit, as related to implementation of the process improvements evaluated according to Paragraph 7, a statistical analysis of Blue Ridge Paper's effluent quality performance. This report shall include a statistical analysis of the Blue Ridge Paper's monthly average and annual average color discharge, mill performance as related to color, and all available data necessary to derive the lowest achievable annual average and monthly average color loading limits. By February 1, 2006, the Division of Water Quality (in consultation with the Technology Review Workgroup) shall recommend to the NPDES Committee, considering the statistical analysis report submitted by the permittee and the demonstrated performance of the mill, the lowest achievable average and monthly average color loading effluent limitations. If the limits determined to be achievable are within or below the range of 32, 000 to 39, 000 lbs per day as an annual average, the limits shall become effective March 1, 2006, by written notification from the Director. If the limits determined to be achievable by the Division of Water Quality (in consultation with the Technology Review Workgroup) are above, the target range, the Permit shall be modified in accordance with North Carolina's permitting process to reflect those limits. " Previous Color Limits, Evaluations and Reports Effluent color limits in Part I, Section A (8), Paragraph 2 of the December 2001 NDPES are as follows: "The average annual discharge of true color for each calendar month shall not exceed 48,000 pounds per day. The monthly average effluent true color loading shall not exceed 55,000 pounds per day. For the purpose of this permit/variance only, `pounds of true color' is calculated by the following equation: Eff cent flow (mgd) x Effluent True Color ([ppm, siclPlatinum Cobalt Units) x 8.34" The 2001 NPDES permit also established a series of actions and reports related to color reduction at the Blue Ridge Paper Canton Mill. "Highest Certainty" actions were projects Dec 2005 Color Report Final.doc December 2005 Effluent Color Report, BRPP Canton Mill Page 2 identified by Blue Ridge Paper and the Technology Review Workgroup (TRW) as technically, economically and operationally feasible. These projects were implemented during 2002 and 2003. Canton Mill effluent color performance following implementation of the Highest Certainty projects was documented in the October 2003 Color Report required under Part I, Section A (8), Paragraph 5 of the NPDES permit. "Reasonable Certainty" actions were projects identified by the TRW with possible application to the Canton Mill. Blue Ridge Paper completed evaluation of the technical, economic and operational feasibility of Reasonable Certainty actions during 2002 and 2003. Results were documented in the December 2003 Color Report required under Part I, Section A (8), Paragraph 7 of the NPDES permit. None of the Reasonable Certainty actions were deemed feasible. However, based on mill performance with Highest Certainty actions and other initiatives, Blue Ridge Paper recommended an annual average color limit of 42,000 pounds per day. In addition, the Mill voluntarily accepted a reduced monthly average color limit of 52,000 pounds per day. The Division of Water Quality (DWQ) revised the NPDES permit for these limits on February 27, 2004. "Lowest Certainty" actions involve possible technologies to treat or eliminate the Chloride Removal Process (CRP) wastestream. Part I, Section A (8), Paragraph 9 of the NPDES permit specified several specific technologies for evaluation including land application, commercial incineration, coagulation / precipitation and solidification for land disposal. Blue Ridge Paper identified and evaluated several other possible technologies including ozone and chlorine dioxide bleaching. However, based on engineering evaluation and/or bench and pilot scale testing, no feasible Lowest Certainty actions were found. These results were reported in the March 2005 CRP Color Reduction Technology Assessment Report. The CRP Report was originally due in December 2004, but the DWQ granted a 3-month extension following floods that affected the Canton Mill in September 2004. I Blue Ridge Paper Color Reduction Initiatives Attachment I outlines major color reduction initiatives at the Blue Ridge Paper Canton Mill under the 2001 NPDES permit. As of December 2005, Blue Ridge Paper has completed NPDES requirements related to Highest Certainty, Reasonable Certainty and Lowest Certainty actions for color reduction. The Canton Mill has undertaken other color initiatives beyond those specified in the NPDES permit. These are included in Attachment I. Mill -identified color projects not included in previous permit -required color reports are documented in sections below. Hardwood Fiberline Six Sigma Team The October and December 2003 Color Reports identified hardwood frberline washing as a statistically significant contributor to secondary effluent color. A Six Sigma team was chartered in spring of 2004 to evaluate opportunities to decrease hardwood color through improved hardwood brownstock washing and process control. The team looked at process procedures, Dec 2005 Color Report Final.doc December 2005 Effluent Color Report, BRPP Canton Mill Page 3 operating practices and process control parameters to understand their effect on process reliability and color. A new operating strategy was implemented including new performance metrics and tracking. The team also identified opportunities to improve brown stock washing through shower bar adjustments and replacements. New design shower bars were recently installed on the Number 1 Hardwood Brownstock Washer. A performance evaluation of the new shower bar design is underway. Shower bar replacements on additional fiberline washers may be considered during 2006. Pine Brown Recovery Transfer Line This project was introduced in the December 2003 Color Report. The Pine Brown Recovery Transfer Line was completed during the Spring 2004 semi-annual outage. The project provided a transfer pipeline between the Pine Brown Spill Tank and the Hardwood Blow Tower. The transfer pipeline increases the effective recovery volume of the Pine Brown Spill System by allowing excess color materials from the pine fiberline to be pumped into the hardwood fiberline for recovery. This extra recovery volume is used during maintenance outages and other events to improve overall capture and recovery of color materials that otherwise would not be reclaimed. The estimated annual average secondary effluent color reduction from the Pine Brown Recovery Transfer line is 500 pounds per day. Milk of Lime This project was included in the May 2004 Supplement to the December 2003 Color Report. During Spring of 2004, Blue Ridge Paper conducted a full-scale trial on the color reduction effect of adding a continuous slurry of hydrated lime to the mill sewer system prior to wastewater treatment. This "milk of lime" provides calcium, which in bench scale studies was effective in removing brown color. Milk of lime addition produced a reduction in primary influent color. However, there was no statistically significant reduction in secondary effluent color associated with milk of lime. hi addition, milk of lime addition has adverse effects on sludge dewatering and wastewater sludge volume. Based on the dose rate and cost, milk of lime is not an economically or operationally feasible technology for color reduction. Pine and Hardwood Quaternary Screen Rejects Press This project was introduced in the December 2003 Color Report and was implemented during 2004. The Pine and Hardwood Screening Systems follow brownstock washing and remove shives and undigested pulp from brownstock fiber before bleaching. The screen reject flow includes a sizable volume of filtrate that contains dissolved color materials. The Quaternary Screen Reject Presses allow separation of the rejects and filtrate so that color materials in the filtrate can be reclaimed. During summer of 2004, Blue Ridge Paper worked with a specialty equipment vendor to fabricate, install and test prototype mechanical screw presses on the reject drains for the hardwood and pine quaternary screens. After pressing, the reject filtrates are returned to brownstock filtrate tanks. The dewatered rejects are burned in the Canton Mill bark Dec 2005 Color Report Final.doc December 2005 Effluent Color Report, BRPP Canton Mill Page 4 boiler. The prototype screw presses were successful, and permanent units were purchased and installed in the fall of 2004. Based on monitoring during trials of the Quaternary Screen Reject Presses, color reduction is approximately 1000 pounds per day. Blue Ridge Paper is working with the equipment manufacturer to improve reliability and uptime for the Quaternary Screen Reject Presses. The Blue Ridge Paper installation on the quaternary screen rejects is the first application of its kind for screw press equipment. Green Liquor Sump This Green Liquor Sump project was introduced in the May 2004 Supplement to the December 2003 Color Report. The project was completed in August 2005. The Green Liquor sump allows segregation of green liquor from black liquor recovery sumps in the recovery furnace area. This segregation is important to in -mill color control because green liquor contamination of black liquor materials prevents their capture and recovery. The green liquor is corrosive to evaporators and other chemical recovery cycle equipment. The estimated annual average secondary effluent color reduction from the Green Liquor Sump is 500 pounds per day. Acid Sewer Rerouting As documented in the October 2003 Color Report, unaccounted color has become a larger percentage of mill sewer color as Blue Ridge Paper has successfully reduced brown color discharges to wastewater treatment. Unaccounted color is calculated as the difference between measured primary influent color in pounds per day and the sum of color measured in mull sewers upstream of wastewater treatment. Unaccounted color is primarily the result of sewer -generated color that occurs when acid bleach plant filtrates are exposed to alkaline conditions in the mill sewer and primary clarifiers. Sewer generated color consists of dissolved color materials and is not effectively removed by filtration and conventional coagulation and precipitation technology. The current acid sewer at the Blue Ridge Paper Canton Mill mixes with the alkaline mill sewer at the 4A manhole upstream of primary treatment. This configuration creates conditions that may contribute to sewer generated color. To minimize the creation of sewer generated color, it is desirable to keep acid bleach plant filtrates away from alkaline pH conditions. A project was engineered during early 2005 to reroute acid bleach filtrates directly to the primary clarifiers downstream of initial pH adjustment for the alkaline mill sewer. With rerouting, the acid filtrates will see a neutral pH range of 6 to 9 when mixed with other mill wastewaters for treatment. The design allows the bleach plant filtrates to mix with either primary influent or primary effluent wastewater prior to secondary treatment. The Acid Sewer Project was constructed during summer and fall of 2005 and will go into full operation in early 2006. Startup testing is scheduled for December 2005. Dec 2005 Color Report Final.doc December 2005 Effluent Color Report, BRPP Canton Mill Page 5 Blue Ridge Paper believes the Acid Sewer Project will achieve reduction in sewer generated color. The reduction in secondary effluent color, however, is difficult to predict. The Acid Sewer Project is a full-scale trial in terms of secondary effluent color reduction. Color Process Improvement Six Sigma Team As a result of color reduction projects implemented under the 2001 NPDES permit, secondary effluent color from the Blue Ridge Paper Canton Mill for the period January through September 2005 averaged 39,465 pounds per day. This average includes several months of color performance in the range of 32,000 to 38,000 pounds per day and several months of color performance in the range of 41,000 to 46,000 pounds per day. This variability in monthly color performance is a result of maintenance outages and normal process variability. Reducing the variability of color performance is the next color reduction challenge for the Blue Ridge Paper. A Six Sigma Team was chartered in September 2005 to examine the primary operating conditions associated with periods of lowest color performance. Color Reliability Projects In addition to the Color Process Improvement Team, Blue Ridge Paper will dedicate capital in 2006 to improve the reliability of processes that have a demonstrated impact on color performance. These capital projects will focus on pulp washing efficiency, engineering controls to improve early detection of process upsets that may release color, and further mechanical reliability improvements to the Bleach Filtrate Recyclinem (BFR) process. Engineering design of the Color Reliability Projects is underway with implementation planned during the first half of 2006. The 2006 Color Reliability Projects are included in Attachment I. 1 Statistical Analysis of Color Data The average daily secondary effluent true color from the Blue Ridge Paper Canton Mill for the period December 2003 through September 2005 - excluding the period of mill outage and restart in September and October 2004 due to Hurricanes Frances and Ivan — is 39,548 pounds per day. The upper 95 percent confidence interval for the average of this period is 40,280 pounds per day. The average monthly secondary effluent color for the period December 2003 through September 2005 — excluding the flood -affected months - is 39,545 pounds per day. The upper 95 percent confidence interval for monthly average color is 41,350 pounds per day. The maximum monthly average color during this period occurred in August 2005 at 45,842 pounds per day. If the flood -affected months of September and October 2004 are included, the maximum monthly average color occurred in October 2004 at 59,539 pounds per day. Dec 2005 Color Report Final.doc December 2005 Effluent Color Report, BRPP Canton Mill Page 6 Summary and Recommendation Blue Ridge Paper Products Inc. has completed Highest Certainty, Reasonable Certainty and Lowest Certainty actions for color reduction identified in the December 2001 NPDES permit. The mill has also identified, evaluated and implemented other initiatives for color reduction. Several of these mill -identified projects are underway and will be completed during 2006. The Blue Ridge Paper Canton Mill is committed to continued color performance improvement . and recommends an annual average secondary effluent true color limit of 39,000 pounds per day and a monthly average true color effluent limit of 52,000 pounds per day. Based on recent color performance and color -related projects underway, we believe that these limits are technically, economically and operationally feasible. Dec 2005 Color Report Final.doc Attachment I - Color Reduction Initiatives Under 2001 NPDES Permit, December 2005 Update Blue Ridge Paper Products Inc. - Canton Mill Color Reduction Measure ------------► ------------- - '' ------------► ------------► ------------► -----------♦ -----------* ------------ ------------- ------------- ------------- -------------- ------------- -------------- ----------- ------------- _____________ 204 2004 2006 1 2-Hour Color Testing 2 Lieber out Recommendations Implemented - _. ------------ ------------ ------------ -------------10 -------------- -------------- -------------- ------------ ----------- ----------- ______________ .. ... ►_ --------'- -------------- -------------- ______________ _ ► --- ____________� .. .. a „ , 3 Use of Off-line Clarifier for Spill Diversion 4 Hwd Brown Recovery Tank Line to Pine Blow Tower 5 1-Hour color testing before and during maintenance outages 6 Installation of Mechanical Seals clean water segregation) 7 Ira rovement of equipment used for handling Pine and Hardwood Knot Rejects 8 S 1.5MM spent on Bleach Filtrate Recycle Improvements 9 1 Installed Pine Brownstock Control Logic improvements 10 Determined multiple contributors and interaction effects causing Sewer Generated Color I I Bench -scale sewer -generated color work ------------ -------------- ------------- ------------- -------------- ---------- ______________ 12 Hardwood Fiberline Six Sigma Team for process optimization and color improvements 13 Improvements made to Pine Brownstock sumps for better recovery 14 White Rot Fungus Trial - growth efforts unsuccessful, may revisit in future IS Pine Brown Recovery Tank Line to Hwd Blow Tower 16 Milk of Lime Trial not successful, no statistically significant SE color reduction 17 Pine and Hardwood Quaternary Screen Rejects Press (eliminate quaternary screen rejects discharge to sewer, recover filtrate and chives 18 Trial to confirm and size system for C102 de-colorization of CRP/evaluate full-scale application (trials completed after Sep 04 floods, not economically, technically or operationally feasible 19 20 Green Liquor Sump at recovery furnaces (implementation delayed by Sep 2004 floods, completed Aug 2005► Acid Sewer Rerouting - improved segregation of bleach plant filtrates from akaline wastewaters to reduce sewer generated color 21 Color Process Improvement Six Sigma Team to examine operating conditions associated with good color performance 22 2006 Color Reliability Projects - Pulp Washing Improvements (shower replacements and re -bleach internal recyclepump)------------ 23 2006 Color Reliability Projects - BRF Mechanical Improvements (MRP fiber detection and prevention) 24 2006 Color Reliability Projects - Recovery Process Improvements (piping changes and instrumentation)---' 25 2006 Color Reliability Projects - Color Monitoring Improvement (relocated and reddndant instrumentation -""' - Completed Process Change / Evaluation Process Evaluation or Change NNNNM Continued Performance Improvement awnumm Expected Performance Improvement s, BLUE RIDGE PAPER PRODUCTS INC. February 24, 2006 Mr. D. Keith Haynes North Carolina Department of Environment and Natural Resources Division of Water Quality 2090 U.S. Highway 70 Swannanoa, NC 28778 FEB J f� 7 2 I 2006 L SEC ioN � ,NPL OFPICE� CERTIFIED MAIL RETURN RECEIPT REQUESTED 7099 3220 0007 0371 6150 Re: NPDES NO. NC0000272 Certification in Lieu of Monitoring for Chloroform — Process Parameter Exceedance Blue Ridge Paper Products, Inc. Canton, NC In accordance with NPDES Permit No. NC0000272 and 40 CFR 430.02(f)(6)(i)(A), Blue Ridge Paper Products is hereby notifying the Division of Water Quality (DWQ) of a process parameter exceedance on the pine fiberline that occurred on January 30, 2006. As approved by the DWQ on August 16, 2005 Blue Ridge monitors certain process parameters (pH of the first C102 bleaching stage, kappa factor of the first CI02 bleaching stage, and total bleach line C102 application rate) for its certification in lieu of monitoring for chloroform. In this case, the maximum allowable kappa factor of the first C102 stage for the pine fiberline was exceeded on January 30, 2006 (see Attachment 1). In accordance with 40 CFR 430.02(f)(6)(i)(B), Blue Ridge Paper Products is demonstrating compliance with the applicable chloroform standard by submitting the results of one sample taken from the pine fiberline effluent on February 6, 2006 (see Attachment II). Given that the results of the sample are well below permitted limits, Blue Ridge has resumed process monitoring in lieu of monitoring for chloroform as allowed for by NPDES Permit No. NC0000272. Blue Ridge has remained well below permitted limits for daily maximum and monthly average chloroform limitations required by NPDES permit No. NC0000272 and remains committed to continuous improvement in effluent quality. If you have any questions please don't hesitate to call. Sincerely, M�� J. Glenn Rogers Water Compliance Coordinator 828-646-2874 roqerq@blueridqel)aper.com John J. Pryately Wastewater Supervisor & Operator in Charge 828-646-6720 pryati @blueridaepaper.com Environmental Group 175 Main Street • PO Box 4000 Canton, North Carolina 28716 • 828-646-2000 Raising Your Expectations 24 February 2006, Page 2 Attachment I: Process Parameter Tracking Sheet Attachment II: Results Of Chloroform Testing Internal Distribution: C. File —Water B. Shanahan J. Clary P. Dickens D. Brown C. Dowdle L. Cooper Environmental Group 175 Main Street • PO Box 4000 Canton, North Carolina 28716 • 828-646-2000 Raising Your Expectations ATTACHMENT I: PROCESS PARAMETER TRACKING SHEET y5 a N N. N N N. m N N N N N A O O O O O O O O C OO OO OO O C C C O C C C C C O O O O O O O O O Q O N W yy m m pp�� {{yy NN O �' m t'1 m fV M m m m M t7 N t� m m m m t7 Cl tC Cl m m t'l W m W N CJ m (� m x� m m m Y m O Vp Y o m m m a r W In O m mm m o N V o W m o n Ol ry� yQ N YnI 0 YWl y m i0 y �O � t m N Q O N h N N y N t0 N N I[1 N ro� y t0 N m N p t0 n d tN0 � 9 9 H m N W W o m m N V N r N r N m N n N o N N m N r N m N m N m N n N W N m N n N m N o m o m N m o m O m m W W W a W m W li O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O n nni a vvi m uvi u� w e n�ma M t` N c4 N tV m s e � 6. m m o m m v m o m 0 m 0 m 0 m 0 m 0 m 0 m 0 m 0 m o m m m m m m m o m 0 m 0 m 0 m 0 m 0 m 0 m o m v m o m 0 0 0 o v o W v v o 0 0 0 0 0 0 v 0 v 0 0 a 0 o v v v v v a o 0 0 0 N - N� O m m--------------------- L L'IZL LLLL O q p w L L p Ea��a zz�9 o z o LIfL LLL 9 9 m V taLL � m m m p SmU E 3mV N a A N d F LIt LL m v g -2 c a -2 c xa LL xa V A m y O N m M � O LLLL LLL LL ATTACHMENT II: RESULTS OF CHLOROFORM TESTING Date: Bleach Filtrate Chloroform Calculations 1/30/2006 HW D-1 HW Eo Flow in mgd Concentration in mgA Lbs/day HW Total Pine D-1 Pine Eo Pine D-2 Pine Total 0.292839 0.000026 0.554264 0.847129 I 0.038 0.026 0.033 8.34 8.34 8.34 0.0928 0.0000 0.1525 0.2454 aceAnalytical® www.pacelabs.com. February 17. 2006 Mr. John Pryately Blue Ridge Paper Products, Inc P.O. Box 4000 175 Main Street Canton. NC 28716 RE: Lab Project Number: 92112825 Client Project ID: Chloroforms Dear Mr. Pryately: Pace Analytical Services, Inc. 9800 Kincey Avenue, Suite 100 Huntersville, NC28078 Phone: 704.875.9092 Fax 704.875.9091 Pace Analytical Services, Inc. 2225 Riverside Drive Asheville, NC28804 Phone., 828.254.7176 Fax: 828.252.4618 Enclosed are the analytical results for sample(s) received by the laboratory on February 7, 2006. Results reported herein conform to the most current NELAC standards, where applicable, unless otherwise narrated in the body of the report. Inorganic Wet Chemistry and Metals Analyses were performed at our Pace Asheville laboratory and Organic testing was performed at our Pace Charlotte laboratory unless otherwise footnoted. If you have any questions concerning this report please feel free to contact me. Si lorri.patton@pacelabs.com Project Manager Enclosures Asheville Certification IDs NO Wastewater 40 NO Drinking Water 37712 SC 99030 FL NELAP E87648 REPORT OF LABORATORY ANALYSISCharlotte s NOW stewaericatio12 t This report shall not be reproduced, except in full, NO Drinking Water 37706 without the written consent of Pace Analytical Services, Inc. SC 99006 " °"°"° FL NELAP E87627 ace Analytical www.pacelabs.com I Lab Sample No: 926620378 Client Sample ID: PINE 111-COMP Pace Analytical Services, Inc. 9800 Kincey Avenue, Suite 100 Nuntersville, NC 28078 Phone: 704.875.9092 Fax: 704.875.9091 Pace Analytical Services, Inc. 2225 Riverside Drive Asheville, NC 28804 Phone., 828.254.7176 Fax: 828.252.4618 Lab Project Number: 92112825 Client Project ID: Chloroforms Project Sample Number: 92112825-001 Date Collected: 02/06/06 02:15 Matrix: Water Date Received: 02/07/05 12:08 Parameters Results Units Report Limit . Analyzed By CAS No. Qual RegLmt GUMS Volatiles Volatile GUMS by 624 Method: EPA 624 Chloroform 38. ug/l 5.0 02/16/06 12:39 DLK 67-66-3 Toluene-d8 (S) 96 % 02/16/06 12:39 DLK 2037-26-5 4-Bromofluorobenzene (S) 94 X 02/16/06 12:39 DLK 460-00-4 1 Dibromofluoromethane (S) 101 X 02/16/06 12:39 DLK 1868-53.7 Date: 02/17/06 Asheville Certification IDs REPORT OF LABORATORY ANALYSIS NC Wastewater 40 This report shall not be reproduced, except in full, NC Drinking Water 37712 without the written consent of Pace Analytical Services, Inc. SC 99030 FL NELAP E87648 Page: 1 of a Charlotte Certification IDs NC Wastewater 12 NC Drinking Water 37706 SC 99006 FL NELAP E87627 Analytical www.pacelabs.com ' Lab Sample No: 926620386 Client Sample ID: PINE EO-COMP- Pace Analytical Services, Inc. 9800KinceyAvenue, Suite 100 Huntersville, NC 28078 Phone: 704.875.9092 Fax.- 704.875.9091 Pace Analytical Services, Inc. 2225 Riverside Drive Asheville, NC28804 Phone: 828.254.7176 Fax: 828.252.4618 Lab Project Number: 92112825 Client Project ID: Chloroforms Project Sample Number: 92112825-002 Date Collected: 02/06/06 02:10 Matrix: Water Date Received: 02/07/06 12:08 Parameters Results Units Report Limit Analyzed By CAS No. Dual ReaLmt GUMS Volatiles Volatile GUMS by 624 Method: EPA 624 Chloroform 26. ug/l 5.0 02/16/06 13:19 DLK 67-66-3 Toluene-d8 (S). 98 X 02/16/06 13:19 OLK 2037-26-5 4-Bromoflu6robenzene (S) 96 X 02/16/06 13:19 DLK 460-00-4 Dibromofluoromethane (S) 38 % 02/16/06 13:19 DLK 1868-53-7 1.2 Date: 02/17/06 Asheville Certification IDs REPORT OF LABORATORY ANALYSIS NC Wastewater 40 This report shall not be reproduced, except in full, NC Drinking Water 37712 SC 990309030 without the written consent of Pace Analytical Services, Inc. FL NELAP E87648 " Page: 2 of 9 Charlotte Certification IDs NC Wastewater 12 NC Drinking Water 37706 SC 99006 FL NELAP E87627 aceAnalXical° www.pacelabs.com Lab Sample No: 926620394 Client Sample ID: PINE D2-COMP. Pace Analytical Services, Inc. 9800 Kincey Avenue, Suite 100 Huntersville, NC 28078 Phone., 704.675.9092 Fax., 704.875.9091 Pace Analytical Services, Inc. 2225 Riverside Drive Asheville, NC28804 Phone., 828.254.7176 Fax, 828.252.4618 Lab Project Number: 92112825 Client Project ID: Chloroforms Project Sample Number: 92112825-003 Date Collected: 02/06/06 02:05 Matrix: Water Date Received: 02/07/06 12:08 Parameters Results Units Report Limit Analyzed By CAS No. Qual ReaLmt GUMS Volatiles Volatile GUMS by 624 Method: EPA 624 Chloroform 33. ug/l 5.0 02/16/06 12:59 DLK 67-66-3 Toluene-d8 (S)- 98 % 02/16/06 12:59 DLK 2037-26-5 4-Bromofluoro6enzene (S) 99 % 02/16/06 12:59 DLK 460-00-4 1 Dibromofluoromethane (S) 102 % 02/16/06 12:59 DLK 1868-53.7 Date: 02/17/06 Asheville Certification IDs NC Wastewater 40 NC Drinking Water 37712 SC 99030 FL NELAP E87648 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc. Y CCCOM Page: 3 of e Charlotte Certification IDs NC Wastewater 12 NC Drinking Water 37706 SC 99006 FL NELAP E87627 aceAnalytical www.pacelabs.com Lab Sample No: 926620402 Client Sample ID: TRIP BLANK -COMP Pace Analytical Services, Inc. 9800 Kincey Avenue, Suite 100 Huntersville, NC 28078 Phone: 704.875.9092 Fax: 704.875.9091 Pace Analytical Services, Inc. 2225 Riverside Drive Asheville, NC28804 Phone: 828.254.7176 Fax.- 828.252.4618 Lab Project Number: 92112825 Client Project ID: Chloroforms Project Sample Number: 92112825-004 Date Collected: 02/06/06 02:00 Matrix: Water Date Received: 02/07/06 12:08 Parameters Results Units Report Limit Analyzed By CAS No. Qual RegLmt GUMS Volatiles Volatile GUMS by-624 Method: EPA 624 Chloroform ND ug/l 5.0 02/16/06 12:00 DLK 67-66-3 Toluene-d8 (S) 101 % 02/16/06 12:00 DLK 2037-26-5 4-Bromoflu6robenzene (S) 98 % 02/16/06 12:00 DLK 460-00-4 1 Dibromofluoromethane (S) 102 % 02/16/06 12:00 DLK 1868-53-7 Date: 02/17/06 sheville Certification IDs NC Wastewater 40 NC Drinking Water 37712 Sc 99030 FL NELAP E87648 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc. `N p 1LCp„Q' Page: 4 of 8 Charlotte Certification IDs NC Wastewater 12 NC Drinking Water 37706 SC 99006 FL NELAP E87627 aceAnalytical www. pacelahs. com Pace Analytical Services, Inc. 9800 Kincey Avenue, Suite 100 Hunters ville, NC 28078 Phone: 704.875.9092 Fax: 704.875.9091 Pace Analytical Services, Inc. 2225 Riverside Drive Asheville, NC 28804 Phone: 828.254.7176 Fax: 828.252.4618 I Lab Project Number: 92112825 Client Project ID: Chloroforms PARAMETER FOOTNOTES Method 9071E modified to use ASE. All pH, Free Chlorine, Total Chlorine and Ferrous Iron analyses conducted outside of EPA recommended immediate hold time. Depending on the moisture content the PRLs can be elevated for all soil samples reported on a dry weight basis. 2-Chloroethyl vinyl ether has been shown to degrade in the presence of acid. ND Not detected at or above adjusted reporting limit NC Not Calculable J Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit MDL Adjusted Method Detection Limit (S) Surrogate Ell Sample was received by the laboratory without acid preservation as recommended by the US EPA. [21 Low surrogate recovery was confirmed as a matrix effect by a second analysis. Date: 02/17/06 sheville Certification IDs NC Wastewater 40 NC Drinking Water 37712 SC 99030 FL NELAP E87648 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc. Page: 5 of 8 Charlotte Certification IDs NC Wastewater 12 NC Drinking Water 37706 SC •99006 FL NELAP E87627 ace Analytical www.pacelabs.com Pace Analytical Services, Inc. 9800 Kincey Avenue, Suite 100 Nuntersville, NC28078 Phone: 704.875.9092 Fax., 704.875.9091 QUALITY CONTROL DATA Pace Analytical Services, Inc. 2225Riverside Drive Asheville, NC28804 Phone: 828.254.7176 Fax.- 828.252.4618 Lab Project Number: 92112825 Client Project ID: Chloroforms QC Batch: 149847 Analysis Method: EPA 624 QC Batch Method: EPA 624 Analysis Description: Volatile GC/MS by 624 Associated Lab Samples: 926620378 926620386 926620394 926620402 METHOD BLANK:, 926651084 Associated.Lab Samples: 926620378 926620386 926620394 926620402 Blank Reporting Parameter Units Result Limit Footnotes Chloroform ug/1 NO 5.0 Toluene-d8 (S) X 99 - 4-Bromofluorobenzene (S) % 97 Dibromofluoromethane (S) X 112 LABORATORY CONTROL SAMPLE: 926651092 Parameter )Chloroform Toluene-d8 (S) 4-Bromofluorobenzene (S) Dibromofluoromethane (S) MATRIX SPIKE: 926651118 Parameter Chloroform Toluene-d8 (S) 4-Bromofluorobenzene (S) Dibromofluoromethane (S) SAMPLE DUPLICATE: 926651100 Spike LCS Units Conc. Result ug/1 20.00 23.16 926626565 Units Result ug/1 2.818 Parameter Units Chloroform ug/l Date: 02/17/06 Asheville Certification IDs NC Wastewater 40 NC Drinking Water 37712 SC 99030 FL NELAP E87648 LCS X Rec Footnotes 116 99 101 104 Spike MS MS Conc. Result X Rec Footnotes 20.00 27.12 122 101 92 92 926620386 OUP Result Result RPD Footnotes 26.00 26.00 0 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc. `O •��CC py�' Page: 6 of e Charlotte Certification IDs NC Wastewater 12 NC Drinking Water 37706 SC 99006 FL NELAP E87627 Ira ce Analytical i www.pacelahs.conr SAMPLE DUPLICATE: 926651100 Parameter Units Toluene-d8 (S) X 4-Bromofluorobenzene (S) X Dibromofluoromethane (S) X Bate: 02/17/06 Asheville CertificationlDs NO Wastewater 40 NO Drinking Water 37712 SC 99030 FL NELAP E87648 Pace Analytical Services, Inc. 9800 Kincey Avenue, Suite 100 Huntersville, NO 28078 Phone: 704.875.9092 Fax: 704.875.9091 QUALITY CONTROL DATA 926620386 OUP Pace Analytical Services, Inc. 2225 Riverside Drive Asheville, NO 28804 Phone: 828.254.7176 Fax.' 828.252.4618 Lab Project Number: 92112825 Client Project ID: Chloroforms Result Result RPD Footnotes 98 96 96 98 38 36 1,2 REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except In full, without the written consent of Pace Analytical Services, Inc. Page: 7 of 8 Charlotte Certification IDs NO Wastewater 12 NO Drinking Water 37706 SC 99006 FL NELAP E87627 aceAnalytical www.pacelabs.com I DATA PARAMETER Pace Analytical Services, Inc. 9800 KinceyAvenue, Suite 100 Huntersville, NC 28078 Phone., 704.875.9092 Fax., 704.875.9091 Pace Analytical Services, Inc. 2225 Riverside Drive Asheville, NC28804 Phone., 828.254.7176 Fax., 828.252.4618 Lab Project Number: 92112825 Client Project ID: Chloroforms Consistent with EPA guidelines,`unrounded concentrations are displayed and have been used to calculate % Rec and RPD values. LCS(D) Laboratory Control Sample (Duplicate) MS(0) Matrix Spike (Duplicate) DUP Sample Duplicate ND Not detected at or above adjusted reporting limit NC Not Calculable J Estimated concentration above the adjusted method detection limit and below the adjusted reporting limit MDL Adjusted Method Detection Limit' RPD Relative Percent Difference (S) Surrogate Ill Low surrogate recovery was confirmed as a matrix effect by a second analysis. [2] Sample was received by the laboratory without acid preservation as recommended by the US EPA. Date: 02/17/06 Asheville Certification IDs REPORT OF LABORATORY ANALYSIS NC Wastewater 40 This report shall not be reproduced, except In full, NC Drinking Water 37712 without the written consent of Pace Analytical Services, Inc. SC 990309030 FL NELAP E87648 .«"" 04 e nnf Page: 8 of 8 Charlotte Certification Ills NC Wastewater 12 NC Drinking Water 37706 SC 99006 FL NELAP E87627