Loading...
HomeMy WebLinkAboutNC0006254_Correspondence from Blue Ridge Tissue_20140725iia .. " 'Blue Ridge ' July 25, 2014 Mr. Landon Davidson Water Quality Regional Operations Asheville Regional Office 2090 U.S. Highway 70 Swannanoa, NC 28778 RE: Blue Ridge Tissue Corporation — Effluent Treatment System Replacement Project. Dear Mr. Davidson, This letter is intended to give NCDENR Water Quality Division an overall view of Blue Ridge Tissue's proposed approach to addressing the Division's concerns about iron in groundwater on our property. This includes our request/recommendation on the post installation conditions that would allow for final resolution of this issue. Background: Blue Ridge Tissue, (BRT), currently operates an effluent treatment system that was installed in the 1960's. The system consists of two long narrow trenches in the ground, (referred to as fiber traps), and two ponds, (one aeration and one final settling). The fiber traps are unlined. The aeration pond shows evidence of having been lined at one time. The final settling pond, known as the polishing pond, shows no evidence of even' being lined. There is also an unused pond adjacent to the current aeration pond that has been out of service for the majority of the time the system has been in service. The system is currently operating within required permit parameters. In the last 12 months there have been two instances of upset that resulted in our monthly BOD average to exceed our permit limit. The due diligence that was conducted in 2009 by NPS Corporation, (parent of Blue Ridge Tissue), during their purchase of the property from Sealed Air Corporation, (parent of Omni Supply), revealed iron levels in the groundwater on site that exceeded the State of North Carolina groundwater standard. NCDENR believes that conditions created by the operation of the fiber traps is the cause of the high iron. Proposal: In an effort to fully and completely eliminate any potential cause of the high iron levels in the onsite groundwater and in order to support a significant increase in production and the expansion of the current facility operations, Blue Ridge Tissue proposes the complete closing of the current effluent treatment system and the installation of a completely new, engineered, above ground treatment system to handle the in ill's effluent. The preferred location for the new system is in the area where the polishing pond currently sits. (see attachment #1, 3D concept drawing, and attachment #2, overhead satellite view of the current system). Page I of 3 Blue Midge Tissue Corporation — Patterson Mill 1427 Yadkin River Road, Lenoir NC 28645 The first step in this project is to conduct a geotechnical study of the preferred location to confirm that the site will support the construction of a new system such as the one that has been proposed. Step #2: The polishing pond must be taken out of service in order to drain the pond, clean out any remaining residuals and prepare the site for construction of the new system. The residuals would be land applied per our current land application permit. An operating variance would be requested from NCDENR to allow for the polishing pond to be shut down and for effluent from the aeration pond to be directly discharged. See attachment #3, pounds per day BOD and TSS coming from the aeration pond over the last 13 months. A temporary final filtering process such as a Fuzzy Filter or geo-tube filter bag is being investigated as a way to improve aeration pond effluent quality if deemed necessary. Step #3#3: The complete new system, (as shown in attachment #1), would be installed and commissioned while the current system continued to operate as outline in Step #2 above. Step #4: Once the new system is completely operational and able to process all mill effluent within permit requirements, the current system would be shut down. The fiber traps, the aeration pond and the unused pond would all be dewatered either by allowing them to dry up or by pumping them out. Any water pumped from the fiber traps and ponds would be run through the new system for treatment. Then they would be properly cleaned out with the residuals being land applied. The current plan for final closing of the fiber traps and the ponds calls for the upper level of the system, where the fiber traps are dug into the ground, to be bulldozed down to the lower level and into the aeration and unused ponds. Additional fill, if needed, would be sourced onsite. The resulting large level area would be left with the proper grade and drainage for rainwater run-off. New system permitting_ At this point we do not anticipate the need to request any permit increases in daily loading of TSS, BOD, etc. However, we may need to request a modest increase in the permitted daily flow of discharge from the system to no more than 1,000,000 million gallons per day from the current 450,000 gallons per day limit. We would also seek to continue with our land application permit for handling the residuals. The actual annual volume of residuals has not yet been determined but is estimated to be 5000 — 6000 tons annually once the final phase of production capacity is reached. A change to the permit would be requested to accommodate this increase in volume. Page 2 of 3 Resolution: With this complete system replacement, BRT expects that what NCDENR believes to be the cause of high iron in the groundwater will be completely eliminated, (fiber traps cleaned out and closed). We also feel that by closing the entire current system, all possible suspicion of the aeration, polishing and unused ponds will be eliminated as well. The proposed new system will be constructed using modern methods and will be completely above ground. There will be no release of any process water into the soil and water table below. We are confident that with the complete closing of the current system and with the installation of the completely new system, the conditions NCDENR believes to result in high iron concentrations will by default be eliminated. We understand based on previous discussions with NCDENR that a No Further Action Required letter cannot be issued prior to our moving forward with the project. We also understand that the monitoring wells and ground water testing will still be required as previously instructed by NCDENR. However, before BRT commits to this major capital expense and subsequent facility wide upgrade, we request that a letter of understanding/agreement be provided by NCDENR that outlines the conditions that will result in the issue of a NFA letter after the new system is installed and fully operational. In this regard we propose the following conditions: 1. Monitoring will continue for 2 years after the current system is closed. 2. Iron levels will be deemed to be no longer impacted by the effluent treatment process on the site. 3. No further action would be required if levels of iron remain stable and do not increase after 2 years of testing. Based on these conditions, we specifically ask that NCDENR close the case and not require any further monitoring beyond the 2 year time period. We ask NCDENR to concur that the cause of the issue has been eliminated and that the iron levels will eventually return to natural levels if they have not within the 2 year timeframe. We appreciate your time and consideration as we work together on resolving this matter. Thank you and Best Regards, Dave Hallock X Vice President and General Manager Blue Ridge Tissue Corporation. Page 3 of 3 n i� 0 0 ffa N w N O BOD Obs/day} TSS (lbs/day) Notes. • Aeration data is BOD and TSS coming out of the aeration pond prior to the polishing pond stated in pounds per day. • Effluent data is BOD and TSS coming out of the polishing pond stated in pounds per day. This is the data that is reported to NCDENR monthly per our �'" discharge permit. • The overall averages for BOD and TSS during the entire 13 month period are basically at the allowable monthly average limits for the current permit, (177.5#/day BOD and 230#/day TSS). • BOD from the aeration pond would have exceeded our current monthly average permit limit four times, (Dec q '13, Jan'14, Feb'14 and April'14). • TSS from the aeration pond would have exceeded our current monthly average permit limit six times, (July '13, Aug'13, Dec'13, Jan'14, Feb'14, June 14). • When compared to the BOD and TSS limits of our pending/proposed new discharge permit, there would have been no limits exceeded at anytime during the entire 13 month period. DATE Aeration Effluent Aeration Effluent 7/2/2013 182 500 7/6/2013 141 75 7/9/2013 42 52 159 36 7/16/2013 49 46 197 51 7/23/2013 107 87 304 87 7/30/2013 45 40 243 73 8/6/2013 182 424 8/7/2013 57 131 8/13/2013 91 249 8/14/2013 53 80 8/20/2013 106 92 307 104 8/27/2013 75 38 192 91 9/3/2013 65 245 9/4/2013 34 87 9/10/2013 145 139 273 112 9/17/2013 150 47 154 84 9/24/2013 241 162 187 78 10/1/2013 187 210 133 91 10/8/2013 133 202 10/9/2013 7z 72 10/15/2013 708 113 237 87 10/22/2013 108 56 139 55 10/29/2013 190 75 173 67 11/5/2013 140 59 166 84 11/12/2013 128 175 206 90 11/19/2013 177 150 227 121 11/26/2013 185 155 213 133 12/3/2013 219 91 264 126 12/10/2013 144 100 371 147 12/17/2013 264 102 230 106 12/23/2013 307 321 12/31/2013 256 228 204 45 1/7/2014 317 291 220 97 1/14/2014 400 339 229 88 1/21/2014 271 239 292 79 1/28/2014 185 83 2/4/2014 353 2/5/2014 151 90 2/11/2014 245 97 237 70 2/18/2014 261 161 367 93 2/25/2014 262 187 311 109 3/5/2014 101 78 233 77 3/11/2014 227 120 185 71 3/18/2014 255 230 139 57 3/25/2014 285 256 118 82 4/l/2014 276 251 131 Al 4/9/2014 250 279 170 74 4/17/2014 83 161 197 105 4/22/2014 221 168 253 97 4/23/2014 95 116 4/28/2014 268 231 275 145 5/6/2014 163 140 238 128 5/13/2014 157 132 255 148 5/20/2014 83 98 173 91 5/28/2014 68 113 97 343 6/3/2014 194 150 216 111 6/10/2014 161 81 228 137 6/17/2014 134 92 296 147 6/24/2014 93 64 267 77 7/1/2014 57 38 208 76 7/8/2014 51 35 148 75 7/15/2014 85 45 145 64 Average 175 129 229 97 Decrease 46 132 Decrease 26% 58% h-rT 4e-H A^ Cly r # 3