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HomeMy WebLinkAboutNC0006254_Correspondence from Blue Ridge Tissue_20131121Mr. Brett Laverty Water Quality Section North Carolina Division of Water Resources - Asheville Regional Office 2090 U.S. Highway 70 Swannanoa, NC 28778 November 21, 2013 Subject: Blue Ridge Tissue and Sealed Air Joint Response Letter Fiber Trap Assessment and Monitoring Blue Ridge Tissue Corp. - Patterson Mill NPDES Permit NC 0006254 Caldwell County Dear Mr, Laverty; This letter is in response to your September 25, 2013 letter regarding the subject matter In February 2011, a background monitoring well MW-1 was installed to establish background total iron concentrations in groundwater on the Blue Ridge Tissue Patterson Mill site. The selected background monitoring well location was in a wooded area northeast of the intersection of Yadkin River Road and Whisnant Road. At the same time, three additional monitoring wells, originally installed in 2009 were sampled: MW-2, MW-3 and MW-4.The subsequent groundwater monitoring identified total iron concentrations ranging from 29,000- 91,000ug(L including MW-1. Following a review of the results, in a letter dated June 2, 2011, the NCDENR indicated that MW-1 was not in a suitable location due to a soil contamination incident report during the replacement of the bridge over the Yadkin River on Whisnant Road. However, MW-1 location is north and up -gradient of the soil cleanup area and bridge project and thus, not believed to be in close proximity of or impacted by the oil release. The consultant's soil boring logs appear to confirm that the soil was not disturbed from prior remediation or construction activities. We maintain MW-1 is a good background well location and ask for further explanation as to why MW-1 is not an acceptable background well location understanding that it is not in close proximity to the prior remediation site and was not involved in previous construction activities. A photo of MW-1 location relative to oil release clean-up near the bridge and MW 1 Soil Boring Log are attached. In August 2011, NCDENR requested an additional monitoring well be installed to establish background iron concentrations in groundwater. The monitoring well was located west of Yadkin River Road and north of the existing well MW-3 on property owned by Joseph Doll. Groundwater samples were taken from MW- 5 on August 17, 2011 by AECOM showing total iron concentrations of 400ugtL. Based on area topography, this well does not appear to provide either an up -gradient or cross -gradient reference point to the subject site. Furthermore, based upon a North Carolina Geologic survey map that is attached, MW-5 also does not appear to be in the same rock type as monitoring wells 1-4 and thus MW-5 does not appear to represent a good background well location. Page 2 Mr. Brett Laverty November 21, 2013 Blue Ridge Tissue received information from NCDENR under a cover letter dated October 31, 2013 showing sampling results of five down -gradient neighboring drinking water wells. These sample results, which are from the June 2012 well receptor assessment that was conducted by the NCDENR, identified total iron to be very low in all five wells tested and therefore below the NC groundwater standard 15A NCAC 2L.0202 . We would like to better understand the assessment that was done on the down gradient drinking water wells. Can the NCDENR provide any additional information about those drinking water wells such as type of construction, aquifer sampled, etc.? Regarding the installation of an additional background monitoring well and two down gradient monitoring wells at the compliance boundary, we ask that the question as to the viability of MW1 versus MW5 be investigated further before we commit to the installation of these additional wells. If it is determined that a new background well is required, we prefer to develop an appropriate background well before developing the site reap and the two down gradient monitoring wells at the compliance boundary. In the meantime, Blue Ridge Tissue and Sealed Air are actively looking at alternatives to the Fiber Trap waste water treatment process as requested in your September 25, 2013 letter. Sincerely, li-IIk Dave Hallock Vice President and General Manager Blue Ridge Tissue avid Day Global Director EHS Auditing — Sealed Air Attachments: Photos, N.C. Geologic Map & Soil Boring Log cc: Dan Williams -- Global Environmental Programs Director - Sealed Air AECOM eport (Capability, 2 OF Approximate location of former Maintenance Garage (location of the new bridge) Blue Ridge Tissue Facility Monitoring Well MW-9 Photograph 3: View looking south toward the Blue Ridge Tissue Facility. Mote the location of MW-1 relative to the new bridge, where the maintenance garage was located. i Former concrete pad for A maintenance garage Photograph 4: 2007 view from the concrete pad looking north toward the future location of MW-1 CAWINDOWS\TEMPNAppendix D - Photograph Log.docx Oecernber 2011 Chem: Sealed Air Project Number. BORING ID.' MW-1 Site Location: Patterson, NC Coordinales: .Elevation: Sheet: Drilling Method.- Momforing Well Installed. Y Sam to T e s : Soria Diameter: Screened Interval. 6-1I t Weather: Lo ed Syr MD Daieffime Started; 217111 De 1h o Boring. 11 t DrillingContractor: AB Drilling Ground Elevation: Date/Trme Finishe, 217111 Water Level: p q o c� a U Q o w C a ro 5 MATERIALS: Color, size, range, MAIN COMPONENT, minor component(s), moisture content, structure, angularity, maximum grain size, odor, and Geologic Unit (If t{nawn) a n E K n s o Q (0-2) light brown SANDY SILT w/minor orgainic rnateral, dry. x 3 4 (2-6) Yellowish -orange SAND with gravel and minor fine sediment, dry- Alluvial sediment 5 deposits- fi 7 8 (6-10) As above with increasing gravel and rn inor cobbles (partially pulverized). 9 10 (10-1 1) PWR, refusal al 11' bls, gneiss. II 12 13 14 15 ifi 17 18 I9 20 Dale Time Depth to groundwater while drilling (VOTES: Checked by Date.