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Home My WebLink About19980260 Ver 6_U-2579DEF Onsite Lime Spill_20210714 Wanucha, Dave From:Kiser, Marcus K Sent:Wednesday, July 14, 2021 1:19 PM To:Braquet, Stephanie; Euliss, Amy; Wanucha, Dave; Chapman, Amy Cc:Puckett, Lester L; Tucker, Mezak; McLaughlin, Zachery R; Suggs, Phillip H; Wyrick, Scott D Subject:U-2579DEF Onsite Lime Spill Attachments:IMG_2095.jpg; IMG_2097.jpg; Slurry Pot Overflow.jpg All, As many of you know, we have been performing soil stabilization operations for the last 6 weeks on the U-2579DEF project. Our operation yesterday started at 7:00am and ended at 9:00pm. When the operation was complete, Site Prep (Sub-Contractor to Flatiron) went through their standard procedures for cleaning and securing equipment before they left for the night. One of their cleaning procedures is to fill their slurry tank (often referred to as a slurry pot) with fresh water to prevent the tank from clogging up with residue. As usual, they connected the slurry pot to a nearby fire hydrant to fill the tank. Apparently, Site Prep forgot to turn off the water before they left for the night so needless to say, after the tank got full of fresh water, it came out of the overflow spout that is shown in the attached pictures. When crews arrived on site this morning, they noticed that water was pouring out of the tank and running down the grade and that’s when everyone was made aware of the situation. We spent several hours out there this morning looking over the area and from what I can tell, a vast majority of the slurry was captured on the grade and/or in the adjacent ditch lines. I did not notice any residual accumulation on the rocks in the nearby stream, but some residue was noticed in ditch lines and rock checks on the grade. We instructed Flatiron to obtain pH samples upstream, and downstream at 100’ intervals to determine if the lime had an impact on the pH of the waters. The pH of the inlet was 6.8 and the pH of the outlet was 8.4. Flatiron will continue to review & monitor the channel condition over he next few weeks and check the pH until it normalizes. We do have slight lime residue in the pipe system that drains to permit site 8. We have installed impervious dikes at the outlet of the pipe that flows into permit site 8 and we intend on flushing the pipe system, capturing all the water with the impervious dike and pumping the water out and disposing of it properly. Marcus K. Kiser, P.E. Resident Engineer Division 9 Winston-Salem Construction Office 2 336 747 7950 office mkkiser@ncdot.gov 1151 North Martin Luther King Jr. Drive Winston-Salem NC 27101 1 From: Braquet, Stephanie <scbraquet@ncdot.gov> Sent: Wednesday, July 14, 2021 10:06 AM To: Kiser, Marcus K <mkkiser@ncdot.gov> Subject: FW: U-2579D, U-2579E, U-2579F FYI…for your records. Stephanie Braquet Division 9 Environmental Specialist North Carolina Department of Transportation 336 747 7800 office scbraquet@ncdot.gov 375 Silas Creek Parkway Winston Salem, NC 27127-7167 Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. From: Braquet, Stephanie Sent: Wednesday, July 14, 2021 9:30 AM To: Wanucha, Dave <dave.wanucha@ncdenr.gov>; Chapman, Amy <amy.chapman@ncdenr.gov> Cc: Euliss, Amy <aeuliss@ncdot.gov> Subject: U-2579D, U-2579E, U-2579F Good Morning, The above-mentioned project has had a lime spill overnight. This email is only to inform you that it happened, I don’t have any further details at this time. I can give you more information once a site review has been done and I talk to our folks. Thanks Stephanie Braquet Division 9 Environmental Specialist North Carolina Department of Transportation 336 747 7800 office scbraquet@ncdot.gov 375 Silas Creek Parkway Winston Salem, NC 27127-7167 2 Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. Email correspondence to and from this sender is subject to the N.C. Public Records Law and may be disclosed to third parties. 3 s — ON r b� ' f 'Ald 4 - . MP low- OSPk r s Fes ' .,. - MR ; 4 1h y 'Ml� z '+^T a v a .a •. ,• ' it,.• • ;r Jai - �• Y r��