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HomeMy WebLinkAboutNCG140380_COMPLETE FILE - HISTORICAL_20170626STORMWATER DIVISION CODING SHEET NCG PERMITS PERMIT NO. /v UOC TYPE C4 HISTORICAL FILE ❑ MONITORING REPORTS DOC DATE ❑ 2� D) YYYYMMDD I Alexander, Laura From: James Washburn <James_Washburn@stwcorp.com> Sent: Wednesday, May 24, 2017 2:35 PM To: Alexander, Laura Subject: NCG140000 Permits Follow Up Flag: Follow up Flag Status: Flagged Laura, The contact information on all of S.T. Wooten Corporation's Permit Contact Summery sheet should read: Owner Contact: Facility Contact: Permit Contact: Permit Billing: Name Title Address Phone Fax Email James Washburn / Environmental Compliance Manager / PO Sox 2408 Wilson NC 27894-2408 / (252) 290-5912 / (919) 779-3963 / iames.washburn(�stwcorn.com NCG140428 V NCG1 NC 2 NCG140263 This applies to hese Permits: 40 NCG1402 + NC 4 CG140121 �Q NCG140352V/ NCG 40289 NCG140399 NCG140365 NCG1 NCG140247 CG 1 NCG140235 Hope this is all you need, if not please let me know. The Legally Responsible Individual sheets will be mailed to you. Thanks James Washburn Environmental Compliance Manager %;�S.T. WQOTEAI n S. T. Wooten Corporation 3801 Black Creek Road Wilson, NC 27893 mobile 252.290.5912 1 of w A 14S � r Mr. Doug K. Sutton 3801 Black Creek Road Wilson, NC 27893 Dear Mr. Sutton: Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Coleen H. Sullins, Director Division of Water Quality December 12, 2008 57 1 Subject: General Permit No. NCG 140000 S.T. Wooten Corporation - Plant #20 COC No. NCG140380 . Wayne County In accordance with your application for a discharge permit received on April 16, 2008, subsequent additional information received in August and October of this year, and final revised plans and calculations received November 14, 2008, we are forwarding herewith the subject certificate of coverage (COC) to discharge under the subject state - NPDES general permit. This permit is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the US Environmental Protection__ ----,Agency dated October 15,-2007_{or_as-subsequently_amended)_---- ---- ---- -- -- --- -- - - Please take notice that this certificate of coverage is not transferable except after notice to the Division of Water Quality. The Division of Water Quality may require modification or revocation and reissuance of the certificate of coverage. This permit does not affect the legal requirements to obtain other permits which may be required by the Division of Water Quality or permits required by the Division of Land Resources, Coastal Area Management Act or any other federal or local governmental permit that may be required. An Authorization to Construct (ATC) treatment facilities has been issued concurrently with this COC. The Washington Regional Office, telephone number (252) 946- 6481, shall be notified at least forty-eight (48) hours in advance of operation of the installed facilities so that an in -place inspection can be made. Such notification to the regional supervisor shall be made during the normal office hours from 8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding State Holidays. Upon completion of construction and prior to operation of this permitted facility, a certification must be received from a professional engineer certifying that'the permitted facility has been installed in accordance with the NPDES Permit, the associated Authorization to Construct, and the approved plans and specifications. Please mail the certification (attached) to the Stormwater Permitting Unit, 1617 Mail Service Center, Raleigh, NC 27699-16I 7. IVo e Carolina )WA(ra!!y North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone {919) 807-6300 Customer Service laternet: www.newater ualit .or Location: 512 N. Salisbury St. Raleigh, NC 27604 Fax (919) 807-6494 1-877-623-6748 An Equal Opportunity/Atfamative Aclion Employer— 50% Recyded/10% Post Consumer Paper Mr. Doug K. Sutton S.T. Wooten Corporation — Goldsboro Plant NCG 140380 December 12, 2008 Please note that any future construction, installation, or modification of wastewater treatment facilities (including process wastewater recycle systems) will require an Authorization to Construct (ATC) prior to construction per 15A NCAC 211.0138 & .0139. You must submit, in triplicate, plans/specifications and design calculations, stamped and sealed by a professional engineer, with a letter requesting an ATC to the Stormwater Permitting Unit, 1617 Mail Service Center, Raleigh, NC 27699-1617.] One (1) set of approved plans and specifications is being forwarded to you. The Permittee shall maintain a copy of the approved plans and specifications on file for the life of the facility. If you have any questions concerning this permit or Authorization to Construct, please contact Bethany Georgoulias at telephone number (919) 807-6372 (please note change in phone number). Sincerely, for Coleen H. Sullins cc: Washington Regional Office R. S. (Butch) Lawter, Jr. Jon Meade/ Bartlett Engineering & Surveying, PC/ 1906 Nash Street North/ Wilson, North Carolina 27893-1726 _C&ntraI-Ft' les _-- - Stormwater Permitting Unit Files enclosure Mr. Doug K. Sutton S.T. Wooten Corporation — Goldsboro Plant NCG140380 December 12, 2008 Engineer's Certification COC No. NCG140380 I, _ as a duly registered Professional Engineer in the State of North Carolina, having been authorized to observe (periodically, weekly, full time) the construction of the project, Project Name Location for the Permittee hereby state that, to the best of my abilities, due care and diligence was used in the observation of the following installations: • Construction of a process wastewater recycle system at the S.T. Wooten Corporation — Goldsboro (Plant.#20) site. I certify that the construction of the above referenced project was observed to be built within substantial compliance and intent of the approved plans and specifications. Signature Date Mail this Certification to: Registration .No. Stormwater Permitting Unit NC Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699--1617 STATE OF NORTH CAROLINA DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES DIVISION OF WATER QUALITY GENERAL PERMIT NO. NCG140000 CERTIFICATE OF COVERAGE No. NCG140380 STORMWATER AND PROCESS WASTEWATER DISCHARGES NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water Pollution Control Act, as amended, S.T. Wooten Corporation is hereby authorized to operate a process wastewater treatment (recycle) system, and is hereby authorized to discharge process wastewater and stormwater from a facility located at S.T. Wooten-Corporation—Rlant #20 Goldsboro Wayne County to receiving waters designated as The Canal to Little River, a class C; NSW water in the Neuse River Basin, in accordance with the effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III, IV, V, and VI of General Permit No. NCG 140000 as attached. This certificate of coverage shall become effective December 12, 2008. This Certificate of Coverage shall remain in effect for the duration of the General Permit. Signed this day December I2, 2008. for Coleen H. Sullins, Director Division of Water Quality By the Authority of the Environmental Management Commission C) MS' N P&r1 Ct liV�� Paz D, j S.T. Wooten Coporatio 1 - ; Goldsboro Concrete Plant # 0 S U 'ell �MIffilffl -4w At diod _f Q I NCG140380. .N w S Map Scale 1:24, 000 N ue 4RI A L U.1illif cohter A 61 B M7 S.T. Wooten Corporation - Goldsboro Concrete Plant #20 Latitude: 350 24147'r N Longitude: 780 1'49" W County: Wayne Receiving Stream: The Canal Stream Class: C - NSW Sub -basin; 03-04-06 (Ne.use River Basin) Facility Location NCG140380 May 8, 2008 B. Georgoulias Revised 12/11/08 S.T. Wooten - Goldsboro Concrete Plant Summary This facility submitted a Notice of Intent to be covered under General Permit NCG140000 (Ready -mixed Concrete). The stormwater discharge drains to "The Canal' (to Little River) (Class C; NSW), in the Neuse River Basin. This facility is located in Wayne County, handled by the Washington Regional Office. Application review a) The permit application has been signed and sufficiently completed. Yes, but required another signature page (submitted). Also, additional information on treatment system design needed to complete ATC review. Add info. requested on 5/8/08; after repeated extensions, submitted on 8/21/08. Meeting with consultant on 10/8; more add. info. submitted on 10/16 and 11/14. b) The SIC code accurately describes this facility's activities and is covered by this general permit. Yes, SIC 3273 (Ready -mixed Concrete). c) Does the facility propose a new or expanding wastewater discharge to ORW waters (not allowed), or waters upstream of ORW (special limits may apply)? No. d) DEH or Shellfish Sanitation Approval Required? N/A e) Does this facility have other permits? No. f) Hazardous Waste Activities? No. g) DLR Mining Permit status: N/A h) Regional Office input requested: 11/12/08 (J. Manning/T. Edgerton, WaRO) RO Approval received: 12/12/08 (see attached e-mails). i) Is an ATC/ATO Required (NCG02 or NCG14)? Yes. See Special Notes. j) Erosion/Sedimentation Plan Applied for [NCG14 or NCG02 ATC only]? Yes-11/14/2007 Letter of Approval with Modification included. k) Application approved? Yes 1) In Mecklenburg or Wake County (If so, copy final COC there)? No. m) Special Notes: An ATC is required; however, additional information needed to demonstrate compliance with NCG14 limits. Applicant proposes recycle system that can meet limits in event of overflow in a rain event. NCG140380 Phone logs May 8, 2008 B. Georgoulias Revised 12/11/08 9/5/08: E-mail to Robert Bartlett, P.E. re: questions about additional information submitted 8/21. Contact is Jon Meade 'on@bartletten .com) 10/8/08: Meeting with Butch Lawter of S.T. Wooten and Jon Meade. Will go back to correct Stoke's Law talcs and try to reduce drainage area to treatment system. We recommended segregating out portion of plant site drainage area so not all stormwater drains into wastewater treatment system. 11/10/08: Talked with Jon Meade about last remaining issues (see 11/4 additional information review notes). He will revise plans and talcs as necessary and re -submit. Original Plan Submittal Review • See 5/8/08 Add. Info. request letter for details. • Since several possible discrepancies identified and a need to modify the peak flow/runoff volume calculations, will hold off in-depth review of settling talcs until revised information submitted. Additional Information Review, 9/3/2008: • Wastewater input assumptions do not include drum washout (apparently will be stabilized with Delvo) • Design assumes negligible contribution from stockpile wetdown • Revised C values for Qp�ak, but still combined into a composite C value.... may be okay since most impervious surfaces are "disconnected" from recycle basin by some managed pervious area. Not sure I agree with C = 0.70 for stockpile area, especially if this is aggregate (washed stone) that compacts the ground ... depends on soil type. Might be a fine point of argument, however. [There are bigger`problems with the Stoke's Law and TSS calculation in this re -submittal.] • Assumed t� = 6 min (not sure why this was favored over 5 min, but not unreasonable, so will accept). • Engineer assumed density of cement = 94 lb/cu. ft. This is a common mistake — it is actually the bulk density of dry powder that takes into account voids. Actual density is more like 197 lb/cu. ft. Will keep this in mind through review — it actually builds in an extra layer of conservative design (critical velocity will be less because particles are heavier than assumed). According to his Stoke's Law calculation, particles < 6 µm will pass over the weir [adjusting the density means 2 µm and smaller will pass.] • Q1: Peak flow calculation okay (unless stockpile area C needs to be adjusted), but weir length in calculations is 20' ... on the plans, the weir appears to be 10'. Why the discrepancy? This will make a difference to the H above weir talc. in the design storm. • Q2: Pump and recycle line shown in the concrete chamber on sheet RB2, but not on RB 1 ... what's that for? • Q3: 5 gal/CY looks a little low for vehicle wash assumption ... what's this based on? Usually see 10-15 gal. [May not matter so much since Qp for 25-year storm.] 4 .�f NCG140380 May 8, 2008 B. Georgoulias Revised 12/11/08 Q4:` The maximum capacity of this plant has changed since the first submittal (almost doubled to 480 CY/day) ... was this a change in plans? Q5; 0.5 lb/CY of cement off each truck used to calculate cement mass discharged — looks low (usually see 10 or greater lb/CY at least) ... what's the basis of this number? Q6: PROBLEM. In calculating the mass of particles in the discharge, the engineer assumed the PSD percentages referred to percent of particles, not percent of mass of particles that fall into the specified size range. He translated this to a much smaller percent of total volume and assumes the percent mass is the same ... a grave underestimate of the mass of particles passing over the weir in the design event. In his talcs, he should have carried 29.9% of the mass (not 0.028%) that are 6 µms and smaller through the TSS concentration estimate. Need to re -do calculations applying the `%<' value to the mass of cement he assumes can leave the basin [note, he could make an assumption about a certain percentage being distributed below the weir in the water column, which he has not done]. This is a problem because as the talcs stand now, the design will not predict compliance with TSS. However, there is also a problem with the volume used to calculate TSS... QT PROBLEM. TSS calculation based on the volume of runoff from a 25-year event intensity over a 6 minute period, which does not make sense. To predict compliance at point of the greatest TSS concentration leaving the basin in such an event: TSS = [mass of cement leaving basin]/[volume of basin below weir] ... This would reflect the "worst case" scenario of: max dispensed concrete at end of a full work day in the volume of water before it rises up to the weir to discharge. Might argue that volume should be where it does rise over weir (using H for 25-year peak flow, based on earlier talcs) — this would be acceptable. Should also consider making an allowance for some portion of the system to be filled with settled solids (which will only be removed periodically). Above issues need to be addressed before we can approve this ATC and COC. Additional Information (submitted 10/16) Review, 11/4/2008: • Resubmitted calculations on 10/16/2008. • Reduced drainage area to exclude stormwater runoff from entrance drive. However, road and concrete parking area in front of building should show some spot elevations and flow direction arrows to ensure contractor grades and builds site correctly. Otherwise as drawn, some portions may drain back towards treatment system. Consultant will revise plans. • Basin size volume discrepancy? Consultant will correct. • Design basis = 200 CY/day, but air permit max is 480 CYlday,? Verify. • Consultant has excluded initial settling basin from calculations to allow for some volume of solids accumulation that will not factor into retention time. Okay. • Calculations use 94 lb/cu. ft density for cement, which is actually a bulk density (accounts for voids in dry form). The density of a Portland cement particle is closer to 2001b/cu. ft, but will mean settling in less time (conservative). :'> t NCG140380 May 8, 2008 B. Georgouliss Revised 12/11/08 Still think earthen basins here are not ideal for a recycle system. However, currently we are not imposing concrete structures as necessary in designs to be approved (and have approved earthen systems at other ready -mixed concrete plants). Additional Information (submitted 11/14) Review, 12/11/2008: Presumed 480 CY/day max production unlikely and kept 200 CY/day design basis. Okay, will accept. Corrected basin size. • Plan Sheet RB1A now includes spot elevations and flow direction. Re: NOI/ATC Request from ST Wooten for Goldsboro Plant 920 Subject: Re: NOI/ATC Request frorn ST Wooten for Goldsboro Plant #f20 From: Thom Edgerton <Thom.Edgerton @ncinai1.net> Date: Fri, 12 Dec 2008 1 1:52:47 -0500 To: Bethany Georgoulias <Bethany.Georgoulias a ncniaiLnet> Hello, I do not have any objection to the issuance of the COC. Please let me know if you need more information. Thanks, Thom Thom Edgerton North Carolina Department of Environment & Natural Resources (NCDENR) Division of Water Quality (DWQ) Surface Water Protection Section (SWPS) (252) 948-3955 - Office (252) 946-9215 - Fax Bethany Georgoulias wrote: Thom, I think this was originally supposed to go to you, but I imagine you eventually saw it when the hard copies came to your office. We did receive revised plans with spot elevations where we'd requested on November loth. To keep it from becoming a victim of our backlog, I had it on my schedule to issue tomorrow, but I wanted to check with you since I'd sent it to Jeffrey Manning first. I will go ahead and forward the plans with minor revisions to you, but please let me know if you want us to hold off issuing the COC in the meantime. Thanks, Bethany Bethany Georgoulias wrote: Hi Jeffrey, We've received an NOI for the proposed ST Wooten Plant in Goldsboro for coverage under NCG14, which includes an ATC request for the proposed wastewater treatment systems. We've already been through a couple add. info. requests and a meeting with them (Butch Lawter from ST Wooten and Jon Meade from Bartlett Engineering), and I'm in the middle of reviewing the most recent revisions -- submitted last month. There are just a few items I've asked the engineer to address, so I wanted to go ahead and request WaRO input. This plant will discharge stormwater and wastewater (overflow from a recycle system consisting of a series of earthen basins and pH control) to 'The Canal' to the Little River, C-NSW waters. The add info. I got last month went through calcs for showing compliance with TSS, pH, and SS limits at outlet of the recycle basins. I'm attaching the NOI to this email and our first add. info. request. There's another signature page because Butch Lawter did not have signatory authority for the NOI. I'll forward you a hard copy of the plans (there is a revision in the works, which I'll forward when I receive). I've spared you a copy of the calculations, but if you want them, I'll be glad to send them your way. Does the Washington Regional Office have any concerns about issuing this facility a COC/ATC for this general permit? If we don't receive any objections or requests from WaRO to hold until further notice, we will consider moving forward with the COC/ATC in 30 days, as long as no other information is needed I oft 12/12/2008 1 1:53 AM Re: NOUATC Request from ST Wooten for Goldsboro Plant #20 1a from their engineer. If you have any questions, please let me know. Thanks! Bethany G. 2 of' 2 12/12/2008 1 1:53 AM NOI/ATC Request from ST Wooten for Goldsboro Plant 420 Subject: NOVATC Request from ST Wooten for Goldsboro Plant #20 From: Bethany Georgoulias <Bethany. Georgoul ias@ ncmail.net> Date: Wed, 12 Nov 2008 10:10:15 -0500 To: Jeff Manning <jeff.a.manning a ncmail.net> Hi Jeffrey, We've received an NOI for the proposed ST Wooten Plant in Goldsboro for coverage under NCG14, which includes an ATC request for the proposed wastewater treatment systems. We've already been through a couple add. info. requests and a meeting with them {Butch Lawter from ST Wooten and Jon Meade from Bartlett Engineering), and I'm in the middle of reviewing the most recent revisions -- submitted last month. There are just a few items I've asked the engineer to address, so I wanted to go ahead and request WaRO input. This plant will discharge stormwater and wastewater (overflow from a recycle system consisting of a series of earthen basins and pH control) to 'The Canal' to the Little River, C-NSW waters. The add info. I got last month went through calcs for showing compliance with TSS, pH, and SS limits at outlet of the recycle basins. I'm attaching the NOI to this email and our first add. info. request. There's another signature page because Butch Lawter did not have signatory authority for the Not. I'll forward you a hard copy of the plans (there is a revision in the works, which I'll forward when I receive). I've spared you a copy of the calculations, but if you want them, I'll be glad to send them your way. Does the Washington Regional Office have any concerns about issuing this facility a COC/ATC for this general permit? If we don't receive any objections or requests from WaRO to hold until further notice, we will consider moving forward with the CCC/ATC in 30 days, as long as no other information is needed from their engineer. If you have any questions, please let me know. Thanks! Bethany G. Bethany Georgoulias Environmental Engineer NC DENR Division of Water Quality Stormwater Permitting Unit tel. (919) 807-6372 fax (919) 807-6494 I of 3 1 1/12/2008 10:11 AM INIOUATC Request from ST Wooten for Goldsboro Plant #20 1V �v 0,�f �j jj LI 711 K _31 < S.T. Wooten Coporation - 10 Goldsboro Concrete Plant #20 Y P o A 41 4�; V X s, L. V� i� In l A - J fA I Nit _K A, X, z IPA.. K, NN X A J, V NCG140380 S.T. Wooten Corporation - Goldsboro Concrete Plant #20 Latitude: 350 24' 47" N Longitude: 7811 V49" W County: Wayne S Receiving Stream. The Canal Stream Cass; C - NSW Map 5cdl,- 1.-24, 000 Sub -basin: 03-04-06 (Neuse River Basin) Facility Location NCG140380—NOI.pdf, Content -Type: application/pdf 2 of 3 11/12/2008 10:11 AM Re: ST Wooten - Goldsboro (NCG 140380 ATC/COC Application) Subject: Re: ST Wooten - Goldsboro (NCG140380 ATC/COC Application) From:'Bethany Georgoulias<Bethany.Georgoulias@ncmail.net> Date: Mon, 10 Nov 2008 16:28:55 -0500 To: Jon Meade <jon@bartletteng.com> Hi Jon, Just wanted to send an e-mail to summarize what we talked about today - 1) Please check the basin size volume below the weir calc. on your first page of calculations. You have 19,642 of, but later you use the 26,820 cf from the stage' storage calculations at the same elevation (that's the same value you used in the TSS concentration talc.). Not sure if the volume on that first page will affect other calcs, but please revise if needed and make sure no other changes -are necessary. 2) The changes to the drainage area to exclude stormwater runoff from the entrance drive are a good move. The grading plan on sheet RBIA shows changes that shed much of the stormwater away from the treatment basin, but we would offer a couple recommendations to ensure the site -is graded and paved correctly at the entrance area by anyone looking at the plans. Consider.(a) some spot elevations along the road and (b) runoff flow arrows to show how the water will flow in a different direction from the dashed drainage area leading to the recycle basin -- especially in the area where the asphalt drive and concrete parking area in front of the building are. Please send in any revisions to the plans and calcs (3 copies) to me. I'll go ahead and touch base with the Washington Regional Office about this site. I'll.forward any revised copies of the plans to them when I -receive them. Thanks, Bethany Georgoulias Bethany Georgoulias Environmental Engineer NC,DENR Division of Water Quality Stormwater Permitting Unit tel. (919) 807-6372 fax (919) 807-6494 I of 1 11/12/2008 10:14 AM RE: One additional queston Subject: RE: One additional queston From: Jon meade" <jonm@Bart] etteng.eom> Date: Tue, i 1 Nov 2008 13:38:30 -0500 To: "Bethany Georgoulias"<Bethany.Georgoulias@ncmail.net> Hey Bethany, Yes, I discussed this with Butch earlier and the anticipated plant production would be 200CY/day although the air permit would allow up to 480CY/day based on the locat-1 on of the plant. We figured to design the recycle basin based on the 200CY/day at this point because it -may be a long time (or not at all) before exceeding this amount. Thanks, Jon Meade Bartlett Engineering and Surveying Wilson, NC 27893 252=399-0104 http://www.bartlett.us.com -----Original Message ----- From: Bethany Georgouliaslmailto:Bethany.Georgoulias@ncmail.net) Sent: Tuesday, November 11, 2008 1:03 PM To: jon meade Subject: One additional queston Ha Jon, I forgot one other question when we talked yesterday - From our meeting notes, I have that the maximum amount in the air permit for ST Wooten's planned Goldsboro plant is 480 CY/day, but I noticed the calculations dropped back to an anticipated 200 CY/day. Is there a reason for setting the design case at 200 CY instead? Thanks, Bethany Georgoulias Bethany Georgoulias Environmental Engineer NC DENR Division of Water Quality Stormwater Permitting Unit tel. (919) 807-6372 fax (919) 807-6494 1 of 1 l 1/12/2008 10: l4 AM ov �-n `LoDb L) J . R45 [ E--} A 5 5 f_�t ors - s�-=�i�t`:�Y=a�-c.� Ti�.�z �v;G_�+���-�•L-or_�'el/J7��.}1(��]'1}y�/y/'�� Ly- AJ g 51- VQCW4- e. 4y �o La. VV - 7 r- Yl G-wx,� L'�ks "vo 11 / ~I lr7 •V �♦��Q� G� GS_JA �I i� I i I� BARTLETT ENGINEERING & SURVEYING, PC 2 1906 Nash Street North Wilson, NC 27893-1726 t Phone: (252) 399-0704 Fax: (252) 399-0804 70 c) jon®banletteng.com pe y{ r� November 11, 2008 g � 9@ Raleigh Regional Office Department of Environment and Natural Resources Stormwater and General Permits Unit 1617 Mail Service Center Raleigh, NC 27699-1617 REFERENCE: S.T. WOOTEN CORPORATION-GOLDSBORO CONCRETE PLANT 1\1s. Georgouhas: Bartlett Engineering and Surveying on behalf of S.T. Wooten Corporation (ST D, presents the additional information request for`NCG 140380 NOI application. The proposed concrete plant is anticipated to produce approximately 200CY of concrete per day and have 6-7 trucks used for load out. Delvo will be used to stabilize the mixture in between loads and overnight. it is assumed on a worst case condition that a maximum of half the trucks will wash out drums on a daily basis (4 trucks with drum wash out daily) with 0.25CY of concrete washed out per truck. In order to keep the recycle basin as small as possible and still meet effluent conditions, drainage areas to the basin were reconfigured to provide for containment of areas of high concern (mainly washout and stockpile areas) while bypassing "clean" stormwater runoff areas. The additional information is discussed below. ✓ • The volume below the weir elevation of 99.5' was corrected on the first page of calculations from 19,642cf to 26,280cf after veriftring volumes. 4/ • Additional spot grades and flow direction arrows added to grading plan. Previously addressed information dated October 15, 2008. • The C value for the stockpile area was increased from 0.7 to 0.9. • The weir length should have been 20ft on the old plans. Revised calculations show the weir length to be 75ft. This weir length will be provided at the end of an additional chamber. ,/ • The lines from the pH and control going to the first earthen basin make a loop for continuous pH adjustment. The pump and recycle line will be placed in the 2'<D earthen basin to provide for water re -use. ✓• The operating capacity of the plant will be approximately 200CY/day. The 0.5lb/CY of cement off of each truck is based on what is washed off of the outside of the trucks. There will be 6-7 trucks used daily= Delvo stabilizer will be used in the drums between loads and overnight. It is assumed that on a worst case basis, approximately one-half (4 for calculations) of the trucks would wash out drums on a daily basis. Stoke's Law Calculation: Calculations were redone using the %< represented as a percent mass and not a percent number. This required us to add an additional chamber to the recycle system and a weir length of 75ft for the last chamber to predict compliance with TSS concentrations. /• The TSS calculation was changed to represent the mass of cement that would discharge over the weir for the 25yr intensity with 6 minute time of concentration / volume of water below the discharge weir elevation of 99.5'. The volume of water in the concrete chamber portion was not included in the total volume to allow for settled particulates. Also, the predicted TSS calculation would be under the TSS of 30mg/I if only 87 2% of the basin volume below 99.5' contour was available. We appreciate your assistance with this matter. If you have any questions or need additional information, please contact our office. Thank you. Sincerely, Robert S. Bartlett, P.E. SEAL 20106 S.T. WOOTEN-GOLDSBORO CONCRETE PLANT RECYCLE WASH -WATER BASIN CALCULATE PEAK FLOW FOR SITE (25YR PEAK FLOW -NOT 24HR STORM EVENT) Qp=CIA Qp = peak rate of runoff in cubic feet per second (cfs) C= coefficient of runoff 1=intensity of rainfall in inches per hour A=drainage area in acres Coefficient of runoff; C Rainfall Intensity; I Drainage Area; A Tc Peale Runoff; Qp Runoff Volume (25yr storm 6min duration) = 0.76 = 8.64 inches/hour = 2.96 acres 6 min 19.44 cfs = 0.161 acre feet 6997 cu ft CALCULATE PROCESS WASTEWATER FLOW AT SITE Average work day = 10 hours Wash water produced = 5 gal/CY Anticipated plant production = 200 CY/day Wash water per day = 1000 gallon 1 gallon = 0.133681 cf Wash water per day =1 133.7 cf DETERMINE BASIN SIZE Total Volume of basin (96.0'-101.0')(cf) 41,212 Volume at weir elevation (99.5') (cf) 126,820 Average Dimensions of the Surface of the Basin Length(ft) 200 Width(ft) 45 Avg. Surface Area of the Basin w/ Chamber 9265 sq ft (99.5 countour) Weir Length (ft) 75 ft CALCULATE DEPTH OF FLOW OVER THE DISCHARGE WEIR By: Robert S. Bartlett, P.E. Bartlett Engineering and Surveying, PC Wilson, NC 27893 252-399-0704 25 year storm w/Tc=6min (see Hydrograph) H=[Q/(3.1"L))^0.66667 NOTE: BASIN NOT DESIGNED TO HOLD THE 25YR-24HR STORM EVENT H=Depth of flow over weir in (ft) FOR 25YR PEAK FLOW, DISCHARGE DEPTH OVER WEIR--0.21FT Q=flow in cfs L=Length of weir (ft) Normal Operation (no rain) Qn= 0.004 cfs Hn= 0.001 ft During Rain Event Qp= 19.44 cfs Hp= 0.191 ft CALCULATE CRITICAL VELOCITY OF PARTICLES IN POND DURING PEAK FLOW Vc=Qp1A Vc=critical velocity in fUsec Qp=peak flow A=average surface area of pond at overflow Critical Velocity (Vc)= 0.002098219 fUsec Retention time of particle (Rp) during peak flow -Average Pond Length at SurfaceNc= Retention time(Rp) 95318.9 seconds Critical settling velocity (Vc*) for particle to settle to weir (rain)=Hp/Rp Critical settling velocity (Vc*) 1 2.00601 E-06 ft/sec DETERMINE WHICH SOLIDS WILL DISCHARGE OVER WEIR Focus will be on cement particles which are the least likely to settle and therefore the most likely to discharge due to their small size . Calculate particle settling velocity (Vp) and compare it to Vc*. If Vc*>Vp, then those solids will discharge over the weir. Formula for calculating particle settling velocity (Vp) Particle settling velocity (ft/sec), Vp=(2g(p1-p2)r^2}I(9u) Stokes Law g=gravity = 32.2 d=diameter of cement particle(ft) _ 1 micron = 3.28084E-06 ft p1=density of cement = 94 Iblcf p2=density of water = 62.4 Ib/cf u=viscosity of water = 0.0005981 lb/ft-sec Source: NISTIR 6931 "Analysis of the ASTM Round -Robin Test on Particle Size Distribution of Portland Cement; Phase II Particle Discharge Diameter size distribution %< diameter (ft) Settling Velocity Critical Settling Over Weir (microns) Vp (ft/sec) Velocity; Vc (ft/sec) (YIN) 1 4.7 4.7 3.28084E-06 1.01734E-06 2.00601 E-06 Y 1.5 2.6 7.3 4.92126E-06 2.28902E-06 2.00601E-06 N 2 4.8 12.1 6.56168E-06 4.06937E-06 2.00601 E-06 N 3 5.6 17.7 9.84252E-06 9.15607E-06 2.00601E-06 N 4 4.6 22.3 1.31234E-05 1.62776E-05 2.00601 E-06 N 6 7.6 29.9 0.000019685 3.66241 E-05 2.00601 E-06 N 8 6 35.9 2.62467E-05 6.51098E-05 2.00601 E-06 N 12 10.5 46.4 3.93701 E-05 0.000146497 2.00601 E-06 N 16 8.2 54.6 5.24934E-05 0.000260439 2.00601 E-06 N 24 13.8 68.4 7.87402E-05 0.000585989 2.00601 E-06 N 32 10.3 78.7 0.000104987 0.00104176 2.00601 E-06 N 48 12.4 91.1 0.00015748 0.002343945 2.00601 E-06 N 64 5.2 96.3 0.000209974 0.00416704 2.00601 E-06 N 96 2.8 99.1 0.000314961 0.00937584 2.00601 E-06 N 128 0.4 99.5 0.000419948 0.016668161 2,00601 E-06 N > 128 0.5 100 - 2.00601 E-06 N Based on these calculations, particles less than 1.5 microns will discharge over the weir. Estimated amount of cement washed off each truck 0.5 Ib/CY Mass of cement washed off trucks 100 lb/day Mass of cement from drum washout 500 lb/day (See assumptions next page) There will be 6-7 trucks used per day. Delvo will be used in drums between loads and also overnite most of the time. Assume worst case half of trucks used (4) will wash drums out each day. Assume 0.25 CY of concrete will be washed out during drum washout. (500lbs of cement per CY or concrete) Mass of cement to discharge=Mass of cement washed off trucks each day x % of mass= 43.8 Ibs/day 19885200 mg/day Total Suspended Solids of Discharge (TSS)=Mass of cement (mg)/Volume of Basin below full pool (995) (liters) TSS= 19885200 1 759458liters Volume below weir (995) 26820 cu. ft. Anticipated Max.TSS (mg/1) 26.183 mg/I Max. TSS (mg/1) 30 mg/I Note: Volume of concrete basin not considered in these calculations and predicted TSS will be under 30mg/I with approximately 12.8% of the basin volume or 3420 cu.ft. taken up by settled solids. Basin would need to be cleaned out when bottom elevation reads-95.8'. CALCULATE SETTLEABLE SOLIDS DISCHARGE Methodology for settleable solids measures the volume of settleable solids in an Imhoff cone after 60 minutes. An Imhoff cone is approximately 14-inches tall. Results are reported in ml/L. The following table calculates the time for particles to settle 1 ", 6", and 14". Diameter Settling Velocity 1" Settling 6" Settling 14" Settling (microns) (ft/sec) Time (min) Time (min) Time (min) 1 1.01734E-06 1365.21 8191.28 19113 1.5 2.28902E-06 606.76 3640.57 8494.67 2 4.06937E-06 341.3 2047.82 4778.25 3 9.15607E-06 151.69 910.14 2123.67 4 1.62776E-05 85.33 511.96 1194.56 6 3.66241 E-05 37.92 227,54 530.92 From calculations above, particles 2 microns and smaller will take longer than 60 minutes to settle only 6". Anticipated Settleable Solids= 0 ml/I Max. Allowable Settleable Solids 5 ml/L BASIN VOLUMES INCREMENTAL TOTAL STORAGE STORAGE STAGE FT ELEVATION (CU FT) (CU FT 0 95 0 0 1 96.0 4,088 4,088 2 97.0 5,072 9,160 3 98.0 6,152 15,312 3.5 99.0 7,315 22,627 4 99.5 4,193 26,820 5 100.0 4,484 31,304 COMMENTS 6 101.0 9,908 41,212 NOTE:The recycle basin is designed to provide adequate settling to meet effluent concentrations for the 25yr intensity with pH adjustment and not designed to hold the 25yr 24hr storm event. Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD® Civil 313® 2008 by Autodesk, Inc, v6.052 Tuesday, Oct 14, 2008 Hyd. No. 1 Goldsboro Recycle Basin Hydrograph type = Rational Peak discharge = 19.44 cfs Storm frequency = 25 yrs Time to peak = 6 min Time interval = 1 min Hyd. volume = 6,997 cuft Drainage area = 2.960 ac Runoff coeff. = 0.76 Intensity = 8.640 in/hr Tc by User = 6.00 min IDF Curve = Goldsboro NC NOAA ATLAS 14JDF Asc/Rec limb fact = 1/1 Goldsboro Recycle Basin a (efs) Hyd. No. 1 -- 25 Year Q (Cfs) 21.00 21.00 18.00 18.00 15.00 15.00 12.00 12.00 9.00 9.00 6.00 6.00 3.00 3.00 000 000 0 1 2 3 4 5 6 7 8 9 10 11 12 - Hyd No. 1 Time (min) ,�?W 'JZNIGVV (Xvj;ly BARTLETT ENGINEERING & SURVEYING, PC 1906 Nash Street North Wilson, NC 27893-1726 Phone: (252) 399-0704 Fax: (252) 399-0804 jon@bartletteng.com October 15, 2008 Raleigh Regional Office Department of Environment and Natural Resources Stormwater and General Permits Unit 1617 Mail Service Center Raleigh, NC 27699-1617 [2@ F90W1 U OCT 16 2008 U DENR - WATEF7 QU l letlands & Stotmwater &arch REFERENCE: S.T. WOOTEN CORPORATION-GOLDSBORO CONCRETE. PLANT Ms. Georgoulias: Bartlett Engineering and Surveying on behalf of S.T. Wooten Corporation (STW), presents the additional information request for the NCG 140380 NO] application. The proposed concrete plant is anticipated to produce approximately 200CY of concrete per day and have 6-7 trucks used for load out. Delvo will be used to stabilize the mixture in the drums between loads and overnight. It is assumed on a worst case condition that a maximum of half the trucks will wash out drums on a daily basis (4 trucks with drum wash out daily) with 0.25CY of concrete washed out per truck. In order to keep the recycle basin as small as possible and still meet effluent conditions, drainage areas to the basin were reconfigured to provide for containment of areas of high concern (mainly washout and stockpile areas) while bypassing "clean" stormwater runoff areas. The additional information is discussed below. • The C value for the stockpile area was increased from 0.7 to 0.9. • The weir length should have been 20ft on the old plans. Revised calculations show the weir length to be 75ft. This weir length will be provided at the end of an additional chamber. • The lines from the pH and control going to the first earthen basin make a loop for continuous pH adjustment. The pump and recycle line will be placed in the 2`O earthen basin to provide for water re -use. • The operating capacity of the plant will be approximately 200CY/day. The 0.51b/CY of cement off of each truck is based on what is washed off of the outside of the trucks. There will be 6-7 trucks used daily. Delvo stabilizer will be used in the drums between loads and overnight. It is assumed that on a worst case basis, approximately one-half (4 for calculations) of the trucks would wash out drums on a daily basis. • Stoke's I-aw Calculation: Thanks for getting us straight on this one. Calculations were redone using the %< represented as a percent mass and not a percent number. This required us to add an additional chamber to the recycle system and a weir length of 75ft for the last chamber to predict compliance with TSS concentrations. The TSS calculation was changed to represent the mass of cement that would discharge over the weir for the 25yr intensity with 6 minute time of concentration / volume of water below the discharge weir elevation of 99.5'. The volume of water in the concrete chamber portion was not included in the total volume to allow for settled particulates. Also, the predicted TSS calculation would be under the TSS of 30mg/1 if only 872% of the basin volume below 99.5' contour was available. We appreciate your assistance with this matter. If you have any questions or need additional information, please contact our office. Thank you. Sincerely, r; Robert S. Bartlett, P.E. 2UIt;�?'4 . ',moo'•. FNGl�IE��' � S.T. WOOTEN-GOLDSBORO CONCRETE PLANT RECYCLE WASH -WATER BASIN CALCULATE PEAK FLOW FOR SITE (25YR PEAK FLOW -NOT 24HR STORM EVENT) Qp=CIA Qp = peals rate of runoff in cubic feet per second (cfs) C= coefficient of runoff 1=intensity of rainfall in inches per hour A=drainage area in acres Coefficient of runoff; C Rainfall Intensity; I Drainage Area; A Tc Peak Runoff; Qp Runoff Volume (25yr storm 6min duration) 0.76 = 8.64 inches/hour _ [2.96 acre 6 min 19.44 cfs 0.161 acre feet 6997 cu ft CALCULATE PROCESS WASTEWATER FLOW AT SITE Average work day = 10 hours Wash water produced = 5 gal/CY Anticipated plant production = 200 CYlday Wash water per day = 1000 gallon 1 gallon = 0.133681 cf Wash water per day =I 133.7 cf DETERMINE BASIN SIZE Total Volume of basin (96.0'-100.0')(cf) 24,216 Side Slope=3:1 Volume at weir elevation (96'5')'(cf) 119,642 Average Dimensions of the Surface of the Basin Length(ft) 200 Width(ft) .45 Avg. Surface Area of the Basin wl Chamber 9265 sq ft (99.5 countour) Weir Length (ft) 75 ft CALCULATE DEPTH OF FLOW OVER THE DISCHARGE WEIR By: Robert S. Bartlett, P.E. Bartlett Engineering and Surveying, PC Wilson, NC 27893 252-399-0704 25 year storm w/Tc=6min (see Hydrograph) H=[QI(3.1`L)]^0.66667 NOTE: BASIN NOT DESIGNED TO HOLD THE 25YR-24HR STORM EVENT H=Depth of Flow over weir in (ft) FOR 25YR PEAK FLOW, DISCHARGE DEPTH OVER WEIR--0.2FT Q=flow in cfs L=Length of weir (ft) Normal Operation (no rain) Qn= 0.004 cfs Hn= 0-5E1 ft During Rain Event Qp= 19.44 cfs Hp= 0.191 ft CALCULATE CRITICAL VELOCITY OF PARTICLES IN POND DURING PEAK FLOW Vc=Qp/A Vc=critical velocity in ft/sec Qp=peak flow A=average surface area of pond at overflow Critical Velocity (Vc)= 0.002098219 ft/sec Retention time of particle (Rp) during peak flow=Average Pond Length at SurfaceNc= Retention time(Rp) 95318.9 seconds Critical settling velocity (Vc*) for particle to settle to weir (rain)=Hp/Rp Critical settling velocity (Vc*) 1 2.00601 E-06 ft/sec DETERMINE WHICH SOLIDS WILL DISCHARGE OVER WEIR Focus will be on cement particles which are the least likely to settle and therefore the most likely to discharge due to their small size. Calculate particle settling velocity (Vp) and compare it to Vc*. If Vc*>Vp, then those solids will discharge over the weir Formula for calculating particle settling velocity (Vp) Particle settling velocity (ft/sec), Vp={2g(pl-p2)r^2)/(9u) Stokes Law g=gravity = 32.2 d=diameter of cement particle(ft) _ 1 micron = 3.28084E-06-ft r pl=density of cement = 94 lb/cf l ZtV� �� U C-V'� r - L' ( p2=density of water = 6Z..4-_lb/cf u=viscosity of water = 0.0005981 Ib/ft-sec Source: NISTIR 6931 "Analysis of the ASTM Round -Robin Test on Particle Size Distribution of Portland Cement; Phase 11 Particle Discharge Diameter size distribution diameter (ft) Settling Velocity Critical Settling Over Weir (microns) Vp (ft/sec) Velocity; Vc (ft/sec) (YIN) 1 4.7 4.7 3.28084E-06 1.01734E-06 2,00601 E-06 Y 1.5 2.6 7.3 > 4.92126E-06 2.28902E-06 2.00601 E-06 N 2 4.8 12.1 6.56168E-06 4.06937E-06 2.00601 E-06 N 3 5.6 17.7 9.84252E-06 9.15607E-06 2.00601E-06 N 4 4.6 22.3 1.31234E-05 1.62776E-05 2.00601 E-06 N 6 7.6 29.9 0.000019685 3.66241 E-05 2.00601 E-06 N 8 6 35.9 2.62467E-05 6.51098E-05 2.00601 E-06 N 12 10.5 46.4 3.93701 E-05 0.000146497 2,00601 E-06 N 16 8.2 54.6 5.24934E-05 0.000260439 2.00601 E-06 N 24 13.8 68.4 7.87402E-05 0.000585989 2.00601 E-06 N 32 10.3 78.7 0,000104987 0.00104176 2.00601 E-06 N 48 12.4 91.1 0,00015748 0.002343945 2.00601 E-06 N 64 5.2 96.3 0.000209974 0.00416704 2.00601 E-06 N 96 2.8 99.1 0.000314961 0.00937584 2.00601 E-06 N 128 0.4 99.5 0.000419948 0.016668161 2.00601 E-06 N > 128 0.5 100 - 2.00601 E-06 N Based on these calculations, particles less than 1.5 microns will discharge over the weir. Estimated amount of cement washed off each truck 0.5 lb/CY Mass of cement washed off trucks 100\b/day Mass of cement from drum washout 500 lb/day (See assumptions next page) ✓(�Ob ��S �a� yL"1 There will be 6-7 trucks used per day.` \ �"en Delvo will be used in drums between loads and also overnite most of the, time.Assume worst case half of trucks used (4) will wash drums out each day ,%Assume 0.25 CY of concrete will be washed out during drum washout. (500lbs of cement per CY or concrete) Mass of cement to discharge=Mass of cement washed off trucks each day /o f mass= 43.8 Ibs/day 19885200 mg/day Total Suspended Solids of Discharge (TSS)=Mass of cement (mg)/Volume of Basin b'726820 pool (99.5') (liters) TSS= 19885200 1 759458 liters Volume below weir (99.5') cu, f t. 5 ,f Anticipated Max.TSS (mg/1) 26.183 mg/I r �` �� vJ Max. TSS (mg/1) 30 mg/I Note: Volume of concrete basin not considered in these calculations and predicted TSS will be under 30mg1�7 with approximately 12.8% of the basin volume or 3420 cu.ft. taken up by settled solids. Basin would ✓��� need to be cleaned out when bottom elevation reads --95.8'. CALCULATE SETTLEABLE SOLIDS DISCHARGE Methodology for settleable solids measures the volume of settleable solids in an Imhoff cone after 60 minutes. An Imhoff cone is approximately 14-inches tall. Results are reported in ml/L. The following table calculates the time for particles to settle 1", 6", and 14". Diameter Settling Velocity 1" Settling 6" Settling 14" Settling (microns) (ft/sec) Time (min) Time (min) Time (min) 1 1.01734E-06 1365.21 8191.28 19113 1.5 2.28902E-06 606.76 3640.57 8494.67 2 4.06937E-06 341.3 2047.82 4778.25 3 9.15607E-06. 151.69 910.14 2123.67 4 1.62776E-05 85.33 511.96 1194.56 6 3,66241 E-05 37.92 227.54 530.92 From calculations above, particles 2 microns and smaller will take longer than 60 minutes to settle only 6". ��vU Anticipated Settleable Solids= 0 mlll Max. Allowable Settleable Solids 5 ml/L BASIN VOLUMES INCREMENTAL TOTAL STORAGE STORAGE l51'���" b� STAGE (FT) ELEVATION 0 95 (CU FT) (CU FT) 0 p�(� 0 1 96.0 4,088 4,088 2 97.0 5,072 9,160 117 3 98.0 6,152 15,312 rt 3.5 99.0 7,315 22,627 li� 4 99.5 4,193 26,820 5 100.0 4,484 31,304 COMMENTS 6 101.0 9,908 41,212 NOTE:The recycle basin is designed to provide adequate settling to meet effluent concentrations for V the 25yr intensity with pH adjustment and not designed o hold t 25yr 24hr storm event. J Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD® Civil 3D® 2008 by Autodesk, Inc. v6.052 Tuesday, Oct 14, 2008 Hyd. No. 1 Goldsboro Recycle Basin Hydrograph type = Rational Peak discharge = 19.44 cfs Storm frequency = 25 yrs Time to peak = 6 min Time interval = 1 min Hyd. volume = 6,997 cuft Drainage area = 2.960 ac Runoff coeff. = 0.76 Intensity = 8,640 inlhr Tc by User = 6.00 min OF Curve = Goldsboro NC NOAA ATLAS 14.IDF Asc/Rec limb fact = 111 r Q (cfs) 21.00 18,00 15.00 12.00 • M 3.00 Goldsboro Recycle Basin Hyd. No. 1 -- 25 Year Q (cfs) 21.00 18.00 15.00 12.00 . 90 3.00 0.00 i/ I I I I I 1 _ I I 1 ,�.1 1 ' 0.00 0 1 2 3 4 5 6 7 8 9 10 11 12 Hyd No. 1 Time (min) ST Wooten - Goldsboro (NCG 140380 ATC/COC Application) Subject: ST Wooten - Goldsboro (NCG 140380 ATC/COC Application) From: Bethany Georgoulias<Bethany.Georgoulias@ncmail.net> Date: Fri, 05 Sep 2008 12:29:21 -0400 To: ion@bartletteng.com CC: Butch Lawter <Butch@stwcorp.com>, Ken Pickle <ken.pickle@ncmaiLnet> Mr. Bartlett, Thank you for submitting the additional information for the above application. we received these materials from Mr. Lawter on August 21st. I have reviewed the information and still have some questions and concerns about the design. Could you please address the items below? If you have any questions or want to discuss any of these, feel free to give me a call. I'll be here until about 4 PM today, and then I'll be out Mon-Tue next week for a conference, but I return on Wednesday. Questions/add. info. needed: 1. You used.a C value of 0.7 for the stockpile area. This seems low since we would expect aggregate to be stored in this area, and the soil underneath those piles will become very compacted as a result (i.e., that area will be rather impervious). Could you explain why you chose this value for that area in the runoff calculations? 2. In the peak flow calculations, the weir length is specified as 20 feet. However, the plans indicate a 10-foot long weir. Could you please explain or correct this discrepancy? The value will affect the height above the weir in the design event (H) and ultimately the critical velocity. 3. On sheet RB2 of the plans, there is a pump and recycle water line indicated in the concrete chamber leading into the recycle basin (in addition to•the line and pump shown in the recycle basin itself); however, this line is not shown on sheet RB1. What is this line for, and where is water that is not going through the recycle basin being recycled to? 4. The maximum capacity of this plant has nearly doubled to 480 CY/day since the first submittal. was this a change in plans? 5. 0.5 lb/CY of cement off each truck is the assumption used to estimate the amount of cement potentially washed into the recycle basin. What is the basis of that number? (In past applications we have seen 10 or greater lbs assumed per CY, so this value seems low to us). 6. In your Stoke's Law calculation, you interpret the % value to mean the number of particles that diameter and smaller in the size distribution. Your calculations translate this into a much smaller volume and then equate -that to the percent mass (29.9% are 6 microns and smaller -> 0.028% volume -> 0.028% mass of cement). This is not a correct interpretation of the 29.9% -- that value refers to the percent *mass* of cement that contains particles 6 microns and smaller (not number of particles). This change will alter your final conclusion about the predicted TSS concentration and should be corrected. I am concerned that as the calculations stand, your design will not predict compliance with the TSS limit in the NCG14 permit. [Side note here -- keep in mind that you could also make an assumption about how the particles are vertically distributed through the water column, so that some will travel through the basin below the weir anyhow and not discharge. However, be sure to clearly state your assumptions.] 7. The final TSS calculation also uses the volume of runoff from the 25-year event *with a'�fi minute duration* as estimated by the hydrograph. This does not make sense to me. X o estimate the maximum concentration that will discharge when the basin fills up and begins to discharge over the weir, shouldn't the calculation be based on the [mass of cement]/[volume in basin below the weir]? in -addition, he basin volume you use should make an a llowan(f'E�—f"or—so[ne pa'rt:—(Yf—tn—e -basin to b'e"fiTled wi-fh particulates. —Even with regular clean -outs, some portion of—the—rEcyc-'ale basin is rlikely tc contain settled particles (i.e., less room for water). Please be sure to 1 of 2 9/5/2008 12:30 PM ST Wooten - Goldsboro (NCG 140380 ATC/COC Application) outline your assumptions. The final steps in the Stoke's Law calculation is a problem here because if the PSD percent is applied to the mass of particles currently assumed to discharge in the design, it will not predict compliance with TSS concentration of 30 mg/l. A revised volume will also affect the final demonstration of.compliance. Please resolve these issues and submit the additional information by September 30, 2008. If you have any questions, or need an extension to submit this information, Please let me know. Thanks so much for your help. Regards, Bethany Georgoulias Bethany Georgoulias Environmental Engineer NC DENR Division of Water Quality Stormwater Permitting Unit tel. (919) 807--6372 fax (919) 807-6494 VIA Y 0 cz�+OYVO CLUM . r2��b Tss coy'LC, �z ��V, C 6 Alt « tb Pe: C, �- � ��, k C� L,;."-1 Vo yl tAA-47 V O L W^� I ✓1 �QziL vv .%V, ,�- rl'u say Z of 2 iems. Vjk..P-S 9/5/2008 12:30 PM ST Wooten - Goldsboro (NCG 140380 ATC/COC Application) Subject: ST Wooten - Goldsboro (NCG 140380 ATC/COC Application) From: Bethany Georgoulias <Bethany.Georgoulias@nctnail.net> Date: Fri, 05 Sep 2008 12:29:21 -0400 To: ion@bartletteng.com CC: Butch Lawter <Butch a stwcorp.cotn>, Ken Pickle <ken.pickle@ncmail.net> Mr. Bartlett, Thank you for submitting the additional information for the above application. We received these materials from Mr. Lawter on August 21st. I have reviewed the information and still have some questions and concerns about the design. Could you please address the items below? If you have any questions or want to discuss any of these, feel free to give me a call. I'll be here until about 4 PM today, and then I'll be out Mon--Tue next week for a conference, but I return on Wednesday. Questions/add. info. needed: 1. You used a C value of 0.7 for the stockpile area. This seems low since we would expect aggregate to be stored in this area, and the soil underneath those piles will become very compacted as a result (i.e., that area will be rather impervious). Could you explain why you chose this value for that area in the runoff calculations? 2. In the peak flow calculations, the weir length is specified as 20 feet. However, the plans indicate a 10-Moot long weir. Could you please explain or correct this discrepancy? The value will affect the height above the weir in the design event (H) and ultimately the critical velocity. 3. On sheet RB2 of the plans, there is a pump and recycle water line indicated in the concrete chamber leading into the recycle basin (in addition to the line and pump shown in the recycle basin itself); however, this line is not shown on sheet RB1. What is this line for, and where is water that is not going through the recycle basin being recycled to? 4. The maximum capacity of this plant has nearly doubled to 480 CY/day since the first submittal. Was this a change in plans? 5. 0.5 lb/CY of cement off each truck is the assumption used to estimate the amount of cement potentially washed into the recycle basin. What is the basis of that number? (In past applications we have seen 10 or greater lbs assumed per CY, so this value seems low to us). 6. In your Stoke's Law calculation, you interpret the % value to mean the number of particles that diameter and smaller in the size distribution. Your calculations translate this into a much smaller volume and then equate that to the percent mass (29.9% are 6 microns and smaller -> 0.028% volume -> 0.028% mass of cement). This is not a correct interpretation of the 29.9% --- that value refers to the percent *mass* of cement that contains particles 6 microns and smaller (not number of particles). This change will alter your final conclusion about the predicted TSS concentration and should be corrected. I am concerned that as the calculations stand, your design will not predict compliance with the TSS limit in the NCG14 permit. [Side note here -- keep in mind that you could also make an assumption about how the particles are vertically distributed through the water column, so that some will travel through the basin below the weir anyhow and not discharge. However, be sure to clearly state your ssumptions.] rZ hgin to n �c� % �0 KA i vt j 7. The £i[�al TSS c lculatioalso uses thee�wolume of runoff from the 25-year event *with a minute duration* as estimated by the hydrograph. Thzs does not make sense to me.-1o estimate the maximum concentration that will discharge when the basin fills up and begins to discharge over the weir, shouldn't the calculation be based on the [mass of cement]/[volume in basin below the weir]? In addition, the basin volume you use should make an allowance for some part of the basin to be filled with particulates. Even with regular clean -outs, some portion of the recycle basin is likely to contain settled particles (i.e., less room for water). Please be sure to I of 2 9/5/2008 1230 PM ST Wooten - Goldsboro (NCG 140380 ATC/COC Application) outline your assumptions. The final steps in the Stoke's Law calculation is a problem here because if the PSD percent is applied to the mass of particles currently assumed to discharge in the design, it will not predict compliance with TSS concentration of 30 mg/l. A revised volume will also affect the final demonstration of compliance. Please resolve these issues and submit the additional information by September 30, 2008. if you have any questions, or need an extension to submit this information, please let me know. Thanks so much for your help. Regards, Bethany Georgoulias Bethany Georgoulias Environmental Engineer NC DENR Division of Water Quality Stormwater Permitting Unit tel. (919) 807-6372 fax (919) 807-6494 2 of 2 9/5/2008 12:30 PM NCG140380 - ST Wooten, Goldsboro Ready Mix ATC Review BAG, 913108 Recalc with p1 = 197 lb/cu. ft g p1 p2 (water) u (water) 32.2 197 62.4 0.000598 ft/sec"2 Iblcf, Iblcf, Iblft-sec PSD diameter (d) settling velocity vp discharge over %< microns d (feet) (ftlsec) weir? 1 3.28084E-06 4.33336E-06 discharges 1.5 4.92126E-06 9.75006E-06 discharges <12.1% 2 6.56168E-06 1.73334E-05 discharges <17.7% 3 9.84252E-06 3.90002E-05 settles 4 1.31234E-05 6.93338E-05 settles 6 1.9685E-05 0.000156001 settles 8 2.62467E-05 0,000277335 settles sRK- I ¢c�aorrc u AUG 8 1 2408 BAIiLETT ENGINEERING & SURVEYING, K 1906 Nash Street North Wilson, NC 27893-1726 Phone: (252) 399-0704 Fax: (252) 399-0804 jon@banletteng.com August 21, 2008 Raleigh Regional Office Department of Environment and Natural Resources Stormwater and General Permits Unit 1617 Mail Service Center Raleigh, NC 27699-1617 REFERENCE: S.T. WOOTEN CORPORATION-GOLDSBORO CONCRETE PLANT Ms. Georgoulias: Bartlett Engineering and Surveying on behalf of S.T. Wooten Corporation (S "M, presents the additional information request for the NCG 140380 NOI application. The additional information is discussed below. RECYCLE SYSTEM • Wasterwater input of 1,350 cu. ft. is based upon the amount used for vehicle equipment and cleaning. Drum washout is not included because Delvo stabilizer will be used in the drums between loadouts. • Wastewater inputs from stockpile wet -down are assumed negligible on a daily basis, however this area is included in peak flow calculations. • Recycled water piping and pump configuration are now shown on plans. ✓ • Automated pH system controller location is now shown on plans and will sample and adjust pH in the middle basin. RUNOFF VOLUME CALCULATIONS (Comments 1 and 2): Corrections have been made for calculations for peak runoff rate and runoff coefficient. Runoff coefficient calculation and corresponding areas are now shown on plans and included in the calculation information. In eak calculating_q�il�, a time of concentration of 6 minutes ways used which will slightly lower.peak flow ff(c of 5min will yield 26.76cfs_while Tc of 6min gives 25.48cfs). �^ • (Comment 3). After correcting for peak —runoff the hydrograph volume of 9172 cu. ft. was determined for the 25yr storm with duration of 6 ntru The recycle basin was not designed to hold the 25yr 24hr storm event which would result in a much larger runoff volume. The basin was designed to provide adequate settling to meet -effluent concentrations for the 25yr intensity with pH adj susttm tenten We appreciate your assistance with this matter. If you have any questions or need additional information, please contact our office. Thank you. Sincerely, Robert S. Bartlett, P.E. Enclosure S.T. WOOTEN-GOLDSBORO CONCRETE PLANT By: Robert S. Bartlett, P.E. RECYCLE WASH -WATER BASIN Bartlett Engineering and Surveying, PC CALCULATE PEAK FLOW FOR SITE (25YR PEAK FLOW -NOT 24HR STORM EVENT) Wilson, NC 27893 Qp=CIA 252-399-0704 Qp = peak rate of runoff in cubic feet per second (cfs) C= coefficient of runoff 1=intensity of rainfall in inches per hour yU ! A=drainage area in acres w< Coefficient of runoff; C = 0.71 Rainfall Intensity; 1 = 9.05 inches/hour 25 year storm Q - Drainage Area; A = 4.17 acres 2(o ,7 9 Tc = 6 min Peak Runoff;_Qp ' = 25.48 cfs UJiIi , Run" off Volume = 0,211 acre feet 5y� sstorm 6min duration} ( 1172 cu ft (see Hydrograph) ' -68607 g llons 259676 liters DETERMINE SEDIMENT BASIN SIZE Sedime�in Dimensions (See Hydrograph and Pond Sizing Output) _ Basi oB tto Dimensions Length(ft) 107 w Width(ft) 25.5 , Depth(ft) 4 i Total Volume of basin (cf) 16,304 Side Slope=3:1� Volume at weir elevation (99.0') (cf)' 6,498; - r Average Dimensions of the Surface of the Basin Length(ft) 113 Width(ft) 36 Avg. Surface Area of the Basin wl Chamber 4198 sq ft (99.0 countour) ` 20 ft `� t o, !� Weir Length (ft) CALCULATE PROCESS WASTEWATER FLOW AT SITE Average work day = 10-h6urs Wash water produced = Cgall - Maximum capacity of plant = 480`CYlday fd,, �! �,�{ S S Wash water per day = 2400 gallon C. 1 gallon = 0.133681 cf Wash water per day = 320.8 cf CALCULATE DEPTH OF FLOW OVER THE DISCHARGE WEIR H='j (3.1-L))^0.66667 NOTE: BASIN NOT DESIGNED TO HOLD THE 25YR-24HR STORM EVENT H=Depth of flow over weir in (ft) FOR 25YR PEAK FLOW, DISCHARGE DEPTH OVER WEIR-0.55FT Q=flow in cfs L=Length of weir (ft) Normal Operation (no rain) Qn= 0.009 cfs V, Hn= 0.003 ft ✓ During Rain Event Qp= 25.48 cfs, H p= 0.553 ft 1� ,177-7 �-o �-7 -7 wk- il j CALCULATE CRITICAL VELOCITY OF PARTICLES IN POND DURING PEAK FLOW �L Vc=Qp/A a Vc=critical-velocity in ft/sec - - Qp=peak flow vto--44 k A=average surface area of pond Critical Velocity (Vc)= 0.006068617 ft/sec ;i `tf ' &I ftk� 1?,t^ �j �$' S � ► (� in G� ye � Retention time of particle (Rp) during peak flow --Average Pond Length at 5urfaceNc= I13 Retention time(Rp) 18620.4 seconds Critical settling velocity (Vc") for particle to settle to weir (rain)=Hp/Rp - - �,,. L�V� L�i4 i v✓i 6�� >;t_7 Critical settling velocity (Vc") ✓ 2.96$27E-05 ftlsec . S�U;,,r OLotS DETERMINE WHICH SOLIDS WILL DISCHARGE OVER WEIR �17 yip} i 16w av•t Wl;r? Focus will be orf i ement particles which are the least likely to settle and therefore the most likely to discharge due to their small size . Calculate particle settling velocity (Vp) and compare it to Vc°. If Vc`>Vp, then those solids will discharge over the weir. Formula for calculating particle settling velocity (Vp) Particle settling velocity (ft/sec), Vp={Yg(p1-p2)r^2}/Q(u) ? Stokes Law g=gravity - 32.2 d=diameter of cement particle(ft) - 1 micron = 3.28084E-06-ft pl=density of cement = 9'4 Ib/cf p2=density of water = 62:4�Ib/cf u=viscosity of water = 0.0005981 Ib/ft-sec 2. 03 ,_ 10-6 zl Wow ok,� o, �) I ��V vQ- %V, J � �{ 5 Source: NISTIR 6931 "Analysis of the ASTM Round -Robin Test on Particle Size Distribution of Portland Cement; Phase II Discharge Diameter size distribution %< diameter (ft) Settling Velocity Critical Settling Over Weir (microns) ✓Vp (ft/sec) Velocity; Vc (ft/sec) (YIN) 1 4.7 4.7 3.28084E-06 1.01734E-06 2.96827E-05 Y •✓ 1.5 2.6 7.3 4.92126E-06 2.28902E-06 2.96827E-05 Y 2 4.8 12.1 6.56168E-06 4.06937E-06 2.96827E-05 Y 3 5.6 17.7 9.84252E-06 9.15607E-06 2.96827E-05 Y 4 4.6 122_ 1.31234E-05 1.62776E-05 2.96$27E-05 Y 6 7.6 29.9 0.000019685 3.66241 E-05 2.96827E-05 N 8 6 35.9 2.62467E-05 6.51098E-05 2.96827E-05 N 12 10.5 46.4 3.93701 E-05 0.000146497 2.96827E-05 N 16 8.2 54.6 5.24934E-05 0.000260439 2.96827E-05 N 24 13.8 68.4 7.87402E-05 0.000585989 2.96827E-05 N 32 10.3 78.7 0.000104987 0.00104176 2.96827E-05 N 48 12.4 91.1 0.00015748 0.002343945 2.96827E-05 N 64 5.2 96.3 0.000209974 0.00416704 2.96827E-05 N 96 2.8 99.1 0.000314961 0.00937584 2.96827E-05 N 128 0.4 99.5 0.000419948 0.016668161 2.96827E-05 N >128 0.5 100 - 2.96827E-05 N Based on these calculations, particles less than 6 microns will discharge over the weir. ��- �. 5c(i Sew i� �i fcYrec�-e�f) 0.5 Ib/CY f 1 t40 lb/day = 0.5`(42,0) Assume particles 6 microns and smaller will discharge: Volume o� Diameter size distribution %< Particle (microns) % (microns) 1 4.7 4.7 0.5230 1.5 2.6 7.3 1;-7660 2 4.8 12.1 4.1870 --0' 3 5.6 17.7 14.1300 4 6 4.6 7.629.9_ 22:3 33.4930 113.0400 pip 8 6---------- --=3_5:9=- 267.9470 �Y n 12 10.5 46.4 904.3200 Z ti 16 8.2 54.6 2143.5730 24 13.8 68.4 7234.5600 0 32 10.3 78.7 17148.5870 r 48 12.4 91.1 57876.4800 64 5.2 96.3 137188.6930 96 2.8 99.1 463011.8400 128 0.4 99.5 1097509.5470 >128 0.5 100 1097509.5470 r 17 _r Particles microns and smaller make up 29.9_% of the tot�1_pai the density of all the particles -is assumed the same, then parti(ic Estimated amount of cement washed off each truck Mass of'cement'washed -off 'trucks - Ont�r 5 Mass of cement to discharge=Mass of cement washed off trucks each da x %� of mass= y . 41 fy e. Z9 .i �l b Total Suspended Solids of Discharge TSS --Mass of.cement, m Nolume of Storm Runoff liters TSS= 30331 1 259676,� tg'39704�Y; IS Anticipated TSS (mg/1) 0.1 17mg/1 ftA Max. TSS (mg/1) 30 mgll CALCULATE SETTLEABLE SOLIDS DISCHARGE (�„�t os�l'�alt� QA`11 Methodology for settleable solids measures the volume of settleable solids in an Imhoff cone after 160 minutes. An Imhoff cone is approximately 14-inches tall. Results are reported in ml/L. The following table calculates the 0 � �vt^ time for particles to settle 1", 6", and 14". �V� JJ1AA � Diameter Settling Velocity 1" Settling 6" Settling 14" Settlingsq"S (microns) (ft/sec) Time (min) Time (min) Time (min) WJ GO-yk G- J � 1 1.01734E-06 1365.21 8191.28 19113 Iwi YN7C'S ajo- �� 1.5 2.28902E-06 606.76 3640.57 8494.67 2 4.06937E-06 341.3 2047.82 4778.25 3 9.15607E-06 151.69 910.14 2123.67 4 1.62776E-05 85.33 511.96- 1194.56 ? C�Op?^ °� v� �. y�J ,'� L IU 6 3.66241 E-05 37.92 227.54 530.92��i� wo''�" From calculations above, particles 6 microns and smaller will take longer than 60 minutes to settle only 6". Anticipated Settleable Solids= 0 mlll Vb Max. Allowable Settleable Solids 5 ml/L ` !/ Weighted Volume 0,0246 0,0459 0.2010 0.7913 1.5407 8.5910 16.0768 94.9536 175.7730 998.3693 1766.3045 7176.6835 7133.8120 12964.3315 4390.0382 5487.5477 40215.0846 Subtotal of Weighted Volume 0.0246 0.0705 0.2715 1.0628 2.6034 11.1945 27.2713 122.2249 297.9979 1296.3672 3062,6716 10239.3551 17373.1672 30337.4987 34727.5369 40215.0846 % Tota I Volume 0.000% 0.000% 0.001 % 0.003% 0.006% 0.028% 0.068% 0.304% 0.741 % 3.224% 7.616% 25.461 % 43.201 % 75.438% 86.355% 100.000% but only 0.028% of the total volume. Since microns and smaller also represent,0.028% '4 5�yp W24�� ez. i++.�c1•.- the mass. i dL2� a S 0.066807594 Ibs/day 30330.64761 mg/day BASIN VOLUMES INCREMENTAL TOTAL STORAGE STORAGE STAGE (FT) ELEVATION (CU FT) (CU FT) 0 97.0 0 0 lj�;vv� 2 99.0 6,498 6,498 rN2� r 4 -- 1-01.0' 1--� 9,806 16,304 COMMENTS NOTE:The recycle basin is designed to provide adequate settling to meet effluent concentrations for the 25yr intensity with pH adjustment and not designed to hold the 25yr 24hr storm event. COMPOSITE "C" VALUE DETERMINATION Q=CIA PROPOSED CONDITIONS "C" VALUE TOTAL ACRES 4.17 IMPERVIOUS AREAS 1.76 0.95 STOCKPILE AREAS 1.24 0.70 MANAGED PERVIOUS 1.17 0.35 COMPOSITE "C" VALUE 0.71 "C" VALUES OBTAINED FROM "DESIGN HYDROLOGY AND SEDIMENTOLOGY FOR SMALL CATCHMENTS" BY HAAN, BARFIELD, AND HAYES Hydrograph Report Hydraflow Hydrographs Extension for AUtoCAD® Civil 3D® 2008 by Autodesk, Inc. v6.052 Hyd. No. 4 Goldsboro Recycle Basin Hydrograph type = Rational Storm frequency = 25 yrs Time interval = 1 min Drainage area = 4.170 ac Intensity = 8.605 in/hr IDF Curve = Goldsboro NC NOAA ATLAS 14.IDF 24 20 16. 12 8 4 IN - Hyd No. 4 Wednesday, May 28, 2008 Peak discharge = 25.48 cfs Time to peak = 6 min Hyd. volume = 9,172 cult Runoff coeff. = 0.71 Tc by User = 6.00 min Asc/Rec limb fact = 111 Goldsboro Recycle Basin Hyd. No. 4 -- 25 Year Q (cfs) ''i.00 1.00 WO i.00 !.00 D0 D0 D0 Time (min) 5?(/ , . NC®ENR Nr Cv — tlo,.rtnorr or rjm 1 wew MW NAny Fkr— 1 cw Division of Water Quality / Surface Water Protection National Pollutant Discharge Elimination System NCG140000 FOR AGENCY USE ONLY Date Received Year Month Day /C e Cenificae of Coves 4' 3 O Check # Amount 122)1 D 1.� Permit Assigned to NOTICE OF INTENT National Pollutant Discharge Elimination System application for coverage under General Permit NCG140000: STORMWATER AND PROCESS WASTEWATER DISCHARGES associated with activities classified as: SIC (Standard Industrial Classification) Code - 3273 Ready Mixed Concrete For new plant sites that will discharge or recycle process wastewater (even if commingled with stormwater): This NOI is also an APPLICATION FOR Authorization to Construct (ATC) wastewater treatment facilities. ATC requests must be submitted at least 90 days prior to construction'. For existin plant sites discharging or recycling process wastewater (even if commingled with stormwater): This NO[ is also an APPLICATION FOR Authorization to continue to operate wastewater treatment facilities in place. Construction, modification, or installation of any new treatment components at an existing site requires an ATC. Treatment facilities used to treat or recycle process wastewater (including stormwater BMP structures treating process wastewater flows commingled with stormwater) require an ATC prior to construction per.15A NCAC 2H .0138.. The authorization to construct or continue to operate will be issued at the same time as the Certificate of Coverage (COC) for the NCG14 permit. Design of treatment faciliti o a must comply with requirements of 15A NCAC 2H .0138 & .0139. z n Z Construction of wastewater treatment facilities (this includes recycle systems) at new or existing plan sites requires submission of three (3) sets of plans and specifications signed and sealed by a a ,... Professional Engineer (P.E.) or qualified staff2 along with this application. A copy of the design calculations should be included. Please see questions 14 & 15. For questions, please contact the DWQ Regional Office for your area. (See page 5) (Please print or type) 1) Mailing address of owner/operator address to which all permit correspondence will be mailed)- Name S. W oarc tit cc5yo %Zh l Ic to Street Address 3$0� IkAC4-- CA-LLE 4 City W Spa State V1, ZIP Code L3 Sq'3 Telephone No. 2l2 Z91 "SI (oS Fax: 5 Z 2A-1- P9 01 2) Location of facility producing discharge: n Facility Name S• ac-'cEa OC.iuc.M f"V,t�, + Zo Facility Contact. f A'Svi't e� Street Address Z.Do� us EST City o2c State j4C.• ZIP Code County A,(bkE Telephone No. 9 A -73'a -' 3(07 Z _ Fax: 91 q - 31� - rage t of 5 'As per 15A'NCAC 2H .0106 2Unless treatment'facilities are designed, constructed, and put into operation by employees internal to the company who are qualified to perform such work for their respective companies in accordance with General Statutes, 89C-25 (7), plans and specifications must be signed and sealed by a P.E. _ SWU•229-091007 Last revised 09/10107 NCG140000 N-O.I. 3) Physical location information: Please provide a narrative description of how to get to the facility (use street names, state road numbers, and distance and direction fro a roadway intersection). 12epfA A(,f iA T416C u5 70fA5r a 2oS�Wua�6 wy to5N 5roPU(4i ZrAIUES BAST TALC LEFT W SOPL4414T AT' or- V570 (A copy of a county map or USGS quad sheet with facility clearly located on the map is a required part of this application.) 4) Latitude 35"24`4b.8Z" Longitude 78- 1' 49.74m (deg, min, sec) AADG-3 5) This NPDES Permit Application applies to which of the following: -ErNew or Proposed Facility ❑ Existing 6) Standard Industrial Classification: Date operation is to begin APiz) L Z 008 Provide the 4 digit Standard industrial Classification Code (SIC Code) that describes the primary industrial activity at this facility SIC Code: 3 Z -7 3 p-�40 PE2K:�t5 Mfu- 'Ao4y> 7) Provide a brief descrlption of the types of industrial activities and products produced at this facility: (Include a site diagram showing the process areas present at this facility.) PiZOOuX' lo" or- 'Ma"UY ►tiny- coat/ xct ogrrStof~. s��rtaC aF AGG C,A�E 8) Discharge points / Receiving waters: How many discharge points (ditches, pipes, channels, etc.) convey stormwater and/or wastewater from the property? 2- What is the name of the body or bodies of water (creek, stream, river, lake, etc.) that the facility stormwater and/or was discharges end up in? '4VF L f~D+Fl.bt. "-1cl€.� 1N 1,LTTLI VUf-- If the site stormwater.discharges to a separate storm sewer system, name the operator of the separate storm sewer system.(e.g. City of Raleigh municipal storm sewer). Receiving water classification (if known): �SW Nate: Discharge of process wastewater to receiving waters classified as WS-II to WS-V or SA must be approved by the N.C. Dept, of Environmental Health. If DEH does not approve, coverage under NCG140000 cannot be granted. No new discharges of process wastewater are permitted in receiving waters classified as WS-1 or freshwater ORW. 9) Does this facility have any other NPDES permits? ,eN O ❑ Yes If yes, list the permit numbers for all current NPDES permits for this facility: 10) Does this facility have any Non -Discharge permits (ex: recycle permits)? FeE'No ❑ Yes If yes, list the permit numbers for all current Non -Discharge permits for this facility: 11) Does this facility employ any best management practices for stormwater control? ❑ No If yes, please briefly describe: pR55 5WM'E S Page 2 of 5 SWU-229-091007 Last revised 0910712007 NCG140000 N.O.I. 12) Does this facility have a Stormwater Pollution Prevention Plan? ,01No Cl Yes If yes, when was it implemented? -S �' � � 6e Q Ov4p 13) Are vehicle maintenance activities occurring or planned at this facility? �No ❑ Yes Wastewater Treatment Design Information 04fz5- 14) Are discharges occurring or planned from any of the following process wastewater generating activities? Vehicle and equipment cleaning OYes ❑ No Wetting of raw material stockpiles OYes ❑ No Mixing drum cleaning OYes ❑ No If yes to any of the above, please describe the type of process used to treat and/or recycle the process wastewater. V ' 1fFor a sufficient application, you must provide design specifics (e.g., design volume, retention time, surface -" area, etc.).and calculations_ to demonstrate compliance with permit effluent limits (pH — 6-9 SU, Total Suspended Solids (TSS) — 30 'mg/i; and Settleable Solids (SS) — 5 mill.) [Use separate sheet(s)]. If all these discharges are recycled, please refer to Question 15. For plants that recycle and/or discharge process wastewater: . When applying for this permit, you are also applying for an authorization to construct (new treatment facilities) or authorization to continue to operate (existing treatment facilities) as part of the NOL For new sites, you must submit three (3) sets of design plans and specifications with this application and provide supporting calculations that predict compliance of final discharge with permit limits. For existing sites, applicants should submit three (3) sets of plaits and specs for facilities as -built and provide as many design details as possible, or submit a detailed diagram of treatment systems in place that includes information such as tank volumes, dimensions, retention time, piping, settling basin details, etc. .Please note: H new treatment systems are planned for an existing site, an ATC will be required prior to construction of those facilities. Plans/specs/calculations prepared by a P.E. and the request for an ATC. may be submitted with this NOI, or separately at a later date. DWO may request the status of your plans for requesting an ATC upon issuance of the COC. 15) Does.the facility use or plan to use a recycle system? ❑ No ,B�Yes If yes, what size storm event is the system designed to hold before overflowing? (for example, 10-yr, 24-hr) 2� year, 24-hr rainfall event For a recycle system (regardless of when it overflows), please provide plans, calculations, and design specifics (e.g., throughput assumptions/water balance, design volume, retention time, surface area, amount of freeboard in design storm event, etc.). [Use separate sheet(s)]. For a sufficient application; the information must demonstrate compliance of final discharge with permit effluent limits (pH - 6-9. SU, Total Suspended Solids (TSS) — 30 mgll, and Settleable Solids (SS) — 5 mlll), or 'must demonstrate that the recycle system has sufficient capacity to contain runoff from a 25-year, 24-hr rainfall event plus one foot of freeboard under design operating conditions. . Page 3 of 5 SWU-229-091007 Last revised 09/07/2007 May 6, 2008 Stormwater Permitting Unit Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Attention: Bethany Georgoulias Reference: Revised Signature NCG140000 Notice of Intent Goldsboro Concrete- Plant #20 _ Wayne County S.T. Wooten Corporation ear s. Georgoulias: Attached is the signature page for, the 'referenced site. If you have any additional questions, please contact me at 919-.422-3182.:, You can also contact me by email at butch@stwcorp.com r Sincerely, `s ' S. T. WOOTEN RPO ION. 1 f ^ R. S. (Butch) Lawter, Jr., Senior Engineer M rsl attachments PO Box 2408 WII.QrRY.Y�[�L�V�(/ATURE PAGE.DOC NCG140000 N.O.I. 16) Are wastewater treatment facilities (including recycle systems) planned in the 100-year flood plain? /`No 1.❑.Yes If s,o,:include information to demonstrate protection from flooding. (Minimum design requirements for treatment works include protection from the 100-year flood, per 15A NCAC 2H .0219.) 17) Hazardous Waste: a) Is this facility a Hazardous Waste Treatment, Storage, or Disposal Facility? ❑ Yes b) Is this facility a Small Quantity Generator (less than 1000 kg. of hazardous waste generated per month) of hazardous waste? ,O'No ❑ Yes c) is this facility a Large Quantity Generator (1000'kg: ormore of hazardous waste generated per.month) of hazardous waste? ,B'No ❑ Yes d) if you answered yes to questions b. or c., please provide the following information: Tvoe(s) of waste: How is material stored: Where is material stored: How many disposal shipments per year: Name of transport / disposal vendor: Vendor address: 18) Certification: North Carolina General Statute 143-215.6 B(l) provides that: Any person who knowingly makes any false statement, representation, or certification in any application, record, report, plan, or other document filed or required to be maintained under this Article or a rule implementing this Article; or who knowingly makes a false statement of a material fact in a rulemaking proceeding or contested case under this Article; or who falsifies, tampers with, or knowingly renders inaccurate any recording or monitoring device or method required to be operated or maintained under this Article or rules of the [Environmental Management] Commission implementing this Article shall be guilty of a Class 2 misdemeanor which may include a fine not to exceed ten thousand dollars ($10,000). I hereby request coverage.under the referenced General Permit. 1 understand that coverage under this permit will constitute the permit requirements for the discharge(s) and is enforceable in the same manner as an individual permit. I certify that I am familiar with the information contained in this application and that to the best of my knowledge and belief such information is true, complete, and accurate. Printed Name of PPson Signing:. moo(�X Title: Vl t ILVU5-st tb�j( of s� (Date Signed) Notice of Intent must be accompanied by a'check or money order for $100.00 made payable to: NCDENR Page 4 of 5 SWU-229-091007 Last revised 09/0712007 13 State of North Carolina Department of Environment and Natural Resources Washington Regional Office Michael F. Easley, Govemor, William G. Ross, Jr., Secretary DIVISION OF LAND RESOURCES LAND QUALITY SECTION November 14, 2007 LETTER OF APPROVAL WITH MODIFICATION S.T. Wooten Corporation Attu Doug K. Sutton Post Office Box 2408 Wilson, North Carolina 27894-2408 RE: Erosion and Sedimentation Control Plan No. WAYNE-2008-016 S.T. Wooten Concrete Plant #20 = Goldsboro US Hwy 70 West = Wayne County River Basin: Neuse Date Received: October 16, 2007 Responsible Party: S.T. Wooten Corporation Dear Sir: This office has completed its review of the erosion and' sedimentation control plan for the referenced 8.4-acre distusfiancc. Based on the information provided, we have determined the submitted plan for the Wooten Concrete Plant No. 20, dated August 2007, last revised September 11, 2007, if properly implemented and responsibly maintained, should meet the intent and minimum requirements of the Act. We, therefore, issue this LETTER OF APPRQyAL• WITH MQDIFICATION. Silt fence detail provided in submission does not conform to the. acceptable standard detail. Enclosed for your reference is the standard detail from the Erosion and Sedimentation Control Manual. Measures shown in this detail must be incorporated into Construction Plans. In 1973, the Sedimentation Pollution Control Act (copy available upon request) was enacted. It established a perfornrance oriented program with the OBJECTIVE of PREVENTING SEDIMENT DAMAGE to adjoining properties and/or natural resources resulting from land disturbing activities through the use of reasonable and appropriate Best Land Management Practices, based on the approved plan- and changing site conditions, during the course of the project. AS THE DECLARED RESPONSIBLE PARTY, YOUR LEGAL RESPONSIBILITY is to understand the Act and comply with the following mm mum requirements of the Act and the above listed modifications (if any): -- an erosion and sedimentation control plan is only valid for 3 years following the date of initial approval, tf no land -disturbing activity has been undertaken; 943 Washington Square mall, Washington, North Carolina 27899 Telephona 252-946-6481, FAX 252- 975.3716 An Equal Opportunity Employar 50%recycledllo%past-consumer paper S.T. Wooten Corporation Attn: Doug K. Sutton November 14, 2007 Page 2 the,. -LATEST APPROVED soil erosion and sediment control plan will be used during inspection to.determine compliance and a copy of the plan must be on file at the job site; erosion and sediment control measures or devices are to be installed to safely withstand the runoff resulting from a 10 year storm event - 6.5 - 7 inches in 24 hours or at the rate of 6.5 - 7 inches in 1 hour. -- unless the .of"site borrow andlor disposal sites are identified in the erosion control plan, no earthen material is to be brought on or removed from the project site; except in the case of a storm related emergency, a revised erosion and sedimentation control plan must be submitted to and approved by this office prior to initialing any significant changes in the construction, grading or drainage plans; a buffer zone; sufficient to restrain visible sedimentation, must be provided and maintained between the land -disturbing activity and any adjacent property or watercourse; -- new or affected cut or filled slopes must be at an angle that can be retained by vegetative cover, AND must be provided with a (round cover suj)"rcient to restrain erosion within 21 calendar du s of conwledon of an U phase (rough or tah o radin (RYE G&.SkS_ LS _NOT in the APPROVED seeding specifications NOR is it an ACCEPTABLE substitute for the providing of a temporary ground cover); the CERTYFICATE OF PLAN APPROVAL must be posted at the primary entrance to the job site and remain until the site is permanently stabilized,• unless a temporary, martufactured lining material has been specoed, a clean straw mulch must be applied, at the minimum rate of 2 tons/acre, to all seeded areas. The mulch must cover at least 75% of the seeded area after it is either tacked, with an acceptable tacking material, or crimped in place; -- in order 'to -comply with the intent of the Act, the scheduling of the land - disturbing activities is to be such that both the area of exposure and the time between the land disturbance and the providing of aground coverts minimized; S.T °Wooten Carpciration . Attn: Doug K. Sutton November 14; 2007 Page 3 -- a permanent jeround cover, sufficient restrain erosion, must be provided within the shorter of 1.5 working or 90 calendar days after completion of construction or development on any portion of the tract (RYE GRASS IS NOT in the APPROVED seeding specifications NOR is it an .ACCEPTABLE substitute for the providing ofa nurse cover for the permanent grass cover); and, -- this approval is baser) in part, on the accuracy of the information provided in the .Financial Responsibility/Ownership form submitted with the project plans_ You are required to file an amended form f there is any change in the information included on the form. This approval and the financial responsibility/liability cited in it does not automatically transfer with a change in project ownership. Be advised that to ensure. compliance with the approved plan and the program requirements, unannounced periodic inspections will be made. If it is determined that the implemented plan is inadequate, this office may require the installation of additional measures and/or that the plan be revised to comply with state law. (Note: Revisions to the scope of this project without prior approval of the plan showing the changes can be considered a violation). Failure to comply with any part of the approved plan or with any requirements of this program could result in the taking of appropriate legal action (civil or criminal) against the financially responsible party (S.T. Wooten Corporation). Some options are Stop Work Orders and the assessing of a civil penalty of up to $5000 for the initial violation plus up to $5000 per day for each clay the. site is out of compliance. In recognizing the desirability of early coordination of sedimentation control, we believe it would be beneficial for you and your contractor to arrange a preconstruction conference to discuss the ,requirements of the approved erosion and sedimentation control plan, Prior to beginning this project, YOU ARE REQUIRED TO either CONTACT THIS OFFICE TO ADVISE GARY NOVAK (252- 946-6481, ext. 3860) OF THE CONSTRUCTION START-UP DATE, contractor and on -site contact person OR complete and return the attached Project Information Sheet to the above named. Acceptance and approval of this plan is conditioned upon your compliance with Federal and State water quality laws, regulations and rules. In addition, the land disturbing activity described in this plan may also require approval or permitting from other agencies - Federal, State or local. These could include the U.S. Army Corps of Engineers under Article 4.0.4.jurisdiction, the Division of Water Quality - Surface. Water Section under stormwater regulations (contact the Stormwater group at 252-946-6481), county, city or town agencies under other focal ordinances, or other approvals that may be required. This angeovA oes ng-supersede a,, j o r annrovaI or permit. Please be advised that a rule to protect and maintain existing buffers along watercourses in the Neuse River Basin became effective, on July 22, 1997. The Neuse River Riparian Area Protection and Maintenance Rule (15A NCAC 2B.0233) applies to a 50 (horizontal) foot wide zone along all percnnial and intermittent streams, lakes, ponds and estuaries in the Neuse River basin. In riparian areas, the rule prohibits land disturbance, new development and fertilizer use in the first 30 (horizontal) feet directly adjacent to the stream and/or coastal wetland vegetation. Clearing, seeding and a one-time fertilizer use to establish the grass is allowed within -the riparian area 20 feet landward of the first 30 feet of riparian S.T. Wooten Corporation Attn: Doug K. Sutton November,14, 2007' Page 4 area, but new development is prohibited. For more information about the riparian area rule, please contact the Division of Water Quality's Wetland/401 Unit at 919-733-1786. Please be advised that all land -disturbing activities affecting 1 or more acres are required to have a (Federal) NPDES permit. Enclosed is the Construction Activities General NPDES Permit - NCG010000 for this project. The responsibility for understanding and complying with this permit rests with you, the financially responsible party. Be aware that failure to comply with this permit could result in both the State and Federal governments taking appropriate legal action. Contact the Division of Water Quality - Surface Water Section at (252) 946-6481 should you have any questions regarding monitoring and record keeping requirements of the permit. Sincerely, Heather L. Steinbacher Assistant Regional Engineer enclosure w/o enc. cc: David R- Beaman, Bartlett Engineering & Surveying, PC Altos Hodge, Division of Water Quality Practice Standards and Specifications 8' max. standard strength fabric with wire fence 6' ftm. extra strength fabric without wire fence Steel post ,• r• ;u a Plastic or wire ties 18-24" Wire fence Natural ground dawn .,4" f onward, along 24" the trench Filter fabric Wire steel post 24" Figure 6.62a Installation detail of a sediment fence. Rev. 6/06 Cross -Section View Filter fabric Backfill trench Natural and compact c ground r/ thoroughly •.. Uprtope min+.• ..• �•+• ••. . O min 6.62.5 OWNER: PROJECT NAME: COUNTY: START-UP DATE: CONTRACTOR - ON -SITE CONTACT: ON -SITE PHONE NO.: OFFICE PHONE NO.: S.T oo-t@g CoMration W43me NO.: 2008-0I6 T cZOAA,PLE-Z zg PLEASE COMPLETE & RETURN TO: N.C.D.E.N.R LAND QUALITY SECTION ATTN: GARY NOVAK 943 WASHINGTON SQUARE MALL WASHINGTON, NORTH CAROLINA 27889 CERTIFICATE OF PLAN APPROVAL The 'postirig Yof this certificate certifies that an erosion and sedimentation control plan has been approved for this project by the North Carolina Department of Environment and Natural Resources in accordance with North Carolina General Statute 11.3A - 57 (4) and 113A - 54 (d) (4) and North Carolina Administrative Code, Title 15A, Chapter 4B.0107 .(c). This certificate must - be posted at the primary entrance of the job site before construction begins and until establishment of permanent groundcover as required by North Carolina Administrative Code Title 15A, Chapter 4B.0127 (b) Date of Plan Approval Project Name and Location 0T."A NCDEFR Regional Engineer Print Map Page 1 of 1 Map for GIS User Location of S. T. Wooten Concrete Plant 420 .• f-f ,\ -» ; � ate\ t z2�\ • I 'aN 1 "� '�� � 1., ��.. it .J'/'`.�.r. ,-Y �,��` "�• ' � { i+•• FBrk ,s r �- }• `i fir-. , ,s rt�%`�,` if ar , a.: �.5.+ ` i , f s; 1, 3 Jai 4r 9. S. T. Wooten Concrete Plant*2D NT- .11Xt , .. •� iI • f ter. :i.<__ •�.•.-,. t�o� Z__ �' :i"'�rr- �• -';�':'t�. ,��..��\ � .'�, v .,� �y� it _;';; _ -'rw � I, •, � . * ESN+" "- -A. , f!!'`.;£i : A. ky f / ti 1�°V'V,[ �j •' 'fir f' ~ 11�I ~IY. -•+ Y�� r ,5; ' 1:24,000 Northwest Goldsboro 7.5-minute Quadrangle Index map NC SPCS E: 697621.4, N:184723.2 meters (NAD83) Long:-78.0307887 W, Lat: 35.4113466 N (NAD83) http://gis.enr.state.nc.us/topoviewer/gisprint.jsp 3/28/2008 ATTACHMENT C ENCTEVEEPS CERTInCA'IION OF THE MODEL 5000-S PH.' MONITORING AND CONTROL SYSTW . By: G.C. Environmental Inc. P.O. B& 4OI25 Raleigh -MC 23-6219 For. Fortrans Inc. P_O. Box 40 Wendell, NC 27591 . Dated: ,September 11, 2003 G. Ca Environmental, Inc. 5312 Pinewood Court Wendell, NC 27591 (919) 266-2864 September I1; 2003 PURPOSE 4i of _ �w�Fi� 3�i111'ST1%SLl. .G.C. Environmental, Inc., was contracted to provide an engineers review and certification that the Model 5000-5 pH Monitor and Control System,manufaotured by Coastal Carolina. Supply in Morehead City, NC, could effectively provide on'a continuous basis, an ave;rage,pH range of 5-9 units on.the supernate layer of a.stormwater/ inse water sedime Cation basin typically found at Redi- mix concrete facilities. SCOPEOle WORK During the week of August 11, 2003, G:C. Environmental, Inc., witnessed the operation oftheModel 5000-5 self-contained pH Monitoring -and Contra] System -at a Redd mix .plant located in,Durham, NC_ During the two (2) day test program; measurements were ariade within the facilities stormwater/rinse water sedimentation basin for pK temperature --and depth (both supeinate.and sludge). -During the first day of testing, the basin was found to be heavily loaded vrith solids,and adjustments were inane to the solids,blanket to complete testing' the1�oIlowing day. '-NEST MMTHODOLOGY A .primary .sedimentatiori basin -located -at a Redi-mix concrete .plant located ie Durham, NC was . treated utiEzing the Model 5000-5 pH Monitor and Control System. During, the test program, the basin was, on a semi -continuous .basis, being fed rinm water from the exterior Cleaning of pert trucks. -Measurements for pig ternperature)'supernate and sludge blankets were made within the sedimentation basin. Initial pH measurements showed pH levels -of at least .12;0 units. The sedimentatiob basin was rectangular in shape with concrete walls and bottom The basin -ranged in depth of 1" at the inlet to approximately 3' at the deepest point. Sludge measurements within the basin showed that at least 2/3 of the basins d_ epth was comprised of sludge and -the "remainder supernate. The Model 5000-5 .pH Mionitor, and Control, System was setup at the rectangular sedimentation basin with the intake and discharge hoses situated at opposite ends of the basin. Both the intake and discharge lines were set at depths -within the supernate layer•of thebasin. A clockwise flow pattern was established once the unit began operation .and pH.and temperature measurements were made at several locations throughout the supemate layer of -the sedimentation basin Approxdinately eighteen 1(1 S) pH- and temp erature measurements were collected with a mean pH value -of 9.56 and mean temperature values o€3 0.94 DC. The pH system was left to.ron essentially on a continuous basis over •a four (4)'hour period:. An estimated volume wasting within the sedimeptation basin was?5, 000 gallons with a little over 8000 gallons consisting of relatively clear superriate. The amount of 25% Sulfuric acid (H,SO4) used to treat the sedimentation basins supernate was approximately l 5-20 gallons. MODEL 5060-S PH MO-NI70R AND CONTROL SYSTEM The model 50OD-S pH•Monifor and Control System is -comprised of Hayward Power Flow II (,^14 hg, 56 GPM) centrifugal pump which delivers rave water to a completely contained pH sensor connected to a pH meter equipped with control relays which operate two (2) stenner (60 GPD) acid ..-injection pumps. The acid 25%H.,SO4 is injected into the pump discharge line which empties inm the :sedimentation basin. Sulfuric acid is delivered to the system by 15 gallon carbuoys located outside of the fiberglass weatherproof enclosure which houses all ofthe aforementioned equipment. On top of the'enclosed is an alarm'light which is tied into. the pH meter. which is activated when pH levels .exceed 8.5 pH units or are below 6.0 units. CONCLUSION '1..The Model 5000-S pH Monitor and Control System is an effective system for the PH balancing ofsedimentationbasins.whichare used to Coll ect•stormwaterrunoffandrinsewater, commonlyfound _." at Red -mix concrete plants: .2. During the test program an average pH of 8.5.4 units was measured in the, subject sedimentation basin with a range of 7.95• to 9.34 measured. 3.:Sludge levels existing within the rectangular sedimentation ranged from 6.0 inches to 2:0 feet. PE Valdes after pH stabilization at the sludge/supernate interface were approxnnately 12.O.ur;its 4. For this .test proFam, approximately 180 rnSA of sulfates were added to the sedimentation basin as a result of pH adjustment with 25% sulfuric :acid. .5. The 5000=S pHMonitor and Control Systemis hilly automated and proyides apH ad_ jested waste -water which could e$e dvely be reused within the Redi-mix concrete industry. Automatic pH ContriA Systems Rortr "ns. MarlufacturdrofSafo 81od'egradW6. Cfl~anirig Chdtnitm andplH Control Sysfarhs Concrete Rerhovcrs Mortarman• Concrete R enloverT" Mortartnon Dne Shot"' Mortarman Safe Soap," f4bttarrman Safe soap" iI Fortrans 400 Truck Wash Automotive Products Car Baby Cherry Car Soap Grease siaster Fortrans 406 Car Wash Slick Trich Mcitbrcycle Cleaners ' Hawt�Wash pH Control Systems Model 50005 ModeI s000si< Infarmail6n About Fortrans Contact Us, Request A quote Blddegradahle i hro sercty A6ut,t us pH CONTROL SYSTtMS rage 1 or Toll Free: Inlo0fortrans.b1z Henry. Virtgitiia Wendell, North Carolina Contact Us Request Quote Home ForhanS pH CONTROL SYSTEMS ARE OMPLETEL YA UTOMA T!C They continually rhbriltorltest the pH of the Influent water and compares it to the pH setting of the control unit. If a change in pH is detected, the' contrblfer activates the.solenold valve for the CO2. The'pH adjustment chemical is theri fed 10 the return side of the circulation pump'until the pH is again at the proper level set at the controller. The unit will continuously circulate the water Until a charige in OH Is detected and the treatment cycle begins once again. the unit also features a digital pH meter connected to a probe in the sample cell to ensure unit is functioning properly and'that the correct phi level id -Maintained. Our systertis offer precise monitoring and control of the pH In settling basins, lagoons and othor outfall oontainnieint dovlces: ' The pH CONTROL SYSTEMS will treat up to 57 .gallons per minute - max-20' head pressure. Unique water circulation design eliminates the need for separate neutralization tank. im 1.5" quick connect fittings on inlet'and return for' easy hook-up. The standard unit Is equipped with 2-20' sections of 1.5" flexible hose with quick connect fittings. Inlet and outlet fittings at the basin -or lagoon are per our specifications. + unit is shipped cornpletely asserribled. The chemical controller.is preprogramrhed to maintain a pH of 7.5. ,lust altach hoses and PVC fittihS. 0 1 year warranty on all corhpohent parts and . housing. The pH CONTROL SYSTEMS are designed to treat and maintain a specified pH level in a body of water casually 100,000 gallons or less to allow the permitted discharge of. treated water to the environment. Permits must be obtained from the local governing agency to allow any discharge to the environment. Treated water may lee used for wetting of rock andloe dust control to aid compliance with storm water run off regulations. Treated water may be. used in water recyciing systems. http://www.forh-aLnS.biz/PHContioi.htm 7/19/2005 Automatic pH Control systelris HOME o • - , - a i • AIR out {' .:.`•r_,5d a , �'M e'er t�, �. � Y ,� � i-ti St' � Y'a <' ri• � S • • 0 i 9 •'System r -r pH monitorand 6ontro house• and circulation • • .-The sy�tem is CohfIgured for carbondioxido, gas opera ition. lattp:/Iwurw:aztsans.liiilPHCoiiLto�.fatiri : '. 7/19/2005 Aatbrraatic-pH Control. Systems The. Model 5000-SK Skid Mouhted pH Cohttol System cokitaifiis all of the 9nstrumbhtatlon end corrtponenta of the regular Model 5000-S System and 16 bhlpped on a 44"W" plastic skid With durable solid plastic surface. The Control Panel is provided loose with all components Installed and is designed to be attached to an interior wall of the control building. The tubing to the sample cell and from the CO2 solenoid valve to the 5porget "stone fed assembly must be Inserted after receipt of the unit. The systems features a 115V-30Ai-np Breaker Box and two GFCI receptacles. The'system-Is shipped with a CO2 feed system. Copyright m 200 - Fvrtrans, Inc. - 3800 original Henry ftbad,' Heriry, Virginia tVA) 24102 Page 3 of 3 http:llWww:fortran.s.-bi7ipHCotitrol.h in 7/19/2005 Fortrans... 3800 Original Henry Rd., P.O. Box 759 Henry, Va.24102 877.387.8509-• WWW.tDrtrans.biz Mr. Jimmy Washburn S.T. Wooten Corp. PO Box 2408 Wilson, NC 27874-2408 Dear Mr. Washburn, .1 have enclosed the Engineers Certiticaiion of the Model 5000S .pH Control System. Please note that several changes have been made insofar as manufacturing and materials used to adjust pH. Initially, Fortrans Inc had a manufacturing agreement with Coastal Carolina Supply wherein Fortrans Inc. was responsible forthe marketing of the pH Control Systems and Coastal Carolina Supply was responsible forthe. manufacturing of the systems: _Fortrans Inc. now designs and -manufactures1he-systems. Coastal .'Carolina -has signed a non -compete :in the .design and-.mandacture of pH control systems for the ready:rrixed concrete and related -industries Fortrans Inc. no longer designs:systerns that use:sulfuric acid to -lower pH. All of our systems .now utilize CO2 feed systems. CO2.<is:less expensive, safer and readily available to -the industry. Regardless of what chemical is .used tor control -pH, the Model :5000S and Model 500OSk (Skid Mounted) work the same way to -monitor and control .the pH to settling basins_,.lagoons, and other containment to effectivefy_controI the -pH - in -those areas: .l appreciate your.comments today relating to our -systems -performance at your facilities to date anti `fook forward to serving S.T.-Wooten Corp. needs in'the future. Please call me if you have any questions or -if I may be of service .n any way. Sincerely, Robert C. Cooke, Pres. .Fortran Inc. Makers oT these line products.: • .5WOS pH Control System . Mortasmari- 4;oncrete Remover -Sate Soap ii" -Sate Soap" - Gar baby -Cherry Gar Soap` .-Grease Blaster"--rruckWash-Fortrans 400''-SlicMice •SuperSlie • Wood Revive" Motorcycle Cleaners =Hawg Wa'sh'-RocketWash' -Spray Brighf' Re: Add Info. Request for Goldsboro Plant (App No. NCG 140380) Subject: Re. Add Info. Request for Goldsboro Plant (App No. NCG140380) From: Bethany Georgoulias<Bethany.GeorgouIias@ncmai1.net> Date: Tue, 01 Jul 2008 1 1:15:45 -0400 To: Butch Lawter <Butch@stwcorp.com> Butch, That's all right. Thanks for letting us know. We'll look for it by July 18th. Regards, Bethany Georgoulias Butch Lawter wrote: Bethany, We are going to need additional time to get additional information together. I was swamped last week when I got back from vacation and our concrete plant operations manager is out this week. Can we have until Friday the July 18 to get it in? Thanks. -----Original Message ----- From: Bethany Georgoulias [mailto:Bethan .Geor oulias@ncmail.net] Sent: Tuesday, June 17, 2008 7:53 AM To: Butch Lawter Subject: Re: Add Info. Request for Goldsboro Plant (App No. NCG140380) That's no problem. We'll extend the deadline to June 30th. Please let me know if you need additional time. Butch Lawter wrote: If Bethany, We do need an extension. Is the end of the month too much? I am on vacation and won't be back until next monday. Let me know. Thanks. ----- Original Message ----- From: Bethany Georgoulias <Bethan .Gear oulias@ncmail.net> To. Butch'Lawter Sent: Mon Jun 16 16:25:49 2008 Subject: Re: Add Info. Request for Goldsboro Plant (App No. NCG140380) Butch, We haven't seen any additional information for this application yet. you need an extension from the June 11th date, please let me know. If we don't receive either the additional information or a request for an extension, we'll have to return the application. Thanks, Bethany Georgoulias Bethany Georgoulias wrote: Butch, I finished putting together the Add Info. request on the submittal for 1 of 7/l/2008 l 1:16 AM Re: Add Info. Request for Goldsboro Plant (App No. NCG140380) Subject: Re: Add Info. Request for Goldsboro Plant (App No. NCG 140380) From: Bethany Georgoulias<Bethany.Georgoulias@ncmail.net> Date: Tue, 17 Jun 2008 07:52.37 -0400 To: Butch Lawter <Butch@stwcorp.com> That's no problem. We'll extend the deadline to June 30th. Please let me know if you need additional time. Butch Lawter wrote: Bethany, We do need an extension. Is the end of the month too much? I am on vacation and won't be back until next monday. Let me know. Thanks. ----- Original Message ----- From: Bethany Georgoulias <Bethany.Georgoulias@ncmail.net> To: Butch Lawter Sent: Mon Jun 16 16:25:49 2008 Subject: Re: Add Info. Request for Goldsboro Plant (App No. NCG140380) Butch, We haven't seen any additional information for this application yet_ If you need an extension from the June llth date, please let me know. If we don't receive either the additional information or a request for an extension, we'll have to return the application. Thanks, Bethany Georgoulias Bethany Georgoulias wrote: > Butch, > I finished putting together the Add Info. request on the submittal for > the Goldsboro plant and put it in the mail today. I'm attaching a > copy to this e-mail for you, but a hard copy should be on its way. I > also copied Mr. Robert Bartlett, since these are primarily things > he'll need to address in the design calcs and plans. If you have > questions after you've had a chance to review it, let me know. > Regards, > Be'thany Georgoulias > Bethany Georgoulias wrote: >> Sure, if you want to go ahead and get that to me, that would be fine. >> Thanks, >> Bethany >> Butch Lawter wrote: >>> Regarding the Goldsboro permit, do you want me to go ahead and get that >>> to you? Bethany Georgoulias Environmental Engineer NC DENR Division of Water Quality Stormwater Permitting Unit tel. (919) 733-5083, ext. 529 fax (919) 733-9612 1 of 2 6/17/2008 7:52 AM Re: Add Info. Request for Goldsboro Plant (App No. NCG 140380) Bethany Georgoulias Environmental Engineer NC DENR Division of Water Quality Stormwater Permitting Unit tel. (919) 733-5083, ext. 529 fax (919) 733-9612 2 of 2 6/17/2008 7:52 AM Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources Coleen H. Sullins, Director Division of Water Quality May 8, 2008 R. S. (Butch) Lawter, Jr. S. T. Wooten Corporation 3801 Black Creek Road Wilson, North Carolina 27893 Subject: NPDES Stormwater General Permit Additional Information Request NCG140380 NOI Application --- Goldsboro Concrete Plant #20 Wayne County Dear Mr. Lawter: On April 16, 2008, The Division of Water Quality's Stormwater Permitting Unit received your application and request for coverage under NCG140000 and an authorization to construct (ATC) wastewater treatment facilities. After review of the submitted materials, the Division is requesting additional information to complete processing this permit application: Recycle System °` • The wastewater inputs (1,350 cu. ft) are based on the amount of water used to wash trucks per each cubic yard of concrete produced. Does this quantity include only mixing drum washout, or also vehicle and equipment cleaning (e.g., from proposed wash down area)? r • The wastewater inputs do not include any amount draining from aggregate stockpile wet -down. If a negligible amount is assumed to drain from here on a daily basis, please clarify this assumption in the calculations. Otherwise, please provide an estimated contribution. ✓ • How/where will the water from the recycle system be routed back into the production process? Please explain the configuration and show related piping, pumps, etc. on the plans. /a Where (which chamber) in the recycle system will the automated pH system be installed and pH be adjusted? Please include this detail on the plans. Runo Volume Calculations and Recycling Chamber Capacity • Please address or correct discrepancies of numbers in the calculations. For example, the cover letter notes an operating volume of 6,549 cu. ft; however, calculations for the Recycle Wash - Water Basin indicate a volume at the weir of 6,-498 cu. ft. Also, the Hydrograph Report notes a rainfall intensity for the 25-year storm as 8.605 in/hr, but the peak runoff volume calculations cite 9.05 in/hr (which is consistent with NOAA data for the Goldsboro area). In addition, calculations show peak runoff volume (Qp) as 17.94 cfs (correct if 8.605 in/hr used), but a Qp corresponding to 9.05 in/hr intensity would be 18.87 cfs. N°ic Carolina ,VaiUrall,ff North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone (919) 733-7015 Customer Service Internet h2o.enr.state.nc.us 512 N. Salisbury St. Raleigh, NC 27604 FAX (919) 733-2496 1-877-623-6748 An Equal opportunity/Affirmative Action Employer — 50% Recycled/10% Post Consumer Paper R.S. (Butch) Lawter, Jr. S.T. Wooten Corporation Additional Information Request May 8, 2008 The runoff coefficient appears too low for this type of land use and amount of proposed imperviousness. Much of the 4.17 acres here will be paved, graveled, or covered in stockpile materials, all of which should be considered impervious area. Also, if a composite runoff coefficient was used, there is no information about how C = 0.5 was derived. (Note that when using the rational method to estimate runoff volume, runoff coefficients should not be composited; runoff volumes should be calculated separately and added.) Please outline assumptions about the coefficient used, references used to obtain that coefficient, and/or modify calculations of runoff volume. • The hydrograph estimates a runoff volume of 6,459 cu. ft. This value appears to be a significant underestimate the amount of runoff expected in a 25-year, 24-hour event in this area (approximately 7.24 inches, according to NOAA data). A rough estimate that assumes 80 percent of the rainfall falling on 4.17 acres in a 25-year event enters the recycle system (80 is just as an example — a higher percentage may be more appropriate, depending on amount of imperviousness) yields over 87,600 cu. ft of runoff. This value is based on a more simplified calculation of: [(percent imperviousness) x (depth of rainfall) x (drainage area)]. While this approach may over -predict runoff, we would not expect the result to be orders of magnitude greater than a hydrograph analysis. Modifying the rational runoff coefficient to better reflect the imperviousness at the plant site may bring the hydrograph volume estimate up to a more realistic value. However; if the hydrograph result is largely discrepant with the amount of runoff estimated by the more simplified calculation of runoff based on depth, drainage area, and imperviousness, you should present an explanation about the assumptions and equations in the hydrograph calculations. If the estimated peak flow and runoff volume need to be recalculated as our initial review suggests, the recycle basins may need to be resized, and/or the design storm basis changed. In addition, settling calculations will need to be modified with a corrected peak flow value to ensure discharges will meet effluent limits. Please submit modified calculations, plans, and/or other information necessary to resolve discrepancies -with the potential runoff volume. Please submit the additional information by June 11, 2008 so we can continue processing your request. If you need more time to submit this information, please let us know. If you have any questions or would like to discuss this matter further, please contact me at (919) 733-5083, extension 529. Sincerely, r Bethany A. Georgoulias Environmental Engineer cc: Washington Regional Office Stormwater Permitting Unit Files Robert S. Bartlett, P.E./ Bartlett Engineering & Surveying, PC/ 1906 Nash Street North/ Wilson, North Carolina 27893-1726 S`4k �mf�5 �oZ BrLETT ENGINEERING & SURVEYING, PC 1906 Nash Street North Wilson, NC 27893-1726 Phone: (252) 399-0704 Fax: (252) 399-0804 jon[Qa bartletteng.com March 3, 2008 Raleigh Regional Office Department of Environment and Natural Resources Stormwater and General Permits Unit 1617 Mail Service Center Raleigh, NC 27699-1617 REFERENCE: S.T. WOOTEN CORPORATION-GOLDSBORO CONCRETE PLANT To Whom It May Concern: Bartlett Engineering and Surveying on behalf of S.T. Wooten Corporation (STW), presents the supplemental information for the Notice of Intent for coverage under North Carolina General Permit 140000. The supplemental information is discussed below. Calculations demonstrating that water discharged from the recycle basin will meet permit limits for total suspended solids and settleable solids are included as Attachment A. Note: the capacity of the plant is approximately 270 cubic yards per day. STW estimates that approximately five gallons of water is used to wash trucks for each cubic yard of concrete produced. Assuming that approximately 30 gallons of water is used for each cubic yard of concrete produced; the wash -water generated dun ig each business day should be reused in the production process. • The recycle basin at the site will measure approximately 113' Qength) x 36' (width) x 4' (depth) with 3.1 sideslopes. The basin will consist of three chambers with the first being concrete (approximately 49' x 16') and the other two chambers earthen with a 10' discharge weir. The hydrograph and pond report generated by Hydroflow Hydrographs (Attachment B) indicates that the total storage capacity of this recycle basin is 16,304 cu.ft with an operating volume of 6,549 cu.ft. at 2' depth. • STW proposes to use a Model 5000-S pH Monitor and Control System at the site. An engineer's certification representing that the system could effectively provide an effluent with a pH in the range of 6-9 (as stipulated in the permit), along with manufacturer's information on the system, is included in Attachment C. Based on our understanding of the requirements for permitting, this information is sufficient to facilitate permitting. We appreciate your assistance with this matter. If you have any questions or need additional information, please contact our office. Thank you. Sincerely, Robert S. Bar, Enclosure ATTACHMENT A CALCULATIONS S.T. WOOTEN-GOLDSBORO CONCRETE PLANT By: Roberts. Bartlett, P.E. RECYCLE WASH -WATER BASIN Bartlett Engineering and Surveying, PC CALCULATE PEAK RUNOFF FOR SITE Wilson, NC 27893 Qp=CIA 252-399-0704 Qp = peak rate of runoff in cubic feet per second (cfs) C= coefficient of runoff &-P - 1=intensity of rainfall in inches per hour yam- a'-DQ A=drainage area in acres �r �7 „ a.� Coefficient of runoff; C = 0.5 _ c.�t (Gv P Rainfall Intensity; I - 9:05 inches/hour ✓ 25 year storm 7 ?-zf Drainage Area; A - 4.17 acres Tc = .6 min Peak Runoff; Op = tQ17.94 cfs X 18- S7 Runoff Volume = _0.148 acre feet (see Hydrograph) 6459 cu ft 7 t ov J_O-L: 48314 gallons y y 182868 liters DETERMINE SEDIMENT BASIN SIZE Sediment Basin Dimensions (See Hydrograph and Pond Sizing Output) Basin Bottom Dimensions Length(ft) 107 Width(ft) 2 5 Depth(ft) 4 Total Volume of basin (cf) 16,304 Side Slope=3:1 Volume at weir elevation (99.0') (cf) 16,498 Average Dimensions of the Surface of the Basin Length(ft) 113 Width(ft) 36 Avg. Surface Area of the Basin w/ Chamber 4198 sq ft r (99.0 countour) Weir Length (ft) 10 ft CALCULATE PROCESS WASTEWATER FLOW AT SITE Average work day = 10 hours Wash water produced = 5 gal/CY Maximum capacity of plant = 270 CY/day Wash water per day = 1350 gallon 1 gallon = 0.133681 cf Wash water per day =I 180.5 cf CALCULATE DEPTH OF FLOW OVER THE DISCHARGE WEIR H=[Q/(3.1 *L)]^0.66667 H=Depth of flow over weir in (ft) Q=flow in cfs L=Length of weir (ft) Normal Operation (no rain) During Rain Event On= 0.005 cfs Hn= 0.003 ft Qp= 17.94 cfs Hp= 0.694 ft . J 0. 7 oil- wtw r i qO.r • +r 0 ro o &5-0,000 CA-0) cl� o, • 1 / cTt,t i•,_ ram..% . 7 Z Sap- -, 7 ,:-- ( 009, 59,� C't. �� (f CALCULATE CRITICAL VELOCITY OF PARTICLES IN POND DURING PEAK FLOW Vc=Qp1A Vc=critical velocity in fUsec Qp=peak Flow A=average surface area of pond Critical Velocity (Vc)= 0.004273224 fUsec Retention time of particle (Rp) during peak flow=Average Pond Length at Surface/Vc= Retention time(Rp) 264433 seconds Critical settling velocity (Vr,*) for particle to settle to weir (rain)=Hp/Rp Critical settling velocity (Vc}) I 2.62604E-05 ftlsec DETERMINE WHICH SOLIDS WILL DISCHARGE OVER WEIR Focus will be on dement particles which are the least likely to settle and therefore the most likely to discharge due to their small size . Calculate particle settling velocity (Vp) and compare it to Vc'. If Vc">Vp, then those solids will discharge over the weir. Formula for calculating particle settling velocity (Vp) Particle settling velocity (fUsec), Vp={2g(p1-p2)r112)/(9u) Stokes Law g=gravity = 32.2 d=diameter of cement particle(ft) _ 1 micron = 3.28084E-06 ft pl=density of cement = 94 Iblcf p2=density of water = 62.4 Iblcf u=viscosity of water = 0.0005981 lb/ft-sec Source: NISTIR 6931 "Analysis of the ASTM Round -Robin Test on Particle Size Distribution of Portland Cement; Phase II t Discharge Diameter size distribution %< diameter (ft) Settling Velocity Critical Settling Over Weir (microns) Vp (ft/sec) Velocity; Vc (ftfsec) (Y/N) 1 4.7 4.7 3.28084E-06 1.01734E-06 2.62604E-05 Y 1.5 2.6 7.3 4.92126E-06 2.28902E-06 2.62604E-05 Y 2 4.6 12.1 6.56168E-06 4.06937E-06 2.62604E-05 Y 3 5.6 17.7 9.84252E-06 9.15607E-06 2.62604E-05 Y 4 4.6 22.3 1.31234E-05 1.62776E-05 2.62604E-05 Y 6 7.6 29.9 0.000019685 3.66241 E-05 2.62604E-05 N 8 6 35.9 2.62467E-05 6.51098E-05 2.62604E-05 N 12 10.5 46.4 3.93701E-05 0.000146497 2.62604E-05 N 16 8.2 54.6 5.24934E-05 0.000260439 2.62604E-05 N 24 13.8 68.4 7.87402E-05 0.000585989 2.62604E-05 N 32 10.3 78.7 0.000104987 0,00104176 2.62604E-05 N 48 12.4 91.1 0.00015748 0.002343945 2.62604E-05 N 64 5.2 96.3 0.000209974 0.00416704 2.62604E-05 N 96 2.8 99.1 0,000314961 0,00937584 2.62604E-05 N 128 0.4 99.5 0.000419948 0.016668161 2.62604E-05 N >128 0.5 100 - 2.62604E-05 N Based on these calculations, particles less than 6 microns will discharge over the weir. CALCULATE TOTAL SUSPENDED SOLIDS CONCENTRATION Assume particles 6 microns and smaller will discharge: Volume of Weighted Subtotal of % Total Diameter size distribution %< Particle Volume Weighted Volume (microns) % (microns) Volume 1 4.7 4.7 0.5230 0.0246 0.0246 0.000% 1.5 2,6 7.3 1,7660 0.0459 0.0705 0.000°% 2 4.8 12.1 4.1870 0.2010 0.2715 0.001 % 3 5.6 17.7 14.1300 0.7913 1.0628 0.003% 4 4.6 22.3 33.4930 1,5407 2,6034 0.006% 6 7.6 29.9 113.0400 8.5910 11.1945 0.028% 8 6 35.9 267.9470 16.0768 27.2713 0.068% 12 10.5 46.4 ' 904.3200 94,9536 122.2249 0.304% 16 8.2 54.6 2143,5730 175.7730 297.9979 0.741% 24 13.8 68.4 7234.5600 998,3693 1296.3672 3.224% 32 10.3 78.7 17148.5870 1766.3045 3062.6716 7.616% 48 12.4 91.1 57876.4800 7176.6835 10239.3551 25.461 % 64 5.2 96.3 137188.6930 7133,8120 17373.1672 43.201 % 96 2.8 99.1 463011.8400 12964.3315 30337.4987 75.438% 128 0.4 99.5 1097509.5470 4390.0382 34727.5369 86.355% >128 0.5 100 1097509.5470 5487.5477 40215.0846 100.000% 40215.0846 Particles 6 microns and smaller make up 29.9% of the total particles but only 0.028% of the total volume. Since the density of all the particles is assumed the same, then particles 6 microns and smaller also represent 0.028% of the mass. Estimated amount of cement washed off each truck Mass of cement washed off trucks 0.5 Ib/CY 135 lb/day Mass of cement to discharge=Mass of cement washed off trucks each day x % of mass= Total Suspended Solids of Discharge (TSS)=Mass of cement (mg)Nolume of Storm Runoff (liters) TSS= 17061 / 182868 Anticipated TSS (mg/1) 0.093 mgA Max. TSS (mg11) 30 mg/i 0.037579272 Ibs/day 17060.98928 mg/day CALCULATE SETTLEABLE SOLIDS DISCHARGE Methodology for settleable solids measures the volume of settleable solids in an Imhoff cone after 60 minutes. An Imhoff cone is approximately 14-inches tall. Results are reported in ml/L. The following table calculates the time for particles to settle 1", 6", and 14". Diameter Settling Velocity 1" Settling 6" Settling 14" Settling (microns) (ftfsec) Time (min) Time (min) Time (min) 1 1.01734E-06 1365.21 8191.28 19113 1.5 2.28902E-06 606.76 3640.57 8494,67 2 4.06937E-06 341.3 2047.82 4778.25 3 9.15607E-06 151.69 910.14 2123.67 4 1.62776E-05 85.33 511.96 1194.56 6 3.66241E-05 37.92 227.54 530.92 From calculations above, particles,6 microns and smaller will take longer than 60 minutes to settle only 6". Anticipated Settleable Solids= 0 ml/I Max. Allowable Settleable Solids 5 ml/L ATTACHMENT B HYDROFLOW HYDROGRAPHS HYDROGRAPH AND POND REPORT Hydrograph Report Hydraflow Hydrographs Extension for AutoCAD® Civil 3D® 2008 by Autodesk, Inc. v6.052 Thursday, Feb 28, 2008 Hyd. No. 2 Goldsboro Recycle Basin Hydrograph type = Rational Peak discharge = 17.94 cfs Storm frequency = 25 yrs Time to peak = 0.10 hrs Time interval = 1. min Hyd. volume = 6,459 cuft Drainage area - 4:170 ac �S Runoff coeff. = 0.5 . Intensity 605 inlhr Tc by User = 6.00 min IDF Curve =-Goldsboro"NC NOAA ATLAS 14.IDF Asc/Rec limb fact = 1/1 Goldsboro Recycle Basin Q (cfs) Hyd: No. 2 -- 25 Year 18.00 15.00 12.00 . M 3.00 Q (cfs) 18.00 15.00 12.00 • It r 3.00 fdTaTIPIIIIIIIIIIIIIIIIII 0 1 2 3 4 5 6 7 8 9 10 11 12 Hyd No. 2 Time (min) Pond Report Hydraflow Hydrographs Extension for AutoCADO Civil 3DO 2008 by Autodesk, Inc. v6.052 Monday, Mar 3, 2008 Pond No. 1 • Basin with Concrete Chamber Pond Data Pond storage is based on user -defined values. Stage 1 Storage Table Stage (ft) Elevation (ft) Contour area (sgft) Incr. Storage (cuft) Total storage (cuff) 0.00 97.00 nla 0 0 2.00 99.00 nla 6,498 6,498 4.00 101.00 n/a 9,806 16,304 Culvert/ Orifice Structures Weir Structures [A] [B] [C] [PrfRsr] [A] [B] [C] [D] Rise (in) = 0.00 0.00 0.00 0.00 Crest Len (ft) = 10,00 0.00 0.00 0.00 Span (in) = 0.00 0.00 0.00 0.00 Crest El. (ft) = 99.00 0.00 0.00 0.00 No. Barrels = 0 0 0 0 Weir Coeff- = 2,60 3.33 3.33 3.33 Invert El. (ft) = 0.00 0.00 0.00 0.00 Weir Type = Broad -- - - Length (ft) = 0.00 0.00 0.00 0.00 Multi -Stage = No No No No Slope (%) = 0.00 0.00 0.00 nla N-Value = .013 ,013 .013 n/a Orifice Coeff. = 0.60 0.60 0.60 0:60 Exfil.(in/hr) = 0.000 (by Wet area) Multi -Stage = nla No No No TW Elev. (ft) = 0,00 Stage (ft) 4.00 3.00 2.00 1.00 0 00 Note: Culvert/Orifice outflows are analyzed under Net (ic) and outlet (oc) control. Weir risers checked for Orifice conditions (ic) and submergence (9). Stage 1 Storage Elev (ft) 101.00 -000 100.00 99.00 98.00 97,00 0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 Storage Storage(cuft)