The URL can be used to link to this page

Home My WebLink AboutNCG140397_COMPLETE FILE - HISTORICAL_20160127STORMWATER DIVISION CODING SHEET RESCISSIONS PERMIT NO. IV-(�jr /e-//' .3,�`� DOC TYPE 0 COMPLETE FILE -HISTORICAL DATE OF RESCISSION YYYYMMDD 1/27/2016 )Elaine F Marshall Secretary Corporations Division North Carolina EPARTVi ENT of THE SECRETARYOFSTATE PO Box 29622 Raleigh, NC 27626-0622 (919)807-2000 Filings For: Blue Ridge Concrete, tnc. Image Date Filed Document Id Event Fiscal Year I Document Type � 11/21/2007 C200731200391 Creation Filing Articles of Incorporation J 3I12I2010 C201007117565 Notice Annual Report ADM Notice ®J 5I17I2010 CA201013700829' Annual Report F— Annual Report J 5/17/2010 C 2010137008301 Annual Report � Annual Report �J 511712010 CA201013700831 Annual Report Annual Report J 5/17/2010 CA201013700836 Annual Report Annual Report J 6/20/2011 CA201122500088 Annual Repart�� Annual Report �J 5/14/2013 2013 534 02817 Suspension Revenue Suspension Account Login Register http:/Mrww.secretary.state.nc.us/SearcWfilingsl8607276 1/1 Blue Ridge Concrete COC No. NCG140397 May 7. 2010 Engineer's Certification COC No. NCG140397 I, (K) �%Jwo tMs a duly registered Professional Engineer in the State of North Carolina, having been authorized to observe ( eriodica-Ilya, weekly, full time) the construction of the project, OOWO_elL , LO ecL\Ier VAke )Ae- .=Y.nr the Permittee hereby state that, to the best Project Name Location of my abilities, due care and diligence was used in the observation of the following installations: Construction of a closed -loop process wastewater recycle system at the Blue Ridge Concrete Ready Mix site. I certify that the construction of the above referenced project was observed to be built within substantial iac�u<r compliance and intent of the a provedl plans and specificatioDs w 0 1� ��`" G Xc'_` � GN1 0+ *\-` fCq-P k `i�� Z i,.�� uJt'r �c+l[^S tl1Uk¢� kktz *.p ' �`tVr. �'-Okct �Sik U..%o ,1.6 *'C30 a-P`A"'n C�vS"irJci—c( wa5P'A.1�_. eV+'NA eu.S e5,�1t Qtxc( `l4rJcit��r i�a ulr�� kak5. wr,.r ko'�' vlr•r.Qrc4. S�r n1�c.t4�c1 45 �ui(-S• �mwi�s -For ��a.u`'r S`if`�Jc`�SJ'r. lo�o.`�abtLs Signature �� _ Registration No. Date Mail this Certification to: •Stormwater Permitting Unit NC Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 4b j 13 /7-01 r'Ye- C.G�! 0kA I we z Car' bLAIt 1 �1na 1 J; c -rel tvzh �. 1 �S. �� lnnl•e.5 , S� w��e� .n.�l ll �� s L- �i ow DV eA/- f 6- i s w; th y►.> o,r.e . r,� f a 1 6 f Zc�it�� 251� kv-p >r��es cYi��,�zl�y Subvv��i , 1" 2 4.,j0 4t DI 11,2L j0C Ui " ?41_C�ej. H Said '' �ia; �(,•Qa/P s ��. n Rece; d Slci I 10 Central Files: AP5 SWP W07110 Permit Number [NCG140397-7 Permit Tracking Slip Program Category NPDES SW Permit Type Ready Mix Concrete Sto rmwate r[Wastewa ter Discharge COC Primary Reviewer Bethany,Georgoulias Coastal SW Rule Permitted Flow Status Project Type In review New Project Version Permit Classification COC Permit Contact Affiliation Facili v Facility Name Major/Minor Region Blue Ridge Concrete Minor Asheville Location Address County 50 Murphy Mill Rd Buncombe Weaverville NC 28787 Facility Contact Affiliation Johnny Maroney PO Box 2594 Weaverville NC 28787 Owner Owner Name Owner Type Blue Ridge Concrete Non -Government Owner Affiliation Johnny Maroney PO Box 2594 Weaverville NC 28787 DateslEvents Scheduled Orig Issue App Received Craft Initiated Issuance Public Notice Issue _ 7 Effective Expiration J 02103/10 5/7/ZDIO S/7 f Znlo� Regulated Activities ReauestedlReceived Events Ready mixed concrete production RC staff report requested 02/05/10 Ready mixed recycle system overflow Additional information requested 03/22/10 Additional information received 04/16/10 Additional information requested 04/19/10 Additional information received 05/04/10 RC staff report received 05/06/10 Outfall 001 Waterbody Name Stream Index Number Current Class Subbasin Flat Creek 6-88 C 04-03-02 AfiNXW AA NCDENR North Carolina Department of Environment and Natural Resources Beverly Eaves Perdue Governor Andrew Bradley Unimin Corporation 258 Elrn Street New Carn.:an, CT 06840 Dear Pernrrttee: Division of Water Quality Coleen H. Sullins Dee Freeman Director Secretary April 21, 2010 Subject: NPDI S Stormwater Permit Coverage Renewal Unimin Corp. -Green MOUntain Plant 92 COC NumberNC—G424N6-?� A/C4 a2,0057 Mitchell County In response to your renewal application for continued coverage under the Stormwater General Permit the Division of Water Quality (DWQ) is forwarding herewith the reissued Certificate of Coverage and stormwater General Permit. This permit is reissued pursuant to the requirements of North Carolina General Statute 143-215.1 and the MemorandUrn of'Agreement between the state of North Carolina and the U.S. Environmental Protection Agency, dated October 15, 2007 (or as subsequently amended.) The following information is inciuded with your pert -nit package: • A new Certificate of Coverage • A copy of the stormwater General Permit • A copy of a Technical BILIlletin for the General Permit • Five copies of the Discharge Monitoring Report (DMR) Form • Five copies of -the Annual Discharge Monitoring Report Form (if applicable) Five copies of the Qualitative Monitoring Report Form The General Permit authorizes discharges of stormwater only, and it specifies your obligations with respect to stornnvatcr discharge controls, management, monitoring, and record keeping. Please review the new permit to familiarize yourself with all the changes in the reissued permit. The significant changes made arc outlined in tile/ Technical 13ulletin, which is attached. r Your coverage under the General Permit is transferable only through the specific action of DWQ. Wetlands and Stormwater Branch 1617 Mail Service Center, Ralegh, North Carolina 27699-1617 Location: 512 N. Salisbury St. Ralegh, North Carolina 27604 One Phone: 919-807-63001 FAX: 91M07-64941 Customer Service: 1-877-623-6748 NOI'thC%lrol Internet: www.navaterquality.org ll'l�� An Equal opportunity 1 Affirmative Action Employer Nlltl l NCDENR North Carolina Department of Environment and Natural Resources Beverly Eaves Perdue Governor Mr. Johnny Maroney Blue Ridge Concrete Post Office. Box 2594 Weaverville, NC 28787 Dear Mr. Maroney: Division of Water Quality Coleen H. Sullins Director May 7, 2010 Subject: General Permit No. NCG140000 Blue Ridge Concrete COC No. NCG140397 Buncombe County Dee Freeman Secretary In accordance with your application for a discharge permit received on February 3, 2010, and additional information with revised plans received in April -May 2010, 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 Agehcy dated May 9, 1994 (or as subsequently amended). Please note that this COC does not allow discharge from the irrigation of raw material stockpiles, which is defined as a wastewater, from this site. This stipulation is a result of information presented in your application and technical review of your request for an authorization to construct a wastewater treatment system. Because drum washout wastewater will be contained and treated within a closed -loop recycle system, designed in accordance with 15A NCAC 2T .1000, the COC authorizes discharges of stormwater only. Please take notice that this certificate of coverage is not transfera'ale 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. Wetlands and Stormwater Branch 1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 Phone: 919-807-63001 FAX'. 919-807-64941 Customer Service: 1-877-623-6748 Internet: www.ncwaterquality.org An Equal Opportunity 1 Affirmative Action Employer One North Carol i rI a ,Alatdtrully r' Blue Ridge Concrete COC No. NCG140397 May 7. 2010 An Authorization to Construct (ATC) treatment facilities has been issued concurrently with this COC. The Asheville Regional Office, telephone number (828) 296-4500, 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. Leakage Test Specifications and Spill Control Plan The recycle system must be tested for integrity. Any exfiltration should not exceed 20 gallons per 24 hours, per 1,000 gallons of tank capacity. Therefore, a 24-hour static test should be conducted showing the tank does not lose more than 20 gallons per 1,000 gallons of capacity in`that period. The facility should also develop and maintain a spill control plan in the event of a wastewater release as part of its Stormwater Pollution Prevention Plan (SPPP). Engineer's Certification 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.27699-1617. During review we noted that the -design plans state, "If fleet size is increased additional washout area for truck washout basin will be added." 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 2N .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, If you have any questions concerning this permit, please contact Bethany Georgoulias at telephone number (919) 807-6372. Sincerely, for Coleen H. Su ins cc: Asheville Regional Office Central Files Stormwater Permitting Unit Files W.S. Anderson, ill, P.E./ WPC, Inc./ 2201 Rowland Ave./ Savannah, GA 31404 enclosure Blue Ridge Concrete COC No. NCG140397 May 7. 20.10 Engineer's Certification (COC No. NCG140397) 1, . , as a duly registered Professional Engineer in the State of North Carolina, having been authorized to observe (periodical)}:, weekly, full time) the construction of the project, Project Name Location Jor 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 closed -loop process wastewater recycle system at the Blue Ridge Concrete Ready Mix 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. NCG140397 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 Managemcnt Commission, and the Federal Water Pollution Control Act, as amended, Johnny Maroney is hereby authorized to construct and operate a closed -loop process wastewater recycle system, and is hereby authorized to discharge stormwater from a facility located at Blue Ridge Concrete 50 Murphey Hill Road _ Weaverville Buncombe County to receiving waters designated as Flat Creek; a class C water in the French Broad River Basin, in accordance with the effluent lirnitations,.monitoring requirements, and other conditions set forth in Parts I, II, III, IV, V, and VI of General Pen -nit No. NCG1.40000 as attached. This certificate of coverage shall become effective May 7, 2010. This Certificate of Coverage shall remriin in effect for the duration of the General Pen -nit, Signed this day May 7, 2010. ®to .fa- Coleen 1-1. Sullins, Director Division of Water Quality By the Authority of the Environmental Management Commission ��, - ".- " % ," � , '. , - % �,' �� , .. � 'j I �',�,."��.,��,,."��,-,�c::�.., .�� , -�:,' ", .!..-' ..""�-,% �,.' - , � - - - " . , � , � , . . . ', '�,,m,. - - � " ", , , � - 'a , -, ---- '%� " ,., " � - . . I-- -, , -,,j , ", , jj-;��,. 17s�-�--�-Z:�7)'��:t��,�,'��.,.�r-�-,Irll",T'-�1--�.�-1, I ,!:*. .----. , . ( -.� , - 1, , - " .. Z. - - .- , � , -, , , . - , , � � - I- � � - - - . . ,,, -, ,", I ,�'. �- 1, . , . ". " '.- ", - - -, `It'�l , . . , , . ��. , .., �IT -, - .. -�:;- � -��;' ... i , I �,.,,. , .1 ), - ", . "pl. --" - ', C- �' a - Y,;:�/,��Y- 1-e,;":v.&., " - - .:,� . Z., � -, � , _- `-��--�- � , . .. - 1, --,,I,-,� 'i-c-, .. ., " !,,:, ,.�>� � ,� . ,'..,�. , � -, . , -, 01: ',�� I - . - %.]It.1 � '. . .. . " " I � , , - 1 , , , . , � ?f, , -� . .� - I "l-% -� ,' , 4 4 , .�." ..�',.7-",; , - J" . - . , � , " :1:11' .I. . - . . . -,T-4 --�-- .. .., , --�c , "I. , , ,:". .,',.' -�i![,. >' , ... - ,��f ., , -,�,-,'-, , -, � "'", , 11 -� '.-,.�.. �t,-,:, , .." - , 1�1."'� k- �-, . ,�,, , , , . I j-. , �. . , , - , .. . . 11�I .Y -. I ,� 1 ., I. ��, t . , , . ,jI, W _,�,, , , I , - � "I, - , .1.,%�."-:� I 11�1'11, . �11, % .. , I '. - -... ." . . , � � . , � H-;,. � ,- % .-. , I - , , � � , . ;. .1 4:� �. 1. �, 11" - '�'I I", - , �) ".. - -, - , " ,� �, , . - - , , v . A � - . ". . -1--. " I . ,, ,-, - ': �., I , , .. - ��, , � I , r, .- �, ..... I ,�-11-,-'-J ,Ul� .... , '��-';� ,-;t .1 " -, ��-. - - --.1. -;*'N Pj� VJ��fi ' w.7� " , , I.. . - , - .'-'I % ""'. ,,, - - . , - - - " -4.1 j ` ,�" . , , ; ; I , .. . -� ,,., i . � , - J46r41Pd8666' ' -, - '� , t'.') I- ,� . .. .... " I , 1, 1, 1- ' ,`.�,� I ,� , ...I,, '-'.-.!Z',",� ,--- . -, . I .jljl�, ,,,%�)%--774�i�!-:- -y".-I".. , - . O�r.",.4 -7 ��, "' f � 11 I f . . , - ;, ---� " -:L - �,� . . '�` I - U -`.-'1,L:-, 1 '�'�' , I",;-- O .". � . I , I ,,, ��,,,, �'. - � . � ,� , �.�; "" "•" - - - --��, * t"', , . .,•. I . I 1 , , - '.. - - ?, - , I % , " j" ,j ,,�, 61.,. -.W. � 'I', " - .111, pj,.�;i.,-,� 011�-, �, f, , , . . 46 � ,'� I �,J,-, � � ,".� r - -,.';, I . . ,.� - .-i ." , - � - ,,E--),j, -L - ), l- i, � -. - " j , .�; J . % ,-, , J . . . 't- �-.I "i k , . ,.,,�-,:.i� '. - ;U�1--P:2',�--,-� ��t� , P. T.k . , I I. - - - , � � .'. ,,, j � V . - .-VIV.. - ., . , W��11 1. I - I .1 t t,!,- .. t - --%� -.,'. I 1, ., ",,�. � � �11 P I n, I' . . , ,-..I . " ��Tt'�:'.--,:,: .,:, I. � , :1 . ��, . I , - 1 - ,!,% -�L� .- - '�i,�<�� .."T -.- 1, � ,.V, I I -- - / I -'�- � , ,�' L,k I %-1 I m:�,�,",'--Q - ,, I � ,-- .,��.%%;; ". ." . Q .., ,�, .. . I - . . , 1 '�,� 1, . . ,". I .,,I f . .. 1� ,..-,-. '.. . . W, " � � , � "" 1-�`. �%',� N ,.I',;..,--,. � ,,,, 5. *. I " - �j 0 1 �, J, . - , " -t; , . ".. - jy,�-.,,,�,%,: �, � .1 , 'I , ., . . - -Ij . - , .. , -, -:1'I... �- -�-�-� , , 'I , - , . , .. I . ":, I � , I ..,�. , . .. . I .. I I % . ,*�, \4 F- I . ,��, , -C , ,.�-,,,&,�-�- -,�,�,, f,� %,?',� . T,-; ,4 , . . �- - . . I . '4�� ,,.�:, . � � , " , I 1. .Q f, :- !� , . - . -, ,1' % 'AO" � 'r. �, I : 4 . . . ,- , . -, . �, 'I . � . ", � , , . . , � , - i , �,,.,,%Y.1,j 'i ; .- , .- ,P0L`-j'--. t�� , - I ,�,,, - �- - .�:Ii';-,�-�:,- - f.p .-E.- -�, - , I b -'� � . .;�� Z' - - �;4-,- ., I ---2 `-� R', ,,, 1 �--,- -'*1/4 f - 'i-- - -, .`.,P.. -11 t, --t 1. -,, - -:M�--.-,',�z� z,:,: -,� � A. . .'o,l ", .Z--.-- -,- - ., ,� -, ..,,;- ., �, ��', , , ,,, .� �,'2� - � 5 . , 1� , �, �, . , ., . .0 -: , , . - . -- ,,.-(- . ., � 1," � - I - - � , -, � . I , -'�--%,. . %` 'e - ��f,= .i*--;, 1, ( I., �,' . I ".1" . , ..." ,1�,',;/,,'. ". , ,�-,:, - , .. - , -�,-��, - j - -- I ., .. .v -.,.�I,1.A'--; O � ak. I-, � ,,, 1"1� �� , -!,� % "--- : t � - p;,;1 , , , , -, , " ,� '. . .. - Q�,. --:�,. I - -i . . .� , � - - . , (:., t; ,'�, Z �--z,-* -.-,=L;r-. "M I- - , - .. ,-... , - " -1 , , , , .. --- �.. --A. r6 - I I - - - -, ,:�7�- 1 11 , , " I f " . , -t� , ,'� '. - 1. '. - ./ - . .. �- �. �, , _,,,--,,,,�'-- -:,ec;�� , .. - � I � - � , . vi" - . � -,� ;.!1%,,�', f�t � . ;. 'r --� - .,. - " I � . ,� " - - .:-�7 , , ,..% .- )1 �-- --��'J-t 1� Z�,Z,, � �, - q: , - �.. ,!I, . . - , , I ,I %,,. , '? - r, - ---, -, , - -Z, -(�'. �. ,� �! . -- . , 'I, - I . . . , -- : , ; L... . -f";- , � , . ;_tpx , .. : � � I k - � - X. �!�..�;-�- f � I.. I " , - .. 11 � --,�--"-. ,,�;! � r. I. C, .'=, -,:�. , -, . - - I -� --,,, -- -- , , " . , ,�." ,.'.�'?-�, -,-- ,-. , - ;�. - -�r. - z'z,- 1, , - - , � I , .�L., , I. --' � - , t , �' 1. . ..? , � ., - 111'i�: -" � - .`§ ,,-'�y,�'.�`-. ., .,� , ,,- - ,.-., 1, - ,;;�� , - 4 -- -- ,,, F:- � �� . .... . :'. - , - - I I � -Z - �: , , , - , Ze --�- , -,t, , " -'. -�' . , " �, - . ...- - I - I " -. ". ,,.,) ! , W, I . - — - I , * - ill .0-� , - , , - - - - ." - t - ' � ' - A!" , , , -%.. - '.." . , , - -.,.,(� .1 . , .:. , , , � :-2" I , , � , 7!.�;7 . ,. - . .. ,� ��, �, " -�` 11 � .. .1i.� S�J�i- C k '. ':�:� �k ". r . . �i. . - psi I� -. -. ---. --.,, .`�'�, I " --�. � .k , . Z? -. . - . -!,�, . .., . , -,,-�,,. `- ---z " t . I I � -%,, .., , .- .-I 14 � . ,k,..% - I 1- . . , .- . T1, .. .- , -1: . , - - " ;I, -I. , . .. - - ? - - -. " , , V - I .... - 115 - , I .. . . -, ". � N , , �� I-'. � - I "I I -�� " ��;;5, 'm -- v - - -,.,% �, - -il, - �. . , , .1 I ,11� , " .- � N .. - 1 ( , , � . �, . � . , � . ,( .I W� 1 .f . i'l I.v " V - , . . . j . .. -1 '. ,,, . jC - 1. . -� ,"I - ". I . � IF& ..�-�'.';',' �♦ ..., � 11. ". . 11 � - . � ." I .. , . -"%7", --,,) - - " - - - ' 'A If, �,-, I ., '! �,, - , �•, .21 , " 15 .. . ,F---,!-,!•�z , ,'�'7 -' " . ;�.,,', - r ,� -'. �m. ." .. , ."v " : . I - 1� ,..� ,�7� �-�!. --.�', , � , ( .., , ..� , - - i ::. I. , I I - . - , I r I" "j,,-' . "' I Il. 141� \'I.,- I � . . .1 :".I � . -� -- . z . ,� :2. , � , . - , - ' i .( /I I T. '. ',,I �$. - - � �� . : - I " . . I . Il, , " I , - � - �,'17.7 ' I j �- , 1-!`,'� -:':� I ' -, �. - - - ..� I i I , , . - .-, - " ---.-'t.. I � 11 11,�� 1� - �v I!, . � I � -,'-- I . 1, . "I I:, ,vz��4.v. , - � , , j - .-,.N ,,,,-.,. I � J, I ,!'- _ - �� -.L�� . . �, "-.",-, k ,-I,,, "1, ,\,� . - � , - 11 . - - - :4 , , � v. . , -;- .r .,; '. . . ' .. - " ., , i - - " - -� -, Q ` -, . .f, ... 'I "I.f' --�-J;' 1 � -"j . %': /k I I - . . - I - I , �- I I I .� - . .�, " , . . . -,.... ��.. 1. . - te��,�� , . , , .. , ,; I,i � I ,:,,4,.,--,,-`,r`,,, .)�,,` , I ., ,I �- - ,e,-Z� �,t .6 -/,�� . " 1. � -1, I — - �, I , - zl�, 11, , I " � - . .1� I - p-�--.. .-i��.M�, 11 � .1"'.4., I ,-,i-. , . .11 1, �j ),I� 1-/ " �, " . -, ., . 11..`,�,.. " , 1'1�' , - - ..:'�, I - I .- - -, I . , � ,,,.,' - -�,- I i I - 1.'�,% " I [ I...., "J1 I I %.. . � �,:., I --,-. --�'-,;? . -�.�A ".; ,::z - I - - I I .11� . 1�1- . I I P , I 1�� . , -, - . I ,!�% :, ' . - --- ., k L`; " .. . . - -), , , " / .. , . � , � -I..tN,� ... .';';I' - , V � . �,•.-I ...�' ' . , - - 'J,,:",��, � ".. -- . - .. . - , - . . . . ,:) , �, I ISM . � f� Ik ,��. I." S� .1 A -v - � , . - % ;, ". " �,_, I, -;�-,,k% ..)) " , "4 •, . ,��;';., i , �j � t :. , - - �z �, I � ") -, .V. " ,�� " - 4- - .�'��, -� , - - P. I I , " ; , . �11 I ') I - q!��,-: � , --- , � ,,,�, -I ..'. �" 7' -. .'! , ,,, , -A'2��,T.r�� 1� -"-. 1, � I �-' t', ,�: � �, t ,�I, . , , -- - ` , - " . - ,:Ril ' r, . . , -" ". -'�,��,, , ,,, � I I �';.,Irlt- .11 I . I I - , , I 3 i .- ,;,,-� - -%, .�� `�-��;. ; .",-";,�( ,f , . _7 - . '. . . - - '. , .� I I U' -1 , I �� , - . �) ,;" �... -'.".,? i -�'�'." I, �-.:-- .! , . A., / , ;,; L .- f _- -�� . _. . i , � , - - . . . A, i - - t i )2 -, - �, �- ,,�2 ,"/i � _ " 1 4-*� , j 1'r � , I ,_ , '; . , . : , ,� ,-� r,.!., -,!: , o, �,�`� , , '��-; , . '. � I ','- j ' ,- - , - P t;' , pd; I k:�i,,` �L��-' .�, ' T .- ,'. I 1 - e " . -, 1� 1� (- - " , . R., ,. X�,, � , , - ,!,.�, - �t �� r � , - . ��., I -.. . I . .. . ,� x'�,-%�.,I"'., - I , (-� I , ., 7.%.:, � ,:1, - .L,!, t L (1 , I. �:,� , � �� "N f .I,',,:-" I .. '.. , , ., , .. ��%�� 1, 1� 1) f., �, ", ".I ' "' ' �' .� ♦.'�' �, I �� " - . 4---i -, � , - %"" , � " -- 1, - , .� ,, , , " , 1,11."'Z , - �,;,� IN 11:1.�, .,f��-,-".r,4-,*�%';,�'.-'.� . � 1��!� * � I . . % 'j, -., �� r- 'I L' i ,,, - - � w . . , "V , " ", , �, I , : ,� ('� ;� - , - " % , � , .- �,"�- - I - , , . - , 1 -�, � .-I , - .. 11 , . 'r � "A � -. . � �- I , �, . I , 11 � ":",.. ,,- I.-,,, 'Al � , . - ., A, j - - ,. r.'.,- ,� , , ;,,, " I '� � ; I I - " - �J � � II " , ?;?.- -,�, '�, -- ,I 'V "I I , , .,,�.,-,Z",". )-I .-.:)I... " t, ,� � �1; 1! f ( -. L ' . �, . f 9. Nl-�. ,;. � - ) ) I � �', -I 71•� , 1'. . ,�, . i I " ), . I '�L '� I � -- / '. I I'- ,'/.• - ' I I � e - i . � . , ,\ -:'-�� - - , -t I I -- . p .- .. . -� ;�� j - ... .. 1, ..�, . . / t I �;e I - ��;-,. -. -,� 4=-,�- , - . ,,, .. � �.•� -!.,,, V,. - �, - :, . , ..),, I ,,,, I r� - . . j '. ., I �11 L--1;11r.�il'j, - , __ L - - . 'f..; , -'71',-, 1 ;. , I ' ,,�'. I", , r'�'.. 11 '. ,--, , . I/ 6 4.1, , -�,-,�,,- ,'�.-:�-- - ,--v�-- , " ,I.-' f C, '-i. - - ; -,., - 17� , L•- _� - .AN - '.I I- . it � �, , - ". , ., , I, -: -.1 ..I� I I . ,L�- I - , 1 4 4 ,4 , � r�. ; ' ' �, , ' ;; - - ,%.:f, _.N II k;l I � '.. 7 - I - - 1, ,.�`-�j..Z-' -- , . ',- . S -��'..- '�, . : A ,-, - ___�. L . rdt'., - 'I I - I ', , _ -_L , '?_��,�-,��_-7 'f 'L;4 "' : 1k,e,P.,k,�i,,, '.,. , � , . - � . , -.;�� I ,✓,-.- �: - -, . . . "' I I I- e , , ..";t J I - % - ' L 4 1 ? ( C,,11 ,, �, - - �� 4-If - . , , . �' ) , , . , ,�..,,.,- ,�, � 1, J-, i 'Y ,- I .1. "; . ,-�� ,?' " ;�- I (I -�--- - . . �-,- t I j I 1�� -- "I -i�, I, .ry., ;, . , , - w�l -, ( - � , � . ,:� - -el t', , k 't� :�-X� - - - - - Z; -, . , .�?,�� . '(.' , � ;�- . " " ' L� -.7 I-.,,-"- ;p �I- , -, -�2 j .1 .,,., I � .. �4, L' , I , � 9,!", _,-- , " ". �- - I -� - -.1. I - . I . ., ,� �",.- . , ", . - - - I �, I , , - � I -, , . . - - , . . % -- - " *, - I I ��i, -V . I 1, , -�� , . - , .� : . � I . - � ., i '. , i. - -,:--;�. tL - - - ,:. '� -;-�,-j - ,11 fp-13. . .j I , �, ",/ �:,,;-�,�,:�: er!,--�a .- -- I I � T,F'.�, ..', � , .. A " �11 .. . , - ir -f - !��;!� , j, �i , " � " X:)" ,,,-,��-, I " , - - li-, -.."j. , .." � ,.,.� %,:_1 , , . . 7-, -�7:- - , ,'�-,- � ,�; .. i . --� ') I , , . I ( 1, . -t --jL - J , I - . 1 ;� I. ';4 � - . , � �. .1 -- - -,� ;L', ', , `� , , , . " '. , ,L L , , ' _ `-��"� - '. ' � ---" '4" I "e., - - - .1 I .1. ., - - �, ':: -- - - --, �� -- - ': .- - pir � , i - - I � O& . � .--: r;r�. .fI- :,� . - - -- - A m �, �; ;!� .�f � , -1 O" - , .". `-, - � , , . 7;%. , '. . I " :N- L - , - . . ,c - r - 'I - " I , , � � - '- '1� " ,-0't`e � " t I e', ", , " ' ,'r �,-j , �, � , , -�,,,��L �� - -A I -, "r - . T -�,�� , - , � . , _ '� ' I J"/'; " -�] - - -, -n:��- - -, �Tif r )":, . , I � . " : - ,� - , : -i�-, ,-,-..-: t-:L. -, . -==�"f:z:�,�, , i;,� I :f: - -� p� . ( , , .\. � A If- I . I fl." , . - -:71-, . . -,�,�` ( - , . 4 4 , " -- - - f .,� . -, ; (� , -'I";-, . , � , I ,.,. " -;�.-.-, C,, % "' ,-'�,,,�-)��, .L -� I . - - -" ; .,� -, , ..,, . � . . �; � , ;71: ,��iil,'i� , ! ,� 'I. O -rt�-Viv h � � I , , , , , / 1. 1. I - �, . e�,,--,7�`,,4 �, Nl��;�], I 11 — - , � Ir .,--� $ :;�Z�-'. .. �, � �7a,� ,- i:, , , . . , -,I m , ", ---,.:; , ) '-� - , ,.,., i 1 . .,;, . . `,': - ,4 - - I -, , - . �, I - � . " I I - " , . I - ,. - ---_,, - . �1. _ ., rf . I . -� ,,, ;-;�� I F. 1��-:,( �-;,.-,,-,. N,-�'-�� ,,,�u,%LL�, '4.Q =e-- ',:..`,% - *, _-=/..-'fTj�27 �.,:�.,,, 1_ , , , -,. .- ,,, - lj'j;�. , ` , - rL . . - -. --. ;�-- -, , . - ,4,Z��.. - � - , ., . .. . , I , .�.. ,; . - � I 'I - I .1 ;;� 1� - - � ,:. , ., . . - .. ,". � , ."-, - I � � - . . , ".,--�-�- I -i --��-.z t -W, , . �1. 4'-,� " ..'.. ,i:--- .. . � - r-'j- � :.1 .,�.- I -. - 1. -� . . - , -,r,/,., I - , - . .. - ., , I .1 , ,% ':�7? - I -�)'�,'�, , " , - , , 6. , - ( i"I'...il ..; -. :;.';", , .�`.f ..� , - - k" . , -, - - - , , , , � , , t . � , / � . ,� " - , ,� . .-�-,.- ... - I I 11 - - - . � ,,I - - e, " - - � , L'� % ... .. .� - - . ,.". � '4 �' .. I :.. . . .-- � .. - Ylik �,,%-�, 2�' 1: I.,., . '. I xk, �f:� :�-"- - , - --Z ., 1, �� .W.�, , ;3 , . I � Y ,'( ..', 4�f. , , � - , - I - O � � . � 't�� ,� , _ , , .!r " I, - ,�� , � "em�,;L -�� , - _,�'. , , , , , L � - � r ' ,L , I. , - - " , , - .. .. I il �,r,,,%&.��,� ;�,�, ". , O f�- ,� ,,� �, 4 I . � , ;,�'. � I - - I) I L L I. �-.\� "'-,�."" '�--: '� I - -A I � Q ,,- ", . I, -_: A ,' . . lq�.'�`-�'. J..," _ . "� , r. ' I I .": . - --. .1-,I4-11'L1-,.,(-�=1;. 11.,� , - " ) . . , , ,, I� 'r �� __. - _, . I � ,.--)�� L ' i ON I, ' ' " ' - -"%11 . I . I , - � , ! , , � ." .' - ' I ..-'-- - , ` , , -. . , - ' � . '? - . - - , , t - -C , � - ,',":��q�/, �� . ;-L , ,I I" , � � - - �,,. , -, � I k1k, '...�,Z�,-- " , , -,:L � , ... I 1) I !" � 11 - � ., , � - . I , 1, ,,�.. s� I .. �, . - . . . � �, ., "", t'. ` .1' j i - -' V""' � ' J" � L Z`:��,�•.', ' ..""' , - - ( .�� I , � . %�,J,. , I � � -, .. .�� . ��V -. �jd - I I f ,�'. .. - " 1T*r - , .. . ; 1 P- �, , ^ ' j , 9 r.� , . -..�-jj� . ' - � I : (,: . , i - i , - .� . - - . , :��, L - I 1 I �. I "I ' ", ,�. - - k . ') 1 - ' -'. ' � I "' .' "!1 , � 1: .' , j f /.I ' ,.�"L� I , . . .j-_,1-' ".7V�;,;. � I ` V .,.- - - -<, f., , " " ,..,. �, - .11 I " " 1. '/". , ."�t-11--Z-t-4� � ,- - �', , . . . J , __-- _f_, - - ,� �. ,,/ " _ �.L . -.1 I . - I:. 11 I . - - , 1, -1,- -��,� - I.sue":.` .N.- I. ,�-, .. -- , p , Nkr-. , "..), . . .� �,-� "�1'1' "I "I" _ _ - , 'L� .;� I , 11.1l . . I " I, I , ��., , , . / , I r - , . - ,( - , 1�. - i �X . - , . �� --", , . . . � L, . . I " - -�7z: , �, F 'E.,�J;,: - - - . - ,�:, _:�, �. :, - . I - . ,�,�l - � �.��, I"T� -, . I -d" ' ' -e�� ,,,,:""4 e ,,k�,:.:;,:.. .'.� �; '.1 -Z" — t. — . _��.. . W �' . 1, .I. -:Pf,�, L , _ , _ , � I., . 1�.,i.. j ". ., , `,,, - .- .k'�T�,,- '. I , - Ikk�, '' - . L �, .,-'3, ,�,,.,�.. !. . -, � , .. - . . - 1 7 z - , f,' ,,,.'_�_' -:L; --,• ,�-j I - - r� f r, " , `�, '��"'jf�-f'-"/�' -��, .. ", � , , , , , i " f [ 1-� � :j i��- .,Ir-- --� -, , k�.- , � , r I I I � ; �- -, ,,�, I ' .�' . . �', . ", '. "% � , L ' I ; ,�-*-, 0 , � :��, , - . ,;, -� i , , , , , , - , r 1, . L" ,�), . : � � . , _ - , -� � .� I .� ; - BlUe Ridge Concret `-'�t�;p�'- - ,i4 %'�?,�� - " .. 1� I ./ , -1�1�,,�, - ? _ .r_ --, - -- .,- -4Ir-', .� � -5 " 13 P.1- -) ---,�' -'. --.7 - , - , " 1111��. , , . - �-Ilu � , I ,b ., � � .1 1. .. . %. � -, . � .'. : ", 11 , , , - ,�i. .--- ` ,f, .;- _-n � ��. , �,,- ---� �1,-----� "' , .��,� '.' .% �� -, . . ---.,., "(, .,�19�,;,t 'O", k I %%N��-O-_- ,•-,ji , �-, , - " -= .. ,-'- � - I � 1. I , - . I . . � ', , ,:� - ... -C;��k--;;��,K. .,�� O . . . , , , � " N -.- . ? .� , - : - - � , - I r .\ .. , , ,,� , . r�N'--71,q "t NP , ��- .'-,'��! . .. 4 � �,...j I. " � , .. :Z.-el."- -,%A'. . ,,,, - � , - , , � -�, � - 4,�:,7 . .. � , , I 1 �� I -, - - - �: - , %t�7;.,,� 5; , � - :� � ...-� L ,*,,'-:r,:"Z1,-�� . I � ,',r ., . , � . ;-,-�:-:Z�.� I 1-77 �. 1, '(,�),�,,Y,N�z � �:,- ! ! , , I - '.,I'- -� - - -.. . - -��' 'S. , , - -I , -;� �� -'I, - '7� - - , ,!:t� , Sk-" �', . � 1,;�,� '�. I I I I �"�, 11 1`t�' . " . , . " ; .,.,, ". - , .." . , / ,� - . � . '111 - - , "' ��Y-,.,-, ,�,J: I . - I -I- '�,: "'.. '�: 7'j ,j,.,�,,`,.' � ) ; "I " ' , ,� ` I .. rz K ,,2 A,;- , P�!- :-, :- ': -��,,� � - �(�,-,. 1 �%, 44�',,'-�p , � �� -�: ,,, , I - I tl - ��,.,, , '. .� 1 ; )-.,%, A' .,1-Y'C -��", �;� 1,7-:.�, � �'. I ','� �,'�;,' �Z :�,-,,,, �%�- ,- :�i,te,- ,�: , � , �. `,� ,,�.11 " I ,.,-- � --,---,,, I , ,( i I t r, ,� �,, -�; �� ,. ." - .: " 't ., 'F,�- - - , - - ... I,,- �--j ,--,�j:-� §-.K';��f�': - - ,'.t I- ...., ., �. � ,��"' r6'� ("' .'; "LL"'; W" -,t,m", , _ , ` , � . - - ,Oik4�-.-.,,�F,,Xt,.--,��=�"', , ,`�1 , . � I �,,' Y-, L , - ,: &, .� -,..,)jL4�,�75,' �1�1'.` ��,-, '- , , - , I � L� .-�I��,',' .� c -,� C,Z� , ,,-, ') 10 ",'. ' 'I - - - ' ' . , , - , - 7� , � " I --,. ,., - - r, , , - y -_� -�: ,; , , - --J�; .1 .1 " tt� _ V. .171�,�4�'�L I - - I - 11 1�`� , , : '-76,qj�� . Y � ., ,,,, - !��-- A 11 I T,"I'l-n- I , - "p p4 " :75�.,r�,I'A,,- " ,,.' ' ;�-- -, L::' I -;,-, " " - %�.F:- -'�,,4L-,� _ .- I U., - -�.-. .� , - I ', . .� � .-Ll I �, �t.l - ;1 - - , e� � -1 , - , - - -') I ' ' "' \"�-,',�� ! -- - �� - � I .- . � _ . - . - , - . I . I , ; � 1,7�;,S;-�.'*... .\ . ; -.",,�, ".,k - . - '� ,Z- . - ". '. . I . �-, , . . _ _ , � �" � ,Z , � - - :-, , � , 've .".1, . .N-J-K -- - I - , - . . -- , � _ �, 'Ll , Lm.. ..; ", , , ";"'J, *,.:!:�'., - -,,4,& '. . � I .� - . ,-�'�% , . N, -'.�'�; � '. , ""': � . �_ , , _ � - . , �,,*:Lz-�- -_� ,� � .. , ,( rr ',C�' , e '. �. , , " - - -�Mr, , i V, , ,:, -� , ... 1, , . , " :�j ..-I;- .,.;" I ,.!� -��- " , . � . .� , � _ I _ -- - , - �- -;* -, � ��, - .; I, , I .- ,� I �Z... L f�- - , 1�,V,,, " ,;� -1i:... - ,-.,., , - ,� ,-"";��.�', ,1;p�" �),-,�-,,�- , , ;�� !'�7 - --i - , - � ,.":L, 11, -i1x.,- , , ,�,- ;�� , ,. ,�j i,-",-" . �� I r 'r- - I . !, :1 �N . - - ; , , ., , \ , _.t;L: _ , . ,�., )� I ... I , -� : :9 . :--� I �, " , ; , �Z- - L',".7�'3', - LL'7�': � , ! r r - , - - . - , - " , ,�--'..�'� - .'. � .� '. -,. •'.,,, .: - ,I !, " I f�%--�..':,:,.!,.,.,� �"O"I, . .k, . -�,,o - --��,;=., �`,'�"-�. 1-j" - ., ': 4 I -�-- - I , l-Ii " I . t .��.- " � - I .. - '. , �.t, ,,,,�!, " -,,�-- - . � f , 7.411��11� .." A�✓-, � I ---X1P;%'1-1 - - - , ;;I Jr , - - . - . " . . I.C..., 1, ! �� , ., I - -, ��" �-, -. 7.; -, " ,,, �j I I I , ,T� N" - le I -1 �' 7 ', .- f .:� I �) - - It V I I" -,'Z� ,`�.,- :j . ., . IV - � - , � I . � .. "��. , - . ;1 I ), ! ,-.'� " ,��. . ., '. . . . - - . - . , , �,, 1 IR41", - . I.- 1, - ,,, .. I., .. �? IV. , , S- I - � 'L.� , -. - ,� - � , , � , 11�. " . - " � I . I .. "' k. ( '- " ' , "'� '�, `, I" .'. �'., L. fj� ... . , I ,:.I (-;,--- - , �L - r-- I - Z .,� ,�� , - �- ' - --k P� � �, - ., -11 " � '�. . " � - r, .1 il � -*,=�v �. � ", �. , .k%,." -,.,,j�. -�_;7.-� , - .1t , , 7, 1,L - - r - r t. I � L ,'. . f % � -� .,?: ��4� , � � , , r I,- 7 ,'I l, - '-��,,'� - _ j. �:� , , P: , -x; . ' - 4 , ;, , , , , ��-`L - � 7-r . f , Mlj,,��;�r - � � 1 Y, � . t'�-,, , I ,:i��-'�:��'�,\,-,'.)t�'Li�2)1�l'.'--, IL .L,;�� - I � k e .; ." -, - ,,�`.'-',- ,6, 1 . I,,'� I j r, 1.�� .' 1 .:-. , . - ;�% ��Mivkl. � 1.1, , -, - - , , , - '. . ", , 4 I.,,! ( ", I .� '. .". , �_��t ,_�:Z,� , ',j L --��-- $��-,4- 'i ,; , , ... .11 7. ." I, �0�, ��n� k�---%-��-e-; �, 1, '---,'-' "'." , ---' , , . �.Jr -- . - I , , N,rn, -- -, 11 , , _ ; - . ".1 . ;J�4, , T , - -:,! .- ' �' '7-7��'.:`�� ` - .-,'� D , - ),,'14�11* � M. 0,%, - ,�` '- I -L- , , -,, .. , , - �, , ) ) , " , -10 - I,)(!".- --",�::-��-!-L �� ' ' 7,� Z�:;�:�-�-�� ,% - 1�� .11 .� ,* , .A - �,, � . - , , 1-�, ," ,' - 'k,L -. .. . . - " �j " " L. �I �� - .� I . .� , , or " =7 ; .-�. q L� - �, ,• - -`� -- - - : S%, �,,: "'I �� IL,1' � ,!f-L!N ":1 � fl�! V` �� 0 , . • ". 1� �� !. "- < � �", . �,,, I 'I j 1�." �0.,'- - . �-.:.r;" L , , - ' _ ' �, �. , , -- - j ) � "' ,z te . � , j � . , ,�, , �; �`, ,.�, " r -1, , , . .. C ,-.'-..L i ,�'-� . , L . Z�? � -- - , , -rt�'� , I . � - - � ,;, � -r.�,U - �� - . - , .,., jt,J -, I (I �- ,/� I. - - , - - . , f, ..' ,,L r ,,, , - e�,( -.!,!�, I,-, I -11 ,�', .�,�J, � , ---- '. I, ,�. , , - I ..i. . cb:. , , , - - - .�! ,. , _7.,, - - , � � . � IT, ,. ,I,r, ' , , I � , �, -..,).�,x,', . . �' -,.:��..�`, �-,- " j , , - - - , r " " A I -�' '.�--'-.', .. --'.."I, 4 t I 'j-... �- -,—17� .�� . 1,1�� " �� I �. I �. 14 � 1 I' ", - .. , -, I , � -1 , , -, ..-'S , . 2"'... �1� 1.1 I " .1, ,.,, -� �-�;, 4 �.. -,��.,- " 'r � - ' '%', ' , "- * , I ,� � , - 5 -- ` - .I " I �� I 111"• ".11 .1 " ., .." �,�., '.-4- , - I ..; �, I- 1...,.',�. "I- 1:, �.-; I " . , - - . I ,,� - V t -, N;� -L't iZ�. - �- -- , 1---( - ." ,1�,t""Zz.-,-,&',�'i-^, - .. - - -. ...:"- .. �*Af- - w, ��; ";�Y " I , - .. - , .�� ','Z.A,',- - '�. '. ,.- , I _ . , I , .-��. I ;,.f-.�-. .,.7�,,�, (,f-'e�" ,I`,j`%'I't-1', , ;� , ,� -, 'r - .� z .1 - v, - - I . Y �,, 'T .�,, , . , " � , '-;'- .W4-;,�7, - , �-.;�;�--4t'W-, We\ - -.�, � ,.-- - - �', I " ,,� , " r:��,,�-��,,�< ' - �: ) ,� , A , - I �, - ' (' ' ' f � " .1 _� , � _,:_'.' �\�,rr _.L,L "".ttff - ' '- , , )' ' A�Zjj X,QI& f � "L, .., k `,., X", - - , v -,� I , , .. I , � V. . -: v� ( % I,,) 1, �,, �.A � . r,_ ��,�:-, - . V ,�, - " - ". . - I— j. .r- , -,...;. �� " - T. �--.-,O_*,Z*' ", - - , " - - U- I ;, ';.�il I- � � I ""�j - ,.(�' j , )k 1�� - ,�-,% 4 - , --�� _ . P,�_ _ , f� --, - � - � - ,,� ' , r- -- - _�.j�:J&�p " "z � - , "; . 1. L 1 � :� ." � .111, ,.�:"%� IJ �- - , , ='. " . , , . ' -,--' ", - � \Z .- ,,, , �-. . ��.� . , . '�r , ,� � - , ,\ �,-. .'A - - (. - I -.11- 110- - e"A I - I , -1, r� - - , " , � - , ;� , , - Z, ;,.� '�,I . " - �,- 1;r . - �:-,kV �:-Yj. F!�,' ,:�'. �. , , , ` .r ,�! -.,., L.4 , , .,n � .1.I, �', , ,.A- �, ,;) , 0 1 ,!" .� ,,,�-i��.:7� !FV�4;!��;� , � ,! , - .� -.',:��,-�,,, � -, - , - I - ,Y.,;7L;-�E�, r -�, '! . -1 -�, -, � - �� ", , - ,� , ;�. jy� - . �). � , � - . "i ,��, -I- �4�'1-�'-�,.�: � � " , � , ), E��,. ,f%t�'I%K; -,1- " ,�� , . " , , � Y' ` ) I J�,' f 4. " � - - , -;;-,�. v ..' , I " " -,,- --J t�� - � N" "" ",:": "� �' ` - .. , , ,�� I 1, . . � �. ., . ,��4� - , " , " ) � . " pqJ.".'-, r ,�,� � - . -� �. � , "T - - - ,,- � .,.Z� . -;� ,:��-;,- ; -,, " ' X" ' ": I . I . _ ,r' ..' 'Z -L":t� � ".. , �!--f-f "", " ��tl 11 . 1�, I - 1-; �,:-�;�t� - . ., �� ,,-Nt��,,l I -- . % ;%I ... .. , , I - , - ,I - ,,IL. - 11 .( . , , �% ., . , - � -, _,L"_l , 7z�t, . " . ---) 11 , U - 4�t I -, - 1'. I . ,;-111. I � �, . :!, - � -9 - 'A I" , ;".'�` ,.- �.� ,,,,�r,� ,�,,,. �', r. '. " '. . , �i �� 1 �i2 ,��,��_,f .. � _ , _,.", '! � . _ _* _.;,,. ,/ " __� '. _ 4 ' '.,)*-, . 1I.J�:-.-I: I ' ' ,.Y-�`, ,::Q&., I., . � . , ., 7�, " . � , " J?N3 I " I , , 'N - ,,��7;;��`�'-'-;.,�, - -� f1i7( �7" " ,�, -? .: -,�. ,Y OT , I , 1, ,,, Z� - %,� C. -I , , ,� Z .� - - ,--,;, � - � !-" - - I I �' , I � -1. -� " -:��,�7. .�. ,� --, 1,� , , .,a.m. �.. I -,N..- , - r") , " " .. .. - .. -P,,'A� �,.! '; , ';- -, , i ""', . 1.,,,�-�,- .':,,� ,��, .(..� It, � " �',.�.'�,,l -P ,"K , ..---� ,`,Y� , ,--,�,�� .""', - - , - '. t� "-,��,**, . . , I % " I, i;' c:,, w!- T,-��., - ..=-,-: I - .1 - .. `N� I .- ,r ,,. I" y �'f" ,%-7-�-�� ' "�', "��'r ( . -�. :�,! - ' I, VF" . �'r L, . . . - I ,�,"�, , " "�,� . -;Z'rt ' I ". . ,,�� . . I III.-, . I., Y�-11. " ,6 - . . - -! , � �� . � , I t�,*:. 1, _- ._:!L , -..j"�,-jj.,,-"r . ��-, . f ,-.-�, -- sr, .,.,.- - - I .;, - " , j,", .,.j _ - ,Z,Z , b; �..)� �� ,'__ . , . k -I', - ... L,:-,. '-,, '� - 4 1 J�,,,, . , - - 11 .,� ;Z��z - . . , . %I. I " I 11 . - ,.�, --, v - " , , !�_;, �"O�'_- ' -�. I � I- .. ., , , w� - .- , -�i - =,,. ", , - - ". .. � . , , -�.,�::, ��Z��,n".-:i�."�. , " .i!ldd, kH(� , (; ., � 'A 9.%,' �. -, ,4--" . , ?, , f,k. I-- - % �..'.. ,I- -t �'. . � - -.11 .. � I" - - � '.'". , �0 - - - - � .".,. , I I - - -� , �, _'j., � . - - I I � :."; , �- ,-,�,, , . �, 'L, ,� , �.t',� L I - I . I , . , , - �Z� -0), I - . ��_ "r , '. ,�% - ,- ,q - .. Z." .�z F-.-�,l . O �,, � a �i,i) , , . 'J'12% � I " I f 1 '44 i� P. � , , It. � , , :� . .1 " 11 � t, C-,��---,, -- - � - ��=�-,�� I , . - � & , %""'.., .'L-- 11 .. , I I . 4, ;' I - 11 % - . . ','� ' ., 11� I .'�- ,�--;,�X4'.LW 7---11. � M. I ,�., . e4 �? 1; �;-'! . t "IN" I ;!IF 1. 601 - �, - . �' - -- - � e �. ... _ , , : -, . . ) Y�!X` �, I I ..,. ` ' --',I - ', , . , 'j% '-�--�` , ,-\% 7:; �A ,,�-::Z-:�p � - - L, '" N 1. . � L - : �, - Z - " ,---.-. I ��, , .�.,�, Pr"t 4 �f " fz ,'. f�- ' -- "' ' -, � . : �, _ . 'L '.�" L�'..�- � V .., - . '�'L - I' , , , -- - --�� - �`-, � 7t�t, �.M I - .1 �.� . -,/, 11,�� . � 1�� I'll Iti 11'.1 - - I. - ..,. -- -- . .. - A � . J�- ..;: - .q� . I-1- , , �, , . . _,�� _ _ . ._, �(!,�, , � " ,� .. , i :. , , ,:-�� ,-- �----V.� ," , " I I _ _ r. . - ,,, I , 1. , I •I , m,- * , '-. . � '�' . �r I I',, _ � _ , , � , . , - ICI ') ", ' r,", - " -. ' , ,,�,.* �Nk,j w _ . . " ' - : , -L�r�� .., .., .11,16 . . I - , -T , , , , , - ... -�� ". -1 �� I - ',�L, C �r, . �;- , , .0, a � �.,� - � - , " - :`%7",;" , , - � , " , , . . 1. '. I IL, , -;7 - .. , - "r I. _ '...,", . , I ,�. - __ � .. .� - ,,�7-1, , --�,�, � 'k " . � _-f' . _ . _ - , 4�- - �� ,-; I , . ., , � , .� - , •,-, , "' j . .; ( . , , � 1.,j a t . � r', t. 1, " ,., - � . 1� I I , , I 1 �. .� . : . , _ .� �'"---,,;,-�'.,`;.-'-�-, �.,c:,.',-� 'I, i I rll.,� , , L 7 - - - . .�, j,, :,,' --!! t�' , .N,y :�.L" _ , , . -, �, - - --j ,�',, i 7 'n, I . .. - :�- .L . .,Z�. ;--. ----. .--%��.- ., -- ,,2*, .. I 11 ..�"] 1'�`��V " , , . - , .�� -� . � - , . ... � � . . V r� . a4 I I - - 1— .." 6•� 04""', -, - . - ., 1, I - , - - . --q - ,. .*:-��4-7410- .�� '�,��4 . If �,i�, � , , I - , , . Z-f, ;�. , '. I ...'� - -�,,, .,: - � I. . �, '! . , , , .- . ..,.-. , !. . ,* .) " 'rl '-A -", " P.� � - ,qy'.- . N".'. I ,:, I . �/" ;, " . ;Z�,� - zi-,.� �.%, ,,,, I - " - I .:, � , - ), , , I, . -�-- ,- - r� , ;, . " - I , , �, .. �) r '? --,' % _ L -',,I.re-' — �� " �-;p ,-:�. g , ., "k ,,, V�`v ,�- C-t7-' '-. f.'�' *'I' LL' ' U "', . '4i"", . 1.1s _ , . . . . ., " �-:-.-;�, . - 1, . .,:,. I , ,�(.,k �� `�.%Vl , _ - - ,.,� - - -�, .;., 6", , - - , , .`, � �, I , I ... I ��, "'�'" _ ,� - I (,?.,�F -: . , - I - . .1 , , - - - _ I - ,��; j , 1, �L'..:__- ,��"e*, % -. -1 )*� - VI - � .- ,A * ...'�.ENOL.,,, ..'�.;--,.,,,,-,4-,,..,,.,-.,Le.,�,r,l,� 1 _ .. - , . � ., � 1". — � ., �I ,� .. %., 4 . , , . . , , I k ---' - - A � ;I'. . I v i., - __ . _�. " " " .I'). , ,�,� "PI-1 ., . � ,;,.I . -.;.,4... . - - y � .. 1. . - . . -- , , . �, . , . � ., .� C N , I , -1 " r , - I - - I . ! I - , - , . ! . .. .." " I , , -1-11, " 7 - I I . - — - -, �--, .1, , ( ,I '41 '. . , I , I . � . . - -;:, � . . - -, - , j," ': I , . , , - �, 1',,�, j � , !. , ,� , , I , . ,,, 4 � " F .Z ':;�` I .. �.-",) %, . ) " ,.---!71!" i1i. / r (;. ." -.,�,..,,-,, �- - . ".., -OrA . - ,� .. - I -.; :��-:�-�I,� .-1.10 I , . - .1 - , '.. -.�Y, I ti - , I. . -� . " --,, I L .. ., 1: I . �-�, . � , k-111 . '. ! I � �, " " i T ]ji-,17.� �'.! L - - . , � , - -,;..,- - - I - . , , . .. - , , ,)'I , � 'L ,�. , . - , ;, . . - 4 L " ' ' :j. � � . .�. , . � , , f, ` , CC: -,4; f . ;�- � -& Ip� I I .Ili � .., i 11�1 ;1 . ,�� '.. " - . � � .1 � I �::-- ". "; -. , M•` H ;1 I .- , -. -:,-. �:; -�o ;-��, " , `� '-,', 1.4 - - e-, .-I, I I � , ." , � , - , . ,;I , � , '-.V -P -,- -,� , -� , ! -, -, " I I- - �Iz . � , .. � ., -- , . . . - .. - " . -1 I - 1 ,-. . ; ,� - . . . - -, j I , , , . , , . �� 4 . L . 11 L� 7 � - - . - �"- = . - 06 O kf, ; :. I .' - 1� ;� ", , I -. - I 'Jr, � -•I cv 'N - 1� .-N 'L. 'A I.—- - I I , �1 -'�'- ',� � ;-, ( ", I - . , �:.�, . -- ,�-,, ,�,:�;' .-,,� N,* ." � 'O .�, �p .., -;, - ' -- 6401 .--, I - -� I . , � - . , ,'-� I , ., � . , - — ";� , F ,� t - , I . . , I i I 6",q P-4 f/v A- --'( " \ � - .-. '. --- . -., - � , -w � ; , . � , , 4 �;,- ,- � ; � , 11�, 11 W-1, , � , . , :i��I� � � . � � 1 ,; .. . �, . ) :�. �. I , Z� - ' 'L, , - ,,,��f L . ..( I . �' -.,:.. ! ,,, , .4� --,., ,,� .1 �, ,� I , ". , .1, 0 1. , , , � ' " , ' r' - - - I %. � �--,-`�r- -;:ZA�'Ni�`-. '-., t ii� F', � - . ( ,�-. � 2 , Y , ��, , -% , 11 jU';,;. , ", - - -,-- � . " -Nk"i�` �� 1i ,,,� - ", --, '. �` I. . " . t! . ;,Oil- , ., ( % _ , J. - - , - -1 - --- - � .- -1 I " , r, , , . - . . I . ", � I . ri " _-: 1 1 � , -"_r ,��jK�: - �'�, " '. .-5: .; 4,�" - �, �, - -, �*--�, -z'- ---- , . . � � - . - ' '7�- .. " - .�, . - . - I - 'r. - z - I ; - I "" �L " 1 _ , L". , . $ , . ;�. " " - ,-�L�, (" t,;Ijz�sp , - - - I I 11 ... -�6, ".', . I I- --� �-1-�.- -,:. - , - - _ ., 1. ,�-. .�., j.,.", I . , - z;'-p p r--,Iz - '-'- .� ", , - . I , - I ,,- . 1� 6 , . ;,,�;:y . � . . , . I I - - % "' , �• . I !,-,! , I 'U, ., - -, � ,-� - , t1.3 :0 , - P. - ; N � � �;,-.`,� , .. ;� � �. � � I - I . - � % ," � 'Y '�. " . ".. , , , , , - , - , . - .. . , - "? " ,� ,A . , i� .' Z.-� - , , - - ,7 , -_- --:4,.,�.. 1'1q.� , .I(' � - .,t��,2� .,a , . 1) . I . . � - �, � , -1 . le .r, � (I, ., �" - - . ,,,-' I , , . , , ". I . - � If, .1 ...�-7 % , - �--L�- . . L, I. - ' %�01 ', � - - ",,_,,:,�,.�?,. . .'.. .- '. . .� ,, I - " I - � .� - , . - 1, � . f �,.�L, _ , , .'J; . t �j , ,-,-,� /. �� 0 -'� "'11 , " - ,� � " ,*J14 :, , -; I �$, _ _ --;��,ri - - �� '-� , ; .� -�'. "� Tr, ,,,,, A f"-i� -�:;��-- - 11 . . . ) - , . ;-,, .._*sly�, 4�' -1. . , � . . . �: Zr , . ", I - - - 1, � -��.n 1 V�, - ; - . - - , - .1 -�`�i",�- - . , - - - , ,,,, " -.- . ;�., , ;., -�-�y- . , -., '4", ;�,A,,,��-,-.-'�Z-�z !�',.4 � .�L I , ', � . . �, � �_f ,I SL%�N�L,��. �'I,_ I - I � �Nf - - � .. - -.I, --- .. ., -. , I . . - - � �:" I -- =�- ��,.';Il .�, - , , . , . - -t , � " -�; � ,.?I - .1 - - �- _:;:,ill -,�,-,�-, �.%,,.:?, , -l", , N. vz , Ir - Def-*,�,--- L " , �j -,� "-- .L" L;' - ,�L.-�,� ., .77 ., -?! . , "" , '. , r j . , ;W�% T,.' �`;�- .. ,---- -- Z I --, , ,.'��,,4��-6�.;":�-,-'-i-:�=f��"- , '. ; ;-,' (-� r- � -1 . �%' - , , P""";.-U,t:�f7�-', . - -, � t .%p ,,, �! 4 -p', -- - ,kS, f(I � -:',-. �-Z�-,:;�'��";�7,E;.� , ! . , , �;.� . ,' %�� d , - .. , 'il I � . ." - ij ." , I, -,. - 1� -, �;,. , . , .• I- - . L .. �;" - , , I- I I x . . , -3�, . ),... - - . . i .. ,.�' , - �,j, t-� .-4,.-,; r > - , , , , , - - - - I I 11 � - , , L , j V 11 - , ,I FZN k7 -A I ' F . � -1- .. .I,-,_- --. " , ,N-, * , --��. -.\� ��I'k,,;V.',v.t��-,I� '.' - y � ' -;7FZE'�,�� - . ,;--,�':;�- - - - 1. -e , . � -- - - it�l - - 'N-1 ; Z,e •- � " . ., . ` ; .; .A ,4 :, � .�'�� ' Lj .; , llir Pl,., - . . ., - , 9 ., - , '. . . - 4, - ��-=�-",:*;-"�,;;;-,a - - - � . " ;�' - -' -A -,;�.�,�;:� " - - - --�_; . : . . . , ..�6�-.&�,-`- ro, , :�-- ;��i4� --- _', - '. . _ . U. iii , � , JJL - ;V;fl;' , -4kf�jl " ,;e! - I .., I ;. - ! , I-i., - . I , I I - , - . . �, " . �4 - - 7-.,,,.;�R�'. ; f,- � '7 7, ---,�,'� r 1. I. , I � �. ". t . e I Z. ;. , . �1 - ,'.*'.- .*, . fu�� - I � :�� ti �,. , � K�. "V- , � - � Z - - - ,'Z- � . - , -� -� ---t�� , -,,-.:�;�:�:�-.-- Z" I �17.-,F,�.�--,% - -- . - . �.� .�- '. - t- � - '� I .- - ,� .�-7�- "k-e,-,� -=N 311.1 ., ;�;-. ., 4 - _ 'N- - -, *�� , - ---�;.7- - �,., � , I ' " ., I., r - - - �� - --; � ,(i •�-1-1. ",� 'N -- -. ' �!�14, ;�"i"Ilvi- �� , , 4 - .. � I tv . ,�, . I . I I . ,� - ',S �,-� - - -1 - - -- j ! ;q,7-.:,;v, i:�, .�� , , I N11 lv4fli 1. � , ,4 * � I I, , - , , - 'Y - , I�t - ! -;x � .I- _ - � . � q I . ,, U.�B ? '?,, *, ,:�� , - , * , 4-�' -, , * �� , ,.' � v �� -�,N _-_ � , -i`�� - ,:�- _ , - - ,"�� , --.':=L�'Z-_ -,��,�;, -,�.` � : - -��'� z . z - — V . , _ - -� �0�, .-- -'-z�'---,t� P) -,.e 7.�----�*�-,,-;- - . L. ' -M.,.-- ��. .� ( I � ��t - . - -.' " . � - I,- " - , , r I- I 'K B I � -- ------ --- " , 1-It-.91L = � -:,� -�v- -1-1 :P�� W*,� A ,-, ,�,--nAx, < � " - I I . I ,,-.---S - - � -.�,:�� ,�� 1--Z,C=-�'-------.i� - . . "." -ilh,��, -, - - -, - \I7 `," " ` -k - - . - 7,-- , . I%---- -!- I � -, - `� - , - �V -,,;', , * - - i j ,� .7, " I . -- !- -.,!I, L - , . k - '? ,�--- �. p , 1545'Tl- ��5� , . ; i . I• I , -� ( - , - .-Jr'- - ..! I-- .. . Y % ,z - .i Y , " �-, . -�-, i�..!,-` -jT�.�h%��22E,.�',� _, ]� ,� 1. 1 2i ,1 .. . . ., _%�=== _ , � _ � .� -24Y 1 1 "I%--' - . . - - !;��, ) , I ,A - X- � . -'!; : - - Ll- - .., - - . �, , .., .,� � , I " `-,-,!,, , � :� . I I �- - , - ,� I . ' -,-� ��,.,.-, � -�.�� - " " T ') " . ! , � . - �� . - - - . , I " ' � �' , . .,� .- - - . I . : �.- ,�'! r . f � t$�'.. , ,� , ..- -. ,- - 11% 1 Q NCG140397 1/ _VV -�A* I , �N- N- -- F 771r - S A10P ScOle 1 .-24, 000 . -.--- . I , Blue Ridge Concrete Weaverville Facility Latitude: 350 43' 55" N Longitude: 82'0 33' 12" VV Receiving Stream: Flat Creek Stream Class: C SLib-Basin: 04-03-02 (French Broad River Basin) - &4M -0 0 � mQft vii Iq A m ,x 11 I I - - - I Facility Location NCG140397 April 15, 2010 B. Georgoulias Blue Ridge Concrete rev. 5/6/10 Summary This facility originally submitted a Notice of Intent to be covered under General Permit NCG140000 (Ready -mixed Concrete) a few years ago (N01 No. NCG140376); however, the package was eventually returned (Return No. 1172) in January 2008 when zoning challenges brought the project to a salt. Based on an NC Court of Appeals decision in April 2009, the property was found to be consistent witr the Buncombe County Zoning Ordiance (see Dec 2009 letter in re -submittal for this permit). The stormwater discharge drains to Flat Creek (Class C), in the French Broad River Basin. All wastewater will be recycled in a closed -loop recycle system (no discharge). This facility is locai::d in Buncombe County, handled by the Asheville Regional Office. Application review a) The permit application has been signed and sufficiently completed. Yes. b) The SIC code accurately describes this facility's activities and is covered by this general permit. Yes, SIC 3273 (Ready -mixed Concrete). This facility will be a concrete batch plant, an activity similar enough to be included under this general permit. c) Does the facility propose anew or expanding wastewater discharge to ORW waters (not allowed), or waters upstream of ORW (special limits may apply)? No. d) DEW or Shellfish Sanitation Approval Required? N/A e) Does this facility have other permits? Yes. Buncombe County issued post -construction stormwater permit S-2008-035 (Buncombe is a delegated authority for Weaverville). f) Hazardous Waste Activities? No. g) DLR Mining Permit status: N/A h) Regional Office input requested: 2/8/2010 (ARO contact S. Wilson). RO Approval received: 5/6/2010. Also, ARO noted treatment systems would not be in the 100-year flood plain. i) Is an ATC Required (NCG02 or NCG14)? Yes. After design modifications in April 2010, this system will likely meet most or all criteria of the 2T Rules for a deemed permitted system. See ATC review section. j) Erosion/Sedimentation Plan Approval for NCG14 or NCG02 ATC? Yes —documentation included in application. k) Application approved? Yes. 1) In Mecklenburg or Wake County (If so, copy final COC there)? No. NCG140397 April 15, 2010 S. Georgoulias m] Special Notes: None Phone logs Spoke with Bill Anderson, WPC Engineering (912.629.4000) on several occasions, including 4/9, 4/16, and 4/21/10. ATC Review Originally proposed an earthen (unlined) washout pit that was large enough to be considered a "non - discharging system"; however, did not meet any design criteria for such a system. 'After discussions with the Asheville Regional office (who also visited the site in March 2010) and consulting the Aquifer Protection Section, the owner agreed to modify the design to a concrete basin that essentially satisfied deemed -permitted status. See 15A NCAC 2T Rules. 15A NCAC 02T .1003 PERMITTING BY REGULATION (a) The following systems are deemed permitted pursuant to Rule .0113 of this Subchapter provided the system meets the criteria in Rule .0113 of this Subchapter and all criteria required for`the specific system in this Rule: (1) Return of wastewater contained and under roof within an industrial or commercial process where there is no anticipated release of wastewater provided the facility develops and maintains a spill control plan in the event of a release and no earthen basins 'are used. (2) Recycling of rinse water at concrete mixing facilities for concrete mix removal from equipment provided the wastewater is contained within concrete structures, there is sufficient storage capacity to contain the runoff from a 24-hour, 25-year storm event plus one foot freeboard and the facility develops and maintains.a spill control plan in the event of a wastewater release. The facility must notify the appropriate Division regional office in writing noting the owner,- location, and that the design complies with the above criteria. 15A NCAC 02T .1005 DESIGN CRITERIA (a) Design criteria related to closed -loop recycle systems in general. (1) There shall be no public access to the wastewater treatment equipment, wastewater storage structures or to the wastewater within a closed -loop recycle facility. (2) Where potable water is used to supplement a closed -loop recycle water system, there shall be an air gap separation between the potable water and closed -loop recycle water systems. (b) Design criteria related to treatment and storage units utilized in closed -loop recycle systems. K NCG140397 April 15, 2010 S. Georgoulias (1) The facility shall have the ability to stop production of effluent, / return the effluent back to the treatment facility, store the effluent, or discharge the effluent to another permitted wastewater treatment facility when recycling cannot be conducted. (2) Essential treatment units shall be provided in duplicate where proper operation of the treatment unit is essential to the operation of the closed -loop recycle system and the operation cannot safely or efficiently be immediately stopped or altered to operate without the closed -loop recycle system. (3) An autor:i�tically activated standby power source, system shutdown, or other means shall be employed to prevent improperly treated wastewater from entering a treated waste water storage structure or from being recy,.:ied where loss of power would create an unsafe condition. „ (4) Where they are suitable for reuse, residues recovered during the treatment process may be recycled through the processes that generated the wastewater rather than disposed of as a waste. (5) A water tight seal on all treatment/storage units or a minimum of two feet protection from the 100-year flood shall be provided. (6) Storage ur.its in a closed -loop recycle system shall be designed to contain the accumulation of water from a 25-year, 24-hour storm event with 1 foot freeboard, unless the system is protected from rainfall and runoff. (7) The bottoms of earthen impoundments, trenches or other similar excavations shall be at least four feet above the bedrock surface, except that the bottom of excavations which are less than four feet above bedrock shall have a liner with a-hydraulic.conductivity no greater than 1 x 10-7 centimeters per second. Liner thickness shall be that thickness necessary to achieve a leakage rate consistent with the sensitivity aL classified groundwaters. Liner requirements may be reduced if it can be demonstrated by predictive calculations or modeling meth(,ds acceptable to the Director that construction and use of these treatment and disposal units will not result in contravention of surface water or groundwater standards. (8) Treatment works and disposal systems utilizing earthen basins, lagoons, ponds or trenches, excluding holding ponds containing non- industrial treated effluent prior to spray irrigation, for treatment, storage or disposal shall. have either a liner of natural material at Least one foot in thickness and having a hydraulic conductivity of no greater than 1 x 10-6 centimeters per second when compacted, or a synthetic liner of sufficient thickness to exhibit structural integrity and an effective hydraulic conductivity no greater than that of the natural material liner. Re -submitted Design Review (submitted April 16, 2010): • Basin scaled down after reconvening with owner on size and cost. Fewer trucks and less water used for washout (5 per day at 75 gallons per washout). ■ Now proposing a concrete structure (ramp and holding basin) set partially below grade (with 6" above grade / 3-4" berm "speedbump" that trucks can back over at entrance of ramp). This should meet the hydraulic conductivity requirements in 2T .1005 for these systems. 14.. NCG 140397 April 15, 2010 B. Georgoulias ■ Water balance demonstrates sufficient capacity for more than one operating day, as well as 25- year, 24 hour storm and ability to remove any accumulation to a water batch tank for use in the concrete manufacture (e.g., successive large rain events that would jeopardize freeboard). Based on assumptions of number of trucks and amount used per washout. ■ Floatation calculations? Would not be required for deemed permitted system, but they are eviewed by the Land Application Unit (LAU) in APS for other recycle systems. SPU has not ,required these in the past fogy smaller recycle systems, but will consider this design aspect in future reviews. Will advise engineer to check these. ■ Setbacks? Should be a 50' setback from the property line. The scale on sheet 2 of the drawings is not correct, so unable to verify setback. Plans need revision. Based on 25' tree buffer noted elsewhere, the distance looks okay, but will have engineer resubmit drawings with corrected scale for approval. ■ Leak test specifications? Based on advice for the LAU (Nathaniel Thornburg, 4/12/10), permittee should be advised to conduct a 24-hour static test showing the structure does not exceed the 20 gallons per 1,000 gallons of capacity over a 24-hour period. Again, SPU has not required these in the past for smaller recycle systems, but will consider this design aspect in future reviews. ■ Protections from 100-year flood? ARO confirmed this site was not in the floodplain. Residuals management? Narrative indicates that the washout material will be excavated and disposed of properly on a weekly basis. No additional details. Add Info. Review (received May 4, 2010): ■ Confirmed setback of greater than 50 feet. The scale on the drawings was corrected, but a standard scale was not used. (Would normally require standard scale, but the reviewer let it go after all other issues were addressed.) ■ Cover letter will advise of leak testing specifications; engineer is aware of flotation calculations. ■ Residuals in basin will be stockpiled temporarily and remain covered until disposed of properly off -site (see April 30, 2010 submittal letter). ■ Okay to issue COC / ATC. E Georgoulias, Bethany From: Wilson, Susan A Sent: Thursday, May 06, 2010 1:29 PM To: Georgoulias, Bethany Subject: RE: Blue Ridge Concrete Sounds like a good plan to me Bethany! Thanks! Susan A. Wilson - Susan.A.Wilson@ncdenr.gov North Carolina Dept. of Environment and Natural Resources Asheville Regional Office Division of Water Quality - Surface Water Protection 2090 U.S. 70 Highway Swannanoa, NC 28778 Tel: 828-296-4500 Fax: 828-299-7043 Notice: E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and therefore may be disclosed to third parties. From: Georgoulias, Bethany Sent: Thursday, May 06, 2010 9:44 AM To: Wilson, Susan A Subject: Blue Ridge Concrete Susan, I finally got all the final plans in from the engineer for Blue Ridge Concrete. After discussing with the owner and agreeing on a concrete recycle basin, they re -sized based on revised truck washout assumptions (and fixed some other things I'd asked about); the drawings came in this week. I'll forward a copy to your office for reference, but at this point, I'm ready to issue the COC if the ARO is okay with it. The system should essentially meet the 2T'permit by rule' criteria (it's 25-yr hold with a foot of freeboard, meets setbacks and impermeability requirements, etc.). I am still issuing an 'ATC' for this system with the COC, though, just because it's part of our NCG14 permit and oversight, and frankly because of all the rigmarole we had to go through to get there. I think the fall -out will be more specific requirements outlined on our NOI about basic recycle system designs we will accept (I think we're close to saying no recycle pits just dug in the ground for new facilities, please.) Thanks, Bg Bethany Georgoulias Environmental Engineer NCDENR I DWQ I Stormwater Permitting Unit 1617 Mail Service Center, Raleigh, NC 27699-1617 512 N. Salisbury St, Raleigh, NC 27604 Phone: (919) B07-6372 Fax: (919) 807-6494 NEW Website: http://portal.nedenr.org/web/wq/ws/su E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. www.encolabs.com Description: 4 Lab Sample ID:C908925-04 Received: 11/11/09 08140 Matrix: Water Sampled: 11/10/09 13:58 Work Order: C9CS925 Project: Stormwater Sampled By Daniel Walker Classical Chemistry Parameters ^ - ENCO JaCA-Sonviile cprtited ana/yte [NC 4421 Analvte fCAS Numberl $esul EWg Uniu DE RU BaLGII Meth Analyzed U Note Oil & Grease (HEM) [C-0007] ^ < 5.00 mg/L 1 5.00 91<16002 EPA 1664 11/18/09 08:16 MY This report relates only to the sample as received by the laboratory, and may only N reproduced in full. Page I I of 17 From: Wilson, Susan A Sent: Monday, February 08, 2010 8:41 AM To: Davidson, Landon Cc: Edwards, Roger; Georgoulias, Bethany Subject: FW: NCG14 Reapplication headed your way Landon — I'm just going to forward this along to you re. Bethany's concerns on their proposed wash pit. I'll get you guys a copy of what Bethany sends me. Wasn't sure who of your folks to forward this to. Thanks! Susan A. Wilson - Susan.A.Wilson@ncdenr.gov North Carolina Dept. of Environment and Natural Resources Asheville Regional Office Division of Water Quality - Surface Water Protection 2090 U.S. 70 Highway Swannanoa, NC 28778 Tel: 828-295-4500 Fax: 828-299-7043 Notice: E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and therefore may be disclosed to third parties. From: Georgoulias, Bethany Sent: Friday, February 05, 2010 4:18 PM To: Wilson, Susan A Subject: NCG14 Reapplication headed your way Hi Susan, Just a heads up that something will be coming your way in your box at the ARO. We just got an NO1/ATC application in for a new facility that attempted to get a COC back in 2007. We'd requested additional information, that we never got, but there was also some sort of legal action going on with the zoning of the property. Eventually we returned it. It appears they finally got that worked out in the court system, and Blue Ridge Concrete reapplied for NCG14 to build their facility in Weaverville. The new permit number will be NCG140397. I attached the map I made up for the old COC, but the location should still be the same — thought it would be helpful. They've also attempted to address a long list of deficiencies I asked for add info. on way back then. I haven't yet looked at things too carefully to know if everything is addressed completely, but I can tell you that we'd like to coordinate with Aquifer Protection on this review. These guys are proposing a big earthen pit for recycling truck washout water, and at the moment, there's nothing (policy or otherwise) that requires a concrete or lined recycle system basin under our NCG14. We question the prudence of no barrier, though, and I already asked them about pH adjustment because this stuff could still affect groundwater. They're proposing manual adjustment in the pit each day. Not sure who in APS is the best contact at ARO, but I'd advise touching base with them when you get the package. We'd like to know whether our discomfort level with that design is warranted, or if that's just not a problem. (Bear in mind we do have plenty of ready -mix places with pits in the ground around the state; they just tend to be older facilities). Hope you have a good weekend! Bethany Description: 5 Matrix. Water Project: Stormwater Lab Sample ID:C908925-05 Sampled: 11/ 10/09 14:15 Sampled By: Daniel Walker www.encolabs.com Received: 11/11/09 08:40 Work order: C908925 Classical Chemistry Parameters ......-.- ..... .......... - ^ ENCO Cary certified anal4e (NC 5911 Analyte (CAS Numberl Resul}c UAq units DE MDR MU @atch Method Analyzed III Notes PH [ECL-0062] ^ 6.8 pH Units 1 1.0 1.0 9K31015 SM4500-H/B 11/11/09 14:44 FLT Q Total Suspended Solids [ECL-0169] ^ 44 mg/L 1 1.0 9K17006 SM 2540D 11/17/09 09,49 FLT Pagc 12 of 17 . - e �I ANYCENGINEERING, ENVIRONMENTAL LIS'rw4 • RESPOND • PERFORM �C CONSTRUCTION SERVICES WW%V.wpccng.Conl April 30, 2010 Ms. Bethany Georgoulias North Carolina Department of Environment and Natural Resources Division of Water Quality 1617 Mail Service Center Raleigh, North Carolina 27699 RE: NPDES Stormwater General Permit NCG140000 Application p Blue Ridge Concrete � D Truck Washout System MAY — 4 ZM P.O. Box 2594 Weaverville, North Carolina 28787 WA WQ�s arancl Di<NR. Dear Ms. Georgoulias: On behalf of Blue Ridge Concrete, WPC is providing; the attached drawings as discussed with you on April 23, 2010. To provide clarification to our phone conversation concerning; the dried sand and aggregate material from the truck washout ramp area, the material will be initially stockpiled and remained covered on -site until being disposed of: As needed, the material will be properly disposed of by placing; the material in a permitted landfill facility, selling; the material, and/or recycling of the material into the concrete batching operations. Should you have any further questions, please do not hesitate to call us at (912) 629-4000. Respectfully submitted, WPC, Inc. William S. Anderson, 111, I'.I Senior Environmental Engineer Cc: Mr. Johnny Maroney /Blue Ridge Concrete 2201 KUWLANi) Av1:NUE • SAVANNAH, GA 31404 • TEL 912.629.400() • FAX 912.621/A001 CTIARLKSTON • CHAR1,E) TIi • COLUNI1i1A JACKSONViLLE • MYRTLE BEACH • SAVANNAHI �D ENGINEERING, ENVIRONMENTAL Lis,rEN • RESPON13 • PFTRF70RM & CONSTRUCTION SERVICES WW%V.W;)CC11g.Cn111 April 15, 2010 Ms. Bethany Georgoulias North Carolina Department of Environnicnt and Natural our •osn Division of Water Quality 1617 Mail Service Centertp ' r �� Raleigh, North Carolina 27699 RE: NUDES Stormwater General Permit NCG140000 Application Blue Ridge Concrete. -- Truck Washout System P.O. Box 2594 Weaverville, North Carolina 28787 Dcar Ms. Georgo>_Ilias: On behalf of Blue Ridge Concrete, WPC is providing the following truck washout revision/submittal and as well as the appropriate responses to North Carolina Department of Environment and Natural Resources (NCDENR) review comments, dated December 28, 2007 as they relate to the washout system. This rc-submittal is being submitted as discussed With you on March 22, 2010 and April 15, 2010. Listed below in ilulics are NCDE-NI Z comments pertaining to the washout 1 recycle system design followed by the appropriate: response. 1. Plans and Specifications: These mist he prepared either by CI ProlCssiomd E"g neer or emplolvee lnlernal to the companj, that is fhlallfle tl to pet'fOrin Such ►i ork in accorckrnce with G.S. 89C-25(7). There were no plans anclspec{1!culinns.frlr the recycle sjslem included Il�ith the application package, uncl neither plans not- calculalionc u,ere signecl, sealecl, and datecl hi, a P.E. Mein .1bur elf' the Final Checklist in the application, page .1.] The plans and specilications have been signed, scaled, and dated by a 1'.E. and are attached as shown on Figures 2-4. Specifications are indicated on the drawings. 2201 ROWLAM) AVENUE • SAVANNAH, GA 31404 • TFL 912.629.4000 • FAX 912,029,4001 CHAR i•Esr'(yN • ClIAlk[.O.rrE • C.OLUNIDTA JACKSONVILLE' • MYlkT1.F 1317ACH • SAVANNAHT RE: NPDkS Stornnrauer General Permit A'CG 140000 Application Blue Riche Concrete an 2. Recycle System Design Calculations JVPC Proiecl No. ii'PC'3407.0010 April 15, 2010 a. There were no details Of the !'ecycle system pi-Ovldc'd. I he site map lust .chows a 50' x 50' "box. " Plans and specifications should be provided thal sho►v the structure in detail, including whether thet-e are multiple selllin,g cells, hove, the tivalet• flows between cells, the proposed berm, whether there is any raml) ,loii,ing into the ivashoul system where trucks r-inse out, etc. I -loll' will the water he reused?' In the plaw process, fi)r more truck washouls, and/nr•.fiw of he!' uses? Based on our discussion with Blue Ridge Concrete representatives, the design of the truck washout system has been revised and the details are provided on Figure 4, Detail Sheet attached. Section 4.2 of the previous submitted Storrnwater Management flan should be replaced with the attached Section 4.2 which presents the revised process Ior the truck washout system. The revised truck washout System consists of a 40' by 15' by 4' concrete ramp with a 10' by 15" by 4" concrete water holding basin. The sides of the truck washout system will be slightly above the facility's finished grade elevation to prevent stromwater runoff from entering the truck washout system. Each concrete truck backs down the concrete ramp and the driver will wash out the truck at the end of each workday with up to 75 gallons of water. Wash water and sand/aggregate will be captured by and retained in the truck washout concrete structure. As water accumulates within the structure, the water level will rise and force the water to flow through the weep holes into the concrete water holding basin. The water will be pumped into the water basin from the ramp area as needed. The water in the holding basin will be used as the truck washout water with a floating pump located in the water basin area. The ramp area of the structure will be cleaned as needed of sandlaggregate material and disposed of properly. Water from the water holding basin will be transferred to the batch water tank and used for concrete batching as needed. b. The ivatei- balance equation provided ft)r the recycle .system in not complele. A ivaier balance .should show all Inputs — Outputs = No Accumulation. The ivaler balance presented in the applicalion package appecn-s to jim calculate design volume. The calculation .should demonslrale a balance between (the ww1tT.wpCC11g.COni P({ge 2 f f ! RE: NPOES Sioninvaler General Permil rvCG 140000 Applicalion Blue Riche Concrete ly, -./ - WWw.wpccng,com 11TC Protect No, JVPC3107.00168 April 15, 2010 wales dispensed by truck ii-as'hottts + design storm vohnne + freeeboard) cmd (the wales to he used) on a daily basis. If all the water will he usecl again fen• the same number of truck washouts, please certify this asstunplion about what "operating volume" means. How will the ,cyslem ensure sutfficient settling so that the wafer can be re-used.fi,r its purpose? See attached Section 4.2, 'fable 2. c, How »>ill the freeboai-cl he 1•estored after- sign{ficanl rain events? The calculations assert the assumption that "operating volume is relained in the truck washout basin and atlo+recl to percolate into the soil within 2-5 c1ays. " This implies that (1) the enlire operating volume will exit the .cvslem ►pia percolation into the soil and not by recvcling and (2) the .Soils have an infiltration rate to accommodate this assumption. However, there is no iglbt-mation about the soils to suppoi,i this claim. Fw-lherinol-e, the calculations go on to assume sediment fi-oin concrete owc•k washing will he allowed to build tip to a clepth of 8.5 feet. How will a washout basin with 8.5 ,feel of sediment and concrete residue accumulated at the bollom allow any mltlti-atlon into the soil? Please betlei- explain how the .freeboard will be restored, in what amount of time it is reasonable, and the basis of these assump!ions. The total available capacity for the truck washout system is 8,415 gallons with one foot of freeboard, which exceeds the combined volume (7,878 gallons) of., 1) washing operations, 2) one foot of' freeboard required by North Carolina Department of Environment and Natural Resources, and 3) precipitation resulting from a 25-year 24-hour storm, 5.25 inches. The ramp area of' the truck wash out area will be cleaned weekly of sand and aggregate material such that the capacity of the system will be maintained. CalCulatiOns for the truck washout system are presented in the attached revised Section 4.2 of the Stormwater Management flan. The truck washout system, water level, and the amount of material within the system will be inspected and monitored daily. As discussed in item "a" above, the washout system will fill over time with washout water, rain water in varying amounts of sand, aggregate and minimum amounts of cement. On Page 3 01'4 RE: NI'DES SIm-muwalcr General Pennil NCG 140000 Applicalion Blue Ridge Concrele PITC Project No. OTC'3 F07.00168 Aprit 15, 2010 a weekly basis the wash out material will be excavated and disposed of properly. 11' needed, the water within the washout holdings basin will be pumped from the holding; basin to the batch water tank. d. Olill the truck washout recycle system include a pH ut#ustinent .system? While ol'c'rfloll- may happen rarely in a single rain event tf the Ay.1tent is designed f(!r the 25-year storm. it is a possibilily during the periods Uf chronic rain events. Ei,en if the absence Of pH a(#uslment is based on the slwaetn maintaining enough fi-eeboard to rea5'onahly accommodate consecutive storm ei)enl.1, the calculations imply this system ii,ill be earthen, and not concrete. Ifthis is the case, the design should incorporate pH -control to prevent adverse iml)(icls to groiin&iwfer. 01her",ise, the desig-n and narralive .should clearly, justify tahy there is no pH adjustnient proposed. Please provide additional nlfoi'ination regarding 1.)H adjustment. The facility's standard operating; procedure'�will be to monitor pl-I, by Method 9040C, pl-1 Iaectrometric Measurement, of the washout storage basin on a weekly basis. Based on the measurements, Blue Ridgc Concrete will manually adjust the pl-I in the basin to maintain the water within the regulated pl-1 limit of 6.0 to 9.0. WPC will continue to work closely with Blue Ridge Concrete and NCDF_'NR Division of Water Quality in order to maintain compliance with state and local stormwater regulations. Should you have any further questions, please do not hesitate to call us at (912) 629-4000. Respectfully submitted, � s WPC, Inc. ��.,.�\A GAR% SEAL No. 02140611 — William S. Anderson, III, F.LI:�� •�' N. Senior Environmental Engineer �'14'SANO�.�``% www.wpceng.Coll) Page 4 of 4 Blue Ridge C'oncrefe.Sfornt valet• Management Plug Weaverville, No17h Ccn•olimi RTC Project it ly11C3407.00168 .Icnru ny 22, 2008, Revised Ap1•il 14, 2010 Table 1: SCS Calculations for Stormwatcr Runoff Blue Ridge Concrete, Inc. Weavervillo, North Carolina Calculations for Retention Sizing, Buncombe County A. Runoff Volume (using SCS Method) Pro -Development Q' = ((P-0,2S?y(P+0.8S) S = (10001CN)-10 CN = Composite Curve Number Using Table 3-5 of NCDENR Manual (Clifton Series Soil Is "Group B" Soil) Land Use Area (acres) Curve Number (dimensionless) Area-R'efghted. Curve Number Open Space, Poor Condition, c501/o Grass Cover 2.99 79 23 Total 2.99 23 Composite Curve Number 7 S = (1000179}10 = P - Design Storm Rainfall Depth, 1-yr. 24-hr (from NOAA) Q' = ((P-0 2S?y(P+O.SS) V = Q' ' A, V = Runeff Vol)me. A = 2.997 acres Vprr B. Runoff Volume (using SCS Method) Post -Development Q- = ((P-0.2S?y(P+0.8S) S = (10001CN} 10 CN = Composite Curve Number Using Table 3-5 of NCDEI4R Manual (Clifton Series Soil is'Group 9" Soil) 2.66 2.50 Inches 0,84 Inches 9.110 cubic feet I,an(I Use Area (acres) Curve Number dimensionless Area -Weighted Curve Number RooriConcretc 0.06 98 Grntvel 2 85 22 Woods (Protected From Grazing; Litter and Brush Cover Soil) 0*277 55 15 Total 2,9971 24 Corn oslte Curve Number 1 82 S = (I0001CN)-10 = 2.12 P = Design Storm Rainfall Depth. 1-yr. 24-hr (from NOAA) 2,50 Inches Q' = ((P-0.2S)�y(P+D.8S) 1,03 Inches V = Q' - A. V = Runoff Volume. A = 2.997 acres VPw = 11.161 cubit feet C. Post-Developmeni Volume - Pro -Development Volume Requirementto Capture Difference Between Post -and Pre -Development Stormwater and Retain for 2.5 Days Vpog - VP,Q = 2.051 cubic feet V,� - Vp,e = 15.338 gallons Vpw - VP,o = 155DO gallons (rounded up; 4.2 TRUCK WASHOUT SYSTEM The truck washout system is a 40' by 15' by 4' concrete ramp with a 10' by 15' by 4' concrete water holding basin. The sides of the truck washout systeln will be slightly above the 1-acility's finished grade elevation to prevent stormwater runoff from entering the washout system. Each concrete truck will be washed out at the end of each workday with up to 75 Page 5 www.wpCelig.com Blue Rikke Concreie.Slorr ovaler Management Plan Weaverville, North Carolina WPCProjecl # fiPC3407.00168 Juniany 22, 2008, Revised April 14, 2010 gallons. Wash water will be captured by and retained in the truck washout ramp area and concrete holding basin, As water accumulates within the ramp area of the structure the water level will rise and the water will be forced to flow through the weep holes into the concrete water holding basin. The water will be pumped into the holding basin from the ramp area as needed. '['lie water in the holding basin will be used as truck washout water with a floating pump located in the holding basin. The ramp area of the truck washout system will be cleaned as needed of sand and aggregate material and the matcriai will be disposed of properly. Water from the holding basin will be transferred to the batch water tank and used for concrete batching as needed. The available capacity of` the truck washout system, —8,415 gallons with one fbot of freeboard, which exceeds the combined volume (7,878 gallons) of 1) washing operations, 2) one foot of freeboard required by North Carolina Department of Environment and Natural Resources, and 3) precipitation resulting from a 25-year 24-hour storm, 5.25 inches. CalCulations and applicable reference values are shown below in Table 2. The truck washout system, water level, and the amount of material within the system will be inspected and monitored daily. The washout system ramp area will fill over time with wash water, rain water in varying amounts, sand, aggregate and minimum amounts ol'ccmcnt. On a weekly basis the washout material from the ramp area will be excavated and disposed of properly. III needed, the water within the water holding basin will be pumped from the holding basin into the concrete batch water tank to be used as concrete batching water. The facility's standard operating; procedure will be to monitor pl-1, by Method 9040C, pl-I Electrometric Measurement, of the washout collection area on a weekly basis. Based on the measurements, Blue Ridge Concrete will manually adjust the pl-I in the basin to maintain the water within the regulated pl-I limit of 6.0 to 9.0. Page G WWW%VpCCT19.00177 • Blue Ridge Concrete Storinwater Management Plali Projec! # JJTC3407.00168 lVeaverville, Nor111 Carolina Janucary 22, 2008, Revised April 14, 2010 Table 2: Truck Washout Area Calculations Blue Ridge Concrete, Inc. Weaverville, North Carolina Calculations for Truck Washout System A. Design Volume = Operating Volume + Design Storm Volume +Volume for 1 foot of freeboard AA Operating Volume Operating volume - volume per truck" trucks per day Assumption: 75 gallonsAruck Assumpton: 5 trucks/day Operating Volume (per day) = 375 gallons Or 50 cubic feet A.2 Design Storm Volume Design Storm Volume - (Surface Area (ramp)+ Surface Area (basin))' Design Precipitation Depth Surface Area (ramp) - L•w Surface Area (basin) = Lp w L - 40 feet, Lb = 10 feet, w - 15 feet Surface Area = 750 square feet Design storm is 25+year, 24-hour storm Design Precipitation Depth Is 5.25Inches based on NOAA data for area Design Storm Volume a 750 square feet' 5.25Inches • 1 foot/12 inches Design Storm Volume - 328 cubic feet Or 2.454 gallons A.3 Volume for 7 Foot of Freeboard Volume of Freeboard = (VPasmA' - VP_3,) + Vb.*,' L-10'h Vr,.,,,,� = 112 ' L ' h ' w--> fa' h = 4' and L - 40' 1,2D0 cu ble feet Vo,,,„,,3• = 112 ' L ' h ' w--> far h = 3' and L = 30' 675 cubic feet Vb„„1 • = 4 ' w' 1' 150 cubic feet Volume of Freeboard = 675 cubic feet Or 5.049 gallons AA Required Design Volume Required Design Volume = Operating Volume + Design Storm Volume+ Volume for i foot of freeboard Required Design Volume = 1.053 eublc feet Or 7,878 gallons B. Required Depth of Washout Basin Volume -V-(12'L'h'w)+(Ly•h'w)-(5h'•w)+(Lb'h•w) Depth -h - (sgrt(20 ' w' V + Lb' w) - Lb' w) l (10 • w) Depth - 2.7 feet C. Total Volume of Washout Basin = Total Volume = VP,,,,a• + Vb,,,, j, Vp—, r = 675 cubic feet Vb i'x 450 cubic feet Total Volume = 1,125 cubic feet Or 8,415 gallons D. Total Operating Days of Fresh Water Without DisposallReuse Design Volume 7,87E gallons Actual Volume 8,415 gallons Additional Capacity - Actual Volume - Design Volume 537 gallons Operating Volume Per Day 375 gallons Operating Days - (Additional Capacity! Operating Volume Per Day) + 1 Day 2 days 4.3 STORMWATER RETENTION BASIN 'I'11e storrnwater retention basin is designed to be 200 Feet long and 30 Feet wide at the surface, and 5 iect deep with sides constl•Llcted with 3:1 slopes. Its construction Volume 'TA sV�s u>,svpc:cFig. coil] Page 7 Georgoulias, Bethany From: Thornburg, Nathaniel Sent: Monday, April 12, 2010 6:51 AM To:, Montgomery, Lori; Georgoulias, Bethany Subject: RE: Flotation Calculation for structures below grade Bethany, In the past we have followed the following two guidelines for buoyancy and leakage testing. Leakage Test Specifications? ♦ Ensure that leakage test specifications have been that will insure that any exfiltration.occurs at a rate which does not exceed twenty (20) gallons per twenty-four (24) hours per 1,000 gallons of tank capacity. Buoyancy calculations? ♦ Ensure that flotation calculations have been completed and are accurate, and ensure that the plans match the. requirements of the calculations. In general 1.5 is a good safety factor. Flotation calculations should only include the weight of the water at minimum depth. For leakage testing, they will need to conduct a 24 hour static.test showing the ,611Vdoes n' o" f exceed the 20 gallons perj,,000'gallons of tank capacity ovena�24 hour period... o For buoyancy, I usually ant ok with a safety factor of 1.2 if they do not account for soil overburden. If they do use soil overburden, I use a SF of 1.5. For a partial -grade tank, I'd be cotnfor#ahle with a SF of 1.2. Nathaniel Nathaniel D. Thornburg — Environmental Engineer Aquifer Protection Section Land Application Unit 1636'Ylaii Set -vice Center .Raleigh, NC 27699-16.,36 . 919-715-616(.) 919-715-6048 FAX litto://norta1.iicdenr.ore/web/ivu/ans/fait - Please note: my e-mail address has changed to natlianiel.thornbtlrg(@ncdenr.gov DISCI.AINIER: All e-mails sent to and from this account are subject to'the North Carolina Public Records Law and may be disclosed to third parties. From: Montgomery, Lori Sent: Friday, April 09, 2010 4:01 PM To: Georgoulias, Bethany Cc: Thornburg, Nathaniel Subject: RE: Flotation Calculation for structures below grade Bethany — it has been a while since I have looked at buoyancy stuff myself. Attached is a rudimentary spreadsheet that has been used to check buoyancy for septic tanks. I think we typically prefer to see a safety factor of 1.5 with no allowance for soil cover or minimum water weight in the tank.. But you can see that the spreadsheet allows you to look at different scenarios for safety factors and soil/water weights. I have been somewhat flexible on this in the past b/c we do not 1 have.the criteria specified anywhere in rule or policy. If it looks like floatation could be a problem, then they usually can easily add some type of anti -floatation ballast. As far as leakage/pressure testing, I usually just make sure the specs at least address some type of method they plan to use for testing to ensure no leakage for some defined period of time. Nathaniel may have some better wisdom to offer -on that one. Thanks, Lori Lori A. i19ont,,oinet_v, PE Envirownentctl Engineer NC Division of illaterQualitl' Aquifer Protection Section Land Application Unit phone: (919) 715-6187 fit.: (919) 715-6048 Ptea�w n,Ae: MV e..-ma l address has chasiced to Iori.montgomerV(@ncdenr.gov. DISCLAINIER: All e-mails sent to and from this account are subject to the North Carolina Public. Records I-aw and may be disclosed to third paities. From: Georgoulias, Bethany Sent: Friday, April 09, 2010 2:31 PM To: Montgomery, Lori; Thornburg, Nathaniel Subject: Rotation Calculation for structures below grade Hi there, I'm getting things back in for that Ready Mix recycle system project that we talked about, and it looks like they're going to go with a concrete structure partially below grade. We'll probably be able to review this one on our own, but I did want to ask about a couple things on your checklist. One is flotation calculations for tanks constructed below -grade. I've never done or reviewed those before; do you all have guidance or an example on that? I need to ask the engineer to submit it, and I'm assuming he'll know what I mean, but if not... would be nice to be prepared to talk about i'r more with him. Also, under `Specifications,' there's an item that says `Means for ensuring quality and integrity of the finished product including leakage and pressure testing.' Could you give examples of what you accept for that? Thanks for the help! Bethany Bethany Georgoulias Environmental Engineer NCDENR I DWQ I Stormwater Permitting Unit 1617 Mail Service Center,Raleigh, NC 27699-1617 512 N. Salisbury St, Raleigh, NC 27604 Phone: (919) 807-6372 Fax: (919) 807-6494 NEW Website: http://Portal.ncdenr.org/web/wq/ws/su 2 Georgoulias, Bethany From: Wilson, Susan A Sent: Tuesday, March 16, 2010 10:00 AM To: Georgoulias, Bethany Subject: RE: blue ridge Yeah — that's exactly the problem I was realizing in talking to Bev — no firm stance on saying "no". I'd say if they don't line it —all bets are off and they have to go through APS for "concurrence"/recommentdations — not permitting — but the same review process: Lengthy process, etc. Hey — unfortunately I'll be out in the field this afternoon (I'll call you when I get back). I can also see about grabbing Bev tomorrow morning? Susan A. Wilson - Susan.A.Wilson@ncdenr.Rov North Carolina Dept. of Environment and Natural Resources Asheville Regional Office Division of Water Quality - Surface Water Protection 2090 U.S. 70 Highway Swannanoa, NC 28778 Tel: 828-296-4500 Fax: 828-299-7043 Notice: E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and therefore may be disclosed to third parties. From: Georgoulias, Bethany Sent: Tuesday, March 16, 2010 9.56 AM To: Wilson, Susan A Subject: RE: blue ridge Hey —just got your message. Yes, we can talk more because it's complicated. I'll call you after lunchtime. I know APS keeps thinking if they don't meet deemed permitted, they need a permit from APS. That would be true, EXCEPT ... we wrapped that "permit" (i.e., authorization to operate a recycle system) under the NCG14, so here we are with the added duty of permitting such a system (so the permittee only has to get one permit). No one is APS has ever said, "yeah, you should make 'em line those or build concrete, or it's no go," so we've gotten push back to keep permitting pits in the ground as just fine. I agree, we should push new facilities. We just need some help in making the case (and maybe drive us to a policy on not permitting new pits in the ground for recycle systems). Ok, gotta run to a conference call on a mining O&M plan (another fun wastewater activity. Who says we're not diversified here in SW?) Thanks for the help with this one!! Will talk this afternoon, Bg Bethany Georgoulias Environmental Engineer NCDENR I DWo I Stormwater Permitting Unit 1617 Mail Service Center, Raleigh, NC 27699-1617 512 N. Salisbury St, Raleigh, NC 27604 Phone: (919) 807-6372 Fax: (919) 807-6494 NEW Website: http://Portal.ncdenr.oro/web/wq/ws/su E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties. From: Wilson, Susan A Sent: Tuesday, March 16, 2010 9:43 AM To: Georgoulias, Bethany Subject: blue ridge I'll call you again — but —ref. This (2) 15A NCAC 02T .1003 PERMIT'FING BY RE.GUI,ATION (a) The f0ll0w3,!,g systems are deemed permitted pursuant to Rule .01 13 of this Subchapter provided the system meets the criteria in Rule .01 13 of this Subchapter and all criteria required for the specific system in this Rule: (1) Return of wastewater contained and under roof within an industrial or commercial process where there is no anticipated release of wastewater provided the facility develops and maintains a spill control plan in the event of a release and no earthen basins are used. (2) Recycling of rinse water at concrete mixing facilities for concrete mix removal from equipment provided the ws.<tewater is contained within concrete structures, there is sufficient storage capacity to contain the runoff from a 24-hour, 25-year storm event plus one foot freeboard and the facility develops and maintains a spill control plan in the event of a wastewater release. The facility must notify the appropriate Division regional office in writing noting the owner, location, and that the design complies with the above criteria. (3) Recycling of wash and rinse water at vehicle wash facilities provided the wastewater is contained within concrete, steel or synthetic structures (i.e. not including earthen basins), all vehicle washing is conducted under roof and there are no precipitation inputs (direct or indirect), and the facility develops and maintains a spill control plan in the event of a wastewater release. (4) The reuse or return of wastewater within the treatment works of a permitted wastewater treatment system. (b) The Director may determine that a system should not be deemed permitted in accordance with this Rule and Rule .01 13 of this Subehapten-This determination shall be made in accordance with Rule .0113(e) of this Subehapter. Susan A. Wilson-Susan.A.Wilson@ncdenr.gov North Carolina Dcpt. of Environment and'Natural Resources Asheville Regional Office Division of Water Quality - Surface Water Protection 2090 U.S. 70 Highway Swannanoa, NC 28778 Tel: 828-296-4500 Fax: 828-299-7043 Notice: E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and therefore may be disclosed to third parties. A4*T 5�-ar� Cutouw, I?[sawrMcrt or FNVn7 wry, Nei NaLm. Rr.;ajp NOTICE OF INTENT Division of Water Quality 1 Surface Water Protection National Pollutant Discharge Elimination System NCGI40000 FOR AGENCY U56 ONLY Date Received I Mon�7th�I Da __!car Ccr,ificata of ovcrn c 1 4 Check N Amount 31 2 _10Of Pcmit Assi ncd to National Pollutant Discharge Elimination System application for coverage under General Permit NCG1 40000: 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 NOI 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 facilities must comply with requirements of 15A NCAC 2H .0138 & .0139. Construction of wastewater treatment facilities (this includes recycle systems) at new or existing plant sites requires submission of three (3) sets of plans and specifications signed and sealed by a Professional Engineer (P.E.) or qualified staffz along with this application. A copy of the design calculations should be included. Please see questions 14 & 15. �Wk For questions, please contact the DWO Regional Office for your area. (See page 5) (Please print or type) f) Mailing address of owner/operator (address to which all permit correspondence will be mailed): Name Johnny Maroney Street Address P.O. Box 2594 City Weaverville State NC ZIP Code 28787 Telephone No. 828 450-4706 Fax: 828 _ 765-9544 (Call first) 2) Location of facility producing discharge: Facility Name Blue Ridge Concrete Facility Contact Johnny Maroney Street Address 50 Murphy Hill _Road City Weaverville State NC ZIP Code 28787 County Buncombe Telephone No, 828 450-4706 Fax: 828 765-9544 (call first) Page 1 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-229-071408 Last revised 7114108 `.`f..:;;.:. .:�idl. mil!-:•rrtt r_rvf... �� ,cif. . v NCG140000 N.O.I. 3) Physical location information: Please provide a narrative description of how to ge1, t to the facility (use street names, state road numbers, and distance and direction from a roadway intersection)From Asheville, cake VS-19N/US-23N to miles toward Weaverville. Take Exit 17 toward Flat Creek and turn left on Buncombe School Roan, o mi ea rn g o Uia Mars hilloa e r1glit onto (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 35d 43' 34 .83 " Longitude 82d 33' 11.37"(deg, min, sec) 5) This NPDES Permit Application applies to which of the following: eNew or Proposed Facility Date operation is to begin ❑ Existing 6) Standard Industrial Classification: 2010 Provide the 4 digit Standard Industrial Classification Code (SIC Code) that describes the primary industrial activity at this facility SIC Code: 3 2 7 3 7) Provide a brief description of the types of industrial activities and products produced at this facility: (Include a site diagram showing the process areas present at this facility.) Concrete Batch Plant 8) Discharge points / Receiving waters: How many discharge points (ditches, pipes, channels, etc.) convey stormwater and/or wastewater from the property? One What is the name of the body or bodies of water (creek, stream, river, lake, etc.) that the facility stormwater and/or wastewater discharges end up in? Flat Creek 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). N/A Receiving water classification (if known): N A Note: 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-I or freshwater ORW. 9) Does this facility have any other NPDES permits? No ❑ 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)? NeN0 ❑ 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 4Yes h If yes, please briefly describe: Stormwater will be directed Loa retention basin on -site. &tormwat er will not be allowed to flow into the truck wash out area, and washout fluids will not be allowed to flow over the bermed edge of the truck washout area and he discharged with the stormwater. Page 2of5 SW U-229-071408 Last revised 7/14/2008 .......... NCG140000 N.O.I. 12) Does this facility have a Stormwater Pollution Prevention Plan? ❑ No Yes f yes, when was it implemented? To be implemented _post construction. 13) Are vehicle maintenance activities occurring or planned at this facility? WNo ❑ Yes Wastewater 'Treatment Desl_gn Information 14) Are discharges occurring or planned from any of the following process wastewater generating activities? Vehicle and equipment cleaning ❑ Yes ,eNo Wetting of raw material stockpiles ❑ Yes No Mixing drum cleaning ❑ Yes No If yes to any of the above, please describe the type of process used to treat and/or recycle the process wastewater. �,� For a sufficient application, you must provide design specifics (e.g., design volume, retention time, surface t�� area, etc.) and calculations to demonstrate compliance with permit effluent limits (pH — 6-9 SU, Total Suspended Solids (TSS) — 30 mg/l, and Settleable Solids (SS) -- 5 ml/l.) [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 NOI. 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 plans 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: If 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 Only in a limited capacity depending on the amount of water present within the washout basin. There will not he 0Yes an effluent discharge from the washout basin. If yes, what size storm event is the system designed to hold before overflowing? (for example, 10-yr, 24-hr) 25 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)]. r�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 mg/I, and Settleable Solids (SS) — 5 ml/l), 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-229-071408 Last revised 7/14/2008 NCG140000 N.O.I. 16) Are wastewater treatment facilities (including recycle systems) planned in the 100-year flood plain? )�No ❑ Yes if so, 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) WN .s facility a Hazardous Waste Treatment, Storage, or Disposal Facility? 0 ❑ Yes b) Is this facility a Small Quantity Generator (less than 1000 kg. of hazardous waste generated per month) of haz rdous waste? ,7N0 ❑ Yes c) 1s this facility a Large Quantity Generator (1000 kg. or more of hazardous waste generated per month) of hazardous waste? No ❑ Yes d) 1f you answered yes to questions b, or c., please provide the following information: Type(s) of waste: How is material stored: Where is material stored: How many disposal shipments per year: Name of transport 1 disposal vendor: _ Vendor address: 18) Certification: North Carolina General Statute 143-215.6 B(i) 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 rote 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 falsities, 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. I 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 lete, an accurate. Printed Name oZeAl'—,. son Signing: ! `^�►� �• Title: - �� (Signature of Applicant) /2 4 (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 09107/2007 S•.-r rr.:: �::.. , . •rev. r•r�: s c _ v.., . , .... -.. ._--" NCG i 40000 N.O.I. Final Checklist This application will be returned as incomplete unless all of the following items have been included: Check for $100 made payable to NCDENR. This completed application and all supporting documentation (including design details and calculations for treatment systems). 1�' t if an Erosion & Sedimentation Control (E&SC) Plan is required from Division of Land Resources (DLR) or local designee: documentation verifying applicant has developed and submitted that Plan to the governing agency (required per 15A NCAC 02H .0138). For new sites (or sites that will install new treatment facilities): Three (3) copies of plans and specifications for wastewater treatment facilities (including recycle systems), signed and sealed by a Professional Engineer or qualified staff meeting requirements of G.S. 89C-25 (7). ' ❑ For existing sites: three (3) copies of plans and specifications for wastewater treatment facilities (including 1 recycle systems) as built, stamped and sealed by a Professional Engineer, or (only if plans not available) a detailed diagram of treatment systems in place that includes information such as tank volumes, dimensions, retention time, piping, settling basin details, etc. A site map showing, at a minimum, (existing or proposed): (a) outline of drainage areas, (b) storm wate r/wastewater treatment structures, (c) location of storm water/wastewate r outfalls (corresponding to which drainage areas), (d) runoff conveyance structures, (e) areas where materials are stored, (f) impervious areas, and (g) site property lines. A county map or USGS quad sheet with location of facility clearly marked. Mail the entire package to: Stormwater Permitting Unit Division of Water Quality 1617 Mail Service Center Raleigh, North Carolina 27699-1617 Note The submission of this document does not guarantee the issuance of an NPDES permit. For questions, please contact the DWQ Regional Office for your area. DWQ Regional Office Contact Information: Asheville Office ...... (828) 296-4500 Fayetteville Office ... (910) 433-3300 Mooresville Office ... (704) 663-1699 Raleigh Office ........ (919) 791-4200 Washington Office ...(252) 946-6481 Wilmington Office ... (910) 796-7215 Winston-Salem ...... (336) 771-5000 Central Office .........(919) 807-6300 Page 5 of 5 SWU-229-071408 Last revised 7/14/2008 'EN wwxv.wpceng.com JEERING, ENVIRONMENTAL NSTRUCTION SERVICES January 28, 2010 Ms. Bethany Georgoulias North Carolina Department of I.nvironment and Natural Resources Division of Water Quality 1617 Mail Service Center Raleigh, North Carolina 27699 RE: NPDES Stormwater General Permit NCG140000 Application Blue Ridge Concrete P.O. Box 2594 Weaverville, North Carolina 28787 Dear Ms. Georgoulias: LISTEN • REVONI) • PERPORM On behalf of Blue Ridge Concrete, WPC is providing the following re -submittal and responses to North Carolina Department of 1nvironment and Natural Resources (NCDENR) review comments, dated December 28, 2007. This re -submittal was submitted and returned in 2008 due to the property not having the appropriate Buncombe County zoning consistency. This issue has been resolved, please see the attached Buncombe County Zoning Consistency letter of December 11, 2009 along with the Buncombe County. With the property now having the correct zoning, the NPDES Permit NCG140000 Application is being resubmitted. This cover letter highlights the requested information based on the past review. Listed below in italics are NCDhN.R's comments followed by the appropriate response. 1. Plans and Specifications: These inust be prepared either by a Professional Isngineer or employee internal to the company that is qualified to perform such work in accordance with G.S. 89C-25(7). There ivere no plans and specifications for the recycle systein included with the application package, and neither plans nor" calculations were signed, sealed, and dated by a P.F. 111ein four of the Final Checklist in the application, page 5._1 2201 IZOWLANI} AVENUE • SAVANNAH, GA 31404 • TrL 912.629,4000 • FAX 912.629,4001 �� C HARLESTON • CHARLOTTR • C.OLUMBIA JACKSONVILLF, • MYri'f a BEACH • SAVANNAt-I RE: N!'DES Stornnvater General Permit NCG 140000 Application Blue fudge Concrete WPC Project No. WPC3407.00168 January 28, 2010 The plans and specifications have been signed, sealed, and dated by a P.E. and are attached. Specifications are indicated on the drawings as well as in the Stormwater Management Plan. 2. Site Map Item six of the Final Checklist in the application, page 5_] a. The site map does not show an outline of drainage areas, or which drainage areas correspond to which outfall. The drainage sheet (figure 3) is provided in the Stormwater Management Plan. All drainage at the facility is sheet- flow towards the proposed stormwater retention pond. The stormwater retention pond has one discharge outfall. b. The site map does not indicate the location of stormtiiwater discharge outfalls. The stormwater discharge outfall is shown on the drainage sheet (Figure 3). c. The site, map does not specify where materials will be .stored (e.g., aggregate piles). The site map (figure 2) has been revised to show the locations of all aggregate, and sand stockpiles. c! Will aggregate Miles he irrigated? Please clarify on the snap or in the application, even if no discharge is expected. The stockpiles are not to be irrigated. No discharge is expected. e. The site rnop does not clearly indicate which areas are to be impervious, graveled, etc. Does the magenta outline of' the plant .site represent the graveled area, drainage arect, or something else? There was no legend to clarify. A legend has been incorporated into the drawings in order to indicate property boundaries, gravel areas, drainage contours, etc. www wpceng.conl Page 2 of 7 RE: NPDES Stormwater General Permit NC'G 140000 Application Bhie Ridge Concrete 3. Recycle System Design Calculations WPC Project No. WPC3407.00168 January 28, 2010 a. There were no details of the recycle system provided. The site map just shows a 50' x 50' "box. " Plans and specifications should be provided that show the structure in detail, including whether there are multiple settling cells, how the water flows between cells, the proposed berm, whether there is any ramp flowing into the washout system where trucks rinse out, etc. Flow will the water be reused? In the plant process, for more truck washouts, and/or for other uses? Details of the truck wash out area are provided in Figure 4, Detail Shect. Section 4.2 of the Stormwater Management flan presents the process for the truck washout use. As presented in the Stormwater Management flan, the truck washout system is a conical bermed basin 50 feet in diameter and 10 feet deep. The sides of the truck washout basin will be sloped 4:1. Each concrete truck backs up to the berm and the driver will wash out the truck at the end of each workday with up to 150 gallons. Wash water will be captured by and retained in the truck washout basin. As water accumulates within the basin a floating pump could be used to recycle water during washing operations. Water would then be pumped from the basin and used to help rinse sediment from the trucks, thereby reducing the total amount of Iresh water used during the process. As needed, maintenance will occur to maintain the slope of the basin and surrounding berm. h. The water balance equation ,provided for the recycle syslein in not complete. A water balance should shore all .Inputs — Outputs = No Accumulation. The water balance presented in the application package appears to just calculate design volume. The calculation should demonstrate a balance between (the water dispensed by truck washouts + design storm volume + freeboard) and (the water to be used) on a daily basis. If all the water will be used again fbr the same number of'truck washouts, please certify this assumption about iwhal WPC JdAk www.wpceng.cocn Page 3 of 7 RE: NPDES Stormivaler General Permit NCG 140000 Application WPC Project No, WPC3407.00168 Blue Ridge Concrete JaniraYY 28, 2010 WT-I Z--I �) XA'� www wpceng.corn "operating volume" means. Ilow will the system ensure sufficient settling so that the water can be re -used for its purpose? A water balance equation is not applicable to use on the truck washout basin and therefore it is not included in the revised Stormwater Management Plan. c. How will the freeboard he restored after significant rain events? The calculations assert the as.sunlption that "operating volume is retained in the truck washout basin and allowed to percolate into the soil within 2-5 days. " This implies that (1) the entire operating volume will exit the system via percolation into the soil and not by recycling and (2) the soils have an infiltration rate to accommodate this assumption. However, there is no lnf )rination about the soils to support this -claim. Furthermore, the calculations go on to assume sediment from concrete truck washing will be allowed to buildup to a depth of 8.5 feet. How will a washout basin with 8.5 feet of sediment and concrete residue accumulated at the bottom allow any infiltration into the soil? Please better explain how the freeboard will be restored, in what amount of time it is reasonable, and the basis of these assumptions. The capacity of the truck washout basin is 118,000 gallons with one foot of Freeboard, which exceeds the combined volume (22,500 gallons) of 1) washing operations, 2) one foot of freeboard required by North Carolina Department of Environment and Natural Resources, and 3) precipitation resulting from a 25-year 24-hour storm, 5.25 inches. The soils on -site are (Clifton Soil'_Series_whichhas an-infiltfation rate=of_0.-4_to_0:5`galloiis per days E_per. square -foots Even in the case in which the truck washout basin is filled with 5 feet of washout sediment, 55,000 gallons of water can be contained in the basin while still maintaining 1 foot of freeboard. Calculations for the truck washout system are presented in the Stormwater Management Plan. The truck washout basin, surrounding berm, water level, and the amount of material within the basin will be inspected and monitored daily. As discussed in item "a" above, the wash out basin will fill over time with wash water, rain water in varying amounts, sand, aggregate and minimum amounts of cement. Once the wash out area has filled with five feet of wash out material, the L Page 4 of 7 RE: NPD !.S Storraivater General Permit NCG 140000 Application Blue Ridge Concrete JYPC Project No. WIC3407. 001 G8 January 28, 2010 material will be excavated and disposed of properly. (If -needcd-_tlze�water witl�in the washouC5asin will=15e pumpcd-from-the was. hout_basinJilit, C_the watterstrag' ge_tank-to_be_used=in_the_concreetd� atcl�ing-operations. This will accommodate settling of the truck drum contents, maintain the required free board, as well as allow for potential water use and prevent any wastewater effluent overflow of the washout collection area. d Will the truck washout recycle system include a pII adjustment .sysletn? While overflow may happen rarely in a single rain event if the system is designed for the 25 year ,storm, it is a possibility during the periods of chronic rain events. Even if the absence of pH adjustment is based on the system maintaining enough freeboard to reasonably accommodate consecutive storm events, the calculations imply this system will be earthen, and not concrete. If this is the case, the design should incorporate pII-control to prevent adverse impacts to groundwater. Otherwise, the design and narrative should clearly justify why there is no pH adjustment proposed Please provide additional information regarding pII adjustment. The facility's standard operating procedure will be to monitor pH, by Method 9040C, pIl Electrometric Measurement, of the washout collection area on a weekly basis. Based on the measurements, Blue Ridge Concrete will rmanually_adjust 11he p_fifi-ttiie-basin_to.maintain_the-water-within- the- rcguIdted7 L�H limit of 6:O�Io..9:0� e. Please clarify is the assumption of the number of'trucks per clay is based on an average or maximum design scenario. The assumption of the number of trucks is based on the maximum. 4. Stormwater Retention Basin Design Calculations a. The impervious area fraction in based on 2,344 square ,feet of impervious surface. It is difficult to discern from the site plan which areas will be impervious. It is also not clear how much of ' the site will be paved or graveled, and whether graveled areas are included as impervious cover' in the runoff volume calculation using the Simple Method. All areas with gravel XA) www.wpcellg.�oIp I'cr��c 5 of 7 RE. NPDES Stormwater General Permit NCC 140000 Application Blue Ridge Concrete JVPC Project No. fVPC3407.00168 January 28, 2010 should be considered impervious. Please revise the impervious area and design calculations if necessary. A legend has been inserted into the stormwater drawings. The calculations using the Simple Method have been revised to reflect the correct impervious areas covered with gravel. Please refer to the attached drawings and the attached runoff volume calculations using the Simple Method. b. If aggregate piles are irrigated at all, any flow from that area (including stormwater that contacts the piles between irrigation) is included wastewater. If any wastewater flows to the retention basin, that ,structure must treat the wastewater to meet effluent limits. No information was provided about whether stockpiles will be wetted or how the retention basin will provide sujjicient treatment to meet TS,5 and pFllimits if applicable. Aggregate piles are not expected to be irrigated. The aggregate bays are positioned with the open side facing the up -gradient side of the property. Stormwater incident on or around the piles will not be capable of carrying particulate from the piles. Therefore, the generation of `wastewater' will not occur to the extent that it would reach the stormwater retention pond. c. Please be aware that Weaverville is a Phase II city, and post -construction stormwater requirements may apply to this project. Buncombe County was recently delegated to administer the post -construction program within its jurisdiction and within some Phase II cities; please consult the County government about retention pond design review requirements. WPC and Blue Ridge Concrete are in continuous contact with the Buncombe County Planning and Development Office. 5. Erosion & Sedimentation Control Plan: No documentation verifying that an F&SC Plan has been developed and submitted to the Division of Land Resources (D.LR) or local delegated authority was included with the application. If ern Ts'&SC Plan is not required, please explain why not; the site map indicates more than one acre of land will be disturbed by this project. fliem three of the Final Checklist in the application, page 51 WW%V.WPCctlg.Col'll Page 6 o f 7 RE: NPIMS Stormwater General Permit NCG 140000 Application Blue Ridge Concrete WPC Project No. WPC3407.00168 danualy 28, 2010 The revised E&SC flan has been provided as an attachment. WPC will continue to work closely with Blue Ridge Concrete and NCDENR Division of Water Quality in order to maintain compliance with state and local stormwater regulations. Should you have any further questions, please do not hesitate to call us at (912) 629-4000. Respectfully submitted, WPC, Inc. /4", Joseph R. Ross, Jr., MS Staff Environmental Engineer ly, w.vw.wpccr,1).com �, %ir�l�errrr�i 011 SEAL No. 02-1406 �R �f •,�r=,r�".:;i��'T. rid William S. Anderson, III,��Fa�,as5�' Vice President Page 7 of 7 ]�ut�rnco �e County Government Planning and Develapnnent Jon C. Creighton 46 Valley Street Assistant Couhty Manager/Planning Director Asheville, NC 28801 Telephone (828) 250-4830 Fax (828) 250-6086 December 11, 2009 Blue Ridge Concrete Properties, U.0 c/o Johnny Maroncy P.Q. Box 501 Spruce Pine, NC Re: Determination of Zoning Consistency Dear Nlr. Maroney, This letter is to confirm that the property at 50 Murphy Hill road (tax lot PIN 9744-50- 416j) was consistent with the rcCluimments of the Buncombe C01111ty Z011i11g Ordlnallce, as this property was nrizoned at the time application was made. ,mis Clcterminatlon is made pLlPillElilt to Ilse riding of'the North Carolina Court of Appeals negating the 'r_onin') of this property, effective April, 2009. Please contact Ind if l call be of furtller assistance. Sincerely, .f Cain I .. Coliliul, AICP, C%0 zoning Ad111inistrator Buncombe County Government Planning and Development Jon E. Creighton 46 Valley Street Assistant County Manager/Planning Asheville, NC 28801 Director Telephone (828) 250-4830 Fax (828) 250-6086 LETTER OF PERMIT ISSUANCE October 15, 2009 Mark Turner, President Blue Ridge Concrete P.O. Box 2594 Weaverville, NC 28787 Dear Mr. Turner, Please find Stormwater Permit No. S-2008-035 for the Blue Ridge Concrete project enclosed. The permit should be posted on the construction site in a location clearly visible to the public. Several procedures are required by the Stormwater Management Ordinance (Buncombe County Chapter 26 Envirorunent, Article VIi Stormwater Management). Please ensure the following items are completed prior to the completion of the Project' 1. An operation and maintenance manual for the stormwater management system is created for the end user of the project. A copy must be. submitted to this office. If a record plat is required it must reference the Operations and Maintenance Manual which instructs the responsible party about annual maintenance tasks for at least a 20 year period. Following completion of the project the following items are required. I. The stormwater management plan designer must submit as -built plans, or certify the existing plans as "As -Built" if no changes have occurred, of the installed stormwater improvements. 2. The developer must disclose which party will be responsible for continued maintenance ou the record Mat and on the stormwater management plan. 3. An Operations and Maintenance Agreement for the stormwater management system must be recorded. See Division 5, Section 5 (f) of the Buncombe County Stormwater Ordinance for more information on the elements of the agreement. 4. The approval of the stormwater permit shall require an enforceable restriction on property usage that runs with the land, such as recorded deed restrictions or protective covenants, to ensure that future development and redevelopment maintains the site consistent with the approved project plans. 5. All maintenance documents requited by this ordinance must be submitted to the Stormwater Administrator prior to record plat approval. In the case of single family lots not requiring record plats, documentation must be submitted to the Stormwater Administrator before building permits can be issued. Should you have gdestions or comments feel free to contact this office at (828)250-4848. �Sincce elly,, 1 Mike Goodson, PE, CPESC Stormwater Administrator Cc: WPC, Inc. Buncombe County Erosion Control Stormwater Management 250-4848 County of Buncombe STORMWATER MANAGEMENT Telephone: (828) 250-4845 Fax: (828) 250-6086 46 VALLEY STREET ASHEVILLE-, NC 28801 LOCATION:. Murphy Hill Road RESPONSIBLE PERSON: Mark Turner Phone: 912/S96-1609 --ff�� J I Ei � a�1. ,,k-ern Ll �� Stormwater Permit No. BLUE RIDGE CONCRETE PROJECT NAME THIS CERTIFIES THAT A STORMWATER PERMIT ZIAS BEEN ISSUED FOR THE CONSTRUCTION WORD SET OUT ABOVE. STORMWATER ADMINSTRATOR THIS CERTIFICATE MUST BE POSTED AT THE CONSTRUCTION SITE IN A SECURE PLACE FROM THE TIME WORK IS COMMENCED UNTIL STORMWATER ADMINSTRATOR GIVES FINAL APPROVAL, A COPY OF TILE STORMWATER PLAN MUST BE AVAILABLE FOR THE INSPECTORS USE AT ALL TIMES. October 15, 2009 %z r� f?i�1riJ, Jlrr-�1�f11•:rr - r.=..ram..__.. .----..._.._ CAVANAU r H Solutions du'ou,,h integrity grid f�nrtnc rsiii� December 31, 2007 Mr. Michael Brookshire, CPESC Buncombe County Erosion and Sedimentation Control 46 Valley Street Asheville, NC 28801 Re: Re -submittal of Erosion Control Permit Application for Blue Ridge Concrete, Inc. Dear Michael, Based on your Letter of Disapproval dated December 19, 2007, we have revised the plans accordingly. Please find enclosed' a one (1) complete set of revised plans We have revised the plans according to the following responses in the order they are listed in the 'reasons for disapproval' letter dated December 19, 2007: 1. We have shown additional Limits of Disturbance around the proposed septic area. This additional area of 0.06 Acres did not change the total Limits of Disturbance area. 2. We have added applicable notes to Sheet C,3.2 which refer to leaving the existing erosion control measures intact. 3, The Stormwater plan has been prepared by another fine and our understanding is that it has been submitted and is under review by the Buncombe County Stormwater Department. Thank you for your valuable time in reviewing this re -submittal. Please don't hesitate to call with any questions. Sincerely, CAVANAUGH & ASSOCIATES, P.A. Larry Lewison Enclosures Cc: Johnny Mwonay Dana Bolden, P,E. :�:f i1T TlII r iT rrxS [ fs.....:� s wf�-r_ rarr ra — — __—.-------- Blue Ridge Concrete, Inc. Weaverville, North Car9liiva• Calculations for Retention Sizing, NCDENR Runoff Volume (using Simple Method) Requirement to Capture First 1 Inch of Stormwater and Retain for 2-5 Days Runoff Volume (in cubic feel) = 3630 * Ra * Rv * Area Rn = Design Storm Rainfall Depth in inches, assume 1 inch 1 inches Rv = 0.05 + 0.91A, IA =. Impervious Fraction Impervious Fraction = impervious AreafTotal Area Assume Areas of Gravel, Concrete, and Roof are Impervious Impervious Fraction = IA = 2.72 acros/2.997 acres = 0.91 RV = 0.05 + 0.9*IA = 0,87 Runoff Volume = 3630 * 1 ` 0.87 * 2.997 = 9,430 cubic feet Runoff Volume = 9,430 cubic feet = 70,538 gallons Runoff Volume = 71,000 gallons (rounded up) BLUE RIDGE CONCRETE, INC NEW CONCRETE PLANT BUNCOMBE COUNTY, NORTH CAROLINA OWNER BLUE RIDGE CONCRETE, INC MARKTURNER MURPHY HILL RD. P.O. BOX 2594 WEAVERVILLE, NORTH CAROLINA 28757 (252) 946-00791(252) 946-7722 (FAX) CAVANAUGH & ASSOCIATES, P.A 1200 CENTREPARK DR, SU4TE 100 ASHEVILLE, NORTH CAROLINA 28805 (528) 255-75961(828) 255-0770 (Sax) SURVEYOR RANDY A. CARPENTER, PLS P,O. BOX 567 SPRUCE PINE, NO 26777 (628) 765-9102 SHEET INDEX C_1.1 COVER C.2.1 LEGEND & NOTES C.3.t SITE PLAN C,3.2 SEDIMENT AND EROSION CONTROL PLAN CAA EROSION CONTROL DETAILS C.4.2 EROSION CONTROL DETAILS PC ORE YQU M 1 CALL 1-500-632-19.2 N.C. ONE -Ca CCNTER a's TNC v. I 8UhC4�lr- --�•YI I tom\�r I I'll f �� 1,26) i I� C I ; ` h •r ! o v7cvvl; ' IWP ,c'Gr ry sCALE �I � �.r„t^�roti•1.:-! �, Mrs ++SI,. •v xN ,rJi a Axx[ urt rAh .:S�n F[:W W.0 .n[.Y ,Sam Hi SJ�xutiL yMNa�'0 ca.o.: :: x .rn•_ xx CAVAN AU G 6 Solutions through integrity and partnership OAii: 0EC£uaER ,2007 ?ROJ. NV.; 01:-07.010 5�iEF7 �.1 Vrtqmlov Ay 2 . I : 1. . ............. ...... - - - - - - - - - - - - - - - - - - ,- -- "Q- jHH; 1 " Q A, 1� to qn; iw ging1jujol; Jim, EMIU41 cg lips, flaf i 112 2 pon 4 1101 frip on jjum!q RON Al - I P AwAn Ion MIN VT Mall 01111 Hg 141 IM AM NY Qj Ohl I uJI, YIP8 Rig Ple roo A .0 I PIVI gv AN -As W&I Sol; I v 11 Rau BLUE RIDGE CONCRETE, INC. A� CAVANAUUH h z LEGEND & NOTES C�. BOUNDARYAND TOPOGRAPHIC SURVEY JAMES COUNSEL PREPARED BY: RANDY A. — 03,1. CARPENTER PILS 0 -s" BrNSIL COLS MICHAEL ANNONL' wo *10 l661" ccmpm x L A RAMSEY or- D, 13. 1000, PC'581 AC TR A PIN 97 44T IS4 02 0167 \ /� / RESoENTm ZONE:011 MiCHA L ANN3W, NATURANOOD'F6, AREA JAMES R. FLY lk WIFE IMOUNE cl 3. 113 . PC 6B 1245.3PC.. 608 PIN 9743 Gt49 5689 9743 0149 8516 �7 RESIDENTIAL i ZONE: OU R OU _gN G -7 OMITS Of�-� Or, I SED L2 95 AC �,PfRa"',-T -0- , . - .. L . . . .... 1-1 " ... - .. -:- m 5P� vr-BAI`�Kk ., .-,' a% 0. A 0 DB20081PG256 all VE�.DRU:�k �PARK]NgRLOA EA F-/T —71—M7 TRUGKPARP*�G GRASSED AREA (7 SPCSI I &PPnaitMATE 3.93 Ac. - CoNCRt% PLANT SITE cc I z• EMPI oyEE PARKINI FCyr C . CNCRL-jE TF :7- PARKING 135 7 AGGRE OAIE1 C31 0 BATrUER FUTURE cp DEVELOPMENT PROPOSED PIIIVAI`� WELL LOCATION) 20 PG. 282 It 151-5�11-1��Z�—ikl z VACANT -A D. B. 49. IqP�kSSFP ARE RCPOSED�� 9743 0149 9316 41 iLVI sm ZONE: OU DAVID HIGH TOWER ml, L 7.32' 35 03 -Z MURPHY HILL ROAC) NCSR 2�34 -Z t4 PROPOSED 30WIDE --�NO RECORDED ROW EXISTS, ENTRANCE APPROX. LIMITS OF NC DOT PRoposEO DRIVEWAY MAINTENANCE RIGHT OF CULVERT DESIGN By WAY OTHERS T 4 PLANTING DETAIL - . s E ?IC Ikqj I"iZRSTATE TO ASHE\ALI-F 1-261 E To WFAVER"LLE — i 26 VV ♦ STCO -- , BUFFER jLRRY COATES '10 1.60 lz" Lu --I CD SHEET NUMBER C.3. 1 ci w N I' P, FINAL DRAWING NOT FOR CONSTRUCTION 2 •.arm• .,,,,.. ty,r:a �,r + �,nn•ar\�.,..u�u:rtntc, .,. <<.,.-z<c�].,...� w. ]], th+% _ ui— i 1 p €yp*y yq{y N � g z 11 A 1 $ F rF EG,P, 7^ r'$O� 3�Pf Q '� 1 1 !Iu r,;O ti1'`'•\ �.r P x 4 Ng Aix R R R R' Lr'm y `"fie, Rt3> 5 v Y.ii� 7 ��•� i ter}+,/ 11. �'`,a_:��r \ \ , m 01 r 91 I rrt r- , �i ,�r:nvti�•-4+G1.0 k zvi.i"s\. \fir] } L O - a .Z myo } .IjZfn mcl rn e n � roc . � m �. w .r... , .� ' ,'' �.,'y.,..:::.• .. n;. 1 + `+ ,, / ' � 7 h l '`( 1, S•' '. \ 2 Y Q ' _A.PPROx �LIMfTS QF�P45EO CONCRETE PLANT y N' O : —_ e,_--.--,t�--= w msV' j E�- A\ht WAit;R LEFE7vTI(x AREA ' ' `^ 3 m FNIONA OTa ERS} CF I' j �� l i..�F .. r, I ,T 9 II I P l yam y _\, S ^ / - w.w.. A , 1 +ti t �..T CY.TI. Is �'. 1 f m1 j / y _I� } \\ I t II m_ r.. - a d{nip ' i _ / rr1% y h + '� - -yE-r� Via-. .-„i, 1 �'v��,i ' •: �'' m1, U •1 Pn izm -<: DO rn ~0 )p�1 5�� / �\.. VIM In.. Ci a v I� '1 5ai 1�,✓+�.. 'SJ' �^ r f� I I..S � £ �Q$ - kl;_r, \�,, S8 .. �'��a�°ac'�,,•�',*y'/�/Y m c,; C)El o ci 1 � � z T7 D.4r[: O — Z OEr)LiJLtE!t 2OC? p� +° m r PROJECT NO.: RFC OC] 0?I.C'7,0 i0 OFSIGNEO: 1 9 �`4 m c C.4 c` w' OESCRIPTION BLUE RIDGE CONCRETE, INC, ac-Esc co,-- nt ry3r/0 NEW COUCRETr PUNT EROSION AND SEDIMENT CONTROL PLAN CAVANAUGH Solutions through integrity, and partnership G•wW^ a Aua,.ru, P., rtm Gtie.pvr. b,.�, Sr. re0. AUWr.. rvr YCMS ptrtSSMPsyc' Cpr$SSasTt1 w�.uotir�,gle�,mumn PAM. LOG SUSPENDED ON STAKE LOCATED WHERE DIVERSION ENTERS TRAP CLASS B STONE 5• MIN I' THICK OF j 57 STONE �I.S' 3600 CO- FT/ACRE ti,1 5 MAX. I I 5 M1N. MEASURING STAKE MARKED AT E `FILTER FABRIC 25% FULL LEVEL. NOTES: CROSS SECTION 1. USE FOR DRAINAGE AREAS ., NOT EXCEEDING 2 (TWO) ACRES. OVERFILL 6" FOR 2. EARTH BERM SHALL BE STABILIZED W/ SEEDING SETTLEMENT SEE EROSION CONTROL PACKAGE I q• MfN, I 5 "}" EMERGENCY BY-PASS _ - �-SE BELOW 2: SIDE OFnDAM LED TO? SLOPE MAX FILTER FABRIC_.._) MIN I:I SIDE SLOPE MAX STONE SECTION ilua MO ORAIV�GE 41FA MTU11M0 MEA sv R41 {-olcrle SaOPE UEPIIt uE RLpARED YRfaE PROV�LEO EA ala>nEP u AvriOH uwv 1 112 1.12 29 6� L.{ 13 � Al2 � ABi 13'-l2 I.I�O S L 1 1.36 1 1-36 19 52 2-1 3.1 4,696 5A40 1,412 2.020 INSPECT TEMPORARY SEDIMENT TRAPS AFTER EACH PERIOD OF SIGNIFICANT RAINFALL. REMOVE SEDIMENT AND RESTORE TRAP TO ITS ORIGINAL DIMENSIONS WHEN THE SEDIMENT HAS ACCUMULATED TO DNE-QUARTER THE DESIGN DEPTH OF THE TRAP. PLACE THE SEDIMENT THAT IS REMOVED IN A DESIGNATED DISPOSAL AREA AND REPLACE THE CONTAMINATED CHECK THE STRUCTURE FOR DAMAGE FROM EROSION OR PIPING. PERIODICALLY CHECK THE DEPTH OF THE SPILLWAY TO ENSURE IT IS A MINIMUM OF 1.5 FT. BELOW THE LOW POINT OF THE EMBANKMENT. IMMEDIATELY FILL ANY SETTLEMENT OF THE EMBANKMENT To SLIGHTLY ABOVE DESIGN GRADE. ANY RIP RAP DISPLACED FROM THE SPILLWAY MUST BE REPLACED IMMEDIATELY. TEMPORAF3Y__SWIMENT TRAP DETAIL NOT TO SCALE SCALE TO DIRECT FLOW AWAY COMPACTED SOIL---\ -� 2' MIN FROM EROSION SENSITIVE .AREAS �- la" AiN F�_OVd I _ IL-LI Ir Ir--fLL� -111 -uL IIrl l 1i31' I�If I�IF�li=il!-II.--IF=I-I�II�i� Y�i1;�IGlI� =ii "II 6' TYPICAi_ TEMPORARY DIVERSION DETAIL NOT TO SCALE DIVERSION RIDGE RES WHERE GRADE EXCEEDS 7L 2 K OR CRFATO' ROADWAY T$TER FABRIC SECTION A - A R a \ NOTE: / �i lz BE SPILLWAY USE NOSAGS. STRAW SALES E2 STRAW BALES, SAOR OTHER APPROVED MLIHODS Q7 OR CONTINUOUS BERMMOO F C EOUNALENT HEIGHT TO CHANNELIZE RUNOFF TO lz BASIN AS REOUiRFD. cp SUPPLY WATER TO WASH io R WHEELS IF NECESSARY 01 `j 6F it \ Q ryo EIAII -�,J L FIDW t b • MUMMER SIi�--, • COU AGGREW r_A •' 25' MIN. C a: MIN. 6" (150mm) THICK +ASR4 (3.6m) O L.�.T'c.1,`"#T`Y"Y�fa� •�KY!S,-.T i.�,.St�'.tiJ' I/Oj ONERSION RIDGE 50' (15m.) MIN. PLAN 1. THE ENTRANCE SHALL 8E MWNTAINED IN A CONDITION THAT WELL PREVENT TRACKING OR FLOWING OF S£OIMENT ONTO PUBLIC RIGHT-OF-WAYS. THIS MAY REQUIRE TOP DRESSING. REPAIR AND/OR CLEANOUT OF ANY MEASURES USED U CLEANED PRIOR TO ENTRANCE ONTO PUBLIC J. WHEN WASHING IS REOLRRED, IT SHALL BE 4 N DONE ON AN AREASTABUZEO WITH CRUSHED Q A. CONSTRUCTION ENTRANCE/EXIT TO BE INSPECTED AND MAINTAINED CL O To TRAP SEDIMENT. 2, WHEN NECESSARY. WHEELS SHALL BE z RIGHT-OF-WAY. O U U C) STONE THAT DRAINS INTO AN APPROVED SEDIMENT TRAP OR SEDIMENT BASIN. W Z z AF'IEft EACH STORM EVENT. O � TEMPORARY GRAVEL CONSTRUCT10N � O ENTRAEXIT j W (4C DETAIL a a u W O a FLOW 1 2 i 2' NIN.� SHEET NUMBER F 0 1�,t: COMPACTED GRAVEL / f 1- Hn*I;'1iI ic" MlN. Ilfr �r�' _l�iF�':iI�JI II 3-u IIf��AII,=r_1ff'F�n'11a'- o 0 U•_6 N 2 NOTE: DIVERSIONS MUST BE MAIN TAlNEO THROUGHOUT CONSTRUCTION WATER BAR �a�� LINED DITCH DETAIL w Z DETAIL NOT TO SCALE w w SCALE: NOT TO SCALE FINAL DRAWING NOT FOR CONSTRUCTION l.AIT I U1�14T„P.a s ` r�a.�iws z�ilxlseeEia:nic olaavl !!T us.f] fTSK (s' 0.YM1 CROSS SECR l �!!1 �aq,[p li64 1!' DEPr.j } �f / �a��EvmtRpva Cwrinn Sr>n 50.1E SECnON fVIR0.aSn9LDe0rt(ao1G rRCA]N ROCK CHECK DAM DETAIL. NOT TO SCALE iirm'smuirl SIMMONSissi�ilrr risrwM ■■s�iiisii0erriii�i rirl'iQiii- �iM►1oEri a ar��i�pipiirir�r�jj i�:is�. �r■�Ri�� awlrRl�i�■ OWNS r`-- TEMPORARY SEEDING RECOMMENDATIONS VANTER - EARLY SPRING SEF7DINf: MIXTIIRF Species Rate (lb/Acre) Rye (grain) 120 Korean lespedeza 50 Omit annual lespedeza when duration of temporary cover is not to extend beyond June Mountains - Above 25GO It: Feb. 15 to May 15 Below 2500 ft: Feb. t to May 1 Vno AYFNOMENTS Follow recommendations of sail tests or apply 2,000 lb/Acre ground ogricuUurut limestone and 750 Ib/Acre 10--10-10 fertilizer. Apply Straw netting NAG S75 to all ditches and/or diversions or equal per manufacturers requirements. MAINTENANCE RefertiliZe if growth is not fully cdegva!e. Reseed, refertiV2e and mulch immediately following erosion or other damage. N1RC rEIAY ,( TER FABRC VEIL POSE ryA NRAI a uu dP ;r 1L BA'% UPENDS ANO CplPACT MOROUp LY CROSS-SECTION VIEW NAWTENINICE NOTES: 1. llISKCT SEBWLNT FENCES A LEAST oKE A xEEN ANO A RR EACH RAPIFALL- N E !NT REUUPEU REP NUEPATEL`- 2. SNOULB ME rABRL. CECo.IPGsE dj BECOW FIEFTECTTE PReYi TO 1 END OF IM EXPECTED uSABEE UFE AND THE BARREL Er- BE IIECESSART. ME fA.5MC SHALL BE RE%ACEB PROICPIIT. s. SEBPFENt DEP TS 91plED eE RELOV D Al -.ER EACH SIOR. EKNT_ TWE CARE TO AvW UHDERV XU THE FENCE OM IG 4EMiOUT. A. RCMOAE ALL FENCNG UAIEFb LS AI10 UIISTASLE SED1NENr DEP091S AND 6Ra1.^, THE AREA TO CRADr AND STABy/TE IT AFrER nIE ONTRIEu WG Dn AINACE AREA MAs BEEN PROPERL Y SIADel2E0- TEMPORARY SILT FENCE DETAIL SCALE: NOT TO SCALE NOTES: wRE: A UM N CAUCE FABRIC: ST tHEAC PETER FABRIC CERWFED AS1M a 5161 STONE /A wASr M ST�'ZT'_ To BE PLACED e- DEEP POSTS- STEEL - Ill T LONG, 1.33 LB/UAEAR FT sPACD1G: POSES ARE 10 BE A NAXINU4 ff e' APART » JP44LR NarE: SEE PLANs roR umN9oNs ANO MATERIALS .0 BE USED JJ. d, 1. LLS 1. L. rs IiNGSFi OF R1P RAP MRON 2. ALL IREER FASRSC SHOULD BE V1sTCb ef%ERR EN B M AND SOIL FOUNDAnw z1�sLnPE ST STONE AWAFT SOOx FLIER FABIIC Ett APPP.OYEO ECUAL SECTNIN A_A R;P RAE OUTLET PROTECTION nFTAII STEEL Past, 24' .To aor,61 OR STARE rD SUPPORI- %VPGTT RUK to SIDE h'DIE TO SAlZl NI\ SAGGWG ■r ■ _rwi t�� ,' a■ i�r!r n r ■■ r■ i■w 1 r�am y■■ 1: 'a ■■■ a■■M O ir�■ . 'rAr� �r! ' !' irr rrllrE radiii i.irrim iiiirr aI■t■r 3■��r� ■■i �.. ■■■■tea ■rrara rw■wiE■ ro■o . rrrrr- w w■ " °IN-. ■ rarrrr ra.ar..... ■■■i■a■ NoI i ■ a■ 1401602 ... .. ■r ra■w■r war riiw.wrra r LLI1r=U It.-lI rr ■■■ SET rrNCF, COR -E9( QJ DYILAR, STAPLED OR 1RENCHEO el TO BOTTOM OR WE OF BA" @AFFLE_ FENCE DETAIL SCALE: NOT TO SCALE Q z Q a v LM Cn SHEET NUMBER C.4.2 t� O q V a o ie 'o b m n ' C O V Z $ vF" W Icy, W U j J w a o a o [=i i FINAL DRAWING NOT FOR CONSTRUCTION T;7 A 'YA ENGINEERING, ENVIRONMENTAL & CONSTRUCTION SERVICES WWW Wj„C1i com Stormwater Management Plan Blue Ridge Concrete WeaverviUc, North Carolina WPC Project # WPC3407.00168 PREPARED FOR: Blue Ridge Concrete 50 Murphy Mill Road Weaverville, North Carolina 28787 PREPARED BY: WPC, Inc. 2201 Rowland Avenue Savannah, Georgia 31404 (912) 629-4000 January 22, 2008 LISTEN • RESPOND • PERrORM 2201 fZOWLAM) AVENUE • SAVANNAIT, (,A 31404 • TEL 912.029.4000 • FAX 912.629.4001 CHARLFST(JN • C:1'IAR1,0T'rF • C'.OLU\•11HA JACKSONVIIAR • MYK'rLr, BFACH • SAVANNAH Blue Ridge Concrefe,51orlinvater Management Plan Weaverville, North Carolina TABLE OF CONTENTS f,VPC Project 4 WPC3407.00168 January 22, 2008 SECTION PAGE RECORD OF DOCUMENT REVISIONS .................................................................................................. I 1.0 INTRODUCTION ......................................................................................................................... . 2 2.0 FACILITY AND CONTACT' INFORMATION......................................................................... 2 3.0 SITE DESCRIPTION .................................................................................................................. 1.3 3.1 GENERAL SITE FEATURES ....... ................................ ......................... ................................. 3 3,2 SITE. DRAINAGE FEATURES ................................................. ..................... .......................... 3 4.0 CALCULATIONS .............................................. ........................................................................... 4 4,1 RUNOFF VOLUME .......................... ......................................................................................... 4 4.2 TRUCK WASHOUT SYSTEM ..... ............................................................................................. 5 43 STORMWATER RETENTION BASIN .............................................................. ...................... 7 5.0 STABILIZATION ........................................................................................................................ 14 6.0 CONSTRUCTION rRUCTION SEQUENCE AND COST ........................................................................... 15 6.1 CONSTRUCTION SEQUENCE FOR PERMANENTSTORMWATEIR MANAGEMENT MEASURFS........................................................................... 15 6.2 ESTIMATED COST' OF PERMANENT STORM WATER MEAStJRI:-:S ................................ 15 APPENDICES Appendix 1: Storinwater Pollution Prevention Plan (SWPPP) I \V\VNVI Nv p Coll (TICO I I I Blue Ridge Concrete ,Stormivater Management Plan Weaverville, North Carolina RECORD OF DOCUMENT REVISIONS Initial Document Date Prepared Name Of Preparer: Revision Number I Date: Signature of Authorized Representative Revision Number 2 Date: Signature ot� Authorized Representative: Revision Number 3 Date: Signature of Authorized Representative: WPC Project 1# WI'C3407.00168 Junumy 22, 2008 December 4, 2007 WPC, Inc. 10907 Downs Road Pineville, NC 28134 C)IV- �, No. 021408 January 22 2008 �.. �j/�� ''•,.a.sp�'gqtt�,+ ac Page 1 W\v lv.WPcelly.cotlI Blue, Ridge Concrele Stormwater Managemoy Plon Weaverville, Norlh Carolina 1.0 INTRODUCTION IVPC Project # I'VPC3407.00168 January 22, 2008 The purpose of the construction activity that is the subject of this Stormwater Management Plan is to build a concrete batch plant that will supply needed concrete to construction projects in the community. Preparation of this Stormwater Management Plan for the planned Blue Ridge Concrete facility is a requirement of the Buncombe County Planning and Development Department. The plan contains facility and contact information, a site description, stormwater calculations, a narrative that includes the construction sequence and the estimated cost of permanent stormwater measures, and a copy of the Stormwater Pollution Prevention Plan {SWPPP} prepared for the facility, which outlines operations and maintenance procedures associated with the stormwater controls. Site figures are included in the SWPPP. 2.0 FACILITY AND CONTACT INFORMATION facility 'Title: Blue Ridge Concrete 50 Murphy Hill Road Buncombe County Weaverville, North Carolina 28787 Owner Name and Address: Blue Ridge Concrete 50 Murphy Hill Road P.O. Box 2594 Weaverville, North Carolina 28787 End User Responsible for Annual Inspection, Maintenance, and Repair of Stormwater Management System: Johnny Maroney Blue Ridge Concrete 50 Murphy Hill Road P.O. Box 2594 Weaverville, North Carolina 28787 Telephone: 912-596-1609 E-mail: Johnny-kam@bellsouth.net Page 2 w��w.wpccn�.curr� Blue Ridge Concrete Storniwater Management Plan Weaverville, North Carolina 3.0 SITE DESCRIPTION WPC Project it WPC3407.00168 Janvaiy 22, 2008 The Blue Ridge Concrete facility is located to the west of US Highways 19123, off Old Mars Hill Road in Weaverville, Buncombe County, North Carolina (see Figure 1 of the SWPPP — Blue . Ridge Concrete Site Topographic Map). The site is bordered to the north by undeveloped land; to the east by Murphy Hili Road beyond which is undeveloped land; to the west by a stream beyond which is undeveloped land; and to the south by undeveloped land. The site address is 50 Murphy Hill Road; however, the address of 110 Old Mars Hill Road is also associated with the property. 3.1 GENERAL SITE FEATURES 1'his property currently consists of approximately 12.95 acres of undeveloped land, of which approximately 3.93 acres will be developed as the concrete plant that is the subject o1' this Stormwater Management Plan. The retraining 9.02 acres will be undisturbed and reserved for undetermined future development. The 3.93-acre concrete plant will include an office building, a storage building, a silo and two conveyor belt systems (approximately 0.06 acres in total). The remaining areas are 2.66 acres of gravel base, including an unpaved parking lot for employee and concrete truck parking that is planned near the southern boundary of the concrete plant, 0.277 acres. of vegetated, landscaped areas, and 0.933 acres of undeveloped land. A 50-Foot diameter, bermed, truck washout area will be constructed near the northeast corner of the concrete plant. A stormwater retention area is located at the south end of file property. Refer to Figure 2 for additional site details. 3.2 SITE DRAINAGE FEATURES The 1997 "Weaverville, NC" United State Geological Survey (USGS) Quadrangle topographic maps indicates that the slope is in a southwesterly direction across the site with the elevation ranging from 2,165 to 2,105 feet above mean sea level (see Figurc 1). The existing drainage pattern in the area of the planned concrete plant is mainly southwesterly flow in accordance with the topography; however, at the western edge of the area, drainage flows west through the sloped undeveloped area oftlic site towards Flat Creek. The planned drainage pattern is described in the following paragraphs. Surface water (via the onsite stormwater retention area) will be discharged during the 25-year rain event to an unnamed existing drainage ditch. Two drainage areas are planned for the site. Page 3 Ifluu Ridge Concrete; Stormwater Management Plan Wcoverville, North Carolina PITC Project # WPC3407.00168 January 22, 2008 Y Drainage Area 1 (DA1) drains the gravel and building pad areas. Surface flow is directed to the stormwater retention area located along the southern boundary of the concrete plant. The truck washout area is designed not to discharge stormwater or concrete truck washout water. O DA2 is located in the vegetated area along the northern boundary of the concrete plant. The drainage in this area flows southward to the stormwater retention area located along the southern boundary of the concrete plant. Based on information provided by the Buncombe County Soil and Water Conservation District, soils at the site consist of Clifton Series soils. Clifton Series soils consist of very deep, well drained soils on gently sloping to very steep ridges and side slopes of the Southern Appalachian Mountains. Slopes are 2 to 95 percent. The soils formed in residuum weathered From intermediate and mafic igneous and high-grade metamorphic rocks such as hornblende gneiss, amphibollte, and gneiss or schist that is high in ferromagneskan minerals. Neer the type location mean annual air temperature is about 51 degrees Fahrenheit and mean annual precipitation is about 53 inches. Clifton Series soils at the site are in Hydrologic Soil Group B. 4.0 CALCULATIONS 4.1 RUNOFF VOLUME The difference between pre- and post -construction runoff" volunIes was calculated as 15,500 gallons using the Discrete SCS Method. Calculations and applicable reference values are shown below in Table 1. Page 4 .'ywwwpceng.com 13hre fudge Correrete Storinlvaler Alamrgement Plan 1f%euv4:rvi11e, North Carolina Table t: SCS Calculations for Stornnvater Runoff Blue Ridgo Concrete, Inc. Weavorville, North Carolina Cal culatione for Retention Siring, Sun cDmbe County A Runoff Volume (using SCS Method) Pre -Development Q-= ((P-0.2Sft(P+0.8SI S = (1DOOrCN)-10 CN = Composile Curve Number Using Table 3-5 of NCDENR Manual (Clifton Series Soil is "Group B" Soil) WPC Project # Il'PC3407.00168 .larluary 22, 2008 Land Use Area (acres Curve Number (dimensionless) Area -Weighted Curve Number O n Spacc, Poor Condition, <50%Gmss Cover 2.99 79 23 Total 2,9971 23 Composite Curve Nunther 7 S = (10D()n9} 10 = P = Design Stone Rainfall Depth. 1-yr. 24-hr (from NOAA) Q' = ((P-0.2S)1y(P+0,8S ) V = Q' " A. V = Runoff Volume, A = 2.997 acres VP,. = B. Runoff Volume (using SCS Method) Post -Development Q. = ((P-0.2S )2 y(P+0,8S ) S a (10001CNI-10 CN = Composite Curve Number Using Table 3-5 of NCDENR Manual (Clifton Series Soil is "Group B" Soil) 2.66 2.50 Inches 0,84 inches 9.110 cubic feet Land Use Area acres Curve Number dimensionless) Area -Weighted Curve Number Roof/Concrete 0,06 98 Gravel 2.66 85 226 Woods (Protected From Grazing; Litter and Brush Cover Soil) 0.277 55 15 Total 2.997 - 24 Com osite Curve Number 82 S = (10001CN )-10 = 2.12 P = Design Storm Rainfall Depth. 1-yr. 24-hr (from NOAA) 2.60 inches Q' = ((P-0.2S)2y(P+0,8S) 1,03 Inches V = Q" ' A, V = Runoff Volume, A = 2.997 acres VPW = 11,161 cubic feet C. Post -Development Volume - pre -Development Volume Requirement to Capture Difference Between Pont- and Pre -Development Stormwater and Retain for 2-5 Days VPav - VP,e = 2,051 cubic feet VPou VP'. = 15,338 gallons Vosst - VI = 16.500 gallons (rounded up) 4.2 TRUCK WASHOUT SYSTEM The truck washout system is a conical bermed basin 50 feet in diameter at ground surface and 10 feet deep. The side of the truck washout basin will be sloped 4:1 to a bottom diameter of 45 feet. Each concrete truck will be washed out at the end of each workday with up to 150 gallons, Wash water will be captured by and retained in the truck washout basin. As water Page 5 %V,V,V.wpcoll coil Blue Ridge Concrete Stornnwater Management Plan Weai,erville, Norlh Carolina WPC Project # 1VPC3407.00168 January 22, 2008 accumulates within the basin a floating pump could be used, when sufficient water is present, as recycle water for truck washout operations. Water would then be pumped from the basin and used to help rinse sediment from the trucks, thereby reducing the total amount of fresh water used during the process. As needed, maintenance will occur to maintain the basin side walls and the surrounding berm. The capacity of the truck washout basin,----118,000 gallons with one foot of freeboard (-14,000 gallons), exceeds the combined volume (22,500 gallons) of 1) washing operations, 2) one foot of freeboard required by North Carolina Department of Environment and Natural CIa 1 Resources, and 3) precipitation resulting from a 25-year 24-hour storm, 5.25 inches. Even in the case in which the truck washout basin is filled with 5 feet of washout sediment, 55,000 1 gallons can be contained in the basin while still maintaining I foot of freeboard. Calculations and applicable reference values are shown below in Table 2. The truck washout basin, surrounding berm, water level, and the amount of material within the basin will be inspected and monitored daily. As discussed above, the wash out basin will fill over tune with wash water, rain water in varying amounts, sand, aggregate and minimum amounts of cement. Once the washout basin has filled with five feet of washout material the material will be excavated and disposed of properly. If needed, the water within the washout basin will be pumped from the washout basin into the water storage tank to be used in the concrete bitching operations. This will accommodate settling of the truck drum contents, maintain the required Free board, as well as allow for potential water use and prevent any wastewater effluent overflow of the washout collection area. The facility's standard operating procedure will be to monitor pl-1, by Method 9040C, pl-1 Electrometric Measurement, of the washout collection area on a weekly basis. Based on the measurements, Blue Ridge Concrete will manually adjust the pFl in the basin to maintain the water within the regulated pli limit of 6.0 to 9.0. Page 6 ww\V.WPC ell .cona Blue Ridge Concrete S'io•rnrvaler Management Plan Weaverville, North Carolina 'fable 2: Truck Washout Area Calculations Blue Ridge Concrete, Inc. Weaverville, North Carolina Calculations for Truck Washout System 6VPC Project # 1i/PC3407.00168 Junitaly 22, 2008 A. Design Volume = Operating Volume + Design Storm Volume +Volume for 1 foot of freeboard A.1 Operating Volume Operating Volume = volume per truck' trucks per day Assumption: 150 gallonsRruck Assumption: 10 tmckslday Operating Volume (per day) _ Or A.2 Design Storm Volume Design Storm Volume= Surface Area' Design Predpitatlon Depth Surface Area =m� r a 25 feet for 50-foot-diameter Basin Surface Area = Design storm is 25-year, 24-hour storm Design Precipitation Depth is 5.25 inches based on NOAA data for area Design Storm Volume = 1,963 square feet' 525 inches ' 1 footI12 inches Design Storm Volume - Or A.3 Volume for 1 Foot of Freeboard Volume of Frustrum of Right Circular Cone = rT(r,2 + q r2 +r22)hl3 r. = 25 feet rz = 24.75 feet for 50-foot diameter hole with 4:1 slope h = 1 foot of freeboard Volume of 1 foot of freeboard (assumes worst case: freeboard is top 1 foot of conical basin) Volume = Or A.4 Required Design Volume Required Design Volume = Operating Volume + Design Stomp Volume +Volume for 1 foot of freeboard Required Design Volume = Or B. Required Depth of Washout Basin Depth - h - 3V/(Tr(r,2 + r, r2 +r2I)) Depth = C. Total Volume of Washout Basin = Volume = Lower 9 feet (maintaining 1 foot of freeboard) r, rz Volume = Or D. Volume of Washout Basin if bottom filled with 5 feet of sediment Volume a From 1 to 5 feet below ground surface (maintaining 1 foot of freeboard) r, = r2 = volume = Or 4.3 STORMWATER RETENTION BASIN 1,500 gallons 201 cubic feet 1,963 square feet 859 cubic feet 6,424 gallons 25 feel 24.75 feet f feet 1,944 cubic feet 14,541 gallons 22,404 gallons 3,003 cubic feel 1.5 feet 24.75 feet 22.5 feet 15,793 cubic feet 118,131 gallons 24.75 feet 23.75 feet 7,391 cubic feet 55,284 gallons The storinwater retention basin is designed to be 200 feet long and 30 feet wide at the surface, and 5 feet deep with sides constructed with 3:1 slopes. Its construction volume WW JTA %vww.wPcell g.com Page 7 Blue Ridge Concrete Stornnvaler Munagernent Plan Ifeuverville, North Carolina IYPC Project 4 JYPC.3407.00168 January 22, 2008 exceeds the Buncombe County requirement to retain the difference between the pre - construction' runoff volume and the host -construction runoff volume (15,500 gallons). The volume of the retention basin also exceeds the state requirement to capture at least the first one inch of stormwater resulting from a 1-year 24-hour storm at the site (71,000 gallons). The results of the HydroCAD Modeling assessment are shown below. Asheville Concrete Pre - HydroCAD 6.50 Sampler (5 node stn 15097) ISIS] www. wpce17g.c.olll Page 8 Bhie Ridge Concrele Sloi'mit,ater Maiiagemeilt Plan Weciverville, Noi-th Cw-oliila WPC Project 4 DVPC3407.00168 January 22, 2008 Table 2: Pre -Construction Input Data Summary Summary for Subcatchment 1S: Sheet Flow Runoff — 2.09 cfs @ 12.25 hrs, Volume= 0,200 af, Depth= 0,84" Runoff by SC TR-20 method, UH=SCS, Time Span= 0.00-26.00 hrs, dt= 0.05 hrs Type 11 24-hr 1-Year 24-Hour Rainfai1=2.50" Area (ac) CN Description 0.277 79 <50% Grass cover, Poor, HSG B 2,720 79 <50%Grass cover, Poor, MSG B — — 2.997 79 Weighted Average 2,997 Pervious Area Tc Length Slope Velocity Capacity Description _ (min) (feet) (f AO (fttsec) (cfs) 1.5 41 0.3415 0.46 Sheet Flow, Sleep Sheet Grass: Short n= 0.150 P2= 3.50" 27.5 491 0.0326 0.30 Sheet Flow, Sheet Grass: Short n= 0.150 P2= 3.50" 29.0 532 Total I+rewoi.ia: 269crs T f E I {pTpYpe 1124'-hrs 1=Year 24 Hour.. J.Rainfatl� 2�5D11 ! Runoff Area 2.997 a'e 1. NRunoff V lume 0:209 of I4 `r � � s I 1 � •'"� r a t � J11 ll,". ` i RunoDepth= 0 k84 ,, i ow Length=532' T1c=29; 0 m i n .I CN=79 J- j- --- T - II-�- -- i f I I I i Figure 1: Hydrograph for Sheet Flow prior to Construction for 1-Year 2444our Event Page 9 NVWkv.WPCC11�.CD111 Blue Ridge Concrete Stornovater Managemei?l Plcu7 6Weavery lle, North Ccrrolhia Protect OU6ram Nude View VMl SeUt H* WPC Project # WPC3407.00168 Jw7itary 22, 2008 Table 3: Post -Construction input Data Summary — Sheet Flow Summary for Subcatchment 1 S: Sheet Flow Runoff = 5.54 cis Q 11.98 hrs, Volume= 0.269 at. Depth> 1.05" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Type 11 24-hr 1-Year 24-Hour Rainfall=2.50" Area {act CN Descriotion 0.277 55 Woods, Good, HSG B 0.060 98 Paved parking & ioofs 2.720 85 Gravel roads HSG B 3.057 83 Weighted Average 2.997 Pervious Area 0.060 Impervious Area Te Length Slope Velocity Capacity Description min feet fVft) (fVsec) (cfs) 3.2 41 0.3415 0.21 Sheet Flow, Steep Sheet Woods: Light underbrush n= 0.400 P2= 3.50" 3.4 491 0.0326 2.40 Sheet Flow, Sheet Smooth surfaces n= 0.011 P2= 3.50" 6.6 532 Total -WINxii WkvW.WI)CCnti.Cun1 Page 10 Flue Ridge Comi-ele.57or-m>tiralei- Maiiagemml Plem Weavei-ville, North Carolh7a WPC Project # I9'PC3407.00168 deoma7y 22, 2008 I i I S51 C$ I ' Type 11 24 yp 1 r r Year 24-Hour �....,_ Rainfall=2-.50" i i Runoff, Areal 3.057 ac { Runoff Volume=0.269 of i r t ; '11.05 1 1 �;... f." ".Runoff 1]eptli� ". 1 Flow Lersgth=532' Tc=6.61min T---'CN=83- 3 if I I I I I _.. _......_, __. -.a.._. 2 p 1 2 3 4 5 6 7 8 9 1p It 12 13 14 19 16 17 18 19 20 21 22 23 24 Figure 2: Hydrograph for Sheet Flow following Construction for 1-Year 24-Hour Event Table 4: Post -Construction Input Data Summary - Retention Pond Summary for Pond 2P: Retention Pond Inflow Area 3.057ac, 1.96%Impervious, Inflo.vDepth > 1.05" for 1 -Year 24-Hour event Inflow = 5.54 cfs @ 11-98 hrs, Volume= 0.269 of Outflow = 0.00 cfs @ 0.00 hrs, Volurne= 0.000 of, Allen= 100%, Lag= 0.0 min Primary = 0.00 ON @ 0.00 hrs, V6lrlme= 0.000 of Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dl= 0.05 hrs Peak Bev= 2,065.91' @ 24.00 hrs Surf.Area= 0.144 ac Storage= 0.268 at Plug -Flow detention time= (not calculated: initial storage excedeS outflow) Center -of -Mass del. time= (not calculated: no outflow) Volume Invert Avail.Storage Storage Oescription 91 2,064.00' 0.729 of 30.00'W x 200.001 x 5.00'H Prismatoid Z=0.3 Device Rouling Invert Outlet Devices _ 141 Primary 2,069.00' 5.0' long x 4.0' breadth Broad -Crested Rectangular Weir Head (feet) 0.20 0.40 0,60 0.90 1,00 1,20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.90 5,00 5.50 Coef. (English) 2.38 2.54 2.69 2.68 2,67 2,67 2.65 2.66 2.66 2,68 2.72 2.73 2.76 2.79 2.88 3,07 3.32 Primary OutFlow, Max=0,00 cfs @ 0.00 hrs HW=2,064,00' (Free Discharge) t1=13road-Crested Rectangular Weir ( Controls 0.00 c(s) VXA "VwkV.whccng.Co111 Page 11 Blue Ridge ConcreteStorinwater Management Plan Weaverville, North Carolina WPC P;-ujcct 4 WPC340700168 Jan awy 22, 2008 t lap— InflowArea=3.057 -ad :Peak Ele�=2,065.91;' St6r6ge=O:268 of J 4 Figure 3- Hydrograph for Retention Pond Flow following Construction for 1. Hour Event f 2.D65 065 0:1 c 15 02 075 03 B35 04 0.45 05 0.55 08 Figure 4: Storage Volume for Retention Pond based on Elevation -Year 24- Page 12 'IV %V\,V. \V p cc 11 g. co; I I Bluc Ridge Concrete 5'lornnvater Management Plain Wc,averville, Norllr Carolina JYPC Project 9 JVPC3407.00168 .1017101y 22, 2008 Table 5: Post -Construction Summary -- Retention Pond (Multiple Events) Events for Pond 2P: Retention Pond Event Inflow Primary Elevation Storage (cfs) (cfs) (feet) (acre-feet) 1 -Year 24-Hour 5.54 0.00 2,065,91 0.268 2-Year 24-Hour 7.65 0.00 2,066.62 0.372 5-Year 24-Hour 10.93 0.00 2,067.73 0.535 10-Year 24-Hour 13.62 0.00 2,068,64 0.673 25-Year 24-Hour 17.32 0.47 2,069.12 0.729 0 CO2 0.04 coo 0.0e Q) 0-12 o,Id 016 p,1B 02 0.22 024 026 H9uk!� Slwq� lace I+�I, Fi,,ure 5: Storage Volume Required based on Design Outflow — t-Year 24-Hour Event VY, ww«twpceng.c:om Page 13 Blue Ridge Concrete .Siormwater Management Pia17 J-Veuven)ille North Carolina anpeal�eerpe Broad-Credeed Rec,pn0dar.Mhh 2,069 I I 1 2,068 I I I 2,065 I s 2,665# i i I ! i I UIC Project # PVPC3407.00168 January 22, 2008 � 2,064 0 0.05 0.1 0.16 0.2 0,25 0'3 0.35 0.4 0.45 0.5 0-65 0.6 0,65 Figure G: Discharge Rate based on Water Elevation 5.0 STABILIZATION Methods used to stabilize the site include the following: l . Maintaining a gravel bed across unpaved and non -landscaped areas of the site to reduce the potential for ponding and promote flow to the stormwater retention area. 2. Maintain rip rap at the discharge (west end) of' the stormwater retention area to control flow, particularly during storm events. 3. Maintaining a grassy retention basin and a grassy berm around the truck washout basin. Page 14 �<<w��.�u�cGltti.com Blare Riche Cnlrcrele Stornmaler Management Plan Weaverville, North Cal-olimr 6.0 CONSTRUCTION SEQUENCE AND COST WPC Project # WPC3407.00168 January 22, 2008 G.I CONSTRUCTION SEQUENCE FOR PERMANENT STORMWATER MANAGEMENT MEASURES Construction of the permanent stormwater management measures will be completed prior to initiation of'concrete plant operations. 6.2 ESTIMATED COST OF PERMANENT STORMWATER MEASURES 'rhe estimated cost of the permanent stormwater measures is as follows: Materials $5,000 Installation $15,000 Total Estimated Cost $20,000 VY, i mvmwpceng.com Page 15 TOPO! map pnnted on 11/12/07 from "North Carohna.tpo" and "UnUded.tpg" 62'35.000' W - e2'34.000' W 82-33.000' W 82132.000' W WGS8482*31.000' W � � rl+a ! �i �i_� f�.r �LY� y k� r l �' -w•'_- �.:' '-�:^:r..r r`_ i._ (�lr�• � is ,,�1e sty. f; '� =, ti fr . _ t r } _7 " ,•1�-• :t.�..-�� 'Bi•_ �._ fir. e = i r� \ frr �J 1 �� ,1r '• I'. (, 1.' rtti._ `; _.._,✓.^ r r'` — `r �1.: \` 6►t C 13B �. ( � ', t` `.! 1, 0` , r; -. i".: ,J S - N t:•� •.D k+..8 _ L:,-r \ r._ 1 r�qw\ x..•/,.�._ Gentry.G`r. '�� p.,,,,r�{ .i.E• �u.�rry ��-:�_,'\ lr, B�cJi ti`` s•✓f y i�� AV yam` �� y f r._%�jiC 0 r / F /'mod. �h, ;rp ✓ 1 `t L� � -;.• � + %� Jryr`�' 1��r1� J -J _ _ /' 'JC` t c. :�P-k rl� �`f a ? 'J '."-/`•J J� , lr ��G•-_• i t �V n SMvru,..ti' 4 ?(f & a,:—:;=-�' ;: h� kMl,t" �'k • tL • ::�• S J I ram. j,r, isf "' �•�0� -'s=' cn j j•� �?:r ,l��' `_�'"�-� `� �, �'�I �'.1 � �7` �' �. +'s• ? - �, ��o � , ft.r�' �;f•lj.�� A �r ; ��,� -`':5:�1 /E.•,. J`! {:-s.,.n c. � �u ?.• � �} �i�a -,S l _ _ — V-�- .mil �' 't `[� �l�C� � — '• �•' � . I� i � , �� I �,,! �•�! ' t '�r" (,y{-o•`lll �w �I ��•cir.` i�'- _ t•!r •-i `' J/ `5��' ' ( ^� �l- illb's .T :t{�' c•R �kN• /subject Property ��-;;' r'f �1 1 i. AU)ff »-• ,�1 w r�-`,_ � �-s � -:I rr .�net �•..I � r� •J pr •��1J1f�� l - vC' � Lr [ �'�t'/�a'/l� :e�t+eenaa : *�0.�•1. 2 � � r/. t� a ��r c �G' %%tj � Y C:'�' �� c'•• ;; \'. r--'� rli �• :� 1=�.i z � r � .:r'�-.:��i`,'�:5 C�_ _ �- �x ` ' 1'� 1 d 1 f L �l. r` i+. .. L•,'.�1 C.L,q � �� ,�-., � � :� � �„• I (� .L r' �'�� ( 7 i ii��• -S � �. l- 3 #� t � rs eJ ::�•:-7- ��/1 �, ltar , �/r�� `�i' �,v -"•fir �t' � :r:�, �' �' . �� • :� �r�f7/-��•!'� /��.i�,(i 1�, 11(r �'�•`�la�Y.� w'="` i� �•rr � li' f� �.:rfi l .{° •>t. �++ r, � /i��.�. ,�✓� ! .-f /_-- a '✓ : C v �� .1k4L� �-ilt�-` -y,i �r��1 t,fi l''�((1rJ. 1r `C'\ /"� f��-�..,�•�• '- �' *��• A "? � �~ L < �' '_r� 11 L � " r f� r } I =�. _i• i v "! r •, w�_ ,a 6 4 1' ! 1}f r1 f r ��r. tL 'vi P', ��° a� p o�• �1 _ •'• Nil �� .�r ±il• �� .1T, f.�.��' O��'I • a :� �-!.}r�r C' .� :� 't4��' '�-�#�� Y ..��,Y i t t a- ��'�"" '�'.r'3s6' 1 ,(to��-� l'•� sl f � r��_�l �'- (( •� `: �'� 1��`�(' J�I�J� i ',"I/U'f "f �Z�''w '.-�-� 4��v�y��` � �31 "1 � ' �_�i� ��._=�n�'_ x �. -1 ��}� "/ [ _—�•L l� -f �54 r,-Y� �y 1.��l.F '•YJ _�*�� 1 � �7•. F .1 PTr {1`r vj� _��y�+ [ J` / J -'f•[' 7: �1J :l�J: it'{^tea.' e(1 L\�i?1'6?E /-=�,��p•• f�Xf. �� , • J 7; �11�a-•.'\•e�;J';�1� -i :Irr' 'lr� .C'�•�" i. ' 1-¢ni'S} ,ram CAS-r -�l' f f!`••r \ �' � � S( � � �L--1i �a�� -o •�: �y '• '� � 1.6 Z'ZT ��[�- -��, .^ � - •' � •--" ir_ J / ✓�a�l� j G¢r rv� }I ! •'�i �r�`5 i Liu ( %� �. ._ ...�. s � � -'�• .WhI Kn a r .L j• ~ii�o �`� �~ { �� ;3 ` "`--'1.' �} �'....• \.1 S C ':11 �.-f`yl�+s`-�--.� 1�'�. ?i h y r „;. rat+' Jf j. ` i!� 1 �Ld ..' ' rf• �` � , � � •1L,�• ,r' r1. ; (_"_� _+ �.t�:� �r / (( S. ad"�'.� ``—"._..�_�� _ �. 9 xz.r' �'�� fry. �_} t- •"' z 14 ;-C� e.. .M1y ` \ r ._, ..� 1- '•C ."" •t r-. \`.' 4 . \ 1 r, +" t vlr ��,.es�; Sr �'� -0.,� !/_, �� ,} _��• t �, � � ��g. 1 ki r• w�L ��c_,o-,.,e,.7��„ +�.� I } gl � ref' J},yy.��J �� , �,{�"n'�CIp �Y�. �� C ':� ��) J'•��l ' r � `�1� � ` li ��¢�:va �'.. i � �. ��. ; ��u�^�;il�.c�'4-'',�� ' ��r� 1� �iE'7,"E� ��yr (rJ� jl,�o�- `%1 o o in `' (`i.'��` .E r f {' _a5�_ rtq _.^:.. _' ��•l '�• ��/ ?yk t_1r-r'.�.t+r.-�z.l�. > _�- \� ;'�., .,4 �i{"i3'f �!;,� ��+r.,i:?�L��;.`z ��fff 1• �� `�)�;f2 s��Tl - ;(;�r�L�,r^vim<rr, ��'�11�.i�'r' ^-`�� '�� ,.:i��'� ;i 11 L - �� °`o '''-"•J-• NTe �• 'it f�.�7 '..? :.�`.L- ,..'':ids "t�C`rV r _ _ .l-ir'._v`-.�� _� 1 ^.. _ Ir��_ ;I; l� ___.. i. 82135.000' W 62134.000' W 82-33.000' W 82`32.600, W WGS84 82'31.000' W 411E 6. �Om kEEI 0 .--µ At ., �OOJ i.!IfIlls PAWed fmmTOP01 02001 Nabs 1 ;1Lpbic P1oldiry (w,w++r.topo mm) 10907 Cowns Road WP CENGINEERING, ENVIRONMENTAL Pineville, NC Blue Ridge Concrete Site Topographic Map 50 Murphy Hill Road 28134 & CONSTRUCTION SERVICES Phone 704-927-4000 704-927-4001 Weaverville, Buncombe County, North Carolina Source: National Geographic TOPO "Weaverville, NC" 1997 USGS I_Ddljy�Fax L [SCALE: As Shown DATE: 11/12/2007 �F�EPARED BY: MEF PROJECT NO: WPC3407.0016811 FIG. NO: 1 o�pF wArF, pG Michael F. Easley, Governor William G. Ross Jr., Secretary North Carolina Department of Environment and Natural Resources to -C Coleen El. Sullins, Director Division of Water Quality July 2, 2008 C'or-� CC CeAL-r-i - l4e Mr. Johnny Maroney Blue Ridge Concrete Post Office Box 2594 Weaverville, NC 28787 Subject: NPDES Permit NCG140000 Application Proposed Blue Ridge Concrete Plant Application Return 91 186 Buncombe County Dear Mr. Maroney: On January 28, 2008, the Division of Water Quality received your Notice of Intent (N01) requesting coverage under general stormwater permit NCG020000. The Division requested additional information verbally by phone and in an e-mail to your consultant, Mr. Joseph Ross, Jr., on February 11, 2008. Per his request, we then extended the response date to April 24, 2008, and subsequently to June 30, 2008. To date, we have not received any of that information. Therefore, we must return your application as incomplete at this time. Your NO] application package is being returned to you with this letter. The return ofthis application 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 (LAMA), or any other federal or local governmental permit or approval that may be required. If you have any questions concerning this matter, please contact Bethany Georgoulias at (919) 733-5083, ext. 529. Sincerely, 6V'(3 . S i yt,� by . R � for Coleen H. Sullins Enclosure cc: Asheville Regional Office Stormwater Permitting Unit Central Files .Joseph R. Ross, Jr. / WPC, Inc.12201 Rowland Avenue/ Savanna, GA 31404 Wetlands and Stormwater Branch 101l Mail Service Center Raleigh, NC 27699-1617 Phone (919) 733-5093 Internet: h2o enr.stale.nc.us 512 N. Salisbury St. Raleigh, NC 27604 FAX (919) 733 9612 On No thcarolin 111a4lrrr!!t1 An Equal OpportunitylAHirmative Action Employer - 50% Recycled/l0% Post Consumer Paper C4 E C- e www.encolabs.com rr��:..�i rr.e...:��.-. ems.-�.....•...� _ r...�r`., r....•.-..r EWC-P YAI I VI - IVU J-KO' I r 1 ]( LCS (9K11015-BSI) Prepared & Analyzed: 11/11/2009 14:44 Duplicate (91(11015-DUP1 Prepared & Analyzed:/11/11/20M 1 44 Source: C908925-01 1 I pH 5.7 1.0 pH Units 5.7' 0,4 25 Q Batch 9K17006 - NO PREP i i Blank (9K17006-BLKi) Prepared'& Analyzed: 1111712009109:49 i ......... ..... .......... - - .-......... LCS (9K17006-BSI) Prepared & Analyzed: 11/17/2009 09:49 Total Suspended Solids 89 1 0 l 80.0 11l l 82-119 Duplicate (9K17006-DUPI) Prepared & Analyzed: 11/17/2009 09:49 Source: C907507-01 j Total Suspended SOUS 34 .1.0 mg/L 34 1 0 25 r QUALITY CONTROL r'laccirnt I`hprrl Parnmatarc - Aualitu Pnntrnl . oatur YAIG— -- IVUVM Blank (9K16002-BLKi) 12:34 Analyzed: 11/17/2009 16:17 Oil & Grease (HEM) /� 500 5.00 mg/L I LCS (911(16002-BSI) 1 Prepared: 11/16/2009 12:34 Analyzed: 11/17/20C9 16:17 OVI & Grease (HEM) / 39.3 5100 mg/L 43.7 90 78-114 { Matrix Spike (9K16002-MS1) i Prepared: 11/16/2009 12:34 Analyzed: 11/17/2009 16:17 Source: 8905429-02 Oil & Grease (HEM) 45.7 5.64 mg{L 47.0 5.64 U 97 7B-114 Pugs; 14 of 17 NCG140376 01.,(S Su�j t/�y z February 5, 2008 B. Georgou[ias - 140�>9i Blue Ridge Concrete f7� vt6V��" in 20 [ D . rev. 2/11/08 1�� Summary 'Phis facility submitted a Notice of Intent to be covered Under General Permit NCG140000 (Ready-tuixed Concrete). The stormwater discharge drains to Flat Creek (Class C), in the French Broad River Basin. This facility is located in Buncombe County, handled by the Asheville Regional Office. Application review a) The permit application has been "s-igned and sufficiently completed. Yes. b) The SIC code accurately describes this facility's activities and is covered by this general permit. Yes, SIC 3273 (Ready -mixed Concrete). This facility will be a concrete batch plant, an activity similar enough to be included under this general permit. c) Does the facility propose n new or expanding wastewater discharge to ORW waters (not allowed), or waters upstreani of OIZW (special limits may apt ]Jyp No. (1) DEH or Shellfish Sanitation Approval Required? NIA e) Does this facility have other permits? No. Buncombe County will likely issue post -construction stormwater permit of some kind (delegated authority for Weaverville). fj Hazardous Waste Activities? No. g) DLR Mining Perinit status: NIA h) Regional Office input requested: 2/7/08 (ARO contact S. Silvis). RO Approval received: pending... i) Is an ATC Required (NCG02 or NCG14)? Yes. j) Erosion/Sedimentation Plan Approval for NCGIA or NCG02 ATC? Yes — documentation included in application. k) Application approved? Yes. 1) In Mecklenburg or Wake County (If so, copy final COC there)? No. m) Special Notes: None NCG140376 r February 5, 2008 B. Georgoulias Phone logs 2/11/2008, Spoke with Joe Ross, WPC Engineering (912.629.4000). Will send add. info. request via e-mail to irossgwpe.eng.com ATC Review Earti)en washout pit closely resembles a non -discharge system; shouldn't it be lined? What rules and design criteria apply to non -discharge systems of this type? See 15A `1CAC 2T Rules. Review will look to these rules for guidance standards to ensure groundwater is protected. However, not all criteria may apply because this system will still be permitted under an NPDES discharge permit (not necessarily a non -discharging treatment system). 15A NCAC 2T .0801 SCOPE This Section applies to systems not specifically regulated by other rule: in this Subchapter in which the waste is disposed of by ground absorption systems or other non -discharge systems such as infiltration lagoons and evaporative systems as well as authorizations to construct for NPDES facilities. 15A NCAC 2T .0805 DESIGN CRITERIA Design requirements shall be the same as systems permitted under 15A NCAC 02T .0505 except those that are not applicable to authorization to construct type permits (e.g. degree of treatment and irrigation system design requirements) or specifically addressed by Section 15A NCAC 02H .0100. 15A NCAC 2T .0806 SETBACKS Setbacks shall be the same as those listed in 15A NCAC 02T .0306 except infiltration basins, which shall meet the setbacks listed in 15A NCAC 02T .0706 for infiltration units. (Not applied). 15A NCAC 2T .0505 DESIGN CRITERIA (a) The requirements in this Rule apply to ail new and expanding facilities, as applicable. (b) Minimum degree of treatment for new and expanding systems are as follows: (1) For new municipal, domestic and commercial facilities, the minimum degree of treatment shall meet a monthly average of five-day Biochemical Oxygen Demand (SODS) :�30 mg/L; Total Suspended Solids (TSS) :<30 mg/h; Ammonia (NH3) <_15 mg/L; and Fecal Coliforms <--200 colonies/100 ml. r NCG140376 February 5, 2008 B. Georgoulias (2) For expanding municipal, domestic, and commercial facilities except systems subject to Subparagraphs (b)(3) or (b)(4) of this Rule, facilities shall meet the limitation provided in Subparagraph (b)(1) of this Rule. (3) For expanding municipal facilities, except those permitted as new under Subparagraph(b)(1) of this Rule, with lagoon treatment systems, the minimum degree of treatment shall meet a monthly average of five-day Biochemical Oxygen Demand (BOD5) -<60 mg/L; Total Suspended Solids (TSS) 590 mg/f; Fecal Coliforms 5200 colonies/100 ml. No expanding facilities shall be permitted under this provision for any project whose application is received by the Division after December 31, 2011. (4) For expanding municipal facilities whose application is received by the Division after December 31, 2011, except those permitted as new under Subparagraph (b)(1) of this Rule, with lagoon treatment systems, the minimum degree of treatment, shall meet a monthly average of five-day Biochemical Oxygen Demand (BOD5) S30 mg/L; Total Suspended Solids (TSS) 590 mg/L; Fecal Coliforms -<200 colonies/100 ml. (5) Treatment for other operations shall be based on producing the quality effluent used in documenting protection of surface water or groundwater standards. (c) All wastes shall be applied at agronomic rates unless predictive calculations are provided that document State groundwater standards will be protected. (d) All treatment/storage lagoons/ponds shall have at least two feet of freeboard. (Not applied). (e) Waste, including treated waste, shall not be placed directly into, or in contact with, GA classified groundwater unless such placement will not result: in a contravention of GA groundwater standards, as demonstrated by predictive calculations or modeling. (f) Treatment works and disposal systems utilizing earthen basins, lagoons, ponds or trenches, excluding holding ponds containing non -industrial treated effluent prior to spray irrigation, for treatment, storage or disposal shall have either a liner of natural material at 1,.�ast one foot in thickness and having a hydraulic cc�nductivit_y of no greater than 1 x 10-6 centimeters per second when compacted, or a synth tic lino of sufficient thickness to exhibit structural integrity and an effective hydraulic conductivity no greater than th, r_ of the natural mager-ial. liner. (g) The bottoms of earthen impoundments, trenches or other similar excavations shall, be at least four feet aLove the bedrock surface, except that thI_ b0ttOm oaf wxcavations which are less than four feet above l.:)ed.r.oc.kshall. have a liner with a hydraulic conductivity no greater than 1 x 10-7 centimeters per second. Liner thickness shall be that thickness necessary to achieve a leakage rate consistent with the sensitivity of classified groundwaters. Liner requirements may be reduced if it can be demonstrated by the applicant through predictive calculations or modeling methods that construction and use of these treatment and disposal units will not result in contravention of surface water or groundwater NCG140376 February 5, 2008 B. Georgoulins standards. (h) Impoundments, trenches or other excavations made for the purpose of storing or treating waste shall not be excavated into bedrock unless the placement of waste into such excavations will nor result in a contravention of surface water or groundwater standards, as demonstra:ed by predictive calculations or modeling. (i) Flow equalization of at least 25 percent of.the facilities permitted hydraulic capacity must be provided for all seasonal or resort facilities and all other facilities with fluctuations in influent flow which may adversely affect the performance of the system. (j) By -pass -and overflow lines shall be prohibited. (k) Multiple pumps shall be provided if pumps are used. (No t app I ie d). (1) Power reliability shall be provided consisting of: (1) automatically activated standby power supply onsite, capable of powering all essential treatment units under design conditions; or (2) approval by the Director that the facility: (A) serves a private water distribution system which has automatic shut-off at power failure and no elevated water storage tanks, (B) has sufficient storage capacity that no potential for overflow exists, and (C) can tolerate septic wastewater due to prolonged detention. "m) ;- water-tigl t Se%al OFF all treatment/stcirage uni-r-s or minimum oS: tw0 feet p::,tecti ,r. from 100-yc: ar flood be provided. (n) Irrigation system design shall not exceed the recommended precipitation rates in the soils report prepared pursuant to Rule .0504 of this Section. (,D) A minimum of 30 days :,f-�esidual st C)raga sl-I�.l l bM �rovide�. ip) Disoo;5al areas sI,al.l be Jesi'�rled to fiainl:airG a oni-_- -.rDC)L. separation Y e.LwrNen t�ae high itiai:C';:r to ?l_, ;end 'l:h', C3round (q) 'Inar' public: shall bc-, rot i}_it , cc._:ss to the :r,t:l.;e<i irrigation area grad trea"Llr.ent fr_Cii.iti.c's. (r) Influent pump stations shall meet the sewer minimum design criteria as provided in Section .0300 of this Subchapter. (s) Septic tanks shall adhere to the standards established in 15A NCAC 18A .1900. (t) The irrigation system shall be provided with a flow meter to allow accurate determination of the volume of treated wastewater applied to each field. NCG140376 y};a .7r.+.. "+ February 5, 2008 B. Georgouh is The proposed washout pit is not lined but does not meet the definition of a high rate infiltration system: .f.rom 15A NCAC 2T .0702 DEFINITIONS "High -rate infiltration'": (in non -coastal areas) shall mean ... an application rage that exceeds 1.50 gallons of wastewater effluent per day per. -square foot of land (16.8 inches per week). r: From submittal, soil infiltration rate is only 0.4-0.5 gallons per day per square foot. This system is also not necessarily a closed -loop recycle system, but the applicant proposes to reuse the wastewater on an intermittent "recycle -as -needed" basis to prevent overflow. Design proposes sufficient capacity and storage/disposal capability to maintain. Questions: ■ What liner will be used? (See 2T .0505 for criteria). If no liner, we need an engineering demonstration that groundwater standards will not be contravened. ■ What is the vertical separation from the water table? (Should be at least 1'). Separation from bedrock? (Should be 4% unless a liner with appropriate permeability used) ■ How will the basin be dredged while maintaining integrity of the structure? (equipment access, pump, etc.) ■ Plans show a graveled berm around the truck basin, but the narrative states the berm will be grassy/vegetated. Which is it, and how will it maintain the integrity of the basin? ■ To where will water be pumped when solids need to be cleaned? Note — no pumps, piping, or water storage tank included on plans. Even if floating pump used, how will it get to the tank, and how will the amount of solids churned in the basin or high pH affect its reuse'? ■ What is the size of the storage tank? ■ In the event enough water cannot be reused in the concrete batch process, how will excess water be disposed of? NCG1.40376 February 5, 2008 B. Georgouiias ■ Narrative states pH will be checked on a weekly hasis and manually adjusted, and gives no details about the chemicals or treatment that will be used to neutralize the wastewater. This is unacceptable. Weekly is too infrequent, and an automated system should be used. Please design and provide details of this treatment process step. ■ How will the sediment level in the basin be gauged? ■ A basin this large and deep with only a few feet of bermed edge around it seems like a safety hazard on a job site like this; how will that be addrE� -ed?