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Home My WebLink AboutNC0004308_CORRESPONDENCE_19870327NPDES ®OCVNENT SCANNINS COVER SNEET NPDES Permit: NC0004308 ALCOA -- Badin Works Document Type: Permit Issuance Wasteload Allocation Authorization to Construct (AtC) Permit Modification Complete File - Historical Correspondence Instream Assessment (67b) Environmental Assessment (EA) Permit History Document Date: March 27, 1987 WIVLO dacta.XXXeat its printed Qn renae paper - iXs.ore any context 4>n the reirerne miae � �.`._IMINMA COMPANY OF AMEHICA i ,. SADIN, N )HII-1 CAH4 OE INA f.:8009 1987 March 27 i MAR State of North Carolina Department of Natural Resources & U mmnity Development 512 North Salisbury Street REC!. ^ Raleigh, North Carolina 27611 /T Attention: Mr. R. Paul Wilms, Director APR 3 Division of Environmental Management tga7 TECHNICAL SERVICES BRAiVCFf Gentlemen: Reference: Renewal of NPDES Permit No. NC0004308 We would like to'address your proposed changes to existing parameters in this letter. Comments on proposed new parameters will follow in another letter. Over the last several months, we have been assimilating and graphing our NPDES sampling data back through 1981. tAhile it has taken a tremendous amount of time to accomplish, we believe it to be critical to our, and your, understanding of the data. In general, we feel that the data collected and presented here verifies that we can substantially reduce our monitoring and still protect our environment. In this time of increased competition in our market, we must do only the monitoring that is absolutely required and make it count! We appreciate your patience with us on preparing this data. Attached please find our cents on the existing proposed parameters. Very truly yours, CONRAD A. CARTER, JR., P.E. MANAGER, ENVIRONMENTAL PROTECTION CACJr:rbh cc: J. L. Fox/T. W. Baugh (Letter & Comments only) P. R. Atkins/M. E. Kommer (All) CIA . 0 PAGE 1 COMMENTS/ON PROPOSED NPDES PERMIT NO. NCO0O43O8 - EXISTING PARAMETERS Discharge (O02J- Storm Drain, Boiler Blowdown,__Non-Contact Cooling of �_ v! / Air Compressors --� -- -- 1. Temperature A. B. Measurement Fre�guengy We have been monitoring our effluent monthly under our old permit. You have proposer] that we monitor our effluent upstream and downstream weekly. If you will refer to Attachment no. 1, you will see that our discharge temperature closely follows the ambient air temperature and is very consistent from year-to-year. With a river flaw of 6000 MGD and a discharge flow of 0.5 MGD, a 2.80C rise in the Yadkin River's ambient water temperature would require a water discharge temperature of 33,600 C! This is impossible. We cannot see any merit to increasing our measurement frequency. Accordingly, we propose to monitor Discharge 002 for temperature on a monthly basis. Sampling ]Location We have been monitoring our effluent only under our old permit. You have proposed that we monitor effluent, upstream and downstream. Since this discharge enters Badin Lake in a 0.5 mile long cove with no decernable flow ern, we caiuzot understand an up/downstream measurement can be made. We propose to collect a "Downstream" sample between the effluent and the main river. The sample would be taken from the bank at a point 50 yards from the effluent. 2. Flow Discharge Limit You have proposed that the permissible average flow limit be reduced from 0.5 to 0.232 MGD. As you can see on Attachment #2, the flow is typically less than 0.200 MGD but that we have exceeded 0.232 a total of ten (10) times since 1981. Please note that it is primaries a storm water discharge and, as such, we have no control over its flow rate. Accordingly, we propose that all flow limitations be removed from this discharge. I f1iJ c✓ay f� PAGE 2 COMFITS ON PROPOSED NPDES PERMIT NO. IVCO004308 - EXISTING PARAMETERS Discharge 003 La400n 1. Flow A. Measurement Frequengy i We have been reporting weekly under our old permit. You have proposed dai_1y reporting. If you will refer to Attachment #3 (copies of our flow charts for the last six (6) months of 1986), you will note that the flow is very consistent except during rainy periods. It appears to us that weekly reporting is ve representative of the lagoons daily performance. Also ease consider that daily reporting would result in an tional 58 entries (flow and time) on our MR-1 each We cannot see any merit to increasing our reporting frequency. Accordingly, we propose to continue to report Discharge 003 for flow on a weekly `s „�S1 basis. B. Discharge Limit Our average daily flow limit is 0.181 MGD under our old permit. You have proposed that it be -reduced to 0.076 MGD. Please note that 0.076 MGD is the average of our monthly averages for 1984 June through 1985 May as reported in our application. As you can see on Attachment #4, flow for that period was unusually low. The average of our monthly averages for 1981-1985 is 0.109. We have exceeded our present limit of 0.181 MGD five (5) times in the last four (4) years. In almost every occasion, heavy rainfall of one inch or more over the lagoon caused this flow excursion. With a total watershed of approximately 1.75 acres at our lagoon, one (1) inch of rain in 24 hours will result in an average daily flow of 0.048 MGD all by itself. This is 63% of the proposed flow limit! We have no control of this flow. Also, please note that the present and proposed parameters for this discharge all have mass limitations - not concentration. We propose that our daily average flow limit remain unchanged at 0.181 MGD. E PAGE 3 COMMENTS ON PROPOSED NPDES PERMIT NO. NCO004308 - EXISTING PARAMETERS Discharqe 004 - Storm Drain and Non -Contact Cooling of.Air Compressors 1. Temperature A. Measurement F'i^equeruy r We have been monitoring this discharge monthly under our h 1 permit. You have proposed that we monitor this discharge a If you will refer to Attachment #5, you will'see that discharge temperature closely follows the ambient air t ture and is very consistent from year-to-year. In our opinion, this temperature is seasonal and predictable. We can see no merit in increasing our measurement frequency of this discharge. Accordingly, we propose to monitor Discharge 004 for temperature on a monthly basis. 2. Flaw A. Measurement Frequency We have been monitoring this discharge week You have proposed that we continue to monitor weekly. P1 a refer to Attachment #6, and you will see that it is faily consistent and predictable. It goes up during the wet season and down during the dry season. Generally these trends extend over months, not weeks. We can see no merit in continuing weekly monitoring. Accordingly, we propose to monitor Discharge 004 for flow on a monthly basis. A. Measurement Frequency ef gpe;r=. e been monitoring this discharge monthly under our old You have proposed that we monitor this discharge . If you will refer to Attachment #7, you will see that typically ranges between 7.0 and 8.0 and is very tent. This discharge is primarily non -contact cooling water with no water treatment. Accordingly, we propose to monitor Discharge 004 for pH on a monthly basis. PAGE 4 CONTENTS ON PROPOSED NPDES PERMIT NO. NCO004308 - EXISTING PARAMMRS Disci005 - Storm Drain 1. Flow A. Measurement Frequency We have been monitoring this discharge weekly under our old permit. You have proposed that we continue to monitor it weekly. If you will refer to Attachment #8, you will see that the flow typically ranges between 0.025 and 0.175 MM and is very consistent and predictable. We can see no merit in continuing weekly monitoring. Accordingly, we propose to monitor Discharge 005 for flow on a monthly basis. 2. pH A. Measurement Frequency We have been monitoring this discharge months under our old permit. You have proposed that we monitor weeklV. Please refer to Attachment #9, and you will note that the pH typically ranges from 7.0 to 8.0. Since this is a storm drain, we can see no merit in weekly monitoring. Accordingly, we propose to continue to monitor Discharge 005 for pH on a monthly basis. COMMENTS ON PROPOSED NPDES PERMIT NO. NC0004308 - EXISTING PARAMETERS Discharge 006, 007_�and 008 - Non Contact Cooling of Generator Housing (Air -to -Water Heat E harrger) - 1. T erature A. Measurement FY'eguen_� We have been monitoring this discharge monthly under our old permit. You have proposed that we monitor it weekly. If you will refer to Attachment #10, 11, 12, you will note that the discharge temperature closely follows the ambient air temperature and is very consistent from year-to-year. In our opinion, this temperature is seasonal and predictable. Please note that the combined flow of all three (3) discharges (2.0 MGD) is an insignificant 1/300 of the river flow (6000 MGD) and that the temperature rise through these heat exchangers is only approximately 30C. This would result in a 0.0010C rise in the Yadkin River's ambient water temperature. Accordingly, we propose that monitoring Discharges 006, 007, and 008 for temperature be stopped altogether. B. Sampling Locations We have been monitoring this discharge at the effluent only under our present permit. You have proposed that we monitor our effluent as well as upstream and downstream. Please note that access to the top and base of the dams is both time consuming and dangerous. In all cases, access to the base will require three separate boat launchings and boat trips of several miles. We estimate that it would require one person an entire day just to access the sites of our dams one time and would require us to purchase a motor boat and a vehicle to tow it. Considering the source of the discharge, the above information and our comments in I.A. above, we can see no merit in this monitoring. Accordingly, we propose that monitoring Discharge 006, 007 & 008 for temperature be stopped altogether. 2. pH A. Measurement Frequency We have been monitoring this discharge monthly under our old permit. You have proposed that we monitor it weekly. If you will refer to Attachment #13, 14 & 15, you will see that the pH ranges between 6.3 and 7.1 and is very consistent and predictable. We do nothing to these discharges to alter their pH in any way since the water merely passes through a air -to -water heat exchanger. We can see no merit in this monitoring. Accordingly, we propose that monitoring Discharges 006, 007, and 008 for pH be stopped altogether. FV T-j CM U-1 ��f� "'u y��l►yk��7►T�il� ti�.y :ls �I�� :M. ' :lieu a�� ► f �.� • : 7►;i��'111�yi:��;`�1:�u��M��A� Discharge 006, 007, and 008 - Non Contact Cooling of Generator Housing Air -to -meter Heat H�changer) - Continued 3. Flow A. Measurement Frequency We have been monitoring this discharge monthly under our old permit. You have proposed that we monitor it weekly. If you will refer to Attachments #16, 17, and 18, you will see that this flow does not change. The reason is quite simple - the system is pressurized by the lake head. We have a valve in the supply line that controls the flow rate through the air -to -water heat exchanger. Our cooling requirements are constant so this valve does not need periodic adjustments. The reported flow rate gives us optimum cooling. We can see no merit in this monitoring. Accordingly we propose that monitoring Discharges 006, 007 and 008 for flow be stopped altogether. PAGE 7 COMMENTS ON PROPOSED NPDES PERMIT NO. NC0004308 - EXISTING PARAMETERS Discha4e 009 - Storm Drain 1. Temperature A. Measurement -Frequency and Sample Location We have been monitoring our effluent monthly under our old permit. You have proposed that we monitor our effluent as well as upstream and downstream locations weekly. If you will refer to Attachment #19, you will see that our discharge temperature closely follows the ambient air temperature and is very consistent from year-to-year. with a river flow of 6000 MGD and a discharge flow of 0.5 MGD, a 2.8°C rise in the Yadkin River's ambient water temperature would require a water discharge temperature of 33,6000C! This is impossible. This water is not used for any cooling in our plant, and we cannot see any merit to this monitoring. Accordingly, we propose that monitoring of Discharge 009 for temperature be stopped altogether. 2. Flow A. Measurement FreM;tn� We have been monitoring this discharge weekly under our old permit. You have proposed that we continue to monitor it weekly. If you will refer to Attachment #20, you will see that our flow has typically ranged between 0.05 and 0.15 MGD and is very consistent and predictable. We can see no merit in continuing weekly monitoring. Accordingly, we propose to monitor Discharge 009 for flow on a monthly basis. 3. pH A. Measurement Frequency We have been monitoring this discharge monthly under our old permit. You have proposed that we monitor this discharge weekly. If you will refer to Attachment #21, you will see that our pH has typically ranged from 7.0 to 8.0 for the last three (3) years. We cannot see any merit to increasing our monitoring. Accordingly, we propose to monitor Discharge 009 for pH on a monthly basis. ATTACHMENT NO. 1 - NPDES PERMIT NO. NCO004308-COMMENTS T E M p c 40 30 20 0 ++ ♦ ♦ ♦ + ♦ + ♦ ♦ + ....... ........{............i........................ ............... {............._.... �..........._.............. + + + + ♦ + .... ................ +:...+................. ....................................................................... ........................ .................................................... +.................. ......._...._.......... I-JE N I-JAN I-5.J1 N 1991 1992 1983 BADiN 1-JAN 1994 0utta11 i-VAN I-JAN 1995 1986 uvct I-JAN 1997 F L 0 w m d . 500 ATTACHMENT NO. 2 - NPDES PERMIT NO. NCO004308-COMMENTS PRE SENT LIM %T + + + 30=PROPOSE0 OWT + + + + + + + -t+ ++ +++ + T �` ++ + + + + + + + + �; + + + + +. 7:F4 7,�, 1, + + * +: + + I-JAN i-JAN I-JAN I-JAN 188l 1882 1883 1884 BAD i N Out f a 1 i 1-JAN 1985 vvco i -,JAN V986 I-JAN 1987 01 it ti ti �� I ovapawliII MEMO I sz� SUNDAY S 10 NOON 2 6 4 6 0 9 FLOW TEMP. TEMP. voE55. FUR si AIN FLOW pnf35 b > 1?2- 19 10' W BM 47193 lu 0 0 9 '�� I'= z =z 1 0 t —wa E 1 . 1 • • /fs�ryr� M=lWE _ �f / f � NrA_ FLOW iLOW iLOW TEMP- •`•� , `` � 1 11`•' 1 } / 'Y /1J- /:nr� PRE55. TEMP,- PRE55, PRE55- •O1� l - 1 ` 1 4 4 }(} ,} }- �� AIR FEOW - �' all 3 i i 10' i w1 �} 1 � 1,1� =`;i � �'� • '�� „ ` \ \ � �v �� /11 1 1 ;'/ / r1I 1 � .7 ! F BM 47193 � \, � ,• '.`•�\\ \.��\t ��\�` `\•�� •� �"}- �`.--T�-..-i N_ yam" ._ S, !_/r,� Ji��/' � � �+'�•f./ 1 / O �i CP jok 9�b�Z�L 1=01 13 -SUNDAY NOON 2 4 0 Aosw— 6 Nk TOWN No 'LAW go L .IP �Ip 01 0 We 111h /LOW FLOW7FLOW iFMP. �' •' •J'• r.�. /gE3i, _TEMR:jj PRf 55, _PRESS_ "�.L;'j Y. Nr M1E55, TEMf�1 TE_Y_P, _TE_MP._ f Rfir 111 R F l O W RRf 55 1 s=r. 5�1. y SM 47193 UP A V, Ck '19 Cl 01 99z: O 0 0 IV, iv T -n P" % SUNDAY 10 NOON 2 kg 9 8. b 7. TEMP, _PRESS. I�Lllw S i. -TEMP: TiMP -ii l �J L"w 02' ✓tIR�W' PRESS. IV- -ig BM 47193 co !'�ws,, � ^-� r �.� � �, •1 _ 2 1. y .-s -i r ) yfJL �V�•�'YV bis �` �'t�✓ j.< M ,� � ., _ ,, .. �,:. RtJ �,,V rY 'e- G t�"R.+.� }: q!'i : SUNDRYrs Er' 10 NOON 2 ?' 6 4 6 }k 8 7 OP 7. Jam; y1 X `h. ! f-. I / ' , r �: ill. it/.' �'yff L�j "'7,. 1 �\, � `��1 ,1 ^ "11.1.\�' "i 1�'1�• � �� - �� Z { r / IP.J FLOW ROW FLOW -All f• f1 "t- r _f ��,/! _r` ', i PRESS I TEM�PRC55 ! I j f f1 jf//1JJt) _ l f1 it f' , PRE55- TE M_P.� 1C P_ TEi1 P,- ,. S•5 1- -� l 1 1 1'I 1 11 1� f Jr Hl�i RIR ELOW PRESS.y1 ]f . � ,llll ti41_A l I}S.: y l I T1}. �a-6P�G� �'1 a, � eel }1 1- � � �" .; �� s� ;�1 ��t•i ff �- � ''?t r�I( 7 •0 2� ', 11�� •• t `�.�� '�� '4� � BM 47193 �; '-� i�'.;�' %�>!� f .� I ,' r,{i �•�f' Oy f'. r �� 1, `\� '\'i \L•7�`i\\ t'�' 1\ .1 �� f ,ti` — rt1'-:~• "/`2+ ��•f �'%�,c�/j!! /'�'`/'� j'' �f ��% � .. •'` ` \ _\` ;� `� ,fir L "•� i / / .%.! /f/ . till ol y! 8 9bL-10189 V 'Adp �. `L m Go k I AMEAM. V-0 swam OR am OR P 20 rI Flo 4,WY71I w-almaiI OR No No OR Ov pa INS;- IN ro Xd FLOW TEMP. Gl— PRESS. TEMP. PRE55, ftf., A7 ;m PRESS 6� E 1-1-3 C, / BM 47193 m� z ;`�,� `kV ------ - -- ..... 4p > 0 00 t 1, -law @whim z 01 0 ff S. -All qp tm -Ct t—o WvT FL RESS mp. PRO TEMP, tow t"w P ir H co BM 471 3 Om ocn Aj 00 0 1 00 to as :=z - z I o I 144, iW -All �i '' y, iC, •y,r;:ejli �y �T 7 Ss "a x ! - - / L 5.e. r 4 ''• *c,( fe;'`q -. R� }'.\ L _ �jhi s�fF°. rti�-�,twt'.y � ,r�r Y Y�• '"_ ` _ ..- �. — - 7> {t 'ay. 'tD'�H`�,Yl• .:ems :i[.t (Yc :��.+ t� .i.t , \ ' 1. - - � t Yh _�� .. . ;�r' e�(• _ �- '[b �. \f,�r �+{,tom. ' s. + ,,• P3j1�yr `{� '. At'}rS'= : a SUNOAY i ti n Yz�r m, g 10 NOON 2 +04 �f A jl P ..f1j7311 m O 2a om a A,'V 1 OON �rk tN ...... . . .. 200- 4 To sb DA Y IYO sow o1w 9 - -L 0 X A 0 2 �X'MON _ . -.\\ -\\\ 1 -yy 1`�1�,�� t . fLow :A BAI 47193 Q t} �;� \ � \ �� \` � �(C �. �,'4�� ^ r.ti ; . _ l • �J : %- f F�/ � ;!/� fi `� J f� � b .......... Cb o/ q 9 `LPL j P ootA -41,1, f 11 0 f 8 9 tF sa On wjm�-.Wl AMM- V--- a-V wom P gmlooRodo P- ; 0. NO W-0 W- w 01-olow-RO-OR mmmml io-5061-6000-OR WE , W'so wnm-oow- Fo- MR W W- nwo no OOW,O W- w & wmws mo ma ail a- l It v SDAY NOON x �r,{ �• � ?t.�4� 61rr � � •. _��,��7,/ 1i0��lLCyT ;' ••'� ,y;•• .ham "''r':�i':i 3 ' -:----�yr 4�rb�L`LiOt.~ 01. iF goo— Him f/IIop ow — 00— -- �--�AWAWFAW — -- IM v --MAW WSW to Fo- W-0- Wk r =T 1=0 x: f 1 ��l!II1 rr<a��4 IMPM Onion to m FAMMAM IMP �b0oowoo L1-..-9 A I� P ca - r K i t- 4 1 � 1 • • WE Mom SIM olv / ROOM. swim CID ;o� aN _2 M ,c 1 MA, I H IMF aw Re NO V h►r� 9-OMM �T ;N'Y fcq, 1, a x i ! + . ' i •'K - _ y,��t f'i NDAY :.}o NOON 2 4 r } $ S � 8= l o Gyr 01 �.'appd0�t�' ,:-.. �.1 ��vC w� �t �f IR Y t. Tw•y �4+tF � i- r t , it � '�7` � �g..N��' }'f K 1 , + {" +F.L ;""� - N : �NF'etzyl� *!� ,i 111j� F. tlk ill^S:'I'Tl! ti .V y F j F H -�` .}y4%y _r T -k It SUNDAY " ' V ■: F .� 10 NOON 2 �6 8 5 �8� H� t `, y ai _ `rp`� cyr -,O 4jam cr Cb � R � �+r., QI'�'� •� �' 1.1 r , h � `•'h' \1 �N qp 'D�- xi� 1 .5., SUNDAY 10 NOON 2 :4 6 OF Ci b' Sines! 01 ti } A 4dF .4 7 VK 4.1 N, "K SUNDAY 10 NOON 2 A 5 0 _4% ...... Lo b .k' n F L 00 FLOWFLOW - Ut� PRC5 PRESS. MESS. � *1R FLOW mtss a A NoONpap,M ./ 9 9 rye Ml mpl. W-.50-�0.se- ROM �Wmftww 'o --Mmw=mw� � :��s � MEMO - PA Wool. MEMO slialaw oo-�i ;:� t,=Z=z t=0 car I wwmwmw�— -mum WE mwmw�Awm,.w 1 ow won so am Mal 12 0 0 z - 00 4 NO irds 0tv cylo) 01 a OL-0 0.3 0.28 0.26 0.24 0 0.22 0.2 L� a 0.18 0.16 Z 0.14 0 0.12 I 0.1 O -1 0.08 0.06 0.04 0.02 0 ATTACHMENT NO. 4 - NPDES PERMIT NO. NC0004308-COHLIMENTS ALCOA -- BADIN WORKS NPDES DISCHARGE #003-LAGOON-2/24 g- PR+<SENY LIn++r=o.l81 1� J PROPOSED LIMIT%0.0T6 j � l i JFM 1981 ONDJFM 1982 ONDJFM 1983 ONDJFM 1984 ONDJFM 1985 ONDJFM 1986 OND MONTH/YEAR 50 40 T E 30 z c t� V ATTACH€4ENT NO. 5 - NPQES PERMIT NO. NC0004308-COMMENTS --------- ........................... ......... ...................... ...................... ............ ....r... ......................... + .................. .. • ..... _...... n. i......... ..... .............. J..........r +� + + + ++ + + + + + .. ................. ....................... ..............--- = -... ...................... it 5 T I-JAN I--JAN I-JAN I-JAN i-JAN I -JAN i-VAN i9si 1982 1983 1984 1985 1936 1987 B A D I N 0 u t f a 1 1 0V4 F L Q w 500 m 9 d ATTACHMENT NO. 6 - NPQES PERMIT NO. NC0004308-COMMENTS I + ........... ..�,..t....... ................------ - .................----- - ....................._ _..........................,�,r........ t......... +4- * + + + ++ +,+.++++- +- + ++ 4++ + + +-++ + + + + +++ + � + + + + + ++ -H+ +++ + + 4F + + + ++ + + ++ ++ :q4l + + + + + + + - # +�-+ + + + + + v i-JAN 1981 i-JAN I-JAN I-JAN i-JAN i-JAN i-JHN 1882 1983 1884 1885 1886 1987 BAD I N 0ut f a I 1 004 ATTACHMENT NO. 7 - NPDES PERMIT NO. NC0004308-COMMENTS p h t� 0 E ........................ ......................... :....... ...................... ....... .........._.........._.._ ++ + +++ f + +++++ ++++++ + + ++ ++ : + +++ + + - ++ + + ++ + + + + + + +++ + �' ++ + + ++ + +: + + + .. : ....................... ..............................--••----.._.......:........................ i................ ............. I ...................................................................... ...t---........-•-.........- ....................... ...................... 0 L_ I-JAN 1981 i--%JAN 1-JAN I-JAN i--JAN i 1 r. w02 1983 1984 1995 BADIN Qutfat I 004 I -,JAN I -JAN 1996 1987 F L 0 w m 5 d .500 ATTACHMENT NO. 8 - NPDES PERMIT NO. NCO004308-COMMENTS T + + + +H+F + + +F +F+ + +r , _L -f ++ + JL J. .L L J_ r + v 1-JAN 1-JAN I-JAN 1881 1882 1883 BAnIN i-JAN I-JAN 1884 1885 0 u t f a I I vv!3 .115 oz5 I-JAN I-JAN 1886 1887 F h 9 10 ATTACHMENT NO. 9 - NPDES PERMIT NO. NCO004308-COMMENTS ................................................. ....................-- - ...................-- ---................... ...k.......... ......... ................................................ ........•-----.......... :........................ f.._..................... i........................ � ................................................................................................. {........................ {......................... V 1--JAN 1981 0 M. I--JAN I-JAN 1882 1883 BABIN I--JAN 1884 0ut f a I--JAN 1885 I 005 I-JAN I-JAN 1986 1887 T E M p 40 30 20 10 raw ATTACHMENT NO. 10 - NPDES PERMIT NO. NCO004303-COMMENTS + + ++ ...... {+...........j.......... -...... ............... ...........{......................-;--........_........----.1....................... ++ + + + ++ ...................... ...................+. ....................._ _ ._.................--- - ....................-..................... ...................... ......................... ........................ ....................... ...._._.......------ 2-JAN 1-JAN I-JAN I-JAN I-JAN 1-JAN '19181 i582 1983 1994 1985 1986 BABIN 0utf a 1 0016 1-JAN 1957 T E m p c 40 34 20 itt] ATTACHMENT NO. 11 - NPDES PERMIT N0. NC0004308-COl3i1ENTS + + + ++ + .......... ..... ...{.,.-.... r}............{........................{.......... ........................4............ {......................... + + + ............................................ ...+................. .._ + + + + + + . .................. �..................... ---------------------- _----..............---. ...................... ......,............... ... 0 1-JAN 1981 i-JAN i-JAN 1982 1983 BAD I N 1-JAN 1984 0utt a I-JAN 1985 1-JAN i-JAN 1986 1987 T E M P c o 20 10 ATTACHMENT NO. 12 - NPDES PERMIT NO. NCO004308-COMMENTS + + ♦+' {+ ................ -.................... ---............... ..........------------._r........................ ................... t + ...................... ................................................. ..........------...... ..................... ...................f..- s+ *• +'+ ..................... .�:........................ _..................................................+...----............. .................... 0 1—JAN 1881 1—JAN 1—JAN 1—JAN 1—JAN 1982 1883 1884 1885 7% �d.y E% T ► I II rN f' tT }n 7 1 n n b� I,I l ll1 U u tr i a 1 1 v u 1—JAN I—JAN 1886 1987 0 h 6 8 A PA �o 5 3 I Vol ATTACHMENT NO. 13 - NPDES PERMIT NO. NCO004308-COMMENTS ,�...............+ +_. ..-_---....+..{.......... ...._.+.., ................+.,,,, ,. ,�t ....+......_ ................... + + + + ++ + + +�.++++ +++ + : + + + + + +++; +++ +F ++ + + + + ........................................................................ {........................ i........................ ......................... 1—JAN 1—JAN 1881 1882 1—JAN 1883 B A D I N 1-JAN 1884 0 u t f a I I I—JAN 1—JAN 1885 1 �+86 0GG' 1—JAN 1 °+8 7 h 6 G M C 5 4 K ATTACHMENT NO. 14 - NPDES PERMIT NO. NCO004303-COM;IENTS +++ + +�+ . ........................ {..................... ._.................................................. {..........------........ti ................ ........ JAN I-JAN i-JAN I-JAN I-JAN 1981 B A D I N 0utfal1 007 mml 1996 I-JAN 1987 r it 6 9 In 6 2 I ATTACHMENT NO. 15 - NPDES PERMIT NO. NC0004308-COMHENTS ............. ' ....................... I ........ .......i •. { • + ' ............. +++ ++++ ++ ++� + + .......................1........................ 1................................................. ti.........r.............. .......................... I-JAN 1-JAN 1-JAN 1-JAN I-JAN I-JAN i 9s i 1982 1983 1984 1985 1986 BADIN Outfai i 008 1-JAN 1987 i F L a w 500 m 5 d 0 1-JAN 1981 i-JAN I-JAN i-JAN I-JAN 1882 1883 1884 1995 BADIN Gutf a i i 006 ATTACHMENT NO. 16 - NPDES PERMIT NO. NCO004308-COMMENTS I-JAN I-JAN 1886 1887 F L 1.50 0 rt� 5 d .500 ATTACHMENT NO. 17 - NPDES 0 PERMIT NO. NC0004308-COMMENTS i I I � 111111111112 ++4- 4+ +++++++ +++++ * ++++ ++++ - +�+++ + + ++ +- + ++ +++ +++ � i ....................... {.....,.....,............. ......... ,.............. ti........................ {........................ 1......................... v I-JAN i98i I-JAN I-JAN I-JAN I-JAN 1882 1883 1984 1885 B A D I N 0 u t f a 1 1 07 1-JAN 1-JAN 1986 1987 H F L 0 w .500 m 5 d ATTACHMENT NO. 13 - NPDES PERMIT NO. NCO004308-COMMENTS H+� + +#?+++ +++++ +4+ ++ +4+ +++++ +++++ ++ ++++ .++++ ++++F f 1-JAN 1881 1-JAN 1-JAN 1-JAN i-JAN I-JAN 1982 1883 1884 1885 1886 BAD{ I N 0ut fa 1 1 uv8 1-JAN 1887 T E N p c 40 20 RO] ATTACHMENT NO. 19 - NPDES PERMIT NO. NC0004303-COPItIENTS + .......................{........................{........................{........................{.............* .. ...{......................... + ++ ++++ + +++ + +++ ...................+. ..................+. .................................................................. ...................... ........................ ....�......................++..................+_...+.................._..E........................ .................... ++ 4 I-JAN 1981 I-JAN 1-JAN I-JAN 2-JAN 1982 1983 1984 1985 B A D I N 0 u t f a 1 1 0ug I-JAN 1-JAN 1886 1887 ATTACHMENT NO. 20 - NPDES PERMIT NO. NCO004308-COMMENTS F L 0 w m 5 d .500 + + ++ +*F +: 4 1 1 1 IT W �H 4, +�F *+-FiW + + ++ +** + + �+ raw .IS ,U5 I-JAN I-JAN I-JAN I-JAN I-JAN I-JAN I-JAN 2 98 i 1982 1983 1984 1985 1996, 1997 B A D I N 0 u t f a i 1 009 ., I H v 0 8 R r ATTACHMENT NO. 21 - NPDES PERMIT NO. NC0004308-COWIENTS + + ♦ .............................. ♦} +++ + +, - ++ ♦ ♦+ + ♦ ++ ♦+ ♦�` t } t + ♦ + + ++ ....................... .............. 1....................... ....................... {........................ {........................ {........................ {........................ {........................ , : I--,JAN I-JAN 1981 1882 I-JAEY 1!JAN 1- JAI4 I-JA!Y 1883 1884 1885 1986 B A D I N 0utfa11 009 i-JAN 1887 4