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HomeMy WebLinkAboutNC0000396_Asheville Permit Questions Email 2004_20040216 Asheville permit questions - NC0000396 200 / ed: gu of 717 4 Subject: RE: Asheville permit questions - NC0000396 From: "England, Louise" <louise.england@pgnmail.com> Date: Mon, 16 Feb 2004 14:10:41 -0500 To: "'Susan Wilson"' <susan.a.wilson@ncmail.net> I sent a request to Curtis to calculate the 1010. There is a$150 fee which Progress Energy will pay. I had him calculate the 1010 at the same location that you had requested the 7010. As soon as I get something back from Curtis I will let you know. Thanks, Louise Original Message From: Susan Wilson [mailto:susan.a.wilson@ncmail.net] Sent: Monday, February 16, 2004 1:47 PM To: England, Louise Subject: Re: Asheville permit questions- NC0000396 Louise, Let me speak with Dave about the 1Q10. Since it is supported by EPA TSD, I don't think it will be a problem - but it is different from the way we are doing business with other discharges. Tom B left me with the impression that 1Q10 is not easy for USGS to work up - that's why we haven't asked for it (but I think he may have been asking USGS if we could get some ratio between 7Q10 and 1Q10 so we wouldn't have to request 1Q10). But, that is good news if Curtis can get you 1Q10 - I'd go ahead and ask for it, doubt it will cost you much (you can see if he will tack it on to my original request or else pay for it on your own). We usually use the chronic value in conjunction with the acute value (using the chronic value as a weekly average and the acute value as a daily max), except in cases where the chronic value is higher than the acute value (which is the case here - and we would just apply the daily maximum, acute value). However, if you need a schedule to meet the acute value - it will carry more weight with EPA, in my opinion, if Progress can meet the chronic value (but that's just my opinion - seems easier to argue, if we need to argue that one). Susan England, Louise wrote: Thanks for the quick response. Sorry it has taken me so long to respond back. I reviewed the TSD concerning using 1010 and I spoke with Curtis Weaver of USGS today to see if he would be able to come up with a 1010 and he said that he could. If we do get a 1Q10 value from him would you then use this value in a calculation for permit limits? If so I can email him asking for him to work on this. I do feel that we will be able to meet the chronic value for selenium with treatment. Is there a possibility that we would get the chronic limit instead of the acute? Thanks, Louise Original Message From: Susan Wilson [mailto:susan.a.wilson@ncmail.net] 1 of 2 2/16/2004 5:33 PM RE: Asheville permit questions - NC0000396 Sent: Tuesday, February 10, 2004 6:02 PM To: England, Louise Subject: Re: Asheville permit questions- NC0000396 Louise - Yes, the selenium value of 56 ug/1 is an acute value. Our existing guidance does not allow for the benefit of dilution for acute values (and this is supported by the EPA Technical Support Document); since it is toxicity based on acute effects - no dilution is allowed, unlike with chronic, which is a 7 day exposure. I believe the TSD (and some states) use a 1Q10 value as a dilution for acute values - but we have spoken to USGS about this in the past and they do not keep records in terms of 1Q10. Since the selenium would be a new limit - I would hope that EPA would allow a schedule of compliance. Could Progress meet the chronic value? I think we discussed this with Sutton - the different forms of selenium (selenate/selenite) can differ in toxicity. If Progress can demonstrate which form may be more prevalent - there may be some lee-way there (although I would want to discuss this in more detail with Connie Brower, our standards person). Curtis (USGS) indicated he may have something back to me by next week re. flows. I'll let you know. I'm still looking into the issue with the close-out of the coal pile runoff pond (Roxboro). Susan England, Louise wrote: Susan, After looking over the permit I have just a few questions at this time: I want to verify that the selenium limit of 56 ug/I is based on an acute criterion value. It appears that this limit for selenium does not take into consideration the dilution from the French Broad River. Is this correct? If the above question is correct why is dilution not taken into consideration? Will a schedule of compliance for selenium be allowed? We are not sure the ash pond alone will be able to meet this limit. Thanks for your time. Louise England 2 of 2 2/16/2004 5:33 PM T.T -_- __ .. - 77 1/2,1701 P41'92'9551 1 ICI Ay — 94 i ji I 11111111 1— (5?9 q i �ooi&4G- ePi . wel aii kVA (-r hi, , , Ccui 5 c7– i I 1 74- � [ - 'Low 5 --94o 6 S--1r(e..-e UAGu c-5 �(N0 q. 8 Alp deopti.76, 1- //E/f1'7' i 1 I I I I _ II I I I I I I I I 41 ( rAivt ; A►feiz- 41 R&#2r - taP c OF (4-3414r) . French Broad River 1 2 3 4 5 6 7 8 9 10 9/9/2003 9/15/2003 9/23/2003 10/2/2003 10/7/2003 10/14/2003 10/23/2003 10/28/2003 11/6/2003 11/11/2003 . Mo <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 TDS <1 22 <20 24 52 50 20 <20 42 22 Chloride 2.4 3 3.7 2.3 2.3 2.9 2.8 2.3 1.7 2.2 Fluoride <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 <0.10 1.1 Sulfate <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5.0 <5 <5 Al 0.472 0.7 14.7 0.176 0.098 0.096 <0.050 0.316 6.33 0.091 Sb <0.003 <0.003 <0.003 <0.003 <0.003 <0.003 <0.003 <0.003 <0.003 <0.003 As <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Ba 0.011 0.014 0.066 0.011 0.012 0.013 0.013 0.018 0.046 0.012 Be <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Cd <0.001 <0.002 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 Cr <0.005 <0.005 0.008 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Cu <0.010 <0.002 0.008 <0.010 <0.002 <0.002 <0.002 <0.002 0.005 <0.002 Fe 0.352 0.48 6.68 0.212 0.092 0.085 0.098 0.213 2.88 0.12 Pb <0.005 0.005 0.01 <0.003 <0.003 <0.005 <0.005 <0.005 0.005 <0.003 Mn 0.024 0.035 0.2 0.022 0.019 0.022 0.019 0.032 0.167 0.025 Ni <0.010 <0.005 0.005 <0.010 <0.010 <0.005 <0.005 <0.005 <0.005 <0.005 Se <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Ag <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Zn 0.006 0.009 0.047 0.005 0.005 <0.005 <0.005 <0.005 0.027 <0.005 TI <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 B <0.010 0.012 0.04 <0.010 0.01 <0.010 0.011 0.032 0.024 0.012 Titanium 0.042 "AM- ( U T o u-r--L.A- co)) r Ash Pond 1 2 3 4 5 6 7 8 9 10 9/9/2003 9/15/2003 9/23/2003 10/2/2003 10/7/2003 10/14/2003 10/23/2003 10/28/2003 11/6/2003 11/11/2003 . Mo 0.13 0.12 0.14 0.13 0.14 0.12 0.1 0.12 0.11 0.1 TDS 220 230 250 250 260 180 240 210 180 220 Chloride 11 11 10 11 11 11 11 10 14 11 Fluoride 0.95 1.2 1.1 1.1 1.4 1.3 0.98 1.1 0.94 1.1 Sulfate 140 140 130 140 130 120 150 120 7.9 140 Al 0.053 • 0.451 0.267 0.22 0.182 0.21 0.192 0.256 0.292 0.215 Sb 0.02 0.02 0.019 0.018 0.021 0.021 0.022 0.021 0.014 0.019 As 0.021 0.031 0.028 0.028 0.036 0.022 0.028 0.038 0.028 0.024 Ba 0.1950.338 0.181 0.186 0.181 0.189 0.168 0.185 0.202 0.158 Be <0.002 , <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 <0.002 Cd <0.002 • <0.002 0.001 0.002 0.001 0.001 0.001 0.001 <0.001 <0.001 Cr <0.005 • <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Cu <0.010 0.004 0.003 <0.010 <0.002 0.002 <0.002 <0.002 0.004 0.003 Fe <0.010 0.081 0.028 0.035 <0.010 <0.010 <0.010 <0.010 0.043 <0.010 Pb <0.005 <0.005 <0.003 <0.003 <0.003 <0.005 <0.005 <0.005 <0.005 <0.005 Mn 0.269 0.467 0.092 0.199 0.15 0.149 0.204 0.197 0.09 0.16 Ni 0.019 0.022 0.019 0.019 0.018 0.021 0.022 0.019 0.018 0.024 (Se 0.054 0.051 0.047 0.047 0.063 0.059 0.049 0.056 0.041 0.045 Ag <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 <0.005 Zn 0.024 0.022 0.022 0.022 0.018 0.025 0.018 0.016 0.015 0.018 TI 0.004 0.003 0.003 0.003 0.002 0.002 0.002 0.002 0.001 0.001 B 0.41 0.38 0.425 0.42 0.46 0.46 0.4 0.41 0.38 0.4 i4.5( (1/12c(L) Mercury Date Ash Ash Pond Ash Pond French Broad French Broad French Broad Trip Field Blank Equipment Field Blank Comment - Pond Duplicate Average River River Duplicate River Average Blank Ash Pond Blank River _ 9/9/2003 3 2.98 2.99 2.9 2.5 2.7 0.348 0.564 NA 0.407 1 9/15/2003 5.28 5.48 5.38 3.5 3.3 3.4 0.443 0.32 0.207 0.396 1 9/23/2003 NA 5.42 5.42 37.7 48.3 43 0.356 0.436 0.322 0.491 1 10/2/2003 5.11 3.86 4.48 1.7 1.7 1.7 0.255 0.274 0.346 0.315 1 11.461 10/7/2003 4.22 4.2 - 4.21 2.14 NA 2.14 0.326 0.38 0.298 0.723 1 RA(N 10/14/2003 2.5 2.52 - 2.51 1.78 1.72 1.75 <0.103 <0.103 <0.103 NA 1 verr( 10/23/2003 3.12 2.5 2.81 1.23 1.21 1.22 0.071 0.097 0.52 0.148 2 10/28/2003 2.9 2.82 2.86 4.01 3.99 4 <1.0 <1.0 <1.0 <1.0 2 11/6/2003 4.08 3.78 3.93 15.1 16.2 15.6 <1.00 <1.00 <1.00 <1.00 2 11/11/2003 2.13 2.14 2.14 1.78 1.78 1.78 <1.0 <1.0 <1.0 <1.0 2 11/18/2003 NA NA NA 1.85 1.9 1.88 <1.0 NA NA <1.00 2 All data is ng/I Comment 1 Detection level =0.103 ng/I Reporting level =0.500 ng/I (1-AP' 1--) 2 Detection level =? ng/I Reporting level = 1.000 ng/I Cap°, #Z) DIVISION OF WATER QUALITY NPDES Unit January 28, 2004 MEMORANDUM TO: Curtis Weaver FROM: Susan A. Wilson hk4-/ SUBJECT: Request for stream flows Attached is a request form and map for stream flows for the French Broad River in the French Broad River Basin. The requested site is near Lake Julian and the Progress Energy Power plant, south of Long Shoals Road (which appears to be Hwy. 280 on the quad map, but is listed as Hwy 146 on the DeLorme gazetteer). The site is highlighted in yellow on the attached map. The needed information is the drainage area, average flow, summer and winter 7Q10 flows, and the 30Q2 flow. Please provide this information at your earliest convenience. I can be contacted at 919-733-5083 ext 510 if there are any questions. Thank you very much for your assistance. • TENNESSEE VALLEY AUTHORITY MAPPING SERVICES BRANCH 7 5 1 358 4,155 1/SE 359 ASHEVILLE 7.2 7141. 1 INTERSTATE 40� IASHfVILL!, 0000 „VAI _ :--- - f9?-�- , k 2.4 Mf. 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N4 ___:::: , ic / . , (-:7),.. . .___.,- _:-1,,,, '.- --_ ..if\r--. 0 If \,; ,.......er --4"4" ' -1.**31 **1---,-;- ,,;,:11 or sii: , i, : ,, 1. . ..40........, ..,rii. , ,, prillemille 11Fr IIAL , ., :-...Zoi %:,- a \..... .2_ _, ir . . \%, , ,.\,, rci ,rj \\,„ 1:\ c#..........„1 „..... ..), <7 ,...0.,, :.,:c. 1,. ., i,...,,,, \ . , . 14- , :,\ ...,.„. ;.,;.-. 111 _ _ GLEN � (•�� � �� 1, NMs �� ,L'_L ' )\ I a, tI W'1\ \'\�;ft}� /• I I•I. i11 ,n} tri Date_1/28/2004 USGS Flow Data Request Requested by Susan A.Wilson DENR/DWQ/NPDES Unit 919—733-5083 ext.510 Site No. 1 County_Buncombe River Basin French Broad NRCD Sub Basin_040302_ Map No.or Name_Skyland,NC (FSNE—DWQ No.)_ Station No. Secondary or Primary Rd Stream Name French Broad River Data Requested: Drainage Area_X Average Flow_X Summer 7Q10_ X_ Winter 7Q10 _X 30Q2 _X Site near Hwy 146(but on quad map it appears to be near Long Shoals Rd(280?)) (It's near the power plant and Lake Julian) Site No. 2 County River Basin _ NRCD Sub Basin Map No.or Name Station No. Secondary or Primary Rd Stream Name Data Requested: Drainage Area Average Flow Summer 7Q10 Winter 7Q10 30Q2 Low-flow characteristics for French Broad near Skyland Subject: Low-flow characteristics for French Broad near Skyland From: "John C Weaver" <jcweaver@usgs.gov> Date: Wed, 14 Jan 2004 12:03:28 -0500 To: Susan Wilson <susan.a.wilson@ncmail.net> CC: "John C Weaver" <jcweaver@usgs.gov> Susan, In response to your inquiry, a check of the low-flow files indicates the following: (1)The most "recent" set of estimates nearest your location is for Sta. 0344783455, approximately 0.6 mile upstream from bridge at NC 280 and below Powells Creek, having a drainage area of approximately 660 sqmi. Computed in 1972, the 7Q10 was estimated to be 360 cfs (0.544 cfsm) and was based on a discontinued gaging station operated 1934-87, Sta. 03448000, French Broad River at Bent Creek, drainage area 676 sqmi. The average discharge for period of record at the discontinued gage was 1,690 (or 2.5 cfsm). #'4‘, 0 4 N57FRonA I 1/23 (2) At e current downstream gaging station, Sta. 03451500, French Broad • River at Asheville, having a drainage area of 945 sqmi, an updated 7Q 10 • discharge is 425 cfs (or 0.450 cfsm). This estimate is based on the period of record including the recent drought flows. Prior to the drought, estimates of the 7Q10 were about 450 cfs (0.48 cfsm). The average flow reported in the 2002 annual data report is 2,076 cfs (or 2.2 cfsm). Using the average yield at your location would suggest an average of 1,450 cfs as opposed to the 1,680 cfs you cited in your email.much a difference in . estimates suggests to me that flow characteristics at the Asheville gage may not be solely applicable to your location The next upstream gage with long-term record is located at Blantyre (Sta. 03443000, drainage area 296 sqmi). The most recent analysis on file for this station is based on record through the mid-1990's. The 7Q10 yield was estimated to be 0.69 cfsm. No updated value has been determined that includes the recent drought flows. Still, a decreasing trend in 7Q 10 yields appears to be occurring from upstream reaches to the downstream reaches. (3)There is now data at a gaging station - Sta. 03447687, French Broad River near Fletcher - that began operation in July 2001. The station has a drainage area of 640 sqmi and is located at Fanning Bridge Road next to the Z S le 5 DA-TA airport (upstream of your location). No low-flow analyses have been completed for this location. The standard low-flow analysis for a gaging �Ri4 >51,1,i station requires a minimum of 10 years of record. However, there are Com. W/Srv4 t AT- low-flow Tlow-flow techniques that can be applied to a short-term record to estimate estIJt► Le/fR.6n>, low-flow discharges based on the available record. The average flow reported in the 2002 annual data report is 923 cfs (or 1.4 cfgr.. However, the average is based on a short record during a drought period and thus should not be considered representative of a long-term average. Because I was not able to find a previous set of estimates that had the 7Q10 being 375 cfs, I can't really provide a specific confirmation of your 1 of 3 1/14/2004 3:45 PM Low-flow characteristics for French Broad near Skyland estimates. And in view of the apparent changes in low-flow yields along with regulation and diversions that affect the French Broad in this area, it's difficult to get a good handle on what an appropriate set of low-flow characteristics should be. The above consideration may justify trying to complete an analysis for the T-I,s (S h newer gage near the airport. However, in light of the above information _ geoi,smN t-F and absence of any other analyses, I would probably advocate a 7Q10 of 360 cfs (based on the discontinued gage at 676 sqmi) and an average flow of y�wNw6A q46 va 1,650 cfs (also based on the discontinued gage). J gccou►f-r APR- De240V4r If the analysis at the new gage becomes necessary, then I need about a month lead time to complete. Hope this information helps. DSS m` Thanks. 791°5 Pad)/ -fel►5 l 5 U 1tE1-y Curtis Weaver AcLuiP,Tf J. Curtis Weaver, Hydrologist, PE W(1)14 -5,0/45 R^1 U.S. Geological Survey 86 ,7 7, uSd 3916 Sunset Ridge Road t ScoNTOLkafl 5YP Raleigh, NC 27607 0,0h,;,;,. us A-Omhu c Telephone: (919) 571-4043 // Fax: (9.19) 571-4041 STir i of J (W 56 E-mail address --jcweaver@usgs.gov p4J2 oM5 Internet address -- http://nc.water.usgs.gov/ lc_ F 19105 = 360 c`5 IWC 1.48 a- .5°70 Qkti 4 ( o Susan Wilson IOC (Ar Q ,r.,y) - 0.3310 <susan.a.wilson@n To: jcweaver@usgs.gov cmail.net> cc: Subject: Stream flows for French Broad 01/13/2004 04:56 PM Curtis - 2 of 3 1/14/2004 3:45 PM Low-flow characteristics for French Broad near Skyland I'll leave you a voice mail also - but I was wondering if you could (somewhat quickly) provide me with updated streamflows for the French Broad River. It is in Buncombe Co. approximately where Hwy. 146 crosses the French Broad near Skyland (and near Lake Julian and the power plant). I have a drainage area of 655 square miles. The previous flows indicate a 7Q 1 Os of 375 cfs and an average flow of 1680 cfs. I'd just like to get an idea if these are still pretty close to being accurate. Thanks much. Susan 3 of 3 1/14/2004 3:45 PM RE: Asheville Subject: RE: Asheville From: "England, Louise" <louise.england@pgnmail.com> Date: Fri, 23 Jan 2004 09:34:08 -0500 To: "'Susan Wilson'" <susan.a.wilson@ncmail.net> I'm sorry to hear you were sick. Unfortunately it takes a while to get over it completely. Can one year of drought change a 7Q10 that dramatically? How about meeting on Monday at around 2:00 or Wednesday at around 1:00? Let me know if either of those days will do or if the time needs to be changed. Thanks, Louise England Original Message From: Susan Wilson [mailto:susan.a.wilson@ncmail.net] Sent: Thursday, January 22, 2004 11:56 AM To: England, Louise Subject: Re: Asheville Louise, I'm so sorry - I finally got the illness this week. I'm back in the office today (Thursday). I need to meet with Dave before I schedule our meeting (since I was not able to meet with him on Tuesday). We have some EPA folks in and I'm not sure I'll be able to speak with him today. Do you want to try and schedule something for next week? Yes, we'll discuss the 7Q lOs flow. That flow accounts for the recent drought year, whereas the other one did not. It essentially changed your IWC from 1.4% to 1.8%. England, Louise wrote: I'm trying to get the volume information for you. I am surprised by the 7Q10 flow of 295 cfs. That is considerably less than the flow in the fact sheet for the current permit. Are you available on Wednesday or Thursday of this week to meet? I need to talk with Ben White to see if he will be able to meet this week before I can schedule. I will call you tomorrow morning to set up a time. Thanks, Louise Original Message From: Susan WilsonImailto:susan.a.wilson@ncmail.net] Sent: Wednesday, January 14, 2004 7:46 PM To: England, Louise Subject: Asheville Louise, Do you think you or one of your folks could give an effective volume (i.e. the volume excluding the amount taken up by existing ash) on the ash pond? That would help in determining the dilution it could provide. 1 of 2 1/23/2004 9:47 AM RE: Asheville • Curtis Weaver with USGS sent me something back this afternoon. I'll discuss the flows with you next week, but likely I'll use a 7Q1 Os flow of 295 cfs. I pulled the past 3 years of flow data. Looks like Tom's estimate of 3.5 MGD was pretty accurate. The 95th percentile value indicated 3.47 MGD. I may have to cancel the Asheville trip and Just meet with you here. I had forgotten I had scheduled another meeting for Friday, 1/23 (and I'm not too inclined to drive up and back in the same day). It's not critical that I go up there (although I would have liked to and maybe I can do it some later time). We can try and conference call Larry in on the meeting - I just want to make sure I keep him informed of any concerns. We can work it out so that you can make your Roxboro meeting if you'd like. Sorry about that. 2 of 2 1/23/2004 9:47 AM • e071 we o N' P6_ Lfriesi> gitel ------ ---- We (CP)Cti 5` trj"A")"D 9),‘ 7 _Goq P_derhYAI um 17`$ iors.i , f( 4 J ) & 4 -1-:_hie,t( ..�i eifAlerik - r -4 _ PDD FPL Ai t T 4 5 : . Alt Crc.. r } 4115icr N� se No. t„. . G,. rc-yr • (pAcy4711 ity) r 6E pJC4_1 NE Ma�+r tet rola- AI 09 /1i© frei-k-y el M45 r^I wz? Cil wA-1-y 5/1...Je2. ---, r Cis a, G4,j r �b y at; orl. imap://vanessa.manuel%40dwq.denr.ncmail.net@cros.ncmail.net:143/... Subject: CP&L Asheville NC0000396 From: Susan Wilson <susan.a.wilson@ncmail.net> Date: Thu, 15 Jan 2004 10:25:51 -0500 To: Vanessa Manuel <Vanessa.Manuel@ncmail.net> Vanessa, When you get an opportunity - could you tell me if these guys have had any compliance issues (have they popped up for NOVs/enforcement or have they been on QNCR in the ammomennimo . Likely - they haven't had any problems, but I just wanted to check. Thanks. j .��,�,.� ce 5/6 cam^- � is W 'J 1 /6)✓ • 1 143V 2003 - L✓" oig 1 &at. -/9 9 9 600 9 ll 7perJ 40. 3s. P 1iveiL • 7-t 14s Are.-1. peu. ogcie LAs-f- 3 rs• I of 1 1/15/2004 10:39 AM 1111.01.11111111111111.11 http://www.epa.gov/cgi-bin/getIcReport.cgi?tool=otis5&IDNumher... CWA NC0000396 COMPLIANCE SAMPLING State 06/26/2000 CWANC0000396 COMPLIANCE BIOMONITORING State 08/23/2000 ' CWA NC0000396 COMPLIANCE SAMPLING State 06/13/2001 CWA NC0000396 COMPLIANCE EVAL(NON-SAMPLING) State 11/07/2002 RCRA NCD000830638 OTHER EVALUATION State12/11/2001 1 Entries in italics are not considered inspections in Reporting for Enforcement and Compliance Assurance Priorities(RECAP) official counts. Compliance Summary Data 4144A__1_,..2,)* . �, % _,.. E . Statute 3 Source ID Current SNC/HPV? Current As Of i Description Qtrs in NC(of 8) CM 3702100628 NO 12/13/2003 CWA NC0000396 NO Jul-Sep03 , 1 RCRA NCD000830638 NO 12/09/2003 0 Two Year Compliance Status by Quarter Violations shown in a given quarter do not necessarily span the entire 3 months. AIR Compliance Status Statute:Source ID . QTR1 ‘16-TR-2 QTR3 QTR4 QTR5 QTR6 QTR7 QTR8 CAA:3702100628 . Jan-Mar02 Apr-Jun02 Jul-Sep02 Oct-Dec02 Jan-Mar03 Apr-Jun03 Jul-Sep03 Oct-Dec03 HPV History Program/Pollutant in Current Violation :TITLE V PERMITS 'C-PROCEDC-PROCED C-SOURCE_C-SOURCE C-SOURCE C-SOURCE;C-SOURCE -SOURCE SIP ' •C-SOURCE'C-SOURCE C-SOURCE C-SOURCE C-SOURCE C-SOURCE C-SOURCE C-SOURCE ' •NSR C-INSP C-INSP .C-INSP C-INSP C-INSP C-INSP C-INSP C-INSP NSPS , C-INSP C-INSP C-INSP C-INSP C-INSP C-INSP 'C-INSP High Priority Violator(HPV)History section: "Unaddr"means the facility has not yet been addressed with a formal enforcement action. "Addrs"means the facility has been addressed with a formal enforcement action,but its violations have not been resolved. Lead Agency designated can be US EPA,State, Both,or No Lead Determined. If HPV History is blank, then the facility was not a High Priority Violator. C=Compliance;V=Violation;S=Compliance Schedule. CWA/NPDES Compliance Status Statute:Source ID QTR1 QTR2 QTR3 QTR4 QTR5 QTR6 QTR7 QTR8 CWA:NC0000396 Oct-Dec01 Jan-Mar02vApr-Jun02 Jul-Sep02]Oct-Dec02 Jan-Mar03 Apr-Jun03 OP-ep03. Non-compliance in No No No No ;No No No Yes Quarter kitfrtli t.. SNC/RNC Status » 1C(manual).C(manual) C(manual)'C(manual): Effluent Violations by NPDES Parameter: Discharge point:002 CHLORINE,TOTAL NMth 295'/0 RESIDUAL Effluent violations are displayed as highest percentage by which the permit limit was exceeded for the quarter. Bold, largeprint indicates Significant Non-compliance(SNC)effluent violations.Shaded boxes indicate unresolved SNC violations. Informal Enforcement/Notices of Violation - AFS, PCS, RCRAInfo (05 year history) 1 Statute I Source ID Type of Action 1 Lead Agency 1 Date 1 1 2 of 5 1/15/2004 1:29 PM • MONITORING REPORT(MR)VIOLATIONS for Report Date: 01/15/04 Page: 1 of 1 • category!' ACtiOry • • r PERMIT: NC0000396 FACILITY: CP84L-A Progress Energy Company-Asheville Steam COUNTY: Buncombe REGION: Asheville Electric Power Plant Limit Violation MONITORING OUTFALL VIOLATION UNIT OF CALCULATED REPORT /PPI LOCATION PARAMETER DATE FREQUENCY MEASURE LIMIT VALUE VIOLATION TYPE VIOLATION ACTION 07 - 2003 002 Effluent Chlorine,Total Residual 07/10/03 See Permit ug/I 200 790 Daily Maximum Exceeded Proceed to NOV o! .1°63 Permit Enforcement History Permit: NC0000396 Facility: Asheville Steam Electric Power Plant Owner: CP&L-A Progress Energy Company Region: Asheville County: Buncombe Penalty Remission Enforcement Collection Has Assessment Penalty Enforcement Request Conference EMC Hearing Memo Sent Payment Case Number Approved Amount Costs Damages Received Held Held to AGO Total Paid Balance Due Plan Case Closed CV-1999-0009 04/28/00 $4,000.00 $207.78 $4,207.78 .00 No 05/25/00 Total Cases: 1 $4,000.00 $207.78 4,207.78 $.00 Total Penalties: $4,207.78 $4,207.78 1,pkr '' M&t u.-: — rI C000O 396 CD Me'D --- I bl `570 3 Lim f-ate PIA411- JulJ2j. % ,oro f' �7 ( 2/(2-(03 I( wer_2(...;__ ,...7 i /7(01„ (wavr Prsii,w''7 /'.5...1 r7s MAS •Jkbr Le/ e:g- 4 i-7,4-e-7— 7--', 74-j D asv c M COIL- DU l 1°f'5/°3 - 1,'lr-• j Ftc1ti c 5 716 ..F ,(ILa2(T1 ioto -p) 5,/Sriy 7, • As►rI hLLE lz-5i J T}( lei2rk r r G�+�ra+\.► ---', q- �, c. 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COW--o a� 41,1 ass ci(wa-c 0C-5 —4 MC 15 5"- / � w cr s t( s77477'��U s .r- Jusc:.lz,rrnoN 7 wAt-r rs A2..PG6eD u.�t��L N/ 5l F. (W P5 PMIS )&Je .17LkSr 44 1 r ---- jt ) 8u>wDvwN --? Te N7Al.J c 1.1 l-ol►-t be CONC. /4 /24Gi7•AJ 7 MJF P IA)PiArL 1-4°t,r7(N� 1141 Z 1"J /j q l0N%) • O WA7 Michael F.Easley,Govemor 0� QG State of North Carolina F'" William G.Ross,Jr.,Secretary Department of Environment and Natural Resources 7 :::./- Alan W.Klimek,P.E.,Director Division of Water Quality January 12, 2003 • Mr. Robert W Oreskovich, Director Dare County Water Department 600 Mustian Street Kill Devil i. i s, North Carolina 27948 Subject: NPDES Permit Correction NPDES Permit No. NC0086932 Dare County - Stumpy Point Reverse Osmosis Discharge Dare County Dear Mr. Oreskovich: . A typographical error w... discovered in Part A.(1.) of the NPDES permit for the Stumpy Point Reverse Osmosis facility. ootnote No. 3, two of the toxicity testing months were inadvertently left out (although 'art • .(2.) of the permit refers to all the proper testing months). Please find en losed th- revised permit page (Effluent Limitations and Footnotes, Part A.(1..)). The revised p.:e should - inserted into your permit. The old page may then be - • discarded. All other terms d conditio - contained in the original permit remain unchanged and in full effect. This permit odification is .sued under the requirements of North Carolina General , • Statutes 143-215.1 and e Memorandu of Agreement between North Carolina and the U. S. Environmental Protection Agency. • If any parts, m i asurement frequenc -s or sampling requirements contained in this permit modification are unacce•table to you, you hay- the right to an adjudicatory hearing upon written request within thirty (3$ days following receipt of this letter. This request must be a written petition conforming to I hapter 150B of the No k Carolina General Statutes, filed with the Office of Administrative He. b gs (6714 Mail Service C: ter, Raleigh, North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding. If you have . y questions concerning is permit modification, please contact Susan Wilson at (919) 733-50: , extension 510. Sincerely, Alan W. Klimek, P.E. cc: Washington Regional Offi•e, Water Qu. ty Section Aquatic Toxicology Unit, . n Gior: o NPDES Unit Central Files North Carolina Division of Water Quality (919)733-7015 1617 Mail Service Center FAX(919)733-0719 Raleigh,North Carolina 27699-1617 On the Internet at http://h2o.enr.state.nc.us/ 0-/ Wo(r.3 b-rra. erten. P20 s • u ?7 ) 'hwoI•4c a= Wm.'s/ 1S7-0 $01-5/.vs _r C Kivusfir 4560 I4,02- Awl/ '6V , td4A/7- ce n w/At n Alike / .k Pew— lJ w,o�r A fr-argo s••T c. oc - /N Oise n/ ev .► Ci5 Lctsa l (Ft fi,' Ww)i• C4W mace. is Ail 44/0 /P L"%7 L-mss DkT' i/ZR/°3 042. 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The addition of this stream to the new ash pond with the dilution this stream will receive from the ash sluice water appears to be the appropriate method to treat this waste stream. I would therefore recommend approval of the permit modification. If you should have any questions please contact me at (828) 251- 6208. DIVISION OF WATER QUALITY December 12, 2003 To: Larry Frost, Environmental Chemist WQ, Asheville Regional Office From: Susan A. Wilson, Environmental Enginee NPDES Unit Subject: Permit Modification Request Progress Energy-Asheville Steam Electric Plant NPDES Permit No. NC0000396 Buncombe County Attached to this memo is the major NPDES permit modification request for Progress Energy. They are requesting a modification to their Asheville Steam Electric Plant. This modification request is due to the addition of scrubber(s) at the plant to comply with North Carolina's Clean Air Initiative (the Clean Smokestacks Bill). Please provide me your comments on their request and notify me when as to when you will perform a site visit. I hope to have a draft permit for your review by the end of January (estimated). If you have any questions, please contact me at (919) 733- 5083, ext. 510. RE:Truck washing at Asheville(NC0000396) Subject: RE: Truck washing at Asheville (NC0000396) Date:Thu, 6 Nov 2003 14:42:31 -0500 From: "England, Louise" <louise.england@pgnmail.com> To: "'Larry Frost" <Larry.Frost@ncmail.net> CC: Susan A Wilson <susan.a.wilson@ncmail.net> Larry, Water from Lake Julian will be used to wash the trucks. There will be no chemicals used. Thanks for your response. Louise England Progress Energy Carolinas, Inc. (919)362-3522 Original Message From: Larry Frost [mailto:Larry.Frost@ncmail.net] Sent:Thursday, November 06, 2003 2:34 PM To: England, Louise Cc: Susan A Wilson Subject: Re: Truck washing at Asheville (NC0000396) Louise I have no issues with the truck wash at the Asheville Plant. Are you intending on some sort of chemical addition in the washing process or water only?I don't think it will make a difference in my answer but I would like to know. Thanks Larry Susan A Wilson wrote: Louise, I don't think we'd require an ATC for that since it's going straight to the new ash pond and it's such a minor addition with no separate treatment(just state as part of the application what you've explained here and where the pipe will connect(to new ash pond)); we'll reference it in the permit. I'm copying Larry on this in case he feels differently. Also -Larry will be the ARO contact for the scrubber project. "England,Louise" wrote: Susan, With the increase in truck traffic(delivering limestone&coal, removing gypsum, etc.) at the Asheville Plant, plant personnel would like to install a truck wash station. The water from this truck wash station would discharge into the new ash pond. At the most there will be 50 to 60 trucks washed daily. Unfortunately I do not at this time know how much water will be produced per washing. I also do not know if the water will be directly piped to the new ash pond or if it will discharge through an existing pipe. With the limited information I have given you, do you think that an ATC will be needed? This waste stream will of course be included in an amendment to the permit application. Please let me know if you have any questions. is Thanks, 1 of 2 11/6/03 5:28 PM RE:Truck washing at Asheville(NC0000396) i Louise England Progress Energy Carolinas, Inc. (919)362-3522 Susan A. Wilson, P.E. Environmental Engineer NPDES Unit,Division of Water Quality Larry Frost-Larry.Frost@ncmail.net North Carolina Dept. of Environment and Natural Resources Asheville Regional Office Division of Water Quality -Water Quality Section 59 Woodfin Place Asheville,NC 28801 Tel: 828-251-6208 ext: 288 Fax: 828-251-6452 2 of 2 11/6/03 5:28 PM • Progress Energy !a` 9 BY HAND DELIVERY File No.: 12520A October 14, 2003 Mr. David Goodrich North Carolina Depar`ment of Environment and Natural Resources Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Subject: Progress Energy Carolinas, Inc. (PEC) Asheville Steam Electric Plant NPDES Permit No. NC0000396 NPDES Permit Modificat..)n - Flue Sas Desulfurization Wastewater Dear Mr. Goodrich: Progress Energy is planning on installing Flue Gas Desulfurization (FGD) systems at several of our coal-fired plants in North Carolina in response to the North Carolina Clean Air Initiative. Asheville Steam Electric Plant will be the first Progress Energy facility to install the FGD system. Operation of the system is projected to begin in the fourth quarter of 2005. The FGD system removes SO2 by mixing the flue gas with a limestone slurry producing gypsum. With this FGD operation a new wastewater stream will be produced. Blowdown from the FGD system will be discharged into the new ash pond which ultimately discharges via Outfall 001 into the French Broad River. Enclosed is a table with expected flow and concentrations of parameters in the wastewater stream. Because of the addition of the FGD blowdown, PEC is amending the NPDES permit application to include this new wastewater stream. According to our schedule we will need the permit issues resolved by April 30, 2004. Enclosed are revised Attachments 2, 3, and 4 of the NPDES permit application and the permit modification fee of$860.00. In addition, Attachment 4 has been revised to reflect the usage of DustTreat DC9136 as a coal dust suppression chemical for the coal pile. After your staff has had an opportunity to review the information in this submittal, PEC requests a r-,eeting to discuss future actions. Please contact Louise England at (919) 362-3522 to schedule the meeting. If you have any questions regarding any information in this submittal please call Louise England at (91 9) 362-3522. Progress Energy Carolinas,Inc. Asheville Steam Plant 200 CP&L Drive Arden,NC 28704 I certify, under penalty of law, that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment for knowing violations. Sincerely, ‘,,,,-de— William A. Phipps Plant Manager—Asheville Plant Progress Energy Carolinas, Inc Asheville Steam Electric Plant FGD Blowdown Estimated Concentrations The flowrate of the FGD blowdown will be approximately 0.039 MGD. Parameter Estimated FGD Blowdown Concentration (ppm) 0,1/t Antimony 0.159 Arsenic O 0.122 5o Barium 5.561 Beryllium 0.003 Boron 0.570 __ Cadmium 0.018 2- Chloride Chloride 20,000 L 4-71:4-0 a4e1 z3°114 Chromium 0.183 5o Cobalt 0.190 Copper 0.133 AL. -►ra I4_ Fluoride 12.0 1.% NIL Lead 0.220 zs,,5/4 Manganese 23.837 Mercury 0.069 0.01z i,/L Molybdenum 0.035 Nickel 1.140 -- g$ Selenium 9.720 - s /5-6 Silver 0.014 Sulfate 10,819 Thallium 0.112 Vanadium 0.139 Zinc 8.202 - Rt- - So 1 Z to l 96ed (lunoa agwooung Weld 0u10912 weals all!naysV oul'seu!laeo A6iau3 ssaJ6ad wals�(S walsi(S �(�ddnS ---1 - saioolouyaal luawlea�l pue'uopnpod e6eMaQ < AJel!ueS < JaleM lo seoJnog'sMold VII wall-OZ UUO)-Z luawyaeliV }loun�J ol�gnd 0 pue algelod o!Ignd Gild POO a6edoGS wea >1 JaleM WJolS A L.00 IlellnO u!se9 buiInaS - r Y Jan! < /(JepuooaS - isaoJnos alseM < peoJ9 LlouaJd V puod qsy a awn�on nno� 4----- uollezunlinsea r - MGN see Gnld al!S au!gJni I ^—)1 A + W uoilsngwoa 0 luawleaJl_Glenn v 2:1 - pailddns Jopuan JaleM aoinJas ' 0 A JaleM JaleM wals,(S 0 X eons 6uiueala uo!loaloid dwnd UStI Jeleayad Gild < aJ!d SJaI!o9 u! elseM 6u!ueala uo!leiodena< 1 IeIaIN !w leoog3 A 1 lasa!a ' I T 1 A 1 1 4' Ja6ueyox3 leaH of dwnS usy < 4----- aJnlonJls uei�n( Jale, ugelnona d 6ai!elul N ai{e-1 9A Z00 IlellnO * sJesuapuoa < < Guo Z ue!lnp a�{ei S Z '8 I- Win 6uillleS a puod qSy I PIO < JeleMwJojS a>{elul JaleM JanI�l da-w!eW < peoJ9 youaJd • Progress Energy Carolinas, Inc. • Asheville Steam Electric Plant National Pollutant Discharge Elimination System Permit Number NC0000396 Attachment 2 Form 2C - Item II-A Flow, Sources of Pollution, and Treatment Technologies Stream Name Average Flow Comments A Ash Pond Discharge 2.55 MGD Outfall 001 B Intake to Once-through Cooling& 250.1 MGD Circulating Water to Heat Exchangers C Plant Potable and Sanitary Uses 0.002 MGD To POTW D Makeup to Lake from River 5000 gpm Maximum Flow-Utilized During Dry Weather E Low Volume Wastes • Ash Hopper Seals 0.05 MGD • Sandbed Filter Backwash 2600 GaUevent Rare Usage • Water Softener Regeneration and 3100 GaUevent Rare Usage Washing • Boiler Blowdown 0.006 MGD Startup-Estimated F Circulating Water from Heat Exchangers 19.3 MGD Estimated G Ash Sluice Water 2.0 MGD Estimated H Dam Seepage 0.09 MGD Calculated I City Water Supply to Boiler Makeup 0 MGD Rare Usage J Coal Pile Runoff 0.01 MGD Based on Average Annual Rainfall of 47"and 50%Runoff K Storm Water 0.052 MGD Estimated L Chemical Metal Cleaning Wastes 0-90,000 Gallons Normal Practice is (0 gallons anticipated) Evaporation M Water From Combustion Turbine Facility 0-0.02 MGD Intermittent Operation N From Lake to Intake 250.15 MGD Estimated O Intake to Service Water 0.05 MGD Estimated Q Fire Protection Water 0.010 MGD Estimated R Air Preheater Cleaning 10,000 gallons/event Estimated S Discharge to Lake Julian 248.4 MGD Outfall 002-Estimated T Emergency Fire Protection Water 0 Used for fire fighting U Diesel Fire Pump to Lake Julian 0.128 MG/week Estimate-pump testing ✓ Flue Gas Desulfurization Blowdown 0.039 MGD Estimated X Intake to FGD system 0.864 MGD Estimated 2 • Carolina Power& Light Company • Asheville Steam Electric Plant National Pollutant Discharge Elimination System Permit Number NC0000396 Attachment 3 Form 2C - Item II-B Flow, Sources of Pollution, and Treatment Technologies The Asheville Steam Electric Plant is located in Arden, North Carolina south of Asheville, North Carolina. The Asheville Steam Electric Plant is a coal-fired, steam cycle electric generating plant with two generating units. Two Internal Combustion (IC)Turbines are also located on the plant site. The plant has a 320-acre cooling lake (Lake Julian)on the east side of the French Broad River in Buncombe County, North Carolina. Chemical constituents contained in the discharges from this plant will, in part be representative of the naturally occurring chemical quality of the intake water and will also have chemical constituents of such quality and quantity associated with similar discharges for fossil generating facilities of this size, type and in this geographical location. Either all or part of the elements listed on the Periodic Table, either singularly or in any combination, may from time to time be contained in the discharge. Outfall 001 - Discharge from Ash Pond to French Broad River The Plant's ash pond, which is located east of the French Broad River and south of the plant, discharges into the French Broad River. The ash pond receives ash sluice water, low volume wastes, coal pile runoff, air preheater cleaning water, fire protection system drainage, chemical metal cleaning wastes (potentially), storm water and other waters from the Combustion Turbine Facility constructed on the Plant's site. The proposed wheel wash and weigh stations will also discharge to the Ash Pond. The Pond provides treatment by sedimentation and neutralization to the above-referenced individual waste streams. Water leaves the ash pond via a standpipe with skimmer and flows by pipe and lined ditch to a secondary basin, where it is discharged by overflow to a ditch that coveys it to the French Broad River. Detailed descriptions of the individual waste streams are below. Ash Sluice Water Fly ash and bottom ash from both units are hydraulically conveyed by an ash sluice pipeline to the ash pond. An Amine Enhanced Fuel Lean Gas Rebum (AEFLGR) process will be installed on Unit 1 in the spring of 2000. This process utilizes urea to reduce NOx emissions and will be 1 Carolina Power& Light Company Asheville Steam Electric Plant National Pollutant Discharge Elimination System Permit Number NC0000396 used in high ozone months (approximately May through September). A byproduct of this process is ammonia which will be carried to the ash pond via ash sluice water. Coal Pile Runoff Storm water runoff from the coal pile is collected in drainage ditches that surround the coal pile. The drainage ditches are routed to the ash pond for treatment. During maintenance activities, sludges removed from catch basins, sumps, etc. may be transported to the old and/or the new ash pond for disposal. Storm Water Storm water runoff from the plant area, parking lots, combustion turbine area, oil storage and handling facility and the plant's 115 KV substation is routed to the ash pond for treatment. During maintenance activities, sludges removed from catch basins, sumps, etc. may be transported to the old and/or the new ash pond for disposal. Low Volume Wastes Boiler water make up is withdrawn from Lake Julian and purified utilizing vendor supplied equipment. A second option is to perform these activities using plant equipment to filter, soften, and evaporate make up water with the filter backwash, softener regeneration, and softener rinses discharged to the ash pond. The water softeners are regenerated using salt. Boiler water is treated with ammonia, hydrazine, and sodium hydroxide. Boiler and evaporator blowdown and drainage is sent to the ash pond and may contain small quantities of the chemicals. Some molybdate waste from the closed cooling water system is created through valve leakage and maintenance activities and is discharged to the ash pond. A furnace ash hopper seal is maintained by using plant service water. A standard operation water level is maintained in a seal trough for the ash hopper seal. Overflow from this trough is discharged to the ash pond. A sodium hydroxide solution is fed into this flow stream as necessary for ash pond pH adjustment. Coal dust suppression is achieved by spraying a proprietary chemical on coal at different stages of coal use. Small amounts of excess dust suppression chemical have the potential to be discharged to the ash pond via plant drains or coal pile runoff. Small amounts of urea waste from bulk urea unloading operations are discharged to the ash pond. All plant area floor drains are routed to the ash pond and include equipment drainage and wash down along with rainfall runoff. During maintenance activities, sludges removed from catch basins, sumps, etc. may be transported to the old and/or the new ash pond for disposal. 2 r ' , Carolina Power& Light Company • Asheville Steam Electric Plant National Pollutant Discharge Elimination System Permit Number NC0000396 In many cases, added chemicals are consumed or chemically altered during the plant processes. Only trace amounts might be recoverable in water entering the ash pond. Detectable levels of these chemicals would not be expected to occur in ash pond discharges. Flue Gas Desulfurization Blowdown (Low Volume Waste) The Flue Gas Desulfurization (FGD) system directs flue gas into an absorber where a limestone (calcium carbonate) slurry is sprayed. Sulfur dioxide in the flue gas reacts with the limestone to produce calcium sulfate (gypsum). This system reclaims any unreacted limestone slurry to be reused in the absorber. A small blowdown stream is used to maintain the chloride concentration in the reaction tank. The blowdown stream is discharged into the new ash pond. Air Preheater Cleaning (Low Volume Waste) After the Amine Enhanced Fuel Lean Gas Reburn (AEFLGR) system is operational, the air preheater will be water washed on a more frequent basis. It is expected to require cleaning once per year or more frequently as needed. The wastewater from this activity will be discharged to the ash pond. Chemical Metal Cleaning Wastes The boilers are chemically cleaned every five-to-eight years using a weak citric acid solution. This cleaning solution and its rinses are stored on site for disposal by evaporation in an operating unit's furnace. Typical cleanings would result in a waste of approximately 80,000 gallons. Should evaporation not be used, the waste can be routed to a treatment basin for neutralization and precipitation prior to being conveyed to the old ash pond with permission of the DWQ, to the newer ash pond, or other means of disposal. Cleaning of other heat exchanger surfaces may produce 5,000-10,000 gallons every three-to-five years. Other Wastes Operation of the combustion turbine (CT) generation facility may produce turbine blade wash water, inlet filter cooling water, various condensate waters, and water from equipment and tank drains. These wastewaters will be collected in the storm water collection system of the CT site and routed to the ash pond. During maintenance activities, sludges removed from catch basins, sumps, etc. may be transported to the old and/or the new ash pond for disposal. 3 • • Carolina Power& Light Company • Asheville Steam Electric Plant National Pollutant Discharge Elimination System Permit Number NC0000396 - Plant Potable and Sanitary System - The supply of water for plant potable and sanitary use is obtained from the Asheville/Buncombe Water Authority system and waste from this system is discharged to the Metropolitan Sewage District System. - 230 KV Substation Storm Water- Storm water runoff from the substation located adjacent to the plant is conveyed to the old ash pond. Outfall 002 - Discharge to Lake Julian Once-Through Cooling Water This flow provides condenser cooling water for the generating units 1 and 2. Maximum condenser flows for units 1 and 2 are 124 MGD and 162 MGD, respectively. Once-through cooling water is used to supply non-contact cooling water for the component closed cooling water system. The component dosed cooling water system flows combine with unit 1 and 2 condenser flows prior to discharge to Lake Julian. Maximum component closed cooling water system flows for unit 1 and 2 are 9.1 MGD and 10.2 MGD, respectively. Discharge flow to Lake Julian is calculated at the intake to unitsl and 2 condensers and to the circulating water to the heat exchanger. The discharge of water from the heat exchangers is routed to an ash sump. The majority of this water is further routed to the discharge of units 1 and 2 condensers. Less than one per cent of the flow to the ash sump is used to supply ash sluice water, preheater leaning water, and fire protection water. Control of biological fouling on heat-exchanger surfaces is accomplished by addition of sodium hypochlorite as required, which is usually less that 2 hours per day per unit, with a net total residual chlorine of less than 0.2 ppm discharged during that period. Cooling is accomplished by evaporation from the surface of Lake Julian and mixing and convection with lake waters. Make up for Lake Julian is from the French Broad River, natural runoff and creek flows. Water is pumped from the French Broad River during dry periods to supplement the flow. Although discharge from Lake Julian to the river is extremely rare, any occurrence would be during periods of heavy rainfall. 4 r • • Carolina Power& Light Company • Asheville Steam Electric Plant National Pollutant Discharge Elimination System Permit Number NC0000396 Attachment 4 Form 2C - Item VI - Potential Discharges Not Covered By Analysis Chemical Estimated Quantity Frequency Purpose Used (per year) Hydrazine (35%) 400 gallons Continuous Oxygen scavenger in boiler Ammonium hydroxide 500 gallons Continuous pH control of boiler water Sodium hydroxide 24,000 gallons Continuous pH control of ash pond Sodium hydroxide 30 gallons As required pH control of boiler 50%) _ water Sodium hypochlorite 10,000 gallons Daily during warm Control of biological (15%) months fouling on heat exchangers Sodium molybdate 100 pounds As required Corrosion control in closed cooling water system Sodium chloride 25,000 pounds As required Water softener regeneration Urea 150,000 gallons Continuous during NOx control high ozone months Molten Sulfur 120 tons Continuous Particulate matter control BetzDearborn 11,400 pounds - As required Coal dust suppression- Dustreat DC9136 estimated proprietary chemical Fyrewash (detergent) 200 gallons As needed Combustion turbine blade washing Calcium Carbonate 129,000 tons Continuous when Flue Gas _ plant is operating Desulfurization system Detergents/cleaning Variable As needed Housekeeping agents 1