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HomeMy WebLinkAboutNC0028941_Wasteload Allocation_19930512NPDES DOCUMENT $CANNINO COVER SHEET NC0028941 Pine Valley WWTP NPDES Permit: Document Type: Permit Issuance '. Wasteload Allocation Authorization to Construct (AtC) Permit Modification Speculative Limits Complete File - Historical Instream Assessment (67B) Environmental Assessment (EA) Permit History Document Date: May 12, 1993 This; document iOs printed on reuise paper - ignore any content on the resrernse ride DIVISION OF ENVIRONMENTAL MANAGEMENT May 12, 1993 MEMORANDUM TO: Jule Shanklin FROM: Susan A. WilsonpALt THROUGH: Ruth Swanek SUBJECT: Pine Valley Subdivision Draft Permit Setman Branch, Yadkin River Basin (030706) Rowan County The Technical Support Branch (TSB) has received the letter addressed to Coleen Sullins regarding Rachel Stogner's comments on the NPDES draft permit. TSB has attached the USGS flow estimates that were used in devising the wasteload allocation. As was TSB's policy at the time the WLA was performed, any USGS flow later than 1985 was appropriate to use for renewal permits. The drainage area of 0.16 square miles is appropriate for the discharge point, which, by our records, is very near the headwaters of Setman Branch. The 0.74 square mile drainage area which was used in the 1981 wasteload allocation was probably in error, as that drainage area corresponds to the mouth of Setman Branch and not the discharge point, according to 1987 USGS information. The low flow study entitled "Procedures for Projecting Low Flow Statistics at an Ungaged Site" is also attached. TSB suggests that the permittee first request updated flows for this site before submitting plans to conduct a low flow study (as there is a remote possibility that the flows have changed). The permittee should be informed that USGS will assess a charge on this request. Due to the Yadkin basinwide plan, this permit is up for reissuance in July 1994. TSB recommends, due to the short term nature of this permit, that the permittee be allowed to postpone the engineering evaluation until the next permitting period. This will allow the facility adequate time to request new flows from USGS and to conduct their own streamflow study if necessary. The study should be completed during the summer and fall of this year. The results of the study should be available to USGS and TSB 180 days prior to the next permit renewal (similar to the timeline given for the engineering evaluation). Should the study indicate zero 7Q10 and zero 30Q2 values, then upon permit renewal in 1994 the facility should receive the standard zero flow policy language requiring the engineering evaluation. TSB recommends that the facility receive the existing limits and a condition in the permit requiring the streamflow study, in lieu of the engineering evaluation. The permittee should be aware that this may incur extra cost, since the flows may still be zero. Should this situation Qccur the permittee would still be required to conduct the engineering evaluation within the next permit renewal period, beginning in July 1994. cc: Rex Gleason (Mike Parker), MRO State of North Carolina Department of Environment, Health, and Natural Resources Division of Environmental Management 512 North Salisbury Street • Raleigh, North Carolina 27604 James B. Hunt, Jr., Governor Jonathan B. Howes, Secretary MEMORANDUM To: MRO-Mike Parker TSB -Susan Wilson From: Jule Shankli Subject: NC0028941, Pine N alley Subdivision Draft Permit Date: 4/20/93 Encl.: 2/9/93 letter from Rachel Stogner to Coleen Sullins Please provide your respective inputs relative to the enclosure at your earliest convenience so that all available feedback can be factored into a response to Ms. Stogner. thanks Regional Offices Asheville Fayetteville Mooresville Raleigh Washington Wilmington Winston-Salem 704/251-6208 919/486-1541 704/663-1699 919/571-4700 919/946-6481 919/395-3900 919/896-7007 Pollution Prevention Pays P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone 919-733-7015 An Equal Opportunity Affirmative Action Employer 0'2i411/93 12:17 FAX 704 788 6006 EWS, RAYCO INC. P01 • NC LicenaejRC1378 RAYCO UTILITIES, INC. 4220 Highway 29 Harrisburg, NC 28075 • (704) 788-9497 February 9, 1993 Ms. Coleen Sullins NPDES Permits Group Division of Environmental Management NC Department of EHNR P.O. Box 27686 Raleigh NC 27611-7687 Subject SC License 5341 : Draft NPDES Permit No. NC0028941 Rayco Utilities, Inc. Pine Valley Subdivision Wastewater Treatment Plant Rowan County Dear Ms. Sullins: This letter is in reference to the subject draft permit you have scheduled to issue on February 15, 1993. I am writing to express concerns with the draft that I hope may be resolved prior to issuance. Specifically, I am concerned with the two (2) items as follows: 1) The proposed expiration date of July 31, 1994. 2) Part III E. Zero Flow Condition I understand the rationale which is prompting issuance of permits for less than the five (5) years allowed, but I feel that this is an unreasonably short duration (fourteen and a half months) that presents an unnecessary burden to us. We ask that you reconsider and extend the proposed expiration date for a more appropriate duration. We have a more significant concern with the zero flow condition. This subject was first alluded to in a letter dated ,,January 21, 1992 from Mr. Michael L. Parker of your Mooresville Regional Office. Mr. Parker's letter indicated that there was a revised waste load allocation that would result in the inclusion of certain conditions among which would be an engineering evaluation to demonstrate that there are no practical alternatives to the discharge. Post-Ir brand fax transmittal memo 7671 r pea `. S... NADIR\luliiii\P"&ci clYt. - D4M5d F_kk Ph one 1' 04 - '12- GCOG Fe" r 901-1a3 ft 02i11/93 12:18 FAX 704 788 6006 EWS, RAYCO INC. P02 Ms. Coleen Sullins Page 2 February 9, 1993 This concerned us then as it concerns us now. As such we submitted a letter to Mr. Parker dated March 9, 1992 in which we expressed our concern and requested information to help us understand the reasoning behind this and the procedures we could use to properly demonstrate that this is not a zero 7Q10 flow stream. We received a response to this request by letter dated March 25, 1992, from D. Rex Gleason. This letter provided copies of some of the information needed to develop the effluent limits and indicated that we would 1e sent a copy of the procedures for conducting stream flow measurements. To date, we have not received this information. In the information received, we found it interesting that the drainage area was listed as 0.74 square mile in 1981 but 0.16 square mile in 1987 and since. Also, it is not clear whether the 7Q10 was fully reevaluated during this last renewal or the data (including the questionable drainage area) was simply reused. The accuracy of the stream flow estimate is extremely important. The proposed zero flow condition in the draft permit presents a significant, unnecessary and costly demand to conduct an engineering evaluation of the feasibility of eliminating the discharge. This should not be necessary since, as we expressed in our letter (copy attached), we do not believe this a zero flow stream. The methods used by USGS to "estimate" flow conditions in the receiving streams are not exact but are merely based on the best information and methods available. In this instance, we believe the estimate is simply in error and certainly should be reviewed more closely in lieu of proceeding with an evaluation of eliminating the discharge. We recognize that the limited resources of your office and USGS do not allow you to conduct more extensive evaluation of every site. We accept that we should share in this effort. I believe it would be more reasonable to allow us to review the information used to determine the flow estimated and, if necessary, conduct actual stream flow gauging following recognized and acceptable methods to more accurately demonstrate the conditions of the receiving stream • 02/ell/93 12:19 FAX 704 788 6006 EWS, RAYCO INC. P03 Ms. Col'een Sullins Page 3 February 9, 1993 I ask that you please review the matters discussed in our letter 'to Mr. Parker and provide us with the procedures for stream; gauging. Further, I request that you delete the current zero flow condition from the permit and replace it with a condition that requires that we conduct stream flow gauging, following appropriate procedures, to define stream flow conditions prior t7 permit expiration. This would allow us to resolve the question of receiving stream flow rather than accepting the estimated" flow and moving into a costly and difficult evaluation of eliminating the discharge. It is simply more prudent to resolve the issue of stream flow first before proceeding unnecessarily on a course that could ultimately cause great financial distress to our utility and to the service public. I appreciate your attention to our concerns and hope that you understand that we want to work with you in resolving these matters in a mutually beneficial way. I hope that you will call me if you have any questions or if we can be of any assistance. Thank you for the opportunity to input to the permitting process. Sincerely, 14511 Rschel S. 6Stogner President RSS/le1 NPDES WASTE LOAD ALLOCATION PERMIT NO.: NC0028941 PERMITTEE NAME: FACILITY NAME: Rayco Utilities, Inc. Pine Vally Subdivision Wastewater Treatment Facility Status: Existing Permit Status: Renewal Major Minor �l Pipe No.: 001 Design Capacity: 0.025 MGD Domestic (% of Flow): 100 % Industrial (% of Flow): Comments: STREAM INDEX: 12-108-21-4-1 RECEIVING STREAM: Setman Branch Class: C Sub -Basin: 03-07-06 Reference USGS Quad: E16NE, Rowan Mills (please attach) County: Rowan Regional Office: Mooresville Regional Office Previous Exp. Date: 5/31/92 Treatment Plant Class: Classification changes within three miles: > 3 mi. Requested by: Prepared by: Reviewed by: 3 3 ts6,0) Jule Shanklin Bo -Di - wq/Ft, II PLO IE Date: 11/19/91 s&t56D Date: e/5/9 Date: 1 Modeler Date Rec. # SAW /2 /91 ' 3 Drainage Area (mi2 ) p, I C Avg. Streamflow (cfs): U • 2- 7Q10 (cfs) 0 Winter 7Q10 (cfs) O 30Q2 (cfs) 0 Toxicity Limits: IWC Instream Monitoring: Parameters D. 0. Upstream Downstream i % Acute/Chronic FEE -AG coLi 1-6m'. CnnJDu&flytTl Location per t.ERST IDo / UF5114.6.411k Location At LFASr 3o0' DowiosTg_ektin Effluent Characteristics Summer Winter BOD5 (mg/1) 10 I0 NH3-N (mg/1) 4 4 D.O. (mg/1) (0 6 TSS (mg/1) 30 30 F. Col. (/100 ml) Zoo Zoo pH (SU) 6 _ 1 14 The facility discharges into a stream with 7Q10/30Q2= cfs. Removal of tdischarge is recommended if a more environmentally sound alternative is available at an economically reasonable cost. An engineering report evaluating alternatives to discharge is due 180 days prior to permit expiration along with the permit renewal application. As part of the report, the cost of constructing a treatment plant at the discharge point to meet limits of 5 mg/1 BOD5, 1 mg/1 NH3, 6 mg/1 DO, and 17pg/1 chlorine should also be included E ; if there are no feasible alternatives to a surface discharge. Upon review of the is results of the engineering report, the Division retains the right to reopen and L modify this NPDES permit to require removal of the discharge or to revise the permit limitations within a specified time schedule. State of North Carolina Department of Environment, Health, and Natural Resources Division of Environmental Management 512 North Salisbury Street • Raleigh, North Carolina 27604 James G. Martin, Governor William W. Cobey, Jr., Secretary George T. Everett, Ph.D. Director DIVISION OF ENVIRONMENTAL MANAGEMENT March 25, 1992 Mrs. Rachel S. Stogner, President Rayco Utilities, Inc 4200 Highway 29 Harrisburg, North Carolina 28075 Dear Mrs. Stogner: REGEiVED MAR 2 7 1992 TECHNICAL SUPPORT BRANCH Subject: Revised Wasteload Allocation Pine Valley Subdivision NPDES Permit No. NC0028941 Rowan County This Office is in receipt of your letter dated March 9, 1992 concerning changes/revisions in the Wasteload Allocation (WLA) for the subject facility. In your letter you indicated concern that the existing limitations have been made substantially more stringent since the Permit was last issued. You also indicated that the changes/revisions may have been developed from information regarding the receiving stream which is in error, consequently effluent limitations beyond the capability of the existing treatment facilities are being imposed. In addition, several items of information were requested which dealt with the WLA process. Please find enclosed a copy of the map used to identify the subject facility's discharge location for the purposes of promulgating the WLA (item No. 1 of your letter). Also please find a copy of past WLAs (item No. 2 of your letter). As for the other information you requested (items No. 3, 4 and 5 of your letter), this informs ion can be obtained through our Technical Support Branch, and y copy of this letter we are asking them to provide you with the information. REGIONAL OFFICES Asheville Fayetteville Mooresville Raleigh Washington Wilmington Winston-Salem 704/251-6208 919/486-1541 704/663-1699 919/733-2314 919/946-6481 919/395-3900 919/896-7007 Pollution Prevention Pays P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone 919-733-7015 An Equal Opportunity Affirmative Action Employer Mrs. Rachel Otogner March 25, 1992 Page Two If you have any questions regarding this matter, please contact Mr. Michael L. Parker or me at (704) 663-1699. Enclos es cc:- revor MLP lements Sincerely, D. Rex Gleason, P.E. Water Quality Regional Supervisor RAYCO UTILITIES, INC. 4200 Highway 29 Harrisburg, NC 28075 (704) 788-9497 fit, a Mrr. or NATO' RESOURCES AND M 'Z �1TC License {TY DEYELOP ;AR 1 0 1992- March 9, 1991 $ Vrr% Of imMOKMUITAL Watts .tg ittORESIIUI aE WWtL orI Mr. Michael L. Parker Environmental Engineer II Division of Environmental Management NC Depart of EH and NR PO Box 950 Mooresville, NC 28115 Subject: Revised Wasteload Allocation Pine Valley Subdivision NPDES Permit No. NC0028941 Rowan County Dear Mr. Parker: SC License 5341 This 4tter is in response to your letter dated January 21, 1992 w ich advised of your intent to incorporate certain change0 and additional requirements in the forthcoming renewed permit. These matters are obviously of great concern and at this point,;we do not fully understand the need for such drastic changes. It appears that the basic concern is the estimated flow in the receiving stream. We have operated this facility for over five (5) years and have never experienced a zero flow condition. We recognize that the stream is relatively small but the stream is spring fed and maintains a continuous base flow. This obversation is supported by the fact that we have faithfully reported upstream and downstream concentrations (as required by the permits) and that, not only was there flow, but there were no contraventions of water quality standards. It should be obvious that not only is there flow in the stream but it is sufficient to assimilate the wastes concentrations currently being discharged. It is our understanding that this is the intent of the effluent limitations to protect the water quality of the receiving stream. Considering this, we can see no justification for tightening the existing limits. Mr. Michael L. Parker Page 2 March 9; 1992 In our opinion, the proposed changes are unnecessary and may be proposed based on information that is in error. The proposed effluent limits are well beyond the intended capability of this facility and there is no practical alternates to eliminate this discharge. Due to the seriousness of these proposed changes and the impact they would have, we ask that you reconsider and not revise the existing limits or conditions. We hope that you will agree that such changes are not needed. However if you still intend to change the effluent limits, we ask for your cooperation the exchanging information that will h 1p us understand the reasons why and will help us plan subsequent action. Specifically we ask that you provide copies of the following information. 1. A copy of the USGS Map indicating the locating of the discharge for which you based the waste load allocation. 2. A copy of the original wasteload allocation which in Ludes the 7Q10 and 30Q2 flow estimates and drainage ba in for the original NPDES permit and subsequent reissuances and renewals of the permit for this facility. 3. A copy of the "...(zero flow policy)" which explains the procedures being followed in changing these limits. 4. A Copy of the procedures to be followed in conducting a site specific monitoring of stream flow to verify the correct 7Q10 and 30Q2 of the receiving stream. Please include directions on the appropriate procedures to be followed in requesting to conduct such stream monitoring per Division of Environmental Management approval. 5. A fo opy of the flow estimate provided by USGS as a basis this waste load allocations. Again, we hope that you will reconsider and continue our permit under the existing limits especially since these limits !lave shown to protect the receiving steam. Mr. Michael L. Parker Page 3 March 9, 1992 Regardless, we appreciate your assistance in this regard and will look forward to your reply. If you have any questions or if we can be of assistance, please call. Sincerely, Rachel S. Stogner President RSS/bh • Facility Name: NPDES No.: Type of Waste: Facility Status: Permit Status: Receiving Stream: Stream Classification: Subbasin: County: Regional Office: Requestor: Date of Request: Topo Quad: FACT SHEET FOR WAS I ELOAD ALLOCATION Pine Valley Subd. NC0028941 Domestic - 100% Existing Renewal Setman Branch C 030706 Rowan z MR0714J,r J. Shanklin 11/20/90 E16NE Request # 6613 P. C. DEPT. OF NATURAL RESOURCES AND COMMUNITY DEVELOPNIEN'Jil J nN 1 61992 DIVISI::N OF 'FVIVEMTAt MANAGEMEllt MOBRESIILLE REGIONAL OFFICE Stream Characteristic: USGS # Date: Drainage Area (mi2): Summer 7Q10 (cfs): Winter 7Q10 (cfs): Average Flow (cfs): 30Q2 (cfs): IWC (%): 0212078402 1987 0.16 0.0 0.0 0.2 0.0 100.0 Wasteload Allocation Summary (approach taken, correspondence with region, EPA, etc.) Facility discharges to stream with 7Q10/30Q2 = O. Removal of discharge is recommended in three years or new limits (page 2) will apply at that time. Facility must submit an engineering report within 12 months of the effective date of this permit showing no alternative to surface water discharge. The facility has had 1 fecal coli violation in the past year. Instream data shows up and downstream flow, but the facility did not indicate where the up and downstream flows were taken. Instream DO's during the winter months are not much greater than those in summer (could be suspect). Special Schedule Requirements and additional comments from Reviewers: Clu o ktI6,1t NIA g a Rat-, ttE t v,,ti- p-wok 2 Recommended by: Reviewed by Instream Assessment: t xfQ4A CLLk' --n 'Phal Regional Supervisor: (/)( Permits & Engineering: Date: %Z72.,l Date: 1 a /SO 4 / Date: 1peiq Date: / (f .v FEB �ra�N -ro k att. SuPPoivT 6\1 i• f,(,;- t - OK'd MIS wait M.p• (Af2,0). 7ntip em- NEw FLAW L4NyuA;E 3 Existing Limits: Wasteflow (MGD): BOD5 (mg/1): NH3N DO (mg/1): TSS (mg/1): Fecal Col. (/100 ml): pH (SU): Recommen ed Limits: Wasteflow (MGD): BOD5 (mg(I): NH3N (mg/1): DO (mg/1): TSS (mg/1): Fecal Col. (/100 ml): pH (SU): Residual Chlorine (µg/1): Oil & Grease (mg/1): TP (mg/1): TN (mg/1): PARAMETERS Monthly Average Summer Winter WQ or EL 0.025 0.025 10 10 4 4 6 6 30 30 1000 1000 6-9 6-9 For three years: Monthly Average Summer Winter 0.025 0.025 10 10 4 4 6 6 30 30 200 200 6-9 6-9 (.Io A ter three ye nthly Ave WQ or EL WQ WQ WQ ge Su .► I er inter WQ or EL 0.02 1.025 5.0 10.0 WQ 1.0 1.8 WQ 6.0 6.0 WQ 30.0 30.0 WQ 20'd.0 00.0 WQ I-9.0 :0-9.0 WQ 7.0 1 .0 WQ Limits Changes Due To: Parameter(s) Affected New procedures (zero flow policy) BOD5, NH3-N _X_ Parameter(s) are water quality limited. For some parameters, the available load capacity of the immediate receiving water will be consumed. This may affect future water quality based effluent limitations for additional dischargers within this portion of the watershed. OR No parameters are water quality limited, but this discharge may affect future allocations. • 4 INSTREAM MONITORING REQUIREMENTS Upstream Location: at least 100 ft upstream Downstream Location: at least 300 ft downstream Parameters DO, Fecal coli, temperature, conductivity Special inseam monitoring locations or monitoring frequencies: MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS Adequacy of Existing Treatment Has the facility demonstrated tie ability to meet the proposed new limits with existing treatment facilities? Yes No ✓ 1 If o, which parameters cannot be met? BoD/ A) #3 / Tau W uld a "phasing in" of the new limits be appropriate? Yes _Z No If yes, please provide a schedule (and basis for that schedule) with the regional office recommendations: t XatiA4 u ;477e,a-toea.r.,,,,....97:7)•=4LO /5- Its=4>fiLae If no, why not? Special Instructions or Conditions Wasteload sent to EPA? (Major) _N (Y or N) (If yes, then attach schematic, toxics spreadsheet, copy of model, or, if not modeled, then old assumptions that were made, and description of how it fits into basinwide plan) Additional Information attached? _N (Y or N) If yes, explain with attachments. /JCS gy¢ p co Ci7/G/7/E5 %/vc. TMde^l SR. , c 9 A = 0.0zS t CrD CO?, Do/I.:CSTiC 1 �A�`Cv LCTr{,�, Prnl6 OLLEY SL %p. q = o. 0�5 is+cp v2/Z 078402!a VA-a(b0,z t 4 0.0 7Q(Qw=0.0 Ng3 _ N /4- 0 6 fr TS53a/30 r uir- .Cor_r = 1ob1000 pFl - -9 1�ISC1lA4L W[ r Mc P4�7. I /Jo ,5rAFF 1 r'G[AL Cop/ ✓l oil-R!/a iAJ f PAST Nt✓ - JGS;CcAM 4 AowiU5T2 4M M0N17a211/c TA(4 Dot ; 147 (Alp1C/Tl%. Of_ o� . VowN.`5"-?/ Ell.,Ait /IA.o/Ur702//U Z LoC47/o/JS -F /ink Sce P_Ecr D,o, Na • 1nIG 5_ Ak Luc,( /4/ kit /t/:ElL) STREAM DATA INSTREAM SELF -MONITORING DATA MONTHLY AVERAGES (J-14 z s ( 47-6 Discharger: PINS uty S4617, Permit No. .(90 Z094 j Receiving Stream: Upstream Location: DATE Dec-91 No -91 Oct-91 Sep-91 Aug-91 JuI-.9i Jun-91 May-91 Apr-91 Mar-91 Feb-91 Jan-91 Dec-90 Nov-90 Oct-90 Sep-90 Aug-90 JuI-90 Jun-90 May-90 Apr-90 Mar-90 Feb-90 Jan-90 Dec-89 Nov-89 Oct-89 Sep-8 Aug-8 Jul-8 Jun-8 May-8 Apr-8 Mar-8 Feb-8 Jan-8 TEMP D.O. COLD Sub -basin: Downstream Location: 2 FECAL COLI. 9 9 9 9 9 9 9 9 14.1-66 1.0071) 117 (0) io(20 6(781) 77,1(vac) i (?A) flig)C7f? 9,%, Cr5( o) / of ,,o) f3, 50,9 to6T, .Z?(zig) ±7(se) 0'40.°r, (4*,,(6o) 6,i(C86) 4-3(IID) 4r (17o) r9- (zo) ,24 If7, 605 '78'7%,2 )¢(i5) '7.o( .0) to o(to) '2-3(7z)J,q/0 z.F3(4o) P1 io) ?, 5(6,6) (4(zo ) �� j %C1 p Q J,O ('/ 0) 1 k7, 290Cz. 9 7(t90 ri(.Z lz) g.9(8,cb� • D.O. COLD FECAL CO 13(14O 'I,7i' 4,) 141(►7o Z y3) g.0(g.0Y 1270 4BC / /0 2((z-t 79(74) le. (b►o 2S(z8 ,,4(O,0) toi S�;A,,• .5z 6g0 7-7 C > R, il1. `i ZO813 3(24) 6.:1 (4,/ , 77zoo 37.((t ?.5 (7,4,) 1 - " Zh tic l ¢ OS '7,0(6, 6o(cza r4 (zo ,i Io (1) 7.4(7,4 Gs % ? 4.(to) -7•6. 07,2; 17 (30 (7 R.O(`�'.0) 14'd2o So(2 r4 (11) 6r7(SrG� ILs(io Page 1