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Home My WebLink AboutNC0025984_Speculative Limits_19920512N(O0 z 67fy 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 George T. Everett, Ph.D. Director William W. Cobey, Jr., Secretary May 12, 1992 Mr. M. Keith Webb, P.E. McGill Associates, P.A. P.O. Box 2259 Asheville, N.C. 28802 Subject: Town of Forest City Expansion Dear Mr. Webb: Your request for speculative effluent limits for the proposed expansion of Forest City's facility has been completed by the staff of the Technical Support Branch. The speculative nature of this analysis must be emphasized because of its completion without review from the staff of our Asheville Regional Office. Upon their review, additional information could be provided that was not input during this analysis. In order to receive final permit limits, a formal application will have to be submitted to the Division's Permits and Engineering Unit. Based on the information available, the Technical Support Branch developed effluent limits at the proposed expansion wasteflow of 5 MGD. The tentative summer and winter limits for conventional constituents are as follows: Summer Winter BOD5 (mg/1) 30 30 NH3-N (mg/1) 1.4 12.4 DO (mg/1) 6 5 TSS (mg/1): 30 30 Fecal Coliform (#/100m1) 200 200 pH (SU) 6-9 6-9 It should be noted that the tentative NH3 limits were evaluated and are based on the protection of the Second Broad River against instream toxicity. North Carolina is currently evaluating all NPDES dischargers for ammonia toxicity and following the Environmental Protection Agency (EPA) guidance to protect the waters for an instream criteria of 1 mg/l in the summer and 1.8 mg/1 in the winter, under 7Q10 conditions. Pollution Prevention Pays P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone 919-733-7015 An Equal Opportunity Affirmative Action Employer Page 2 Forest City Expansion May 7, 1992 Due to the large industrial constituency of Forest City's discharge, effluent limits were developed for metals at the expanded wasteflow. The most recent pretreatment information available was from January 1990, therefore updating this information, may change recommended limits. The recommended daily maximum limits are: Cyanide 35 ug/1 Phenols 7 ug/1 Lead 177 ug/1 Monthly effluent monitoring requirements should also be included for cadmium, chromium, copper, nickel, zinc, mercury, and silver. The instream waste concentration (IWC) at 5 MGD is 14% and a chronic toxicity testing requirement, with sampling in the months of January, April, July and October, will remain a condition of the NPDES permit. The facility should continue instream monitoring 50 feet above its outfall and 1.2 miles downstream of its outfall, just above Burlington Industries outfall. The parameters to be sampled are temperature, dissolved oxygen, conductivity, pH, fecal coliform, BODS and NH3-N. It should be noted that instream monitoring for BODS should be replaced by periodic long-term BOD monitoring after the State adopts a standard method of analysis. Under a new Division of Environmental Management (DEM) procedure, dechlorination and chlorine limits are now recommended for all new or expanding dischargers proposing the use of chlorine for disinfection. An acceptable level of chlorine in your effluent is 28 ug/1 for protection against acute toxicity. The process of chlorination/dechlorination should allow the facility to comply with the total residual chlorine limit. The DEM is currently planning a basinwide water quality management initiative. Our schedule for implementation in the Broad River Basin is tentatively set for 1998. The plan will address all sources of point and nonpoint pollutants. In addressing interaction of sources, wasteload allocations may be affected. Those facilities that already have high levels of treatment technology are least likely to be affected. The Town of Forest City may want to consider the implementation of this basinwide strategy in planning its expansion, as opposed to limits proposed here which only address localized receiving waters of the Second Broad River. Several problems have been noted in the Second Broad River in DEM's ambient chemical and biological monitoring stations downstream of Forest City and other dischargers. These problems include color, solids, BODS, fecal coliform, and NH3. Basin management plans are likely to develop strategies to address these problems. If your significant industrial users contribute color to your effluent, you many wish to begin building a database of influent and effluent color . You should contact the Technical Support Branch for specific procedures when testing color. It should also be noted that an expansion of more than 0.5 MGD for an existing facility, will require that an environmental document be prepared by the applicant. The N.C. Environmental Policy Act and its associated rules requires that an environmental assessment (EA) and Fonsi (Finding of No Significant Impact) be prepared before the permit for.expansion is issued. If the permit is controversial, there is a possibility that an environmental impact statement (EIS) might be needed. Boyd Devane of our Planning Branch can provide furtherinformation regarding the EA. He can be contacted at (919) 733-5083. Page 3 Forest City Expansion May 7, 1992 The final NPDES effluent limitations will be determined after the completion of your environmental assessment study and a formal permit application has been submitted to the Division. If there are any additional questions concerning this matter, please feel free to contact me at (919) 733-5083. revor Clements Chief hnical Support Branch JTC/JMN cc: Don Safrit Rex Gleason Boyd Devane Alan Wahab Central Files /1/C at, ,2 5, g FinA->r /241 3/9 G, o/ /?z, < / /h2, /,0Q5 • 40 I <,00s <,00 e,o5- e, d . 0 3— s- 1 ,a() 3 <,0 "YU ‹.°6 -0/ <.0o5" 05 <", 0 C. z, 05 e,o6 .2/91 <0o3e Z,05 //9/ <-,00 /2/9J <aoS 4".o 6 /6 0 < / < Z /00 e,o/ d / / Q z,oz ,o/) <02- ;0 4 0/ Z, OZ. 5—A, ( 0 _Cr I 6 4.3 9/ 9 / rete,,J jrnv (ti1,0 9, :249,2 0, / //7c. <e)/ /657 cGg77440e_ 03' ' z. Gr s 29 �l �(� a,.? S, 7s- 4(000 / /• (S.aA?G-i /.-5772 isa,e /, �- 97ca. 2 &: _ , S!xte /a) - // �e ceeo 6/, c.,g07-- #tom ve„, c4,r 4 0„vvf Lipiwv1.44, de, Aff17- 4/4 .r. ic„ 7. 7s c7c _ 7.75?17c75' s 7s- ?"- 1„/ Xt4, ./(4 ) Aiad",) CAL- — % /o,// — 57 d-1)i�1 44- ill+ /%'�a..r ✓'� Z,4..-J -n so M'42 //A, cam- MEMO DATE: TO: SUBJECT: C✓ o'30 tisk "/7/ 26o 1 /C_ '217' 3u• ay go kilt 54, 12/ 90 1tv CIS From tt, North Carolina Department of Environment, Health, and Natural Resources cs) Printed on Recycled Paper 3(Z ACONSULTING ENGINEERS McGILL ASSOCIATES, P.A. March 25, 1992 Mr. Donald Safrit, P.E. Supervisor Division of Environmental Management Permits and Engineering Unit Post Office Box 27687 Raleigh, North Carolina 27611 RE: NPDES Permit No. NC 0025984 Second Broad River Town of Forest City Dear Mr. Safrit: We are presently working with the Town of Forest City on an upgrade of their wastewater treatment plant. The plant currently has a capacity of 4.25 MGD and is being upgraded to add additional aeration time but with no increase in capacity. Discussions with the Town have indicated a desire to expand the capacity of the plant to 5.0 MGD. On behalf of the Town, I would like to request that a new waste stream allocation be run for the Second Broad River with a flow of 5.0 MGD for the Town of Forest City WWTP. The desire is to determine new effluent limits at a flow of 5.0 MGD and if the new limits will be more stringent than secondary limits. If there are any questions, please do not hesitate to call. Sincerely, McGILL ASSOCIATES, P A <169ii M. KEITH WEBB, P.E. MKW/drj cc: Chuck Summey Herb Toms Dean Morrison Jim Reid 91171.1 Safrit25 r _ o rn P.O. BOX 2259 / 704/252-0575 ASHEVILLE, NC 28802 704 252-2518 (FAX) 3B ORANGE STREET ASHEVILLE, NC 28801 forest city wwtp CHLORINE 7Q10: 47.0000 CL2 Effl. Conc: 0.9500 AL (17/19 ug/1) : 17.0000 Upstream CL2 Conc.: 0.0000 Design Flow: 5.0000 Predicted CL2 Downstream: 134.47 0.134474 CL2 Limit: 120.0967 0.120096 forest city wwtp ANALYSIS cfs mg/1 ug/1 ug/1 MGD ug/1 mg/1 ug/1 mg/1 AMMONIA ANALYSIS 7Q10: NH3 Effl. Conc: AL (1/1.8 mg/1) : Upstream NH3 Conc.: Design Flow: Predicted NH3 Downstream: NH3 Limit: 47.0000 16.6000 1000.00 220.0000 5.0000 2538.63 2.538630 5730.322 5.730322 AMMONIA 7Q10: 70.0000 NH3 Effl. Conc: 16.6000 AL (1/1.8 mg/1): 1800.00 Upstream NH3 Conc.: 220.0000 Design Flow: 5.0000 Predicted NH3 Downstream: 1852.73 1.852733 NH3 Limit: 16070.96 16.07096 cfs mg/1 ug/1 ug/1 Qxyet MGD ug/1 mg/1 ug/1 mg/1/ 03o» s- ANALYSIS (WINTER) cfs mg/1 ug/1 ug/1 MGD ug/1 mg/1 ug/1 mg/1 • G3M= 71 forest city wwtp AMMONIA ANALYSIS JJ 1,-044.71-,._- 7Q10: 47.0000 cfs /?b G NH3 Effl. Conc: 16.6000 mg/1 rtut AL (1/1.8 mg/1): 1000.00 ug/1 Upstream NH3 Conc.: 923.7000 ug/1 4 Design Flow: 5.0000 MGD Predicted NH3 Downstream: 3142.72 ug/1 3.142719 mg/1 NH3 Limit: 1462.722 ug/1 1.462722 mg/1; C809` ‘.6'D AMMONIA ANALYSIS (WINTER) 7Q10: 70.0000 cfs NH3 Effl. Conc: 16.6000 mg/1 AL (1/1.8 mg/1) : 1800.00 ug/1 Upstream NH3 Conc.: 621.8000 ug/1 Design Flow: 5.0000 MGD Predicted NH3 Downstream: 2214.48 ug/1 2.214482 mg/1 NH3 Limit: 12441.80 ug/1 12.44180 mg/1 ' C/ ,, - sS: Facility !`JYG 0:X GJ-trr Wasteflow (MGD) S4 l'%t Summer/Winter (circle one) 11111111111111111111111111 iui IMIIIIIIIMMISIMINVI nimummummumiumummummtimmEmil immlimommummimminummis anommummommummummiumn IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIMIIIIMIIIIIIIIIIIIMIMININIMIIMHI IIIIMMINIIIIIIIMIIMMINIMININIMPIIIIMNINIMINIIIIIIIMPIIIIIIIIIPPORNIII 111111111111111101111111111111111111111111111111111110111111111111111111111111111111111111111111111111111111111 MUTIMIIIIIIMINUMUll MMIIIIIIIIIIIIIIIIIIIIIIIEMIEIIIMIIIIIIIIIIMIIIIIIIIIIIRIIIIIIIIIMMI IIIMMIIMMINIIIIMIMMEMEMMINMEIMMEIMUMMO IIIIIIIIIMIIIIIIMIIIIIIIIMIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIMIIIIMMMIIIMIIIIIUII NIMMEMEMMIMMENNOMIIIIIMIIIIMMINE 1111111111NIINIIIIIIIIIIIIMMI111111111111111111111111. 1111 ill EME11111001116910 Mum" NE NH3-N (mg/1) Potential effluent limit. combinations: BOD5 NH3-N 2 (So) l 6? { z 3 (Se) ''i 7 (76. s) C/3(v6 A181V =?5 r /, (tiN3 : 16.7��/�/ la G N,Bup _ /15 (,c. T OXICS REVIEW 05/07/92 ver 3.0 Facility: TOWN OF FOREST CITY NPDES Permit No.: NC0025984 Status (E, P, or M): E Permitted Flow: 5.00 mgd Actual Average Flow: 1.99 mgd Subbasin: '030802 Receiving Stream: SECOND BROAD RIVER Stream Classification: WS-III 7010: 47.00 cfs IWC: 14.2 % PRE THE ATM ENT DATA EFFLUENT DATA --- ACTUAL ACTUAL PERMITTED 1 or Ind. + Ind. + 1 ACTUAL Default ACTUAL Domestic PERMITTED Domestic I Maximum Standard Acute I Removal Allowable Domestic Industrial Total Industrial Total 1 Daily Pollutant AL Criteria 1 Eff. Load Load Load Load Load Load 1 Value (ug/1) (ug/1) 1 % (#/d) (#/d) (1/d) (#/d) (#/d) (#/d) 1 (ug/1) Cadmium S 2.0 1.79 1 92% 6.75 0.02 0.14 0.16 0.13 0.150 1 19.00 Chromium S 50.0 984 1 76% 56.25 0.02 0.14 0.16 1.12 1.140 Copper AL 7.0 9.2 1 82% 10.50 0.10 2.00 2.10 2.25 2.350 1 1260.00 Nickel S 25.0 789 1 32% 9.93 0.04 0.28 0.32 0.27 0.310 1 125.00 Lead S 25.0 34 1 81• 35.53 0.03 0.40 0.43 3.66 3.690 1 70.00 Zinc AL 50.0 65 1 77% 58.70 0.90 2.65 3.55 6.38 7.280 1 480.00 Cyanide S 5.0 22.0 1 591 3.29 0.01 0.57 0.58 0.11 0.120 1 100.00 Mercury S 0.012 2.4 1 86% 0.02 0.00 0.01 0.01 0.00 0.001 1 Silver AL 0.060 1.2 1 94% 0.27 0.02 0.14 0.16 0.22 0.240 1 Selenium S 5.0 20 1 804 6.75 Arsenic S 50.0 360 1 80% 67.50 Phenols S 1.0 1020 1 99% 27.00 0.20 3.76 3.96 14.15 14.350 1 39.00 ANALYSIS Monitor / Limit / Special Condition' 1 Allowable Allowable) Predicted Predicted 1 I Effluent Effluent 1 on ACTUAL on PERMIT. Actual Actual 1 INSTREAM MONITORING Bkg 1 Conc. Conc. 1 Influent Influent 1 ACTUAL PERMITTED Daily Max. Wk. Avg. 1 Based on Based on Pollutant Conc. 1 CHRONIC ACUTE 1 Data Data 1 Influent Influent Effluent Effluent 1 Actual Actual (ug/l) 1 (ug/l) (ug/1) 1 (uq/1) (ug/1) 1 Loading Loading Data Data 1 Daily Max. Wk. Avg. Cadmium S 1 14.129 12.645 1 0.769 0.721 1 Monitor Monitor Limit 1 Monitor Chromium S 1 353.226 6953.745 1 2.308 16.442 1 Monitor Copper AL 1 49.452 65.135 1 22.716 25.421 1 Monitor Monitor Special 1 Monitor Nickel S 1 176.613 5573.903 1 13.077 12.668 1 Monitor Monitor Limit 1 Monitor Lead S 1 176.613 238.639 1 4.910 42.134 1 Monitor Limit Limit 1 Zinc AL 1 353.226 459.476 1 49.069 100.625 1 Monitor Monitor Special 1 Monitor Cyanide S 1 35.323 155.419 1 14.291 2.957 1 Limit Monitor Limit 1 Monitor Mercury S 1 0.085 16.955 1 0.067 0.008 1 Limit Monitor Silver AL 1 0.424 8.689 1 0.577 0.865 1 Monitor Monitor Selenium S 1 35.323 141.290 1 0.000 0.000 1 I Arsenic S 1 353.226 2543.226 1 0.000 0.000 1 I Phenols S 1 7.065 7205.806 1 2.380 8.624 1 Monitor Monitor Limit 1 Monitor