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HomeMy WebLinkAboutNC0034754_Wasteload Allocation_19941202NPDES DOCUHEN'!' :;CwNIhr!M' Cnpj'A Swirrril NPDES Permit: NC0034754 CommScope WWTP Document Type: Permit Issuance Wasteload Allocation' ''A .,p:Exil.Cr.':!x_c.. _...:e;v;-r: ':.:,.rr:S;•.'.':'"p�'R'•n. Authorization to Construct (AtC) Permit Modification Complete File - Historical Engineering Alternatives (EAA) Correspondence Owner Name Change Instream Assessment (67b) Speculative Limits Environmental Assessment (EA) Document Date: December 2, 1994 This document ios printed omit reuse paper - ignore auy --�^--� ^-* the re-srer+se aside Q 49. , 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: Comm / Scope, Incorporated NC0034754 100 % Domestic [pipe 001] Existing Renewal 001: unnamed tributary Terrapin 002: Terrapin Creek tributary @ WS IV 03-08-32 Catawba Mooresville Robson 12/2/94 E 14 NE Request # B8099 100 % Industrial [pipe 002] Creek - below dam nr Murray's Mill Lake @ NC boundary Stream Characteristic: 001 002 USGS # 02.1425.3378 Date: 1992 1990 Drainage Area (mi2): 0.3 0.26 Summer 7010 (cfs): 0.0 0.06 Winter 7010 (cfs): 0.05 0.1 Average Flow (cfs): 0.3 0.29 3002 (cfs): 0.1 0.12 WC (%): 19 % Existing WLA checked: Staff Report: Topo checked: USGS Flows confirmed: IWC Spreadsheet: Stream Classification: Nutrient Sensitivity: Instream Data: x x Authorization to Construct 1977: modeled w/ Secondary Limits recommended and 200 / 100 ml fecal coliform 1980 reissued w/ Secondary Limit and 1,000 / 100 ml fecal coliform for discharges of 0.01, 0.015 and 0.025 mgd. The 0.025 mgd would have a 3.0 mg/I dissolved oxygen limit. There were many discrepancies on the s7Q10 during this renewal, the final WLA has a 0 cfs designation. 1982: recommendations for a 0.006 mgd discharge and 0 cfs s7Q10 were Secondary Limits w/ a 5.0 mg/l dissolved oxygen and 1,000 / 100 ml fecal coliform 1985: re -modeled for various discharge rates; "Revised limits based on assumption that runoff flow is not evenly incremented downstream, as previously assumed. Because of low design flow, model is very sensitive to runoff inputs." [written on Fact Sheet]. Recommended limits were 16 (30) mg/l BOD5, 5 (-) mg/I NH3-N, 6 mg/l dissolved oxygen, 30 mg/l TSS, 1,000 / 100 ml fecal coliform, 6 - 9 SU pH for discharges of 0.016, 0.017, 0.020 mgd. 1'987: facility currently had 0.06 mgd discharge from septic tank with sand filter facility; the proposal was for a package plant to discharge 0.020 mgd. The recommended limits were the same as 1985 along with: "Limits based on Division procedure for discharges to streams with 7010 s 0 and 3002 > 0. Region must notify discharger that the next permit will have summer / winter limits of 5 & 2 / 10 & 4." 1991: Staff Report indicated that five contact cooling water discharges existed which discharge via three storm drains into a lake owned and maintained by Comm / Scope, and into two natural drainage ditches. 001: recommended limits of 16 (30) mg/l BOD5, 1 (4.3) mg/I NH3-N, 6 mg/l dissolved oxygen, 30 mg/I TSS, 200 / 100 ml fecal coliform, 6 - 9 SU pH, monitor temperature and residual chlorine for discharge of 0.020, [previous requirement to meet Advanced Tertiary limits rescinded] 002 - 004, 006: modeled with limits of 5 mg/1 BOD5, 19 mg/I TSS, 6 - 9 SU pH, 29 mg/l Oil & Grease, and temperature language; these limits were based on 40 CFR 463.12 (BAT a BPT). Also included in these recommendations were chronic toxicity at 90 %. A good map for these locations exists in the WLA for 002. 005: this pipe did not discharge from Comm / Scope, but from Alumax; the request was therefore rescinded 1992: Staff Report indicates that the "receiving stream for discharges 002, 003, and 004 is a pond owned and operated by Comm / Scope. The stream discharge for 001 is the release from the pond." This report also indicated that two of the contact cooling water discharges were, in fact, storm water runoff and would be dealt with in a stormwater application. A memorandum dated June 2,1993 changed the flows for outfall 002, [contact cooling water] and therefore the toxicity test; 19 % IWC. Facility extrudes plastic over copper plated aluminum wires for cable television, (co -axial cable). DMR•s Numerous violations of various parameters over last two years; as noted in Staff Report, facility has recently had trouble complying w/ Permit limits. Residual chlorine for outfall 001 very high ! Pipe 002 has chronic toxicity test at 19%; they've Passed once out of 13 tests) Instream Monitoring; indicates evidence of supersaturation both up and downstream. Staff Report A to C Report indicates current facility will be expanded, (additional 0.020 mgd) for additional treatment capability, (i.e flow equalization, aearation, and clarification). Region recommended issuance to build. i Exlstlna J.lmits; Wasteflow (MGD): BODE (mg/I): NH3N (mg/1): Dissolved Oxygen (mg/I): Total Suspended Residue (mg/I): Fecal Coliform (/100 ml): pH (SU): Residual Chlorine (µg/I): Oil & Grease (mg/l): TP (mg/1): TN (mg/l): Temperature (° C): There shall be no discharge of floating solids or visible foam in other than trace amounts. * The temperature of the effluent shall be such as not to cause an increase in the temperature of the receiving stream more than 2.8 ° C and in no case cause the ambient water temperature to exceed 32 ° C. ** Monitor requirements only apply if chlorine is added to the cooling water. There shall be no chromium, zinc, or copper added to the treatment system except as pre -approved additives to biocldal compounds. 001 Averages Winter Monthly Summer 0.020 16 1 6 30 200 6-9 monitor not required not required not required monitor 002 003 004 Daily Maximum monitor monitor monitor 5 19 6-9 6-9 6-9 monitor monitor ** monitor ** monitor not required 29 not required not required monitor monitor * monitor * 30 4.3 6 30 200 6-9 monitor * Pipe 002: Chronic (Ceriodaphnia) Quarterly Toxicity Test at 19% : February, May, August, and November Upstream Location: Downstream Location: Parameters: approximately 50' above discharge approximately 100' below discharge temperature, dissolved oxygen, fecal conform, conductivity i • ;r •!7 OWDAANGLE IOUt0.. uI t. n 'RP •91• • Primary highway. hard surface . • 1 ..3 GOvt...t•t M . °fllce E.1.—ua—OWr ' ROAD CLASSIFICATION Light duty road, hard or improved surface Secondary highway. hard surface OInterstate Route 0u. S. Route °State Route �t7 Co�,1/ c'3c IV. Aty N(..oc 4154 E14NE E6 002 c.o NTract cov I1 H "" 003 sr octet f iZ0 001 - 1O0 % dorie*tic, et04 3-*012,0.. H Zb „14 35' 37'30" 81 00' y�pA�4 4 Unimproved road CATAWBA, N.C. N3537.5—w8100/7.5 1970 AMS 4755 II NE -SERIES Vaal tIJc 11)c1trt_ \oLA 5 oC IvMl&t w( dE4T „sr t/u 5'rfif i3ttr-S ti7K EAU-- R a L . • 0341 z 31 .7,7471r rrl) ./1.15 ill/ 6,rjrxf el: 4Olow4.I Of: /•yeh -elf .vs.,4. — -WV it ps<n.J•h 7�a., d--1.7•— o• .ate Q,.•o. . ' o./.S — eV. yu 3W . O. ruS •vy WHOLE EFFLUENT TOXICITY TESTING 01SELF-MONITORING SUMMARY) Mon, Dec 19. 1994 FACILITY RFOI IIRFMFNT YEAR JAN APR BIN Al rv-r ifININk COLONIAL PIPELINE/005 PERM: 241IR LC50 AC MONIT HIED (GRAB) NC0031046N05 Begin:3/1/92 Frequency: A NonComp: County:GUILR)RD Region: WSRO Subbasin: CPFOS PF: NA Special 7Q10: 0.0 IWC(%):100.0 Order. 90 - 91 NONE' 92 - 93 >1001 04 - - - NONE - - - - >1001 - >1001 - - - - - >90,>90 - - - - - - - - - - - - -• - - - - - - - - - - - >90 - - - - Nov - - - - - COLONIAL PIPE'I.INE /006 PERM: 241112 LC50 AC MONK Fri ID (GRAB) NC00310461006 Begin:3/1/92 Frequency: A NonComp: County: GUIEIORD Region:WSRO Subbasin:CPF08 PE: NA Special 7Q10:0.0 IWC(%):100.0 Order: 90 - 91 - 92 - 93 - 94 - - - - - - - - - >1001 - - - - - - - - - - - - - >901 - - - - - - - - - - - - - - - - • - - •- - - - - - - - - - - COLUMBUS WWTP PERM CIIR LIM:37% NC0021369/001 Begin:3/1/94 Frequency: Q P/F A MAR JUN SEP DEC NonComp:SINGLE County:POLK Region: ARO Subbasin: BRD02 PE:0.8 Special 7Q10:2.1 IWC(%):37.08 Order Y 90 P20,FAIL 01 FAIL 92 - 93 - 94 - - FAIL - - - 8.9.FAIL FAIL PASS PASS PASS 35',FAIL PASS - - - - PASS - - - NONE*,P PASS PASS PASS PASS NONE'P - - - - NONE P - - - - >90,PASS FAIL LATE,PASS PASS LATE >90'PASS PASS - - PASS LATE PASS - - bt PASS PASS PASS COMM/SCOPE, INCJ002 PERM CIIR LIM:19% NC0034754/002 Begin:8/1/93 Frequency: Q P/F A FEB MAY AUG NOV NonComp:SINGLE County:CATAWBA Region:MRO Subbasin:CTB32 PF: 0.0075 Special 7Q10:0.05 IWC(%):19.0 Order. 00 - 91 - 02 - 93 - 94 FAIL - - - - FAIL - - - - FAIL - - - - FAIL - - - - FAIL - - -- - FAIL - - - - PASS - - - FAIL FAIL - - - LATE FAIL - - - FAIL - - - - FAIL - - - FAIL ('(>N('11RD ROCKY RIVER WWII' l'IiRM P•2 CIIR I.IM:7396 N('0)Ie20'1AX11 lkgin: NINO I`v ionay: (J 1'A' A AI II; NOV ICU MAY Non('ouq,:A>8('bV County:CABARRUS Region: MRO Subbasin: YAD12 PF:24.0 Special 7Q10: 14.0 IWC(%):72.62 Order: Y 00 - Di PASS 92 - 93 - 94 81.5 PASS I'AS9 81.1 PASS FAIL - --- - - LATE - --- - - >99,>99 PASS PASS 04.4 PASS >99 - -•- - - - - ... - - - PASS PASS PASS PASS >99 - - - - - - -- - - - LATE PASS PASS FAIL 81.08 bl -- - >99.0 CONE MILLS - CLUFSIDE PERM CHR LIM:4.2% NC0004405/OOl Begin:4/1/94 Frequency: Q P/F A JAN APR JUL OCT NonComp:SINGLE County:RUTIIERFORD Region: ARO Subbasin: BRD02 PP':1.75 Special 7Q10: 62.10 LWC(%):4.19 Order: 90 PASS 91 PASS 92 PASS 93 FAIL 94 PASS - - - PASS - - - - - - PASS PASS PASS PASS PASS - - - - - - - - - - bt PASS PASS PASS PASS - - - - - PASS - - - - NR FAIL LATE PASS PASS PASS - PASS - - PASS, - - CUNIi MILLS GRIiENSBUR0-001 PIiRM C11R 1.IM:79% NC0000876/OOL Begin:10/1/93 Frequency: Q P/F A MAR JUN SEP DEC NonComp:SINGLE County:GUILFORD Region: WSRO Subbasin: CPF02 PF: 1.25 Special 7Q10: 0.46 IWC(%):79 Order Y 00 FAIL 01 FAIL 92 FAIL 83 - 94 79.3 - - - - 81.94 - bt PASS FAIL NI FAIL LATE - FAIL - - PASSSIG FAIL FAIL 81.95 LATE FAIL -- 18.0 55.8 FAIL PASS PASS 18.0 27.93 - - - - 27.93 PASS PASS FAIL 18.0 27.96 - - - 63.0 FAIL,27.03 - - - 63.0 NI FAIL NFVPASS 83.0 CONOCO, INC. GREENSBORO TERMNL PERM:48 IIR AC MONIT EPIS NC0074578/001 Begin:6/1/90 Frequency: 5 OWD A NonComp: County:GUR-RORD Region: WSRO Subhasin: CPF08 I'I:.0067 Special 7Q10:0.00 IWC(%):100.00 Order. 00 - 01 >90>90' 92 - 93 >90• 94 >90.0 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - >90.>90 - - - - - - - - NONE - - - CONOCO. INC.- CIIARLOTIE PRODS. PERM:24 IIR AC MONIT EPIS PAID (GRAB) NC0074705/001 Begin:9/I/93 Frequency: S OWD/A NonComp: County: ME.CKEENBURG Region: MRO Subhuin: CI1334 I'F:0 Special 7QI0:0 IWC(%):100.0 Order. 90 - 91 - 92 - 03 - 94 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - >1001 - - - - - - - - - >1001.>1001 - - - >1001.>1001 CUNOCO/SI'LMA PRODUCTS TERMINAIJ001 PERM: 241IR 1.C50 AC MONIT EPIS Fri ID (GRAB) NC00S2311/001 Begin:2/28/14 Fngo>wy: 5 OWD/A NonComp: ('ouniy:luIINS'IY1N Itrgiun: Rltu Subbumn. N11102 I'I':- Special 7QI0:0.0 IWC(%):100.0 (),der 90 - 91 •- 02 ••• 1)3 -. 04 •- - - •-• -.. - - - ... - - - ._ -- - - - - - - - - - - - - - - ... - - - ... - - .- ._ >IOOISIG - ..• - - - ... 0 2 consecutive failures = significant noncompliance Y Pre 1990 Data Available IJ°7 II4D: PERM = Permit Requirement IJs 1' = Administrative Letter - Target Frequency = Monitoring frequency: Q- Quunerly; M- Monthly; BM- Bimonthly; SA- Semiannurdly; A- Annually; OWD- Only when discharging:1)- Discontinued monitoring requirement; IS- Conducting independent study Begin = First month moulted 7Q10 = Receiving stremn low Bow criterion (cfs) A = quarterly monitoring increases In monthly upon single failure Months that testing mull occur - es. JAN,APR,IUL,O(:I' NonComp = Current Compliance Requirement PI:. Permitted flow (MCI)) IWC% = Inooro s waste concentration PAP = Pass/Fail chronic test AC = Acute CIIR = Chronic Data Notation: f . Fathead Minnow: • - Ccriodaohnia sp.: my - Mvsid shrimp: ChV - Chronic value: P • Mortality of stated ncreentaae at highest concentration; at - Performed by DEM Tox Eva/ Group: bt - Bad test Reporting Notation: --- = Data not required; NR • Not reported; ( ) • Beginning of Quaver Facility Activity Status: 1 - Inactive. N • Newly Issued(To construct); 11 - Active but not discharging; t-Morc data available for month in question SIG = ORC sig natum needed 13 • Comm / Scope. Incorporated NC0034774 Upstream: 25' above discharge Month Temp DO Saturation Fecal Conductivity Nov-94 Oct 94 Sep-94 Aug-94 Jul-94 Jun-94 May-94 Apr-94 Mar-94 Feb-94 Jan-94 Dec-93 17 13 14 16 21 28 17 14 8 6 5 8.1 6.2 3.1 6.0 5.5 9.3 10.9 10.3 10.9 10.9 10.9 84% 59% 30% 61% 62% 119% 113% 100% 92% 87% 85% 0% 24.7 23.5 3.5 12.9 20 280 15.5 12.7 <5 8.7 6 44 59 37.8 47.8 42 62 48.8 46.5 45.8 5.1 32.5 Downstream: 100' below discharge Temp DO Saturation Fecal Conductivity 17 12 16 18 21 26 16 14 8 6 5 8.7 7.9 5.1 6.4 5.5 9.5 10.5 9.5 10.7 10.4 10.5 90% 73% 52% 68% 62% 117% 106% 92% 90% 83% 82% 0% 57.8 17.3 <2 8 38.8 480 <5 32.1 18.6 9 31.6 211 264 273.8 294.7 68 122 192.7 196 153.3 180.5 96.5 Ammonia [2 / 4 mg/II - Residual Chlorine - Fecal Conform Instream Waste Concentrations Residual Chlorine 7010 (cfs) Design Flow (mgd) Design Flow (cfs) Stream Std WA) Upstream bkgrd level (µg/I) IWC (%) Allowable Concentration (µg/1) Allowable Concentration (mgli) Fecal Umh Ratio of 0.0 :1 0.0 0.02 0.031 17 0 100.0% 17.0 0.017 200/10om1 0.0 0.02 0.031 1 0.22 100.0% 1.0 0.1 0.02 0.031 1.8 0.22 38.3% 4.3 Ammonia as NH3 (summer) 7010 (cfs) Design Flow (mgd) Design Flow (cfs) Stream Std (mg/1) Upstream bkgrd level (mgll) IWC (%) Allowable Concentration (mg/i) Ammonia as NH3 (winter) 7010 (cfs) Design Flow (mgd) Design Flow (cfs) Stream Std (mgA) Upstream bkgrd level (mg/i) IWC (%) Allowable Concentration (mg4) 1/26/95 Page 1 Note for Farrell Keough From: Greg Nizich Date: Feb 1, 1995 7:22 AM Subject: RE: SOP To: Farrell Keough The tracking system shows this one has not come in for renewal yet, so they missed their 180 day deadline. Their are a few guidelines that apply to CCW - some are in the metal forming area (CFR 471, 467), another is plastics forming (CFR 463). I'm sure there are others. This permit is not on my preassignment list, so It won't be coming my way. Dave may know who it will go to. From: Farrell Keough on Tue, Jan 31, 1995 3:43 PM Subject RE: SOP To: Carla Sanderson; Greg Nizich okay,... this is for Comm / Scope, Inc NC0034754 and I will need to request data from the Engineer if he has it, or from the facility itself. In short, this Permit may not be able to make the Basin Schedule for Catawba 32. From: Carla Sanderson on Jan 31, 1995 3:39 PM Subject: RE: SOP To: Farrell Keough Farrell - this should be treated like industrial dischargers. The SOP does not give guidance on each type of industrial discharge. The wasteflow should be evaluated for types of contaminents and determination should be made on limits or monitoring for each. From: Farrell Keough on Tue, Jan 31, 1995 3:34 PM Subject: SOP To: Carla Sanderson do we have a section that deals w/ contact cooling water ? I couldn't find anything Page 1 Note for Farrell Keough From: Matt Mathews Date: Jan 27, 1995 4:42 PM Subject: RE: Troutman WWTP To: Farrell Keough Troutman: Appears to have at least two sources of toxicity, one being chlorine. Region has begun an enforcement action. Should be hearing something on it soon. We see no reason to change their permit limit. Let me know if you think another type of limit would be appropriate. Comm/Scope: Definitely has a toxicity problem. Does NOT appear to be related to total dissolved solids. Given that this is a plastic extrusion outfit, I suspect the problem to be an organic chemical. Again, region has begun an enforcement action. Facility asked for remission, region responded. I'm not sure what the status of the EA is at this time. Same comment as above regarding permit limit. From: Farrell Keough on Thu, Jan 26, 1995 9:25 AM Subject: Troutman WWTP To: Matt Mathews NC0026832 they've had problems in past and don't look to have a great record currently... could you let me know what the ESB position is on this facility. thanks. To: Permits and Engineering Unit Water Quality Section Date: April 6, 1994n end-i••yt•-.14.4. sA N r AUTHORIZATION TO CONSTR6CT •.w' .. , NPDES PERMIT dam" "V REPORT AND RECOMMENDATIONS �,,,, County: Catawba APR 81oc: Permit No. ACC034754 LSZirPOia Rawl PART I - GENERAL INFORMATION .7 „ "•..IF ...r i.. ems+-�-.�. • . 1. Facility and Address: CommScope, Inc. Post Office Box 199 Catawba, N.C. 28609 4 . 2. Date of On -Site Investigation (if conducted): N/A 3. Report Prepared By: Michael L. Parker, Environ. Engr. II 4. Persons Contacted and Telephone Number: N/A 5. Verified Discharge Point(s), List for All Discharge Points: Latitude: 35° 38' S7" Longitude: 81° 01' 52" Attach a USES map extract and indicate treatment facility site and discharge point on map. Ensure discharge point(s) correspond to NPDES permitted discharge points. USES Quad No.: E 14 NE 6. Size (land available for expansion and upgrading): Ample area is available for the construction of the proposed WWT facilities. 7. Topography (relationship to flood plain included): The WWTP site is not located in a flood plain. 8. Location of Nearest Dwelling: None within 1000 feet of the site. PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS 1. Type of Existing Treatment Facility: The existing WWT facilities consists of flow equalization followed by a flow measuring device, aeration, clarification, disinfection, tertiary filtration and sludge digestion. 9 Page Two 2. Type of Proposed Treatment Facility: The permittee proposes to modify the existing WWT facility by installing a 5000 gallon flow equalization tank, two (2) 5000 gallon aeration tanks, a 3000 gallon clarifier, 1,650 linear feet of 3 inch gravity sewer and a second aerated sludge digester. This will increase the facility's design capacity to 0.020 MOD. 3. Sludge Handling and Disposal Scheme: Sludge is removed by a tanker truck and transported to a City of Hickory WWTP for disposal. 4. Treatment Plant Classification (attached completed rating sheet): Class II 5. SIC Code(s): N/A Wastewater Code(s): Primary: 02 Secondary: Main Treatment Unit Code: 05107 PART III - EVALUATION AND RECOMMENDATIONS The permittee request approval to construct the proposed WWT treatment facilities identified in Part II, No. 2. Approval of these facilities will effectively modify the WWT facilities contained in the ATC issued to CommScope on February 14, 1991. CommScope's change in engineering consultants which resulted in a subsequent change in process design concerns and prompted the subject ATC request. This facility has established a recent history of compliance problems further stimulating the need for the proposed WWTP modifications. According to the permittee's engineer, the proposed modifications will add more flexibility to the operation of the WWT system as well as increase plant capacity. This Office has no objection to the construction of the proposed facilities and recommends the request for an ATC be approved pending a favorable technical review by P&E. Signature of Report Preparer Water Quality Regional u ervisor Date RATING SCALE FOR CLASSIFICATION OF FACILITIES Name of Plant: 67144.K. Owner or Contact Person: cA LSo3.#J CO Mailing Address:_ P C7. 64,x /99 Go. >cf.k,d4, 7i. c, Z 860, County: 1 .4)`*v6,9 Telephone: 7011- Z Cl/-3/V2 NPDES Permit No. NC00 34/,2,5 f Nondisc. Per. No. IssueDate: Expiration Date: Existing Facility i' S New Facility Rated By: /l1• �.. Date: 9fV0f<0, Reviewed (Train. & Cert.) Reg. Office Reviewed (Train. & Cert.) Central Office ORC Grade POINTS • ITEM Industrial Pretreatment Units and/or Industrial Pretreatment Program (see' definition No. 33) DFSIGN FLOW OF PLANT IN GPD (not applicable to non -contaminated cooling • waters, sludge handling facilities for water purification plants. totally closed cycle systems (def. No. 11). and facilities consisting only of Item (4) (d) or Items (4) (d) and (11) (d)) 0 » 20.000 20,001 -- 50,000 50.001 — 100,000 100.001 — 250,000 250,001 -- 500.000 • 500.001 •-1.000,000 1.000.001 -- 2.000,000 2.000.001 (and up) - rate 1 point additional for each 200,000 gpd capacity up to a maximum of 30 Design Flow (gpd) : Z01 ov c.; POIN (4) PRIMARY TREATMENT UNITS (a) Septic Tank (see definition no. 43) 4 (b) Imhoff Tank (c) Primary Clarifiers (d) Settling Ponds of Settling Tanks for Inorganic Non -toxic Materials (sludge handling facilities for water purification plants, sand, gravel, stone.' and other mining operations except recreational activities such as gem or gold ©mining) (5) SECONDARY TREATMENT UNITS 2 (a) Carbonaceous Stage 3 (i)Aeralion - High Purity Oxygen System 4 Diffused Air System 5 Mechanical Air System (fixed, 8 floating or rotor) 10 Separate Sludge Reaeration (ii) Trickling Filler High Rate Standard Rale Packed Tower (iii) Biological Aerated Filter or Aerated Biological Filler (iv) Aerated Lagoons (v) Rotating Biological Contactors . . (vi) Sand Filters - intermittent biological 2 recirculating biological 3 (vii) Stabilization Lagoons (viii)Cla rifle r (ix) Single stage system for combined carbonaceous removal of BOD and nitrogenous removal by nitrification (see def. No. 12) (Points for this item have to be In addition to items (5) (a) (i) through (5) (a) (viii) (x) Nutrient additions to enhance BOD removal (xi) Biological Culture ('Super Bugs') addition to enhance organic compound removal (3) PRELIMINARY UNITS (see definition no. 32) (a) Bar Screens or (b) Mechanical Screens, Static Screens or Comminuting Devices (c) Grit Removal Of (d) Mechanical or Aerated Grit Removal (e) Flow Measuring Device or (I) Instrumented Flow Measurement (g) Preaeration (h) Influent Flow Equalisation (i) Grease or Oil Separators • Gravity Mechanical Dissolved Air Flotation. (1) Prechlorination 2 1 2 1 (I) 3 5 2� 1 1 1( 11 1( 8 5 5 ( I,ozc o ov►s 4 (i) Aeration - High Purity Oxygen System Diffused Air System Mechanical Air Systam (fixed. floating, or rotor) Separate Sludge Reseration Trickling Filter - High Rate Standard Rate Packed Tower (iii) Biological Aerated Fitter or Aerated Biological Fitter (iv) Rotating Biological Contactors (v) Sand Filter. intermittent biological recirculating biological (vi) Clarifier w _ 2 0 (i) Sludge Holding Tank - Aerated 5, , 10 i Non -aerated ? " (j) Sludge Incinerator - {not including activated 8 ' carbon regeneration) 10- (k) Vacuum Filter. Centrifuge or Filter Press or other . similar dewatering devices id 7 5 5 10 10 2 3 •5 (6) TERTIARY OR ADVANCED TREATMENT UNIT (a) Activated Carbons Beds - without carbon regeneration 5 with carbon regeneration 15 (b) Powdered or Granular Activated Carbon Feed - without carbon regeneration 5 with carbon regeneration 15 (c) Air Stripping 5 (d) Denitrification Process (separate process) 10 (e) Electrodialysis N 5 (1) Foam Separation 5 (g) Ion Exchange 5 (h) Land Application of Treated Effluent (see definition no. 22b) (not applicable for sand. gravel. stone and other similar mining operations) .11i) on agriculturally managed sites (See def. No. 4) 10 (ii) by high rate infiltration on non -agriculturally managed sites (includes rotary distributors and similar fixed nozzle systems) 4 (ili) by subsurface disposal (includes tow pressure pipe systems and gravity systems except al plants consisting of septic tank and nitrifica- tion lines only) • 4 Microscreens 5 Phosphorus Removal by Biological Processes (See def. No. 26) (k) Polishing Ponds - (I) (i) U) (m) (n) (o) (p) Post Aeration - Ci) 20 2 5 0 5 Reverse Osmosis . 5 Sand or Mixed -Media Filters - low rate high rate Treatment processes for removal of metal or cyanide 15 Treatment processes for removal of toxic materials other than metal or cyanide 15 (7) SLUDGE TREATMENT (a) Sludge Digestion Tank • Heated . 1 Aerobic ...... Unheated (b) Sludge Stabilization (chemical or thermal) 5 (c) Sludge Drying Beds - Gravity Vacuum Assisted without aeration with aeration cascade diffused or mechanical . (d) Sludge Elutriation (e) Sludge Conditioner (chemical or thermal) (1) Sludge Thickener (gravity) (g) Dissolved Air Flotation Unit (not applicable to a unit rates as (3) (i) (h) Sludge Gas Utilization (including gas storage) ... 2 5 5 5 (8) SLUDGE DISPOSAL (including incinerated ash) (a) Lagoons 2 (b) Land Application (surface and subsurface) (see definition 22a) -where the facility holds the land app. permit ... 10 •by contracting to a land application operator who holds the land application permit 2 •land application of sludge by a contractor who does not hold the permit for the wastewater treatment facility where the sludge is generated 10 (c) Landlilled (burial) 5 (9) DISINFECTION (a) Chlorination (b) Dechlorination (c) Ozone 5 (d) Radiation 5 (10) CHEMICAL ADDITION SYSTEM (S) (See definition No. 9) (not applicable to chemical additions rated as item (3) 0). (5) (a) (xi). (6) (a), (6) (b). (7) (b). (7) (e), (9) (a), (9) (b). or (9) (c) 5 points each: List: (11) MISCELLANEOUS UNITS (a) Holding Ponds. Holding Tanks or Settling Ponds for Organic or Toxic Materials including wastes from mining operations containing nitrogen and/or phosphorous compounds in amounts significantly greater than is common for domestic wastewater 4 (b) Effluent Flow Equalization (not applicable to storage basins which are inherent in land application systems)2 (c) Stage Discharge (not applicable to storage basins inherent in land application systems ,S 5 5 5 (d) (e) Stand -By Power Supply.....N... N... N.NN.NN.NN..... 1 (1) Thermal Pollution Control Device Class I. TOTAL POINTS CLASSIFICATION NM.. ..... CtasSII..N..N.NNN«...N.NNN.....N.....N.. NN.N de es ClassIII.........N..N....NNN.....N.....yNN...y.N.N.. Class IV. .NNN..N. 5 - 25 Points 26- 50 Points 51- 65 Points 66• Up Points Facilities having a rating of one through lour points. inclusive. do not require a certified operator. Classification of all other facilities requires a comparable grade operator in responsible charge. Facilities having an activated sludge process will be assigned a minimum classification of Class I1. Facilities having treatment processes for the removal of metal 5 or cyanide will be assigned a minimum classification of Class iI. 5 3 8 Facilities having treatment processes for the biological removal 2 of phosphorus will be assigned a minimum classification of Class' III.