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HomeMy WebLinkAboutElectric Work Card j Electric Permit Work Card Permit Number 0 Create Date 3/17/2003 " Job Address 1670 S MAIN ST Owner CITY OF OSHKOSH Service b New 0 Change 0 Temp Volts Circuits Contractor UNKNOWN???? . - ~/A_~ Type 0 Overhead 0 Underground . N/A o Luminaires 0 Value $0.00 Amps Use/Nature of Work o Switches 0 Receptacles 0 653 - Industrial-Addition/Remodels COMM/ Replace Hastings make-up air unit. I I i I ~ Inspections: Date Type Inspector DatelTime requested: Access: Requested by: o Reinspect Fee 0 Fee Wavied Notice Type: Ready DatelTime: Phone Number: o Reinspect Fee Paid I " Mar.24. 2003 1 :04PM Oshkosh Wastewater Trtmnt Plant No.3783 p. 1/3 Wastewater ireatment Plant ,to, Phone: (920) 232-5365 Fax: (920)232-5366 Shipping Address: 233 N. Campbell Rd. Oshkosh. WI 54902-3488 Billing Address: P.O. Box 1130 OShkosh, WI 54903-1130 DATE: . 3);7")>3 . I!t--v/;<) 8C7vN6r( d~ (-7C) 55 TO: . COMPANY: INSP&-C77a>U $euces FAX NUMBER: d3 b -- S1J1f Y NUMBER OF PAGES (INCLUDING COVER PAGE): '3 FROM: .--.--- /Cw-t ~{/:2/~ r RE.FER~NCE: fi {'/-;J. S~ P-l4?~/,J 4..cr ~/?tJx..! ~EMARKS: 411.1 ~9/ ...va;-li/~ C r "'-ooJ::::s ~/KC'. ~y ; SOC//4.C&~ TO AG.c~{//~rc:- 7r//-S ~06(.C'?77. /76uJevcR., f Co,dd./'C PV/rH 71/e' "p?.es;r- ~/'- '),....., :'J~ ~'-" ..s ~d?C/)U~ I r (j'e;</6-V~ ~- ~~ m~pAJ G A P'hC/AJ77Il'nJ aLl r of /-J .#?OLe' ///cc.. PLYI6c~ AW/SC:: ,- 7$N.L:S:: I:\Wastewate"'Form$\General\~..x Cover $heet.doc . i .... Ma r .24. 20..0. 3/ 1..: 04PM . Mar ~~ U~ ld:11a . I Oshkosh Wastewater Trtmnt Plant EMS Sales and En~in~erin, .No.3783 920-354-9023 p. 2/3 p. 1 rlLV' Engineering, L. L. C_ N3774 Fire lol'lll! t. Menosha. WI 54952 Phl'f\e: (920) 954-9000 . FciX (920) 954-9QZ3 3/24/2003 Mr. Tom Kro.zick City of Oshkosh, WI WWTP Superintendent Phone (920) 232-5365 Fax (920232-5366 Dear Mr. Krozick, I am available Wednesday or Thursday this week to meet and tour the site. Let U5 discuss this when you have time. I am not sure that I understand this situation, but if these next two statements are true then there is nothing to be done as it ~hould be grand fathered. In this case we will do nothing and the electrical contractor shQuld hook it up. 1) The location previously incorporated a gas rue make up air unit of similar construction. 2) The space which this unit senres has not changed in any way. General questions: A) Is the bar screen rOOm a soli4s separation area? B) What makes this a classified occupancy? C) Most ofthe waste handling spaces I've done for WWTP's were not e:xplosive atmospheres but we specified poly coated rigid conduit. heavy duty coated condolets and tight coated enclosures to fight against corrosion. Is this what is inside the space? Class I Div 1. is vapor tight and strong to contain an explosion. Vapor tight and long life. D) The make up air unit is probably not Classified, but it might be safe enough, what does the UL label say? E) Is this class A fan and explosion proof motor really required? F) Correctly identify the old equipment? G) lD the new equipment? H) lD the space? I) ID the hazard(s)? J) ID the occupancy? Answering these questions will save time. Although I will certainly wish to vi.sit the site and examine any plans and information available, any up front information your folks can gather will be helpthl and :saVe time. Received Time Mar.H. lO:29AM ~ Mar.24. 2003 1 :04PM Mar. c-. u..:s 1U% .l'la Oshkosh Wastewater Trtmnt Plant EMS ~ale5 and En~ih@ering No.3783 920-954-9023 p. 3/3 p.2 Fee Schedule: Outside consultants shall be cost plus 10%. Professional WitneSs Variances and Petitians Senior HV ACJElectrical ~ngineer Engineer CADD Clerical and Admin $150.00 per hour $125.00 per hour $89.00 per hour $79.00 per hour $49.00 per hour $42.00 per hour I would estimate that the cost of this study and resulting opinion will not exceed $2000.00. Please confirm with your purcbase order. Feel free to call far questions or comments; I hope to. meet with. yo.u this. week to discuss the optiODS and visit the site. (]0 Ai Verkuylen, PE AL V Engineering, LLC Received Time Mar.24. IO:29AM Benner, Kevin From: Sent:, To: Subject: Brand, Stephan Wednesday, May 21,200310:47 AM Benner, Kevin Lift Station Design Requirements Hello Kevin, I just wanted to follow up on the Iiftstation with you. In my research I came across a DNR design requirement in NR 110.14 (3) (b) 5 that requires that in a wet well area ventilation shall have 12 continuos air changes per hour if ventilation is continuos( which is how the unit is set up) and air shall be forced into the wet well rather than exhausted.1 believe this is so we do not pull gasses from the open sanitary sewer into this area by using exhaust ventilation. If you have a concern about the initial start up we can use a portable blower to blow air into this area and use a gas meter to test the atmosphere before we start the unit up to make sure there is not a problem. Please let me know if there is any other information I can provide. Thanks Steve 10: 26 FAX 608.2518655 STHAND ASSOCIATE G--If. D3 141 002 ~ lLevil" ~ih rrbin.tt~ FIRE PROTECTION IN WASTEWATER TREATMENT AND COU~dTION FACILITIES ~ ~ . C;; ~l(ift~ ..!i 04:107/03 , 820-12 Tabl'e 2-2 Collection Systems (Continued) A B C D E F G Material of Fire and NEC-Area Electrical Construction for Fire Location and Explosion Extent of Classification Buildings or Protection Function Hazard Ventilation Classified Area (All Class I, Group D) Structures Measures a SANITARY SEWER Possible igni- NNV Inside of sewer Division 1 In accordan,ce NR Sewer transporting tiun of flamma- with 6--3.1 14 b domestic, commer- ble gases and B Division 2 cial, and industrial floating flam- wastewater mable liquids a COMBINED SEWER Possible igni- NNV Inside of sewer Division 1 In accordance NR Sewer transporting tion of flamma with 6--3.1 15 b domestic, commer- hie gases and B Division 2 cial, and industrial floating flam- wastewater and mable liquids storm water a WASTEWATER Possible igni- A Entire room Division 1 NC, LC, or LFS CGD ~ PUMPING STA- tion of flamma- or space b nON WET VlTELLS ble gases and B Division 2 16 Liquid side of a floating flam- pu~ping sta~on mable liquids servmg a sanitary sewer or combined system a BELOWGRADE OR Buildup of C Entire space Unclassified NC, LC, or LFS FE PARTIALLY vapors from . or room b BELOWGRADE flammable or ( D Division 2, 01" WASTEWATER combustible unclassified, if PUMPING STA- liquids space TJON DRY WELL provided with 17 Pump room physi- pressurization in cally sefarated from accordance with wet we! ; pumping of NFPA 496 wastewater from a sanitary or com- bined sewer system through closed pumps and pipes Note: The NR designation in column C indicates that 110 ventilation requirements are established for the space and, therefore, Table 7-3.1 also has no requirements. A - No ventilation or ventilated at less than 12 air changes per hour B - Continuouslyventilatedat 12 changes per hour or in accordance with Chapter 7 ~ C - Continuously ventilated at 6 air changes per hour or in accordance with Chapter 7 CGD - Combustible gas detection system D - No ventilation or ventilated at less than 6 air changes per hour FDS - Fire deteclion system FE - Portable fire extinguisher LC - Limited-combustible material LFS - Low flame spread material NA - Not applicable NC - Noncombustible material .NEC- In accordance \\,ith NFPA 70, National Elecl1ical Code NNV - Not normally ventilated NR- No requirement 1999 Edition Received Time Apr. 7. 10:42AM , :-, } ~....~.~ ~~ ~ . 87 DEPARTMENT OF NATURAL RESOURCES NR 110.14 Unofficial Text (See Printed Volume). Current through date and Register shown on Title Page. be considered include depth of cover, soil types, loading on pipe, and corrosivity. (e) Nonpressure pipe. All nonpressure Sewer pipe shall have sufficient strength to withstand the loads which will exist. The fol- lowing are minimum standards for nonpressure pipe: I. Asbestos cement pipe and fittings shall meet the require- ments of ASTM C428 (1981); 2. Cast iron pipe and fittings shall be of the commercial grade known as "extra heavy" and shall meet the requirements of AWWA CIOO (1977); 3. Concrete pipe shall meet the requirements of ASTM C 14 (1981), C76 (1982), or C655 (1981); 4. Vitrified clay pipe shall meet the requirements of ASTM C700 (1978); 5. Steel pipe shall meet the requirements of AWWA C200 (1980); 6. Ductile iron pipe and fittings shall meet the requirements of ASTM A746 (1977) or AWWACIOO (1977); 7. Polyvinyl chloride sewer piPie shall meet the requirements of ASTM D3033 (1980), D3034 (1981), or ASTM F679 (1980); 8. ABS composite sewer pipe shall meet the requirements of ASTM D2680 (1980). (0 Jointsjbr nonpressure pipe. The method of making joints and the materials used shall be included in the specifications. Sewer joints shall be designed to minimize infiltration and to pre- vent the entrance of roots. Joint material shall be of such a. com- position as not to be adversely affected by the se\vage. I. Asbestos cement pipe joints shall consist of an asbestos cement sleeve and 2 neoprene or rubber type gaskets. 2. Cast iron pipe joints shall consist of rubber gasket joints or mechanical joints meeting the requirements of AWWA CIOO ( 1977). 3. Rubber gasket joints for concrete sewer pipe shall meet ASTM C443 (1979). 4. Resilient joints for vitrified clay sewer pipe shall meet ASTM C425 (1977). 5. Steel pipe joints shall meet the requirements of AWWA C200 (1980). . . 6. Ductile iron pipe joints shall meet the requirements of AWWA CIOO (1977). 7. Polyvinyl Cl110ride sewer pipe shall be joined by solvent weld joints or by elastomeric joints which have been approved by the department. 8. ABS composite sewer pipe shall be joined by solvent weld joints or by type OR mechanical.--seal joints meeting the require- ments of ASTM D2680 (1980). (g) Pressure sewer pipe and joints. All pressure sewer pipe 10 centimeters (4 inches) or larger shall meet the following minimum requirements: . 1. Asbestos cement pipe and joints shall meet the require- ments of AWWA C400 (1980). 2. Cast iron pipe and joints shall meet the requirements of AWWA CIOO (1977). 3. Ductile iron pipe andjoirits shall meet the requirements of AWWA CIOO (1977). 4. Steel pipe and joints shall meet the requirements of A WWA C200 (1980). 5. Concrete pipe and joints shall meet the requirements of AWWA C300 (1974). 6. Polyvinyl chloride pipe and joints shall meet the require- ments of AWWA C900 (1981) (minimum class ISO) or ASTM D2241 (1980) (minimum class 250). Solvent weld joints may not be used. 7. Fiberglass reinforced-polyvinyl chloride composite pipe and joints shall meet the requirements of AWWA C950 (1981) (minimum class 250). Eight and IO-inch pipe shall bave a mini- mum category 3 stiffness as defined in ASTM D2996. Four and 6-..inch pipe shall have a minimum category 2 stiffness as defined in ASTM D2996 (1977). (h) Small diameter pressure SeH)er pipe and joints. All pipe and joints 8 centimeters (3 inches) in diameter or smaller to be used in grinder pumps shall meet the following minimum require- ments: 1. Polyethylene pipe and joints which meet the requirements of ASTM D2239 (1974) (minimum class 160) may be approved on a case-.by-case basis depending on the expected system pres- sure relative to the pipe working strength. Solvent weld, butt fusion, or elastomeric joints will be acceptable. 2. ABSpipe and joints shall ~leet the requirements of ASTM D2282 (1977) (minimum class 160): Solvent weld or elastomeric joints will be acceptable. 3. Polyvinyl chloride pipe and joints shall meet the require- ments of ASTM D2241 (1980) (minimum class 160). Solvent weld or elastomeric joints will be acceptable. History: Cr. Register, November, 1974, No. 227, eff 12..--!--74; am. (2), Register, December, 1978. No. 276. elf. 1-1-79; r. and recr_ Register, February, 1983, No. 326, eff. 3- J -83; corrections in (I) made under s. 13.93 (2m) (b) 7., Stats., Register. Sep- tember, 1')95, No. 477; corrections in (1) (d) 2. and 3. were made under s. 13.93 (2m) (b) 7., Stats., Register, May, 200], No. 545. NR 110.14 Sewage lift stations design criteria. (1) GENERAL. (a) Applicability. Lift stations nlay be approved when gravity sewers are not feasible or economical to transport the same design quantities of sewage. (b) Design report. A design report shall be submitted with plans and specifications for sewage lift stations. The design report shall comply with the facilities planning requirements of s. NR 110.11, as well as detailing the calculations of the lift station design capacity. (2) DESIGN CONS)DERATlONS. (a) Location. 1. Lift stations may be constructed in floodplains provided the floodprooting requirements of ss. NR 116.16 and 116.17 are met. 2. Wllere practical, lift stations shall be located off the traffic way of streets and alleys. 3. When a lift station witl be constructed within 46 meters (150 feet) ofa public or private water supply wel1, the location of the well shall be shown on the engineering plans. In the case of a private well, the department shall require a private well variance be obtained in accordance with ss. NR 812.04 and 812.08, before approval of the lift station shall be granted. (b) Design capacity. 1. Pumping rates for lift stations integral to collection systems shall be determined in the same manner as the flows for the sewers contributory to the lift station and in accordance with the provisions of s. NR 110.11 (1 ) (d). 2. Pumping rates for lift stations which operate as part of sew- age treatment facilities shall be determined in the same manner as the design flow for the treatment facility in accordance with s. NR I 10.15 (4) (c). 3. Where possible, the pumping rate shall be designed to approximate the influent flow rate to the lift station. For main pumping stations, pump stations associated with treatment facili- ties, or in cases where large fluctuations of flow are known to occur, the use of variable speed pumps, or multiple constant speed pumps may be required by the department. (3) GENERAL DESIGN REQUIREMENTS. (a) Structuralfeatures. , I. The pump chamber shall be completely separate from the wet well. 2. Provision shall be made to facilitate removal of pumps, motors, and other mechanical and electrical equipment. 3. A safe means of access shall be provided to pump chambers and to wet wells containing equipment requiring inspection 0 maintenance If a pump chamber is over 6 meters (20 feet) dee., im offset shall be made in the entrance ladder with an intennediat Register. May. 200 I. No. 545 NR 110.14 WISCONSIN ADMINISTRATIVE CODE 88 Unofficial Text (See Printed Volume). Current through date and Register shown on Title, Page. landing at approximately'mid-depth. Where an intermediate landing is used, the diameter of the landing area shall be at least 1.5 meters (5 feet) and a suitable barrier shall be provided to pre- vent an individual from falling past the intennediate landing to the lower level. 4. A sump pump shall be provided in pump chambers. The smnp pump discharge line shall be equipped with a check valve and shall discharge at an elevation as high as practical in the wet well. A siphon break shall be provided in the discharge line at the high point in the wet weIl. Pump seal water shall be piped to the sump pit. 5. All floors and walkways should be sloped to a point of drainage. 6. All wet wells shall be designed such that with any combina- tion of influent now and pumping rate, the pump cycle will not be less than 5 minutes. The total ,detention time in the wet well, at average design flow, may not exceed 30 minutes. 7. The wet well 1100r shall have a minimum slope of I to I to the hopper bottom. The horizontal area of the hopper bottom may not be greater than necessary for proper installation and function of suction pipc intake or pump inlet. 8. There may be no connection between any potable water supply and sewage lift station which might cause contamination of the potable supply. 9. Exteriors of steel lift stations shall be provided with a cathodic protection against corrosion. (6) Ventilation. I. All lift stations shall be vented to the atmo- sphere. Where the pump chamber is below the ground surface, mechanical ventilation must be provided. 2. Mechanical ventilation shall also be provided in wet wells and submersible lift stations where routine entrance is required to inspect or maintain equipment. Portable ventilation equipment should be available for wet wells and submersible pumping sta- tions which are not equipped with mechanical ventilation. 3. There may be no interconnection between wet well and pump chambcr ventilation systems. Switches for operation of ventilation equipment shall be marked and conveniently located. All intermittently operated ventilating equipment shall be inter- connected with the respective pit lighting system. Consideration should bc given also to automatic controls where intermittent operation is used. 4,. The fan wheel for ventilating hazardous areas should be fabricated from nonsparking material. 5. Mechanical ventilation for wet wells and submersible lift stations shall provide at least 12 complete air changes_per hour if ventilation is continuous and at least 30 complete air changes per hour if ventilation is intermittent. Air shall be forced into me wet well rather than exhausted. .- ~...........-.-..---~-. 6." Mechanical ventilation for pump chambers shall provide at least 6 complete air changes per hour if ventilation is continuous and at least 30 complete air changes per hour if ventilation is inter- mittent. (c) Auxiliwyequipment. The following auxiliary equipment shall be installed in Ii ft stations: 1. All pump chambers shall be equipped with automatic heat- ers. The department may waive this requirement if it can be dem- onstrated that the heat output from the pump motors is sufficient to keep equipment in the chamber from freezing. 2. The installation of dehumidifiers should be considered for all pump chambers. 3. Running time meters shall be installed for each pump in all lift stations. Where the department determines that flow measure- ment is necessary for the proper operation of the collection system or treatment system, suitable devices for measuring, totalizing, and recordi ng flow shall be installed. Register, May, 2001, No. 545 (d) Electrical equipment. Electrical systems and components including motors, lights, cables, conduits, switchboxes, and con- trol circuits, which will be located in raw sewage wet wells, or in enclosed or partially-enclosed spaces where hazardous concentra- tions of flammable gases or vapors may be present, shall comply with the national electrical code requirements for class!, group D, division 1 locations. In addition, equipment located in the wet well shall be suitable for use under corrosive conditions. Each flexible cable shall be provided with a watertight seal and separate strain relief. A fused disconnect switch or equivalent circuit breaker located above ground shall be provided for all pumping stations. When such equipment is exposed to weather, it shall be weatherproofed; (e) Duplicate units. At least 2 pumps or pneumatic ejectors shall be provided in each lift station. Each pump or ejector shall be capable of pumping the design pumping rate as determined by sub. (2) (b). If 3 or more pumps are provided, they must be designed to meet expected flow conditions and must be capable of pumping the design pumping rate as determined by sub. (2) (b), with one unit out of service. Where the pumping station will serve not more than 25 residential units, a single pump or ejector may be used, providcd that the station is designed to permit the installa- tion of a future duplicate pump or ejector with no' structural changes. (f) Pumps. I. Except where grinder pumps are used, pumps shall be capable of passing spheres of at least 7.6 centimeters (3 inches) in diameter, and pump suction and discharge piping shall be at least 10 centimeters (4 inches) in diameter. The department may allow the use of pumps with a lesser solids handling ability provided the use of the pump is justified and that a eomminutor, mechanically cleaned bar screen, or other clogging protection is provided. . 2. All pumps shall be nonclogging. Where a potential for clogging exists, protection in the form of bar screens, mechani- cally cleaned bar screens, basket screens, comminutors or other suitable means shall be provided. Bar screens and comminutors shall be installed in accordance with s. NR 110, 1 6. 3. Each pump shall be located so that under normal operating conditions it will operate under a positive suction head. Self- priming or vacuum primed pumps arc excepted from this require- ment: (g) Piping. L Each pump shall be equipped with individual suction piping. Suction piping shall be as straight as possible. 2. When suction elbows are used, the bell shall be placed above the floor of the wet well at a distance which is not greater than 1/2 nor less than 1/3 the diameter of the bell. 3. Suitable shutoff valves shall be placed on the suction and discharge lines of each pump. A check valve shall be placed on each discharge line between the shutoff valve and the pump. Check valves shall be placed in horizontal sections of pipe. 4. Valves may not be located in wet wells. (h) Controls. l. Control systems shall be of the air bubbler type, the encapsulated float type, or the 110w measuring types. 2. The control system shall be located away from the turbu- lence of incoming flow and pump suction. 3. Provisions should be made to automatically alternate the pumps in use. 4. All lift stations shall be equipped with an alarm system. The alarm system shall include audible and visual signals. The alarm system shall be activated in cases of power failure, pump failure, and at a predesignated high water leveL It is also recommended that alann systems be activated in the event of unauthorized entry or other lift station malfunction. The department may require that alarm systems be telemetered to re~ponsible authorities for large or' main lift stations. SECTION 5 OPERATION AND MAINTENANCE SOUTH MAIN STREET PUMP STATION protected by the back flow preventer, and should not be considered safe for drinking. 3. Drain Systems Floor drains are provided in the equipment room and the bar screen collection area. An additional floor drain in the pump removal area, Just inside the double door, is equipped with an oil inter- ceptor. The pipe gallery is equipped with a duplex sump pump \ system, described previously. The service sink and floor drains discharge via a drain line into the influent channel. The water seal of all traps should be inspected monthly. Storm water is drained from the roof via an internal drain line and an underground lateral to a city storm sewer in 17th Avenue. 4. Heating and Ventilating System The pump station heating and ventilating system is designed to maintain a minimum winter temperature of 550 F when the outdoor temperature is -150F. Summer cooling is provided by forced venti- lation which is designed to prevent indoor temperatures from ex- ceeding outdoor temperature by 200F when indoor temperature exceeds 900 F. Forced ventilation is also used to provide required air changes in accordance with applicable codes. These ventilation air change requirements are summarized as follows: Area Ai r Changes Pe r Hour CFM Wet Well "A" Wet Well "B" Pump ~emoval Area Influent Channel and Bar Screen Collection Area Pipe Gallery 30 AC (When occupied) 30 AC (when occupied) 30 AC (when occupied) 12 AC (continuous) 30 AC (when occupied) 1,490 2,350 2,815 CD 2,000 3,590 5-14 · '0:> SECTION 5 OPERATION AND MAINTENANCE SOUTH MAIN STREET PUMP STATION air temperature controller located On the remote control panel modulates the burner controls to maintain a 6SoF discharge air temperature whenever the control switch is in the "winter" position. d. Bar Screen Collection Area Make-Up Air Unit (MU-2) ". This unit runs continuously. An explosion-proof wall-mounted thermostat controls the discharge air temperature during the heating season. The thermostat is adjustable from 4S0F to 8SoF and is wired to the remote control panel located on the east wall of the equipment room. The thermostat should be checked at the beginning of the heating season to see that it is not set too high, to avoid unnecessary heating of the area. A setting of 450F during unoccupied hours should be adequate to protect the equipment in the Bar Screen Collection Area. e. Gas-Fired Unit Heaters (00-1 & 00-3) The generator room and equipment room are served by gas-fired unit heaters. The heaters cycle to maintain S50F space condi- tions, as sensed by wall thermostats. (00-1 will not maintain 550F space temperature during generator operation.) f. Explosion-Proof Electric Unit Heater (UH-2) This unit, located in the pump removal area, will cycle to maintain 550 F (adjustable) space condi tions as sensed by the wall-mounted explosion-proof thermostat. 5-16 , \j ~.r' Oe..v\.~~ KcdrOSG?-: l,d-' ~~lA,;) e.- M.~~<- 0 (P At rP A- '::30