591.23112.LWM_MDOTEngadineGarageGenerator_Addendum 1_Issued_20231115.pdf

ADDENDUM NO. 1

DATE: November 15, 2023

PROJECT: MDOT Engadine Garage Generator Replacement

OWNER: MI DTMB

DTMB FILE NO.: 591/23112.LWM

BID DATE: Wednesday, December 6, 2023 @ 2:00 p.m. EST. **THIS ADDENDUM DOES

NOT CHANGE THE BID DATE**

The following shall be incorporated into the Contract Documents dated 2023 OCTOBER 27.

GENERAL

The pre-bid meeting attendance sheet is attached.

Contractor daily reports are to include a minimum of 5 photos daily that show relevant work of that day.

PROJECT MANUAL

DRAWINGS

C-110 SITE PLAN – Revised conduit runs to diesel tank dispensers through concrete pad. Added slope restoration for conduit going to handhole behind the diesel tank dispensers. Added remove, salvage and reinstall of sign in front of the diesel tanks.

EDP101 FIRST FLOOR ELECTRICAL DEMOLITION PLAN – Clarified notes and removal extents of conduit for gas dispensers.

EP101 FIRST FLOOR POWER PLAN - Revise conduit runs from diesel tank dispensers to be individually run to main building with seal offs. Provide handhole within existing homerun route to sign shop in order to re-feed exterior gas-dispenser lights to main building SP panel. Clarify notes on gas dispenser and gas dispenser lighting conduit runs above/below grade on homerun back to SP panel.

E-501 ELECTRICAL DETAILS – Provide handhole detail to specify requirements of handhole.

End of Addendum No. 1

DTMB-0441 (R 19.02)

MEETING ATTENDANCE RECORD

DEPARTMENT OF TECHNOLOGY, MANAGEMENT AND BUDGET

State Facilities Administration Design and Construction Division

PROJECT DESCRIPTION/LOCATION

DATE

TIME

FILE NUMBER

CONTRACT NUMBER

MEETING PLACE

PLEASE PRINT YOUR NAME

FIRM YOU REPRESENT

EMAIL ADDRESS

TELEPHONE NUMBER

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TRENCH DETAIL FOR UTILITIES UNDER ROAD3

TRENCH DETAIL FOR PLASTIC OR METAL UTILITIES2

HMA PATCH CROSSECTION5

HMA APPLICATION TABLE6

SITE PLAN1

CONCRETE SIDEWALK CROSSECTION4

CONCRETE JOINT TIE7 SIGN TO BE REMOVED, SALVAGED, AND REPLACED8

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FLAMMABLE MATERIAL

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HAZARDOUS OR

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TRENCH WIDTH

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AutoCAD SHX Text I.D.

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6" MDOT 22A OR 21AA AGGREGATE

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(COMPACTED TO 98%%%)

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GRANULAR MATERIAL

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MDOT CLASS II OR CLASS IIIA

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ELECTRICAL CONDUIT

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4" MINIMUM BEDDING

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5EL

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4EL

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EXISTING HMA

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EXISTING HMA

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EXISTING HMA

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EXISTING HMA

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(COMPACTED TO 95%%%)

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4EL

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WARNING TAPE

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GRANULAR MATERIAL

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MDOT CLASS II

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(COMPACTED TO 95%%%)

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TRENCH WIDTH

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SUITABLE MATERIAL

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EXCAVATED FROM

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TRENCH

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(OTHER THAN WET

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UNSTABLE CLAY)

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GRANULAR MATERIAL

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MDOT CLASS II OR CLASS IIIA

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PLASTIC OR METAL UTILITIES

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EXISTING GROUND

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4" MINIMUM BEDDING

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(COMPACTED TO 95%)

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WARNING TAPE

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1 1/2" MDOT 5EL TOP COURSE

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6" MDOT 22A OR 21AA AGGREGATE (COMPACTED TO 98%)

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8" TO 12" GRANULAR MATERIAL MDOT CLASS II (COMPACTED TO 95%)

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2" MDOT 4EL LEVELING COURSE

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2" MDOT 4EL BASE COURSE

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PERMANENT HMA APPLICATION CHART

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SYMBOL

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PAY ITEM

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RATE (LB/SYD)

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DEPTH (IN)

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PERFORMANCE GRADE

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REMARKS

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HMA, 5EL

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165 LB

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AutoCAD SHX Text 58-34

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TOP COURSE, AWI = 260 MINIMUM

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HMA, 4EL

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220 LB

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BASE AND LEVELING COURSE

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0.05 - 0.15 GAL/SYD

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AutoCAD SHX Text TYPE SS-1h

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BOND COAT - TO BE APPLIED BETWEEN EACH LIFT OF NEW PERMANENT HMA

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5EL

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4EL

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SUITABLE SUBGRADE MATERIAL COMPACTED TO 95%

AutoCAD SHX Text 6" CONC WITH 6"X6" REINFORCING MESH W1.4xW1.4 WWF

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6" MDOT 22A OR 21AA (COMPACTED TO 95%)

http://www.ohm-advisors.com AutoCAD SHX Text

UNDERGROUND ELECTRIC, MINIMUM BURY DEPTH 24" UNDER ROAD WAY, SEE SHEET EP-101

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2" GAS

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GENERATOR PAD +/- 4" ON EACH SIDE TO MATCH GENERATOR INSTALLED. SEE SHEET E-501

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SLOPE RESTORATION (TYP)

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NTS

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NTS

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NTS

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NTS

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UNDERGROUND ELECTRIC, SEE SHEET EP-101

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UNDERGROUND ELECTRIC

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REMOVE AND REPLACE CONC PAD, 6"

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REMOVE AND REPLACE CURB, TYPE E

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NTS

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PROTECT STORAGE BUILDING

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FUEL PUMPS

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REMOVE AND REPLACE HMA

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MINIMUM SEPARATION BETWEEN UTILITES

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MINIMUM BURY DEPTH 18"

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EXPANSION JOINT

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EXPANSION JOINT

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(4) BARRICADE TYPE III

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(4) BARRICADE TYPE III

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HAND DIG BETWEEN SHED AND CONCRETE PAD TO INSTALL CONDUIT

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HH WITH SEAL-OFF, SEE SHEET EP-101

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CONDUIT WITH SEAL-OFFS, SEE SHEET EP-101

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REMOVE, SALVAGE AND REINSTALL SIGN

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REMOVE AND REPLACE CONCRETE PAD WITH JOINT TIES TO INSTALL CONDUIT AS NECESSARY

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AutoCAD SHX Text DRILL HOLE INTO EXISTING CONCRETE PAVEMENT AND GROUT-IN-PLACE #5 X 1' LONG EPOXY COATED DEFORMED BARS. INSTALL 6" FROM END OF CONCRETE REPAIR EVERY 1'3" ALTERNATING EXISTING CONCRETE SIDES.

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12 PAVEMENT THICKNESS

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EXISTING CONCRETE

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CONCRETE REPAIR

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NTS

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NTS

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SIGN TO BE REMOVED, SALVAGED AND REINSTALLED.

T

S

M

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PO LP-1

MECH ROOM PANEL

MAIN SERVICE PANEL

15 KW GENERATOR

60A MANUAL TRANSFER SWITCH. SEE DETAIL 2 ON ED501.

PANEL SP

GAS METER

CT CABINET AND METER

GENERATOR EXHAUST

GENERATOR GAS TANK

EQUIPMENT ROOM

MECHANICS OFFICE

GENERATOR ROOM

WOMENS LOCKER

MENS LOCKER

TMW OFFICE

CLERK/FILE OFFICE

SUPERVISORS OFFICE

EXISTING FOYER

EXISTING UTILITY ROOM

LUNCH/MEETING/TRAINING ROOM

EXIST J.C.

EXIST UNISEX TOILET

1. DRAWINGS SHOW MAJOR DEMOLITION ONLY; THE CONTRACTOR SHALL PROVIDE ALL DEMOLITION

FOR THE COMPLETION OF THE WORK WHETHER EXPLICITLY SHOWN OR NOT.

2. THE OWNER RESERVES THE RIGHT TO KEEP ANY REMOVED EQUIPMENT OR MATERIALS. ALL

DEMOLITION DEBRIS TO BE REMOVED FROM THE SITE AND DISPOSED OF IN AN APPROVED LANDFILL.

3. THE CONTRACTOR SHALL BE RESPONSIBLE FOR ANY TEMPORARY EXTERIOR OPENINGS MADE FROM

DEMOLITION WORK TO ENSURE THEY ARE WEATHER TIGHT AT THE END OF EACH DAY.

4. THE ELECTRICAL CONTRACTOR IS RESPONSIBLE FOR ALL PATCHING WHERE CONDUITS AND

JUNCTION BOXES ARE REMOVED UNLESS OTHERWISE NOTED.

5. ANY JUNCTION BOXES REMAINING IN PLACE THAT HAVE HAD DEVICES REMOVED ARE TO RECEIVE

BLANK COVER PLATES MATCHING PROJECT REQUIREMENTS.

6. CONDUITS AND CONDUCTORS ABANDONED AS PART OF THE WORK SHALL BE DEMOLISHED WHERE NOT BURIED IN WALLS OR UNDERGROUND. CAP OR PLUG ANY ABANDONED CONDUITS THAT REMAIN.

7. WHERE DEVICES ARE REMOVED FROM THE MIDDLE OF A CIRCUIT, THE CONTRACTOR SHALL BE RESPONSIBLE TO RE-ROUTE THE CIRCUIT TO MAINTAIN CIRCUIT INTEGRITY TO REMAINING DEVICES.

8. CONTRACTOR TO NOTIFY ENGINEER OF ANY DISCREPANCIES FOUND IN EXISTING CONDITIONS.

9. CONTRACTOR TO COORDINATE WITH THE OWNER OR ENGINEER A MINIMUM OF 24 HOURS IN

ADVANCE OF SHUTTING OFF OR DISCONNECTING ANY UTILITIES. CONTRACTOR TO ENSURE ALL

EXISTING SYSTEMS TO REMAIN ARE MAINTAINED THROUGHOUT THE DURATION OF THE PROJECT

UNLESS OTHERWISE DIRECTED BY THE ENGINEER/OWNER.

10. CONTRACTOR TO TAKE ALL PRECAUTIONS NECESSARY TO PROTECT ITEMS NOT INTENDED TO BE

DEMOLISHED AND TO RESTORE TO EXISTING CONDITIONS ANY ITEMS DAMAGED THAT WERE NOT

INTENDED TO BE DEMOLISHED.

GENERAL NOTES - ELECTRICAL DEMOLITION

GAS DISPENSER

GAS DISPENSER

RELOCATE CIRCUITS 1, 5, AND 7 WITHIN

SIGN SHOP PANEL TO NEW SP PANEL

LOCATED WITHIN MAINTENANCE

GARAGE IN MAIN BUILDING

SIGN SHOP PANEL

MAIN BUILDING

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MAIN BUILDING DEMOLITION PLAN

SHEET KEYNOTES - ELEC. DEMOLITION

1 DISCONNECT AND REMOVE PANEL. BRANCH CIRCUIT CONDUIT AND CONDUCTORS TO REMAIN. REMOVE

FEEDER CONDUIT AND CONDUCTOR BACK TO SOURCE.

2 REMOVE MANUAL TRANSFER SWITCH. REMOVE CONDUIT AND CONDUCTORS BACK TO SOURCE.

3 REMOVE RECEPTACLE. REMOVE CONDUCTORS AND SALVAGE CONDUIT FOR RE-USE. SALVAGE IT

EQUIPMENT GROUND FOR RE-USE.

4 DISCONNECT CIRCUITS 1, 5, 7. REMOVE CONDUCTORS. REMOVE CONDUIT ABOVE GRADE AND WITHIN BUILDING. ABANDON CONDUIT BELOW GRADE. REMOVE SLEEVE AND SEAL EXTERIOR WALL PENETRATION

WITH MORTAR.

5 SALVAGE EMERGENCY FUEL SHUT OFF AND EXISTING EMERGENCY FUEL SHUTOFF SIGN. REMOVE

CONDUCTORS. REMOVE CONDUIT ABOVE GRADE AND ABANDON CONDUIT BELOW GRADE. REMOVE

SLEEVE AND SEAL EXTERIOR WALL PENETRATION WITH MORTAR.

6 REMOVE GENERATOR AND DISPOSE OF LEGALLY FOLLOWING REGULATORY REQUIREMENTS. REMOVE CONDUIT AND CONDUCTORS BACK TO MANUAL TRANSFER SWITCH. REMOVE GENERATOR STAND. SEAL

ANY WALL/FLOOR PENETATIONS.

7 REMOVE 60A BREAKER FOR SHOP SP GENERATOR FROM MAIN SERVICE PANEL.

8 REMOVE CIRCUITS 3, 4, 5, 6, 7, 33, 35, 37 FROM LP-1. CIRCUITS TO BE RE-LOCATED TO NEW SP PANEL.

9 REMOVE GENERATOR EXHAUST AND GAS TANK. REMOVE ANY STRUCTURALLY SUPPORTING DEVICES.

REMOVE EXHAUST PIPE WITHIN EXTERIOR WALL AND SEAL EXTERIOR WALL PENETRATION WITH MORTAR.

10 REMOVE EXISTING SEAL OFF AND ANY CONDUIT AND CONDUCTORS THAT REMAIN ABOVE GRADE FROM

PREVIOUS GAS DISPENSER ELECTRICAL FEED.

11 REMOVE CONDUIT FROM GAS DISPENSER BELOW GRADE TO EXTENTS OF CONCRETE REMOVAL.

ABANDON CONDUIT PAST REMOVAL EXTENTS.

1/8" = 1'-0"1

SIGN SHOP BUILDING DEMOLITION PLAN

KEYPLAN

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LP-1

MECH ROOM PANEL

SP

GAS DISPENSER

GAS DISPENSER

125A, NEMA 12, NON-SERVICE RATED ATS.

SEE DETAIL 1 ON E-501 FOR ELEVATION.

40KW NATURAL GAS GENERATOR.

GENERATOR PAD. SEE DETAIL 4

ON E-501.

CONDUIT TO TERMINATE ABOVE

GROUND WITH CONDUIT SEAL OFFS.

CAN TRANSITION TO 1" EMT BEYOND

SEAL OFFS INTO BUILDING VIA J-BOX

RE-FEED GAS DISPENSER FROM NEW SP PANEL IN

MAINTENANCE GARAGE. 8' WIDE OPEN CUT PAVEMENT FOR

CONDUIT AND CONDUCTORS. REFER TO C-110 FOR

DEMOLITION EXTENTS AND RESTORATION DETAILS.

RE-FEED EXISTING CIRCUITS WITHIN NEW SP PANEL

REINSTALL SALVAGED EMERGENCY FUEL

SHUTOFF PUSH BUTTON AND SIGN

BUILDING MOUNTED

GENERATOR E-STOP

2" CONDUIT W/ 4-#1AWG + #6EG TO PANEL SP

1" CONDUIT W/ 8-#14AWG + RJ45 STP TO REMOTE ANNUNCIATOR

1" CONDUIT W/ 6-#12AWG + #12EG FOR

GAS DISPENSER PUMPS AND LIGHTING RECIRCUITED TO SP PANEL.

1-3/4" CONDUIT W/ 4-#12AWG + #12EG FOR BATTERY CHARGER/BATTERY

HEATER & BLOCK HEATER.

GAS METER

CT CABINET AND METER

2" CONDUIT W/ 4-#1AWG + #6EG.

1" CONDUIT W/ 8-#14AWG FOR CONTROLS.

1-3/4" CONDUIT W/ 4-#12AWG + #12EG FOR

BATTERY CHARGER & BLOCK HEATER.

8' - 0"

REMOTE ANNUNCIATOR

SEE CIVIL SHEET C-110 FOR CONCRETE REMOVAL

NEEDED FOR GAS PIPE & CONDUIT INSTALLATION

CONDUIT TO TERMINATE ABOVE

GROUND WITH CONDUIT SEAL OFFS.

3 - 1" CONDUIT W/ 2 - #12AWG + #12EG.

CONDUIT TO BE PVC COATED RMC

BETWEEN SEAL OFFS.

EQUIPMENT ROOM

MECHANICS OFFICE

GENERATOR ROOM

WOMENS LOCKER

MENS LOCKER

TMW OFFICE

CLERK/FILE OFFICE

SUPERVISORS OFFICE

EXISTING FOYER

EXISTING UTILITY ROOM

LUNCH/MEETING/TRAINING ROOM

EXIST J.C.

EXIST UNISEX TOILET

DISCONNECT EXISTING CIRCUIT TO SIGN SHOP

AND PLACE HANDHOLE WITHIN HOMERUN IN

ORDER TO RE-FEED LIGHTS TO MAIN BUILDING.

PROVIDE SEAL-OFF WITHIN HANDHOLE.

HH

RUN CONDUIT WITHIN GREEN SPACE NEXT TO

STORAGE BUILDING AND DIESEL TANK CONCRETE

EXISTING LIGHTING

MAIN BUILDING

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S W1/8" = 1'-0"1

MAIN BUILDING POWER PLAN

KEYPLAN

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PANEL

MECH

RM

MAIN

BREAKER800A

SIGN SHOP200A WELDER

SHOP 1Ø

(PANEL LP-1)

PANEL SP

COLD

STORAGE

100A

PANEL

MECH RM

SHOP 3Ø

(PANEL PO)

125A

SALT

STORAGE

OFFICE

HVAC

60A SPACE

100A

100A

100A

100A

100A

120/240 VOLT

3 PHASE 4 WIRE DELTA

EATON: PRL-4B

J#: HGR81505

IT FRONT END

RE-INSTALL SALVAGED

RECEPTACLE & CONDUIT.

REPLACE BREAKER W/ 125A 3Ø BREAKER

125A NON-SERVICE RATED ATS W/ SOLID NEUTRAL

RE-FEED IT EQUIPMENT GROUND FOR IT FRONT END.

COLD-STORAGE PANEL

MAIN SERVICE PANEL 800A

800A SERVICE RATED SWITCHBOARD,

800A MCB, 240V/120V DELTA

60A SPARE

PANEL PO (LABELED

AS SHOP 3Ø AT DP)

100A 100A 100A

M

GEN.

NATURAL GAS STANDBY

GENERATOR

40KW, 240V/120 DELTA

240/120V, 3Ø, 125A.

NEMA 12, 25KA, NON-

SERVICE RATED ATS

WITH SOLID NEUTRAL

POLE MOUNT TRANSFORMERS

240V/120 DELTA SECONDARY

CT CABINET & METER

100A 100A 200A 100A 125A

OFFICE HVAC

SALT-STORAGE PANEL

SIGN

SHOP

LP-1 (LABELED

AS 1Ø AT DP)

MECH RM

PANEL

WELDER

PANEL SP

120/240V, 3Ø, 125A

42 CKT

BUILDING

DISCONNECT

LOCATED IN SEPARATE

BUILDINGS

LOCATED IN SEPARATE

BUILDING

OVERHEAD UTILITY CONDUCTORS OVERHEAD UTILITY CONDUCTORS

125A

2" CONDUIT W/ 4-#1AWG + #6EG

NATURAL GASCUMMINS

FUELMANUFACTURER MODEL # VOLTAGE

GENERATOR SCHEDULE

C40N6

RATING (kW)

PHASE

240V/120D 3Φ

COMMENTS

PROVIDE SOUND ATTENUATION

ENCLOSURE

#6 AWG CU GND

GRADE

5/8" X 8' GROUND ROD

BOND GROUND TO

FOUNDATION REBAR

#2 AWG BOND TO REBAR AND FABRIC1" CHAMFER EDGE AROUND

ENTIRE PERIMETER

#4 REBAR AROUND ENTIRE

THICKENED PERIMETER 6" CONC SLAB ON GRADE W/ 6"X6"

W2.9XW2.9 WELDED WIRE FABRIC IN

SHEETS SUPPORTED OFF GRADE W/

CONCRETE SUPPORTS

PROVIDE 12" OF CLEAN COMPACTED

SAND UNDER ENTIRE SLAB.

CONC SLAB ON GRADE W/ 6"X6" WELDED WIRE

FABRIC SUPPORTED OFF GRADE W/ SUPPORTS

10"

1'-4"

6"

18'

GENERATOR DIMENSION + 4"

G E

N E

R A

T O

R D

IM

E

N S

IO

N

4"

94"

.5

SP PANEL

1" CONDUIT FOR POWER

TO BATTERY CHARGER,

BATTERY WARMER AND

ENGINE BLOCK WARMER.

1" CONDUIT FOR

GENERATOR START AND

ATS STATUS

ATS

2" CONDUIT FOR

POWER CONDUCTORS

GENERATOR

CONTROL PANEL

CONCRETE PAD

FINISHED GRADE

WEATHER PROOF ENCLOSURE

MAIN SERVICE

ENTRANCE PANEL

REMOTE

ANNUNCIATOR

PANEL

1" CONDUIT FOR

COMMUNICATION AND POWER

E-STOP

3/4" CONDUIT

WITH 2-#14AWG

BUILDING MOUNTED E-STOP

2" CONDUIT FOR POWER

CONDUCTORS

BOX SHALL BE CONCRETE OR COMPOSITE. METAL COVER IS ACCEPTABLE.

COVERS SHALL BE SECURED WITH 3/8" BOLTS, NUTS AND WASHERS. WHICH SHALL BE

BRASS, STAINLESS STEEL OR OTHER CORROSION RESISTANT MATERIAL. STAINLESS STEEL

SHALL HAVE A CHROMIUM CONTENT OF NOT LESS THAN 18% AND A NICKEL CONTENT OF

NOT LESS THAN 8%, NUTS SHALL BE RECESSED BELOW TOP SURFACE OF COVER.

COVER LETTERING SHALL BE 1/2" MINIMUM LETTERS CAST IN STANDARD MARKINGS:

(ELECTRICAL).

CONDUIT ENTERING THE BOX SHALL HAVE 90 DEGREE LONG RADIUS BEND (INSIDE THE

BOX). THE CONDUITS OPENING, IINSIDE THE BOX, SHALL BE AT LEAST 4" BELOW THE LID,

OPENING SHALL HAVE SMOOTH EDGE. IF THE CONDUIT IS P.V.C. A SLIP COUPLING MUST BE

USED. IF THE CONDUIT IS RIGID PIPE, A PROTECTIVE BUSHING SHALL BE USED.

CONDUCTORS SHALL HAVE A MINIMUM OF 24" SLACK FROM CONDUIT BELL END.

BACKFILL WITH EXCAVATED MATERIAL AND THOROUGHLY COMPACT.

WHERE PULLBOXES ARE INSTALLED IN CONCRETE AREAS, 1/2" PREMOLDED EXPANSION

JOINT SHALL BE INSTALLED AROUND THE BOX.

BOXES IN NON-VEHICLE TRAFFIC AREAS TO BE TIER 8 AND IN VEHICLE TRAFFIC AREAS TO

BE TIER 22 UNLESS OTHERWISE NOTED.

NOTE:

1.)

2.)

3.)

4.)

5.)

6.)

7.)

5/8" x4" LIFTING SLOTS

16" x 8" CONCRETE BRICK

COVER TO BE FLUSH WITH FINISH GRADE

ALL CONDUIT END BELLS SHALL BE

INSTALLED BEFORE PULLING WIRE

1" PVC CONDUIT FOR DRAINAGE

6A BACKFILL WITH MINIMUM

OF 5" DEPTH

23 3/4"

21 1/4"

15 9/16"

/2

/8

15 3/8"

ELECTRICAL

M

IN

8.)

PROVIDE CONDUIT SEAL-OFF ON

HOMERUN TO MAIN BUILDING

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M D

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P ro je ct

N o.

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N.T.S1

MAIN SERVICE PANEL ELEVATION

N.T.S2

ONE-LINE DIAGRAM

N.T.S3

GENERATOR SCHEDULE

N.T.S4

GENERATOR PAD DETAIL

N.T.S6

GENERATOR WIRING DIAGRAM

N.T.S5

HANDHOLE DETAIL

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