DUE CARE POLICY Attachment 1 - List of Known Sites of Environmental Contamination (Due Care Sites) Within the ITC Transmission System

Site DCP HASP Identified Property Identification Owner Comments Address Y/N Y/N Contaminants ITCTRANSMISSION

Bunce Creek 340 Gratiot Boulevard, ITC Y Y PAH, VOCs, Residual contamination from a defunct Marysville, MI 48040 Metals manufactured gas plant that was located on adjacent property Belleville Warehouse 10885 Textile Road ITC Y N VOCs, Metals Localized contamination from leaking (Textile) Ypsilanti, MI 48111 drums and storage tank prior to occupation by ITC Navarre 1091 South Dix Street ITC Y Y VOCs, PAH Spill of naphthalene originated on Detroit, MI 48217 Marathon Site - they have a Remedial Action Plan Colfax Peaker 4025 Gregory Road, DTE Energy Y N VOCs, PAH, Historical contamination from spills/leaks Fowlerville, MI 48836 Metals near the ASTs, generators, and containment areas. DTE Due Care Plan. Ironton Station 210 Great Lakes Avenue, River DTE Energy N N Alkalinity/pH Groundwater at substation and in Rouge, MI 48218 manholes in the surrounding areas have historically shown elevated pH levels. Dayton Peaker 50550 Bemis Road DTE Energy Y N LNAPL, VOCs, Historical contamination from spills/leaks Belleville, MI 48111 PAH, near the ASTs, generators, and Metals containment areas. DTE Due Care Plan. Northeast Peaker 6401 East 8 Mile Road, DTE Energy Y N VOCs & PAH Historical contamination from spills/leaks Warren, MI 48091 near the ASTs, generators, and containment areas. DTE Due Care Plan. Oliver Peaker 346 Gagetown Road DTE Energy Y N VOCs, PAH, Historical contamination from spills/leaks Pigeon, MI Metals near the ASTs, generators, and containment areas. DTE Due Care Plan. Ottawa Substation 32673 Glendale Street, DTE Energy Y N VOCs & PAH Historical contamination from landfill, rifle Livonia, MI 48091 range, and recycling center that were present on site prior to DTE use. DTE Due Care Plan. Placid Peaker 4912 Edgar Road, DTE Energy Y N VOCs & PAH Historical contamination from spills/leaks Clarkston, MI 48346 near the ASTs, generators, and containment areas. DTE Due Care Plan. Pluto Substation 27900 Lorna Avenue, DTE Energy Y N VOCs Historical contamination from previous Warren, MI 48092 industrial/commercial uses of property - majority of contaminated soils have been removed. DTE Due Care Plan. Putnam Peaker 5660 Mertz Road, DTE Energy Y N VOCs & PAH Historical contamination from spills/leaks Mayville, MI near the ASTs, generators, and containment areas. DTE Due Care Plan. Skylark Station 6250 W. Chicago Rd. DTE Energy Y Y VOCs, SVOCs, Historical contamination from past uses at Warren, MI 48090 PCBs, Metals General Motors Complex. GM requires this site to be managed through their Due Care Plan. Superior Peaker 6000 First Street DTE Energy Y N VOCs & PAH Historical contamination from spills/leaks Ypsilanti, MI 48197 near the ASTs, generators, and containment areas. DTE Due Care Plan. Temple Street Station Temple St. & Charlotte St. DTE Energy Y Y VOCs, SVOCs, Historical contaminaiton form past use Detroit, MI PCB, RCRA inlcuding dry cleaning and USTs. 3 feet metals below grade has been excavated and replaced with clean fill. DTE Due Care Plan. Zenon Station 6500 Desmond Avenue, Detroit, MI DTE Energy Y N VOCs, PAHs, Some remediation was performed prior to Metals construction of station. Other impacted soils were removed during construction. Some impacts remain. DTE Due Care Plan. Wilmot Peaker 5977 E. Bevens Road DTE Energy Y N VOCs & PAH Historical contamination from spills/leaks Wilmot, MI near the ASTs, generators, and containment areas. DTE Due Care Plan. Novi Headquarters 27175 Energy Way ITC Y N Metals, VOCs Illegal fill material found on-site suspected Novi, MI 48377 to be left during construction of adjacent highway exit ramp - majority of contamintion was removed during construction of the Headquarters METC Beals Road Station 248 28th Street SW, Grand Rapids, Consumers Y N VOCs, Metals, All soil restrictions are along west edge of MI 49508 Energy PCBs substation and do not affect METC substation equipment. Groundwater is contaminated throughout site. Leoni Station 583 Sheridan Road, Jackson, MI METC Y N Metals, PAHs METC assets may not be within Due Care 49201 (Jackson Power/Kinder limits - should still evaluate if intrusive Morgan) work is to be performed. Kinder Morgan Due Care Plan. Cobb B.C. Power Plant 151 N. Causway, Muskegon, MI Consumers N N Metals METC has four 138kV lines with several 49445 Energy structures that run through the Cobb coal ash landfills. Coordination with CE and MDEQ is required for any intrusive work on these structures. Karn-Weadock Power Plant 2555 N. Weadock Highway, Consumers N N Metals METC has four 138kV lines with several Essexville, MI 48732 Energy structures that run through the Karn- Weadock coal ash landfills. Coordination with CE and MDEQ is required for any intrusive work on these structures.

JR Whiting Power Plant 4525 East Erie Road, Erie, MI 48133 Consumers N N Metals METC has three138kV lines with several Energy structures that run through the Whiting coal ash landfills. Coordination with CE and MDEQ is required for any intrusive work on these structures. Baraga 612 North Avenue NE. METC Y Y PAH, VOCs Historical contamination from previous Grand Rapids, MI 49305 Metals industrial/commercial uses of property ITC Midwest

Boone Subs (Ronco, 115 kV Area between Harrison & Crawford Alliant Energy N N VOCs, PAH, Former MGP - Former coal fired east, 115 kV west, Harrison and Streets and 7th to 9th Streets Metals generating plant -Historical Boone) Boone, IA 50036 contamination from previous use of property - Need to gather data before subsurface works begin Clinton Second Street 109 North 2nd Street, Alliant Energy N N VOCs, PAH, Former MGP - Historical contamination Clinton, IA 52732 Metals from previous use of property - Consent Order for remediation signed w/EPA in 2004

Fairfield 7th Street 609 W. Washington Ave. Alliant Energy N Y VOCs, PAHs Former MGP - Historical contamiaton Fairfield, IA 52556 Metals and from previous use of property. Cyanide Fairfield Washington 606 W. Washington Ave. Alliant Energy Y Y VOCs, PAHs Former MGP - Historical contamiaton Fairfield, IA 52556 Metals and from prefious use of property. Limited Cyanide Site Investigation Report by Terracon 11- 1-2013. Fox Lake Power Plant/Substation 844 125th St. Alliant Energy N Y Crystalline Silica, Former Fly ash landfill, former coal Sherburn, MN Metals storage area. Marshalltown - East Nevada 611 East Nevada St. Alliant Energy N Y VOCs Former MGP - Historical contamination Marshalltown, IA 50158 from previous use of property. Product recovery continues. Mason City MGP 5th & Delaware Alliant Energy N N VOCs, PAH Former MGP - Historical contamination Mason City, IA 50401 from previous use of property - Record of Determination in 2000 - site is considered closed RC entered on 8/14/2003 EC entered on 0/15/2008 Downstown Industrial Substation 401 C Avenue NE, Cedar Rapids, IA Alliant Energy N N SVOCs Historical contamination from previous 52401 use of property. Limited Site Investigation Report by Terracon 2-24-2011.

River Run Substation 1800 10th Street SE, Cedar Rapids, Alliant Energy Y N SVOCs Historical contamination from previous IA 52401 use of property. Soil Management Plan developed by Terracon 5-18-2011. Washington MPG 202 E. 3rd Street, Alliant Energy Y Y VOCs, PAHs Former MGP - Historical contamination Washington, IA 52353 Metals and from previous use of property - DCP Cyanide being written - a Consent Order signed w/State in 1990 - State requested an EC in 2008 Corridor/Other Sites ITCT O/H Corridor (Erin- 2800 Gratiot Ave. 3rd party/ N N VOCs Former Shell Service Station - Notice of Stephens #1 and #2) Eastpointe, MI easement Cont. & Migration from MDEQ. (NE corner of 8 Mile and Gratiot). ITCT U/G Corridor (Lincoln-Troy) 305 West Eleven Mile Road 3rd party/ N N VOCs Historical - gas station impacted the Royal Oak, Michigan easement subsurface - ITC has an underground high (SW corner of 11 Mile and voltage transmission line about 50 feet to Washington) the west of the property METC O/H Corridors (Wealthy-4 Butterworth Landfill. West of Wealthy 3rd party/ N N N/A 4 Mile-Wealthy structures are not within Mile & Tallmadge-Wealthy #1 & Street Station: 840 Wealthy Street easement landfill boundary, however care should be #2 lines) SW, Grand Rapids, MI 49504 taken no to disturb adjacent landfill cap. Soils should be analyzed regardless. Tallmadge-Wealthy structures are within landfill boundary. METC O/H Corridor (Plymouth Kinder Morgan/Jackson Power - 3rd party/ Y N Metals, PAHs METC assets may not be within Due Care #1 and #2 Lines) 2219 Chapin Street, Jackson, MI easement limits - should still evaluate if intrusive work is to be performed. Kinder Morgan Due Crae Plan. METC O/H Corridor GM Malleable Iron Plant: 77 Center 3rd party/ N Y Metals, PCB Former Steel Foundry. ITC Street, Saginaw, MI 48602 easement decommissioned circuit and removed towers from this location (cut at ground level). ITCT O/H Corridor (Bloomfield- Towers 332 to 344 3rd party/ N Y VOCs, Metals BEAs for multiple parcels from past Hamlin) easement contamination for industrial use and railroad lines. ITCT O/H Corridor (Southfield- Towers 8421 and 8424 3rd party/ N Y VOCs Historical contamination based on Due Sunset) easement Diligence records and available property owners' informaiton. ITCT O/H Corridor (River Rouge- Structure #3091 (outside Ironton 3rd party/ N Y VOCs, SVOCs, Historical contamination from US Steel. Ironton #1) Station) easement PCBs, Metals, pH Soil has a high pH and can impact groundwater. Metals concentrations are signifiantly high and are considered hazardous waste. Contamination was found in area of structure #3091 however soils and groundwater from ITCT O/H Corridor (River Rouge- 8557 Dearborn Ave. 3rd party/ N N VOCs Historical contamination from previous Zenon & River Rouge-Maxwell) Detroit, MI easement industrial/commercial uses of property - (just west of Jefferson) Detroit Oil Company Lat. 42.291081 - Long. 83.119252

ITCM O/H Corridor (Iowa Falls Iowa Falls, IA. Structure #108 and 3rd party/ N N Former MGP - Historical contamiaton Industrial - Nuthatch) #109. easement from previous use of property. Need to evaluate available data prior to any below- grade work. ITCM O/H Corridor (Gardners John Deere Dubuque, IA 3rd party/ Y Y Metals Former John Deere landfill in vacinity of Lane - John Deere) easement structures 88 through 91. Chromium, lead and mercury are chemcials of concerns. John Deere Due Care Plan. ITCM O/H Corridor (River Run - Cedar Rapids, IA 3rd party/ N N Metals Historical contamination from former Downtown Industrial) easement industrial use along the Cedar River. Limited Site Investigation developed by Terracon 4-3-2012. Weeds Lake Right-of-Way 9551 W. L Ave.& 8619 W. ML Ave., 3rd party/ Y Y Metals Arsenic contamination from former Kalamazoo, MI. Structures #51612 - easement orchard operation #51619 and #51672 - #51679 Various ITCT Underground City of River Rouge 3rd party/ N N Alkalinity Very common to find elevated pH levels in Manholes easement groundwater due to past steel production history of area. Key: DCP = Due Care Plan MGP = Manufactured Gas Plant VOC = Volatile Organic Compounds (found in EC = Environmental Covenant PAH = Polynuclear Aromatic Hydrocarbon (found in tar/asphalt) gasoline, and solvents) HASP = Health and Safety Plan PPE = Personal Protective Equipment LNAPL = Light non-aqueous phase liquid RC = Restrictive Covenant

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