Central Maine Power 

May 4, 2010 

Mr. Terrence Connelly 

Office of Site Remediation and Restoration 

U.S. Environmental Protection Agency 

5 Post Office Square, Suite 100 

Mail Code OSRR07-1 

Boston, MA 02109-3912 

RE: O'CONNOR COMPANY SUPERFUND SITE 

INSPECTION REPORT - April 2010 

Dear Mr. Connelly: 

Superfund Records Center 

SITE: <J' (<Dov\yr 

BREAK: ^ 3 .... 

OTHER: J6V 

Enclosed is a copy of the inspection of the O'Connor Company Superfund Site carried out on April 20, 

2010. This inspection was conducted in accordance with the draft Operations and Maintenance Plan 

dated June 2008. 

The site remains in good condition with a well established vegetative cover and stable slopes. The sewer 

line construction along Route 17 has been restored and the re-seeded areas show a good crop of grass. 

As a result of the sewer construction the paved access point used to bring equipment to MW-106A and B 

was excavated but not replaced. 

The beaver activity observed in the upland marsh appears to have ceased with the beavers possibly 

relocating. Some evidence of beaver-cut trees was observed near Riggs Brook, but this activity did not 

adversely affect the Site. 

Several of the well locks have become difficult to unlock due to rust and will be replaced. 

If you have any questions on this inspection, please contact me. 

RoV A. Koster, P.E. 

Project Coordinator 

Enclosures 

cc: Claudia Sait, MDEP 

An equal opportunity employer 

83 Edison Drive I Augusta, ME 04336 

tel (207) 623-3521 I fax (207) 626-9571 

www.cmpco.co m 

An Energy East Company 
O'Connor Inspection Checklist 

Inspector: 3cipe-T- ~XXf-^r Date: ®<4~dJD-'3®\0 

Weather :

 C-War . (rff Time: iQvQOnLn ^ 

MONITORING/OBSERVATION WELLS 

Well Locks 

Well Casing 

Condition Erosion 

Comments 

MW 104B No 600 J A) Qep\ar€>. \oCV_ 

MW106A ijo . 

MW 106B 

MW 501 4 flood Ai 

MW 502 V Ak 

MW 503 

MW 507A 4 

MW 508B 4 Ak 

OW 201B 

OW 202B Good Ak 

OW 302B €5 Ai 

RW101 

es JL 

Follow Up Action Required: 5 ^ CQwvimej^S 

04/23/2010 
Designated Area 

Boundary Markers Condition Comments 

PTA 

PTB 

PTC 

PTD 

PTE 

PTF 

PTG 

PTH flood 

PTI 

PTJ 

Follow Up Action Required: ^ 

Surface Soils 

CONDITION LOCATION (MARK ON ATTACHED MAP) 

Excessive Settlement - Ponding 

Erosion Rills |N)orve 

Vegetation - Stressed or Sparse 

Animal Burrows 

Tree and Shrub Encroachment on 

Designated Area 

AJo/UL 
Access Road 

Feature Condition Comments 

3 Excessive Rutting 

Erosion, Sloughing of Shoulders 

Other 

Follow Up Action Required: /0oAJ2_ 

CULVERTS AND SURFACE DRAINAGE 

Location Condition Comments 

Upland Marsh Culvert - Primary 

Upland Marsh Culvert - Overflow 

Upper Lagoon Culvert Outlet 

Swale Upper to Lower Lagoon 

Lower Lagoon Culvert Outlet 

Drainage Lower Lagoon to Riggs Brook Good ISbrw <,<vNodl QjO^r 

Follow Up Actions Required: 

UPLAND MARSH AND LAGOONS 

Location Feature Condition Comments 

Upland Marsh Side Slopes 

Vegetation Gooq 

Upper Lagoon Side Slopes 

Vegetation 

Good 

Good Lower Lagoon 

Side Slopes 

Vegetation 

Follow Up Actions Required: j\) Q p ^ 

\f\ slid nd- y louae/- l(U\oon dLrafngge d o feiyS vtV~tp£ • 

04/23/2010 
OTHER OBSERVATIONS/RECOMMENDED ACTIONS 

/Oak.: Pow^J dir^tXto^ j access d o /vwJ-toGtAr v~ 

Q^CHECK HERE IF ADDITIONAL INFORMATION IS ATTACHED ~ Pho^o S 

Inspector's Signature (\)UMJ : £W A Date: 0 T j^Q / /O 

04/23/2010 

O'Connor Site 

April 2010 
O'Connor Site 

April 2010 
O'Connor Site 

April 2010 

Photo 6 - Restoration of Sewer Installation near Riggs Brook