I SDMS DocID 552569 

CENTRAL MAINE 

POWER 

April 23,2013 

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 SETE 

INSPECTION REPORT - March 2013 

Dear Mr. Connelly: 

Enclosed is a copy of the inspection of the O'Connor Company Superfund Site carried out on March 28, 

2013. This inspection was conducted in accordance with the Operations and Maintenance Plan dated 

October 2009. 

The site overall is in very good condition. The cover vegetation is thick and healthy. No signs of erosion 

were noted on the slopes or drainage ditches. However, some gaps in the cover soil were noted east of 

the line between Points D and E of the Designated Area. These are in the area where a possible burrow 

hole was noted near Pt D in March of 2012 and repaired during the spring sampling event in April. The 

area with the soil gaps is outside the Designated Area and at the bottom of slope. Currently the area is 

very soft due to the wetness of the soil. We will have the area inspected by an engineer from Woodard & 

Curran to see if there is a recurring issue that can be corrected. The area will be restored and restabilized after this evaluation once the area can be driven on without causing rutting of the soil. 

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

Sincerely, 

Roy M. Koster, P.E. 

Project Coordinator 

Enclosures 

cc: Claudia Sait, MDEP 

Superfund Records Center 

SITE: __^U| ^ 

BREAK: 

OTHER: Z£L2AFT~ 

83 Edison Drive, Augusta, ME 04336 

Telephone 207.623.3521 ' IBERDROLA 

USA 

An equal opportunity employer 
O'Connor Inspection Checklist 

Inspector: /atw ^ou^cl i Date: 

Weather: V4> ° cloudy Time: 111 jo*** - I7*.3<*pr\ 

MONITORING/OBSERVATION WELLS 

Well Locks 

Well Casing 

Condition Erosion 

Comments 

MW 104B MO 

MW 106A ^L MW 106B 

MW 501 

MW 502 

MW 503 V AJ O 

MW 507A y y f j 0 

MW 508B y \S_ A/ O 

OW201B 

OW 202B 

AJ Q 

OW 302B C o rJO 

RW 101 AJ Q 

Follow Up Action Required: o 

04/08/2013 
Designated Area 

Boundary Markers Condition Comments 

PTA 

PTB 

PTC 

PTD 

PTE GOO 6 

PTF 

PTG 

PTH 

PTI (I Q 6 4 

PTJ 

Follow Up Action Required: 

A/on t 

Surface Soils 

CONDITION LOCATION (MARK ON ATTACHED MAP) 

Excessive Settlement - Ponding 

Erosion Rills 

A J o AJ e 

Vegetation - Stressed or Sparse 

Animal Burrows 

AJ o ^ e 

Tree and Shrub Encroachment on 

Designated Area AJ O/V 

04/08/2013 
Access Road 

Feature Condition Comments 

Excessive Rutting 

Erosion, Sloughing of Shoulders 

Other 

Follow Up Action Required: 

CULVERTS AND SURFACE DRAINAGE 

Location Condition Comments 

Upland Marsh Culvert - Primary G o o e> 7HT 

Upland Marsh Culvert - Overflow 

Upper Lagoon Culvert Outlet a. 

Swale Upper to Lower Lagoon 

Lower Lagoon Culvert Outlet ^ O C) 

Drainage Lower Lagoon to Riggs Brook 

Follow Up Actions Required: 

UPLAND MARSH AND LAGOONS 

Location Feature Condition Comments 

Upland Marsh Side Slopes 

Vegetation 

go & Upper Lagoon Side Slopes 

Vegetation 

Lower Lagoon 

Side Slopes 

Vegetation 

Follow Up Actions Required: 

04/08/2013 
OTHER OBSERVATIONS/RECOMMENDED ACTIONS 

VfcHECK HERE IF ADDITIONAL INFORMATION IS ATTACHED 

^L^.^ K^Ji Date: H/ C 

Inspector's Signature 

04/08/2013 

O'Connor Site 

March 2013 

Photo 1 - Site Entrance 

Photo 2 - Upland Marsh 
Photo 4 - Lower Lagoon 
Photo 6-TWA II Area 
O'Connor Site 

March 2013 

Photo 7 - Soil Cover Gaps east of Pts D and E