Central Maine Power 

May 11,2009 

Mr. Terrence Connelly 

Office of Site Remediation and Restoration 

U.S. Environmental Protection Agency 

1 Congress Street, Suite 1100 (HBT) 

Boston, MA 02114-2023 

RE: O'CONNOR COMPANY SUPERFUND SITE 

INSPECTION REPORT - April 2009 

Dear Mr. Connelly: 

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

April 23, 2009. This inspection was conducted during the monitoring well sampling activities 

undertaken at the site and in accordance with the draft Operations and Maintenance Plan dated 

June 2008. 

In general the site was found to be in good condition with one small area of erosion observed ju 

outside the Designated Area (DA), approximately 25 feet downslope of DA marker PTC. The 

eroded area occurred around a large rock in the cover soil, and was approximately 2 to 8 inches 

deep (deepest where the rock was removed). The rock was removed, and cover soil backfilled i 

the eroded area. There were also some signs of beaver activity in the upland marsh. 

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

Sincerely. 

Roy f . Koster, P.E. 

Project Coordinator 

Enclosure 

cc: Claudia Sait, MDEP 

An equal opportunity employer 

83 Edison Drive I Augusta, ME 04336 

tel (207) 623-3521 

www.cmpco.co m 

An Energy East Company 
Inspector: 

Weather: 

O'Connor Inspection Checklist 

Date: 

Time: CX>f 

MONITORING/OBSERVATION WELLS 

Well Locks 

Well Casing 

Condition Erosion 

Comments 

MW 104B Gncrt 

MW 106A X 

MW 106B 

MW 501 X 

MW 502 X Good 

MW 503 X CooJ 

MW 507A 

MW 508B V 

OW 201B 

OW 202B 

OW 302B 

RW 101 Q>ood 

Follow Up Action Required: 

05/11/2009 • 
Designated Area 

Boundary Markers Condition Comments 

PTA 

PTB 

PTC 

PTD 

PTE 

PTF 

PTG 

PTH 

PTI 

3Z PTJ 

Follow Up Action Required: 

Surface Soils 

CONDITION LOCATION (MARK ON ATTACHED MAP) 

Excessive Settlement - Ponding 

Erosion Rills 

Vegetation - Stressed or Sparse 

Animal Burrows 

A3 \(\ 

ai^<x erosion * o o 

/Ofri 

JO |ft 

Tree and Shrub Encroachment on 

Designated Area 

lO I ft 

05/11/2009 
Access Road 

Feature Condition Comments 

Excessive Rutting k Erosion, Sloughing of Shoulders 

Other 

Follow Up Action Required: 

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 

Follow Up Actions Required: 

UPLAND MARSH AND LAGOONS 

Location Feature Condition Comments 

Upland Marsh Side Slopes Goo? 

Vegetation 

Upper Lagoon Side Slopes 

Vegetation 

Lower Lagoon 

Side Slopes 

Vegetation 

Follow Up Actions Required: 

05/11/2009 
OTHER OBSERVATIONS/RECOMMENDED ACTIONS 

f^<wo\^d \^ra<e roc\C \r\ -eroded* OKa, oav) -^1(^(3 

[^CHECK HERE IF ADDITIONAL INFORMATION IS ATTACHED f KcHt) S 

Inspector's Signature ^V^MJ? ^ (^JU M

 Date :

 M ^^(o ^ 

05/11/2009 
SUPERFUND V \ \ \ \ l

 J \jfr- ' 

«\_>^: \ / / i SW. ••— • NYT>P^*]V*I^9GNAIED AREA 

% '~~-V2i****^^, ^ * v t \ 0 I / -PTI I —REVISED Iti—^lpED DESIGNATED AREA 

SITE BOUNDARY 

li//// 

\ \ ic\ o / fii i 

/ \ l V*. _. " / 

UJ»LAND.*IAT?SH i 

X 

+ 

PTA 

mp <\ \ \ \ff \\\\ 

i 1 M \ 

*»\\ \ 

' -o-sS 

\ I 

' r K ^ <•— ' \\\\ ~- H~\ • — 

f J f/f t 

Kftli/ Mi / / // / 

FREE PRODUCT OIL MONITORING LOCATION 

LONG TERM MONITORING LOCATION-SEMI ANNUAL 

LONG TERM MONITORING LOCATION—ANNUAL 

MONITORING WELL 

PIEZOMETER 

UPLAND MARSH GEOPROBE BORING LOCATION 

SURFACE WATER SAMPLING LOCATIONS 

DESIGNATED AREA MARKERS - SURVEYED 

BY EPRO 2002 

— SCRA 1997 DESIGNATED AREA 

REVISED 10-SIDED DESIGNATED AREA 

— SUPERFUND SITE BOUNDARY 

UQJEL 

TOPOGRAPHIC INFORMATION IS APPROXIMATE. 

TOPOGRAPHIC INFORMATION HAS BEEN 

COMPILED FROM ORIGINAL SITE PLAN AND 

1999 SURVEY OF REMEDIATED AREA 

/> —~. 

t i t I I ii/' n i ; ,' i i i / / in/f t \ / i ; 

i i / ii mi s \ \ 

' '// / " I _ 

wo" / 

\ \\ \ V e 

ROUTE 17 / 

Tn AUGUSTA 6 

jinn <M#Ub 

/ "* 5 U *

1

 i i ( / s / \\\\ \ 1 X \ i I /( I * i 

-

t PSi c I 

ROCKLAND l J?7 " > / f T « j( ^ TO ^OCKLIND I \ 5 ^ i 

fii 

4

J 

z 

Q 

Ld 

10 

S3 

o Q y 

U z D= 

o (n « 

b 

JOB NO: 2120CK.01 

DATE: JUNE 2007 

SCALE: AS NOTED 

FIGURE 4-1 
O'Connor Site 

April 2009 

Photo 2 - Upland Marsh 
O'Connor Site 

April 2009 

Photo 4 - Looking toward Riggs Brook Culvert 
O'Connor Site 

April 2009 

Photo 5 - Looking toward northern Riggs Brook 

Photo 6 - Beaver Activity in Upland Marsh 
O'Connor Site 

April 2009 

Photo 7 - Eroded area prior to replacement of soil