UGI Development Company 

September 1, 201 0 

CERTIFIED MAIL NO. 7005 1820 0003 5498 3032 

Mr. Craig Dufficy 

US Environmental Protection Agency (5304P) 

1200 Pennsylvania Avenue, NW 

Washington, DC 20460 

RE: UGI DEVELOPMENT COMPANY 

HUNLOCK POWER STATION 

REQUEST FOR INFORMATION SECTION 104 

Dear Mr. Dufficy, 

390 Route 11 

P.O. Box 224 

Hunlock Creek, PA 18621-0224 

(570) 830-1269 

UGI Development Company., Hunlock Power Station is submitting the required information 

from your letter dated August 24, 2010. 

If you should have any questions, please contact me at (570) 542-5369 Ext. 232. 

Sincerely, 

~~~ 

Jeffrey T. Steeber 

Engineer II 

Hunlock Power Station 

JTS:chet 

Enclosure 
UGI Development Company 

Hunlock Power Station 

Enclosure A 

1. UGI Development Company, Hunlock Power Station's Storage Impoundments 

are not listed under the National Inventory of Dams. 

2. The impoundments were commissioned in the mid 1960's. 

3. Fly Ash, Bottom Ash and Boiler Slag are temporarily stored in the 

impoundments. 

4. According to the 1957 Ash Settling Basins and Ash Disposal Area Drawing the 

drawing was stamped by a Registered Professional Engineer. Because the 

impoundments were built in the 1960's it is difficult at this time to determine if 

they were constructed by a professional engineer. The impoundments are 

inspected by UGI personnel on a routine basis. 

5. No official assessments by a Professional Engineer of the impoundments have 

been conducted in the past 10 years. However, the impoundments are observed by 

UGI personnel on a regular basis. Additionally, Hunlock Power Station 

permanently shut down their coal fired boiler and two storage impoundments on 

May 22, 2010. The impoundments have been dewatered and are no longer in 

service. UGI is currently working with Pennsylvania Department of 

Environmental Protection (P ADEP) to officially close the impoundments. 

6. P ADEP inspected the impoundments during a routine inspection in 2008. This 

was not an official structural integrity inspection. There was not a written report 

from PADEP. No safety issues were identified. 

7. PADEP inspected the impoundments during a routine inspection in 2008. This 

was not an official structural integrity inspection. There was not an official 

written report. No safety issues were identified. 

8. According to the Ash Settling Basins and Ash Disposal Area drawing dated June 

12, 1963 the surface impoundment identified as the East Basin (003) on the 

drawing, was constructed to contain 71 ,300 cubic yards. The surface 

impoundment identified as the West Basin (005) on the drawing, was constructed 

to contain 73,500 cubic yards. Both surface impoundments together have the 

capacity to contain 144,800 cubic yards. Impoundment 003 is approximately 4.65 

acres and 005 is approximately 4.79 acres. The maximum height for 

impoundment 003 is approximately 25ft. The maximum height for impoundment 

005 is 10ft. 
9. There have been no spills or releases from the Hunlock Power Station in the past 

10 years. 

10. Owner/Operator- UGI Development Company 

One Meridian Blvd. 

Suite 2C01 

Wyomissing, Pa. 1961 0 

Contact: Mike Mara, Director 

Power Plant Operations & Project Development 

One Meridian Blvd. 

Suite 2C01 

Wyomissing, Pa. 19610 

(610) 373-7999 Ext. 175 

I certify that the information contained in this response to EPA's request for information 

and the accompanying documents is true, accurate, and complete. As to the identified 

portions of this response for which I cannot personally verify their accuracy, I certify 

under penalty of law that this response and all attachments were prepared in accordance 

with a system designed to assure that qualified personnel properly gather and evaluate the 

information submitted. Based on my inquiry of the person or persons who manage the 

system, those persons directly responsible for gathering the information, the information 

submitted is, to the best of my knowledge, true, accurate, and complete. I am aware that 

there are significant penalties for submitting false information, including the possibility 

of fines and imprisonment for knowing violations. 

Signature~ Name: Pete Quattrini 

Title: Manager- Power Production