### UGI Development Company

September 1, 2010



### CERTIFIEDMAILNO. 7005 1820 0003 5498 3032 Mr. CraigDufficy US Environmental ProtectionAgency (5304P) 1200 PennsylvaniaAvenue, NW Washington, DC 20460


### RE: UGIDEVELOPMENTCOMPANY HUNLOCKPOWERSTATION REQUESTFORINFORMATIONSECTION104
DearMr. Dufficy, 390 Route 11 P.O. Box 224 Hunlock Creek, PA 18621-0224 (570) 830-1269

UGI Development Company., HunlockPower Stationis submittingthe required information from your letter dated August24, 2010. Ifyou shouldhave any questions, please contact me at (570) 542-5369 Ext. 232.
Sincerely,

# ~~~ Jeffrey T. Steeber Engineer II HunlockPower Station
JTS:chet Enclosure

### UGI Development Company HunlockPowerStation
EnclosureA
1. UGI Development Company, Hunlock Power Station's Storage Impoundments are not listed underthe National Inventory ofDams. 2. The impoundments were commissioned in the mid 1960's. 3. Fly Ash, Bottom Ash and Boiler Slag are temporarily stored inthe 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 constructedby a professional engineer. The impoundments are inspected by UGI personnel on a routine basis. 5. No official assessments by a Professional Engineer ofthe impoundments have been conducted in the past 10 years. However, the impoundments are observed by UGI personnel ona 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 PennsylvaniaDepartment of Environmental Protection (PADEP) to officially close the impoundments. 6. PADEP 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) onthe drawing, was constructed to contain 71,300 cubic yards. The surface impoundment identified as the West Basin (005) onthe 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 maximumheight for impoundment 003 is approximately 25ft. The maximum height for impoundment 005 is 10ft.9. There have been no spills orreleases from the Hunlock Power Station in the past 10 years. 10. Owner/Operator- UGI Development Company One Meridian Blvd. Suite 2C01 Wyomissing, Pa. 19610 Contact: Mike Mara, Director PowerPlant Operations & Project Development One Meridian Blvd. Suite 2C01 Wyomissing, Pa. 19610 (610) 373-7999 Ext. 175

I certify that the information contained inthis response to EPA'srequest for information and the accompanying documents is true, accurate, and complete. As to the identified portions ofthis response for which I cannotpersonally verify their accuracy, I certify under penalty oflaw 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 onmy inquiry ofthe person orpersons who manage the system, those persons directly responsible for gathering the information, the information submitted is, to the best ofmy knowledge, true, accurate, and complete. I am aware that there are significantpenalties for submitting false information, including the possibility offines and imprisonment for knowing violations.

# Signature~ Name: Pete Quattrini Title: Manager- PowerProduction