Daniel M. Pepelko

Research Engineer

Daniel M. Pepelko, 31, a research engineer at the Environmental Protection Agency, died Sept. 5 at his home in Ann Arbor, Mich. He had anaplastic astrocytoma, a form of brain cancer.

Mr. Pepelko had been working for four years in Ann Arbor with the EPA's National Vehicle and Fuel Emissions Laboratory. He was part of a team developing and testing a fuel-efficient drivetrain for light trucks.

He was born in Cincinnati and moved with his family to Great Falls in 1985. He graduated from Thomas Jefferson High School for Science and Technology, where he ran cross-country and track and rowed crew. He graduated magna cum laude with a bachelor of science degree in mechanical engineering from Virginia Tech in Blacksburg. He later received a master of science degree in mechanical engineering from the University of Colorado at Boulder.

He was a member of the American Society of Mechanical Engineers, Society of Automotive Engineers and Saab Club of North America.

He completed two marathons. In February, during a period in which he was undergoing chemotherapy, he competed in a 10K snowshoe race.

Survivors include his parents, William and Barbara Pepelko of Great Falls; two sisters, Anne Jacobsen of Blacksburg and Dr. Katherine Pepelko of Great Falls; a brother, Douglas Pepelko of Reston; and his grandmother, Ethel Ahrens of Salt Lake City.

Hak-Ye Stone

Grocery Store Front-End Manager

Hak-Ye Stone, 48, a front-end manager and cashier for Safeway, died of breast cancer Aug. 30 at Capital Hospice's Halquist Memorial Inpatient Center in Arlington. She lived in Fairfax.

Mrs. Stone, a native of Seoul, was a 1976 graduate of Yong-Dong Po Girls High School in Seoul. After graduating, she was employed by U.S. Forces Korea, garrisoned in Yongsan, a district of Seoul. She immigrated to the United States and had lived in the Washington area since 1985.

She joined Safeway in 1988, working at stores in the Cherrydale section of Arlington and at the Twinbrook Shopping Center in Fairfax. In 2002, she received the company's East Coast division employee of the year award.

A member since 2000 of St. Stephen's United Methodist Church in Burke, she worked with preschool children and was a member of the Fellowship Committee.

Survivors include her husband of 19 years, Jack Stone of Fairfax; and two children, Samuel and Anne, also of Fairfax.

Hilda D. Calderwood

Church Member, Homemaker

Hilda D. Calderwood, 90, who was a homemaker and a member of St. Luke's Lutheran Church in Silver Spring, died of a heart attack Sept. 4 at Frederick Memorial Hospital.

Mrs. Calderwood, who was born in Altoona, Pa., moved to the Washington area in 1939 with her husband, who later joined the D.C. police department. During World War II, she worked for the U.S. Postal Service as a mail sorter. After the war, she became a homemaker and raised her children.

She was active in a number of organizations and had been an officer of the Chillum-Castle Lodge of the Order of the Eastern Star.

She lived in University Park and at Leisure World in Silver Spring before spending the past two years in a nursing home.

Survivors include her husband, Charles H. Calderwood of Frederick; two sons, Thomas Calderwood of Walkersville and James Calderwood Sr. of Chevy Chase; four grandchildren; and three great-grandchildren.