Fifteen persons have been arrested in connection with drug dealing and stolen property trafficking at the Walter Reed Army Medical Center in Northwest Washington, District police and Army officials said yesterday. They said at least six more arrests are expected.

D.C. police Chief Maurice T. Turner Jr. said the arrests capped a three-month undercover investigation, dubbed "Operation Sterilize," that recovered more than $200,000 in drugs and stolen property. He said the investigation identified six separate illegal operations at the hospital: two dealing in cocaine, one in LSD, one in PCP, one in marijuana and one in stolen property. The investigation was conducted by members of the 4th police district vice unit, the Army's Criminal Investigation Command, the military police of Walter Reed Hospital and Prince George's County police.

Police said six of the persons arrested are military personnel assigned to the hospital, five are civilian employes and four are not affiliated with the hospital.

Lt. Col. Douglas Little, the hospital's provost marshal, said most of the civilian employes who were arrested worked in the hospital's food services and property management departments. He said the highest ranking military person arrested was a sergeant first class.

Officials said that no patients were involved. They said that most of the drugs were brought to the hospital from outside the District, and that only one -- a diuretic called Lasix, which is sometimes taken in an effort to foil drug urinalysis tests -- came from within the hospital complex.

The stolen property consisted primarily of office equipment, such as typewriters and calculators, officials said.

Police and hospital officials identified the military personnel arrested in connection with the investigation as David Lee Miller, 21, charged with distribution of cocaine; Ricardo Mantorani Calderon, 24, charged with distribution of cocaine; Daryle Eugene Manuel, charged with possession of cocaine; Robert Lee Hill, 26, charged with distribution of LSD; Jerome Flack, charged with distribution of a prescription drug without a license; and Troy McIntyre, charged with distribution of a prescription drug without a license.

Civilian hospital employes arrested in connection with the investigation were identified by police as Eugene E. Munday, possession of cocaine; Samuel L. Barnhardt, 36, of 4612 Kirkwood Place, Hyattsville, charged with distribution of cocaine; Darnell Newell, 32, of 1618 Riggs Rd., Hyattsville, charged with distribution of marijuana; Derick J. Gardner, 23, of 1002 K St. NE, charged with trafficking in stolen property; and Maurice M. Matthews, 35, charged with trafficking in stolen property.

Persons not affiliated with the hospital who were arrested as a result of the investigation were identified as Keith Eric Donaldson, 23, of 1517 Ray Rd., Hyattsville, charged with distribution of cocaine and a weapons violation; Robert Washington Chung, 21, of 1517 Ray Rd., Hyattsville, charged with distribution of cocaine; Delma Van Fox, 37, of 621 Sheridan St., Hyattsville, charged with distribution of marijuana; and Ricardo Tabbs, 29, of 714 Sixth St. SE, charged with distribution of PCP.