Fairfax County police charged former Fairfax County school psychologist Arthur S. Pomerantz yesterday with six additional counts of child sexual abuse, including one allegedly involving a youth he had counseled.

Pomerantz's roommate, Edward Buss, 42, was charged with five counts of child sexual abuse stemming from incidents involving the same children, police said.

The new charges against Pomerantz, 46, and Buss result from alleged crimes that took place from 1982 to 1985 involving three Fairfax County youths aged 13 and 14 at the time, Officer Connie J. Curran said. One youth was a student Pomerantz counseled while he was a school psychologist, she said. Pomerantz resigned in 1984.

Pomerantz's first arrest Aug. 16 -- four years after Prince William police investigated him on similar charges -- prompted a broad investigation by school and county officials of school personnel procedures. Superintendent Robert R. Spillane announced new policies Sept. 9 to encourage more aggressive investigations of child sexual abuse allegations and said he hoped to have annual criminal record checks of all school employes.

Pomerantz, already free on $20,000 bond on earlier charges, was freed on $6,000 bond yesterday. Buss was freed on personal recognizance. Both are to be arraigned today.

The new charges against Pomerantz include one of indecent liberties, three of sodomy, one of aggravated sexual battery and one of sexual abuse. Buss was charged with two counts of sodomy, two of sexual abuse and one of indecent liberties. Pomerantz turned himself into police; Buss was arrested at their Falls Church home.

Pomerantz was arrested Aug. 16 on a charge of sexual battery involving a school-aged boy, and arrested again this month on a sodomy charge allegedly involving another youth. Buss also was arrested this month on a similar charge.

The new charges stem from a continuing police investigation that includes identifying youths in photographs found in Pomerantz's home, Curran said. Prince William County police told Fairfax County school officials in 1981 they were investigating Pomerantz on suspicion of child sexual abuse. They eventually did not charge him because, they said, they could not put a precise date on a photograph of Pomerantz allegedly committing an illegal sex act.

But Spillane told a news conference this month that even though police did not charge Pomerantz, school officials should have been more aggressive in their own investigation and not waited for police to act.

Spillane said Pomerantz resigned last year under an agreement with his lawyers not to mention the police investigation in his personnel file, but the superintendent said that file would be amended to include his arrest record.