D.C. Police Chief Maurice T. Turner Jr. issued without comment late last night a summary of a probe of allegations of improprieties and possible criminal violations in the department's controversial drug screening program and announced reprimands for three policemen, including the department's third-ranking official.

In a prepared statement, Turner said that an in-house panel of three officials he appointed last summer to investigate the drug screening system found no basis for allegations of criminal violations raised last summer by two drug screening operators

"The investigative report clearly points out that the drug screening program remains intact; that no ill motives were discovered during the detailed investigation; and that there was no evidence that any of these incidents helped or injured any individual," Turner said in the statement.

The drug screening program has been under investigation since August when two workers at the clinic took allegations of serious flaws in the program to Mayor Marion Barry and U.S. Attorney Joseph E. diGenova. The workers, Vernon Richardson and Marguerite Anastasi, alleged that after receiving several phone calls from a top-ranking police official, clinic officials tampered with drug testing procedures on behalf of a favored lieutentent seeking promotion to captain and whose urine had tested positive for drugs.

In the statement, Turner said that the panel uncovered "several instances of negligence, oversight, deviations from procedures and poor judgment." He announced plans to reprimand Assistant Chief Carl V. Profator, whose administrative services bureau oversees the drug screening program and promotions, for "errant judgment" and "action {that} contributed to the preception that there are improprieties and favoritism in the department's drug screening programs."

The statement also said that Turner will reprimand Deputy Chief Jimmy L. Wilson, former head of the department's in-house watchdog, and Capt. Robert J. Noyes, a former official at the clinic.

Police sources said that Turner does not plan to release the panel's nine-volume report. Capt. William White III, a department spokesman, said last night that neither Turner nor any police officials would comment on the report.

Robert E. Deso, attorney for the Fraternal Order of Police, who detailed the allegations to Barry and diGenova last July, said last night that he not seen the report.

"It's bizarre to have a report that took this long to compile released at 10:30 at night on a holiday weekend," Deso said.

Letters of counseling, a lesser form of discipline than official reprimands, will be sent to Lt. Michael A. Irish for causing delays in urine testing and to Officer James E. Green, a drug screening operator, for leaving urine samples unrefrigerated, according to the statement.

Also faulted was whistleblower Anastasi for inaccurately labeling a urine sample. But in the statement Turner said "any action against Mrs. Anastasi has been held in abeyance" pending completion of a union grievance she and Richardson filed in September after they were temporarily suspended for taking their allegations to city officials.