PHILADELPHIA (CBS/AP) — The National Transportation Safety Board says the engineer involved in a deadly Amtrak crash in Chester last year had marijuana in his system. That was just one of the findings in a report out Wednesday.

The train was heading from New York to Savannah, Georgia, when it struck the backhoe in Chester, about 15 miles outside of Philadelphia.

READ MORE: 4 People On Way To Prom Party Injured In West Philadelphia Quadruple Shooting, Police Say

The NTSB says the backhoe was not supposed to be on that track.

Officials: Engineer From Chester Amtrak Crash Tested Positive For Marijuana

READ MORE: Philadelphia School District Postpones Plans To Push Back School Start Times

The report also says the backhoe operator had cocaine in his system at the time of the crash, and the supervisor tested positive for pain medications, including oxycodone.

Backhoe operator Joseph Carter Jr., 61, and supervisor Peter Adamovich, 59, were killed and 40 train passengers were hurt.

(TM and © Copyright 2017 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2017 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)

MORE NEWS: Robert Atkins Charged In 1991 Cold Case Murder Of Joy Hibbs In Bucks County

‘Supervolcano’ Under Yellowstone May Have Planet-Killing Potential