Demolition and debris cleanup begin after massive SPS fire in Abington Township, Pa.

ABINGTON TWP., Pa. (WPVI) -- Crews are still responding to the massive fire that broke out four days ago at SPS Technologies in Abington Township, Montgomery County.

The fire department was still on the scene Friday to put out hotspots.

SPS Technologies says it has hired an outside firm to help with cleanup. They will be starting remediation work at the area schools before moving on to homes.

The EPA says, so far, it has not detected harmful levels of contaminants in the air or the water.

"Any fire you're going to have some contaminants. But to see the levels of decrease in contaminants of what is acceptable in the eyes of the EPA and the DEP, we were well beneath those levels," said Jenkintown Police Chief Tom Scott.

Police in Jenkintown will also canvas neighborhoods to identify any debris that may have fallen onto people's property.

"You don't know what it is and you're not supposed to touch it so it's just blowing around the yard," said Janice Hollinshead, who recalled the horror of the initial explosion and fire Monday night.

"It was a bad smell and it did hurt your eyes. The smoke coming down the street was quite incredible," she said.

"The night of the fire, we heard the explosions and we went outside and within a few minutes there was debris," said Jay Conners, Jenkintown borough council president, who also lives within the evacuation zone.

If you find any debris, authorities say do not touch it and to call 911 instead.

"I know there was concerns about asbestos. I was told by SPS officials today that they had done a remediation of the majority of their asbestos back in the 1990s," said Scott.