Video of the workers https://youtu.be/npHWrYAbMwQ

Thank you for flagging this. It is a real worker health and safety issue, as well as bad for the neighbors.

John Heilner - Princeton Human Services Commission

This is the van and it's license plate that appear around the minute mark in the video to unload more concrete slabs.

Thank you for submitting your request; your issue is being reviewed.

Property was visited by Senior Registered Environmental Health Specialist, Randy Carter. Inspector Carter observed no dust at the time of his investigation. Inspector Carter spoke to the Site Manager about proper rock/concrete saw cutting techniques, and how water should always be used to reduce levels of airborne dust. The Site Manager informed Mr. Carter that a 'blue stone' being used for a walkway/patio was being cut. Inspector Carter also informed the Site Manager that a particulate mask/n95 should always be used when working with such equipment. Inspector Carter issued a verbal violation to the Site Manager. The Site Manager informed Inspector Carter no future cutting will be performed on site without the use of dust reducing techniques.

The issue that you submitted has been addressed and we are now closing this. Should you need anything further, please feel free to submit another request or you may contact Access Princeton at 609-924-4141.

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I thank you and appreciate that you addressed this issue today, directly with one of the people responsible. I'm not exactly sure what a "verbal violation" is, other than a "slap on the wrist" and a "heads up" to them that they've been found out. My 8 minutes of video reveals only a fraction of a procedure that was performed by them that went on for hours over a period of several days. The reason that no dust was found is that it is so very fine that it has been spread around the entire neighborhood - that and the fact that they appear to have completed the cutting work yesterday. The NJ.GOV online .pdf document about this issue ( http://nj.gov/health/surv/documents/dry_cutting.pdf ) explains that "dust levels can remain high for some time even after cutting, grinding, or sweeping has stopped." I walked around the neighborhood yesterday, early evening (a regular activity of mine), and could detect in breathing the air around the Westminster Choir College and around the block had fine grit and particular matter. This same document sites "New Jersey law (N.J.S.A. 34:5-182) prohibits dry cutting and dry grinding of masonry materials." - which - if you watch and listen to the 8 minutes of video I took yesterday was EXACTLY the law that was broken in this case.