NORFOLK BIG DIG
  • Overview
  • Link for Meeting Calendar for Town
  • PIP Public Involvement Plan
  • Drone Images
  • Contamination LSP Reports by Mabbett
  • Weston & Sampson: LSP for Town
  • DEP
  • Lawrence Street Bridge and Causeway
  • Public Hearing Videos
  • Environmental Review ENF
  • Stay Involved
  • Silica Summary

Silica Facts Summary

  • Bedrock at site is RHYOLITE (Per DEP Response Action Outcome, 243 pages)
  • RHYOLITE has high SILICA content, as does granite
  • Silica is second most common element in the earth's crust 27.7%
  • Silica is found in many types of rock and ore
  • Exposure to even small particles of silica can cause silicosis, an incurable lung disease
  • www.cdc.gov/niosh/docs/97-118/default.html - SIlica: It's not Just Dust from CDC
  • www.osha.gov/dsg/topics/silicacrystalline/ -OSHA Construction Standards issued September 23, 2017.  The ZBA should make sure the levels are monitored at the site. 

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  • Overview
  • Link for Meeting Calendar for Town
  • PIP Public Involvement Plan
  • Drone Images
  • Contamination LSP Reports by Mabbett
  • Weston & Sampson: LSP for Town
  • DEP
  • Lawrence Street Bridge and Causeway
  • Public Hearing Videos
  • Environmental Review ENF
  • Stay Involved
  • Silica Summary