exposure to pesticides how personnel are exposed to pesticides and what to do about it – safety...
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Exposure to Pesticides
How personnel are exposed to pesticides and what to do about it – safety equipment and common sense
Exposure to Pesticides:Common Routes
Dermal – Skin Hands Arms Face & Head Eyes
Oral – mouth & gasterointestinal tract Inhalation – nose & lungs For humans – dermal is the most significant
route of exposure
Exposure to Pesticides:Common Routes
Safety equipment is available to minimize dermal exposures Face shields or goggles, eyewash bottles Hard hats Long sleeved shirts, long pants & waterproofed boots Tyvek coveralls Nitrile gloves Soap and water
Exposure to Pesticides:Common Routes
Safety equipment is also available to minimize inhalation exposures Face masks Nasal filters Gas masks
Generally are not necessary Fumigation projects or enclosed spaces may
require this form of protection
Exposure to Pesticides:R-8 Exposure Studies
So,
what does this mean in the field??
Forest Service R8 contracted with the Georgia Tech Research Institute, Environmental Health
and Safety Division
to perform field dermal exposure studies
Exposure to Pesticides:R-8 Exposure Studies
Three studies conducted North Georgia – directed foliar application of
Garlon 4
North Georgia – Clayton; and South Carolina – Savannah River Plant site & Edgefield RD – Directed foliar application of Roundup
Kentucky – London, Somerset & Stearns RD – Streamline basal bark application of Garlon 4
Exposure to Pesticides:R-8 Exposure Studies
Location of test patches and air sampler on body and clothes of volunteers in the studies – all volunteers had the same sample patch locations
Exposure to Pesticides:R-8 Exposure Studies
Exposure to Pesticides:R-8 Exposure Studies
Exposure to Pesticides:R-8 Exposure Studies
Exposure to Pesticides:R-8 Exposure Studies
Exposure to Pesticides:R-8 Exposure Studies
Bypass details
Exposure to Pesticides:R-8 Exposure Studies
Three studies conducted
North Georgia – Clayton; and South Carolina – Savannah River Plant site & Edgefield RD – Directed foliar application of Roundup
North Georgia – directed foliar application of Garlon 4 *
• Kentucky – London, Somerset & Stearns RD – Streamline basal bark application of Garlon 4 *
Exposure to Pesticides:R-8 Exposure Studies
North Georgia, foliar Garlon 4, Site 1 – 2 – 3’ brush and herbaceous undergrowth Mixing – Nurse tank Solo backpack with wand, 2503 tips 5 diaphragm and 1 piston pump Rubber gloves to mix, leather gloves worn
during application
Exposure to Pesticides:R-8 Exposure Studies
North Georgia, foliar Garlon 4, Site 2 4 – 8’ brush with intermediate undergrowth Mixing – each backpack Solo backpack, Model 30 Gun jet, 2503 tip All diaphragm pumps
Return
Exposure to Pesticides:R-8 Exposure Studies
Kentucky – Streamline Garlon 4 – London 2 – 3’ brush, low density Mixing – 5 gal nurse tank Solo backpack, Model 30 Gunjet, DE2 tips 1 diaphragm & 3 piston pumps 4/4 wore leather gloves when applying
Exposure to Pesticides:R-8 Exposure Studies
Kentucky – Streamline Garlon 4 – Somerset 6’ brush, density greater than London Mixing – 5 gal nurse tank Solo backpack, Model 30 Gunjet, DE2 tips All (6) diaphragm pumps Only 1 of 6 wore (leather) gloves during
application 4 hours worked
Exposure to Pesticides:R-8 Exposure Studies
Kentucky – Streamline Garlon 4 – Stearns 8 - 10’ brush, density similar to Somerset Mixing – 5 gal nurse tank Solo backpack, Model 30 Gunjet, DE2 tips All (6) diaphragm pumps 4 of 6 wore gloves when applying
Return
Exposure to Pesticides:R-8 Exposure Studies
Clayton, Georgia Site; foliar Roundup 2-3’ tall, low-density brush Mixture in nurse tank Mixer wore Playtex latex gloves Solo backpack sprayers, Gunjet with 2503 tip 2/5 wore leather gloves during application; 3/5
no gloves
Exposure to Pesticides:R-8 Exposure Studies
Aiken, South Carolina; foliar Roundup 4 - 6’ tall brush Mixture in nurse tank Mixer wore latex gloves Solo backpack sprayers, Gunjet with 2503
tip 4/5 latex gloves, 1/5 leather gloves
Exposure to Pesticides:R-8 Exposure Studies
Edgefield, South Carolina; foliar Roundup 4 - 6’ tall brush Mixture in nurse tank Mixer wore neoprene gloves Solo backpack sprayers with wand, 2503 tip 5/5 wore cotton work gloves
Exposure to Pesticides:R-8 Exposure Studies
Triclopyr results similar to projections from the VMFEIS Streamline basal bark Garlon 4-- geometric mean
MOS from study – 262 (predicted 880) Directed foliar spray Garlon 4-- geometric mean
MOS of 153 (predicted 290) Glyphosate results nowhere near the projected
- but better than predicted Directed foliar spray of Roundup– geometric mean
of 155,204 (predicted 600)
Exposure to Pesticides:R-8 Exposure Studies
However Garlon 4 MOSs ran from 44 to 3515 with 2
of the 16 applicators having MOSs of <100 (44 & 53)
Garlon 3A MOSs ran from 23 to 845 with 5 applicators of the 22 having MOSs of <100 (18, 23, 26, 47, 65, & 83)
Roundup MOSs ran from 20,980 to 128,841
Exposure to Pesticides:R-8 Exposure Studies
So, as the triclopyr products show Individual performance in the field, and Individual sensitivity Led to some individuals receiving
unacceptably high doses of pesticide during application
Reasons for the high doses are unclear
Exposure to Pesticides:R-8 Exposure Studies