Exposure to Pesticides How personnel are exposed to pesticides and what to do about it – safety...

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


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


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


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


Location of test patches and air sampler on body and clothes of volunteers in the studies – all volunteers had the same sample patch locations


Bypass details


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 *


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


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


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


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


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


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


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


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


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)


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


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 How personnel are exposed to pesticides and what to do about it – safety...

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