hydrogen sulfide changes 7-2010
TRANSCRIPT
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CCCHANGESHANGESHANGESRRREGARDINGEGARDINGEGARDINGHHHYDROGENYDROGENYDROGENSSSULFIDEULFIDEULFIDE
Provided by IMA, Inc. for the exclusive use of our clients. www.imacorp.com
Information provided by Jeff CitroneRisk Control Consultant, IMA of Colorado.
All IMA recommendations are purely advisory to help clients identify and effectively control exposures to loss. We do not infer or imply in the making of recommendations and comments that all possible hazardnoted or to indicate that other hazards do not exist. The maintenance of safe premises, operations and equipment, the avoidance of unsafe conditions and practices, and compliance with Federal, State and locstatutes and laws are the sole responsibility of the client.
limit of 50 ppm. Exposure at the STEL should not
repeated more than four times per day with at le
60 minutes between successive exposures in
range. OSHA does not recognize the ACGIH gui
lines.
Although compliance with the ACGIH standards is mandatory, it is often believed that these standa
represent best health and safety management pr
tices. Therefore the fear4 exists that if a worker
comes seriously ill or injured from an alleged ex
sure may utilize the ACGIH TLV and STEL in a cou
room situation.
HOWDOESTHISCHANGEWHATWEDO?Currently field monitoring for hydrogen sulfide
volves using an instantaneous read instrument a
setting a ceiling ex-posure limit. These
trends in field moni-
toring for hydrogen
sulfide exposure are
based on the previ-
ous ACGIH TLV of
10 ppm, the Na-
tional Institute of
Occupational Safety
and Health (NIOSH) recommended short-term ex
sure limit of 10 ppm, or the OSHA instantaneous cing exposure limit of 20 ppm. The majority of oilf
operators and service companies currently set
alarm limit of 10 ppm hydrogen sulfide for workers
their locations, establishing that workers evacuat
location if that alarm level is exceeded. If oilfield
erators and service companies were to follow the n
In February, 2010 the
American Conference
of Governmental Indus-
trial Hygienists (ACGIH)
changed the threshold
imit value (TLV) and the
short-term exposure
imit (STEL) recommen-
dation for hydrogen sul-
fide. The TLV was
changed from 10 parts
per million (ppm) to 1 ppm, and the STEL was
changed from 15 ppm to 5 ppm.
The ACGIH is a professional association of industrial
hygienists and practitioners of related professions,
with a goal to advance worker protection by providing
timely, objective, scientific information to occupa-tional and environmental health professionals. ACGIH
establishes TLVs for chemical substances and physical
agents. The TLV of a chemical substance is a level to
which it is believed a worker can be exposed day af-
ter day for a working lifetime without adverse health
effects. The STEL of a chemical substance is a level to
which it is believed that a worker can be exposed for
no longer than 15 minutes four times a day or less
where that worker should not show adverse health
effects. The recommended TLVs and STELs are devel-
oped as guidelines for use by trained professionals,and are not intended for use as legal standards.
WHYCOMPLY?OSHA does not establish a TLV for hydrogen sulfide.
OSHA has established a 10-minute ceiling exposure
imit of 20 ppm and an instantaneous peak exposure
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SAFETYMATTERS
Provided by IMA, Inc. for the exclusive use of our clients. www.imacorp.com
Information provided by Jeff CitroneRisk Control Consultant, IMA of Colorado.
All IMA recommendations are purely advisory to help clients identify and effectively control exposures to loss. We do not infer or imply in the making of recommendations and comments that all possible hazardnoted or to indicate that other hazards do not exist. The maintenance of safe premises, operations and equipment, the avoidance of unsafe conditions and practices, and compliance with Federal, State and locstatutes and laws are the sole responsibility of the client.
ACGIH guidelines, they would lower this ceiling guide-
ine to 1 ppm hydrogen sulfide.
The instruments currently used by the oilfield opera-
tors and service companies to monitor hydrogen sul-
fide exposures to their employees may not all be ca-
pable of accurate detection at levels below 1 ppm.Each currently used instrument would have to be
evaluated for its applicability for use with the lower
imits. At a minimum the current instruments will
have to be re-calibrated and re-alarmed to the lower
evels.
In addition to evaluating the ceiling limits an em-
ployee may be exposed to, it may also be necessary
to evaluate the full-shift and short-term time-
weighted average hydrogen sulfide exposure of the
employee with respect to the lower TLV. This evalua-
tion would involve collection of a larger set of datautilizing classic industrial hygiene sampling tech-
niques, or at a minimum instruments with data-
ogging capabilities. This is not always currently done.
TRAININGIf your company does adopt the new ACGIH gui
lines, all affected personnel will need to have th
H2S training updated.
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CCCHANGESHANGESHANGESRRREGARDINGEGARDINGEGARDINGHHHYDROGENYDROGENYDROGENSSSULFIDEULFIDEULFIDE
Provided by IMA, Inc. for the exclusive use of our clients. www.imacorp.com
Information provided by Jeff CitroneRisk Control Consultant, IMA of Colorado.
All IMA recommendations are purely advisory to help clients identify and effectively control exposures to loss. We do not infer or imply in the making of recommendations and comments that all possible hazardnoted or to indicate that other hazards do not exist. The maintenance of safe premises, operations and equipment, the avoidance of unsafe conditions and practices, and compliance with Federal, State and locstatutes and laws are the sole responsibility of the client.
PORQUSEDEBENACATAR?OSHA no estipula un TLV para el cido sulfhdr
OHSA estableci un lmite tope de exposicin de
minutos de 20 ppm y un lmite mximo de exposic
instantnea de 50 ppm. Una exposicin al STEL
debera repetirse ms de cuatro veces al da, conmenos 60 minutos entre exposiciones sucesivas
este intervalo. OSHA no reconoce las directrices de
ACGIH.
Si bien no es obligatorio el acatamiento de las n
mas de la ACGIH, a menudo se cree que estas n
mas representan las mejores prcticas de gestin
salud y seguridad. Por consiguiente, existe el tem
que si un trabajador se enferma o se lesiona gra
mente debido a una presunta exposicin, que
pueda utilizar el TLV y el STEL de la ACGIH en un
bunal.
CMOMODIFICAESTOLOQUEHACEMOS?En la actualidad, la
supervisin de cam-
po del cido sulfh-
drico conlleva el
uso de un instru-
mento lector ins-
tantneo y la esti-
pulacin de un lmi-
te tope de exposi-cin. Estas tenden-
cias en la supervisin de campo para la exposicin
cido sulfhdrico se fundamentan en el previo TLV
la ACGIH de 10 ppm; el Instituto Nacional de Seg
dad Ocupacional y Salud (NIOSH, por sus siglas
En febrero de 2010,
la Convencin de
Higienistas Industriales
Gubernamentales de los
EE.UU. (ACGIH, por sus
siglas en ingls) modi-
fic la recomendacin
del valor umbral lmite
(TLV, por sus siglas en
ngls) y del lmite de
exposicin a corto plazo
(STEL, por sus siglas en ingls) para el cido sulfh-
drico. El TLV fue modificado de 10 partes por milln
(ppm) a 1 ppm y el STEL fue modificado de 15 ppm a
5 ppm.
La ACGIH es una asociacin profesional de higienistas
ndustriales y practicantes de profesiones afines, conel objetivo de hacer progresar la proteccin laboral
por medio del suministro de informacin oportuna,
objetiva y cientfica a profesionales en salud ocupa-
cional y ambiental. La ACGIH estipula los TLV para
sustancias qumicas y agentes fsicos. El TLV de una
sustancia qumica es un nivel al que se cree que un
trabajador puede exponerse das tras da durante una
vida de trabajo sin efectos adversos para la salud. El
STEL para una sustancia qumica es un nivel al que se
cree que un trabajador puede exponerse durante no
ms de 15 minutos, cuatro veces al da o menos, conel cual el trabajador no debera manifestar efectos
adversos para la salud. Los TLV y STEL recomenda-
dos se han desarrollado como directrices para ser uti-
izadas por profesionales capacitados y no se preten-
de que se usen como normas legales.
CCCAMBIOSAMBIOSAMBIOSCONCONCONRRRESPECTOESPECTOESPECTOALALALCIDOCIDOCIDOSSSULFHDRICOULFHDRICOULFHDRICO
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SAFETYMATTERS
Provided by IMA, Inc. for the exclusive use of our clients. www.imacorp.com
Information provided by Jeff CitroneRisk Control Consultant, IMA of Colorado.
All IMA recommendations are purely advisory to help clients identify and effectively control exposures to loss. We do not infer or imply in the making of recommendations and comments that all possible hazardnoted or to indicate that other hazards do not exist. The maintenance of safe premises, operations and equipment, the avoidance of unsafe conditions and practices, and compliance with Federal, State and locstatutes and laws are the sole responsibility of the client.
ngls) recomend un lmite de exposicin a corto
plazo de 10 ppm; o el lmite tope de exposicin ins-
tantnea de OSHA de 20 ppm. La mayora de los ope-
rarios y empresas de servicio de los yacimientos pe-
trolferos actualmente fijan un lmite de alarma de 10
ppm de cido sulfhdrico para trabajadores en susugares, estipulando que los trabajadores deben eva-
cuar un lugar si ese nivel de alarma se sobrepasa. Si
os operarios y las empresas de servicios de los yaci-
mientos petrolferos fueran a acatar las nuevas direc-
trices de ACGIH, reduciran esta directriz de limites
mximos a 1 ppm de cido sulfhdrico.
Es posible que no todos los instrumentos que actual-
mente utilizan los operarios y empresas de servicio
de los campos petrolferos para supervisar las exposi-
ciones de cido sulfhdrico en sus empleados puedan
detectar con precisin a niveles inferiores al 1 ppm.Cada uno de los instrumentos actualmente en uso
tendra que ser evaluado para determinar su aplicabi-
idad para ser utilizados con los lmites ms bajos.
Como mnimo, los instrumentos actuales tendrn que
volverse a calibrar y fijar sus alarmas de conformidad
con los niveles ms bajos.
Adems de evaluar los lmites tope a los que pu
exponerse un empleado, es posible que tambin
necesario evaluar la exposicin promedio de tiem
ponderado al cido sulfhdrico, a turno completo
corto plazo, del empleado con respecto al TLV m
bajo. Esta evaluacin conllevara la recopilacin denmero mayor de datos, utilizando tcnicas clsi
de muestreo de higiene industrial o, como mnim
instrumentos con capacidades para registro secu
cial de datos. En la actualidad, esto no siempre
hace.
ADIESTRAMIENTOSi su empresa en efecto adopta las nuevas directri
de ACGIH, todo los empleados afectados tendrn
recibir una capacitacin actualizada de H2S.
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SAFETYMATTERS
Provided by IMA, Inc. for the exclusive use of our clients. www.imacorp.com
Information provided by Jeff CitroneRisk Control Consultant, IMA of Colorado.
All IMA recommendations are purely advisory to help clients identify and effectively control exposures to loss. We do not infer or imply in the making of recommendations and comments that all possible hazardnoted or to indicate that other hazards do not exist. The maintenance of safe premises, operations and equipment, the avoidance of unsafe conditions and practices, and compliance with Federal, State and locstatutes and laws are the sole responsibility of the client.
FFFACTSACTSACTSAAABOUTBOUTBOUTHHHYDROGENYDROGENYDROGENSSSULFIDEULFIDEULFIDE
FlammableColorless gas
Toxic, even at extremely low concentrations
Heavier than air and can accumulate in low-lying areas
Smells like rotten eggs
Can cause you to quickly lose your sense of smell at loconcentrations
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SAFETYMATTERS
Provided by IMA, Inc. for the exclusive use of our clients. www.imacorp.com
Information provided by Jeff CitroneRisk Control Consultant, IMA of Colorado.
All IMA recommendations are purely advisory to help clients identify and effectively control exposures to loss. We do not infer or imply in the making of recommendations and comments that all possible hazardnoted or to indicate that other hazards do not exist. The maintenance of safe premises, operations and equipment, the avoidance of unsafe conditions and practices, and compliance with Federal, State and locstatutes and laws are the sole responsibility of the client.
DDDATOSATOSATOSAAACERCACERCACERCADELDELDELCIDOCIDOCIDOSSSULFHDRICOULFHDRICOULFHDRICOInflamable
Gas incoloro
Txico, incluso en concentraciones sumamente bajas
Ms pesado que el aire y puede acumularse en reas pdebajo del nivel del mar
Huele a huevos podridos
Puede hacerle perder rpidamente su sentido del olfato e
concentraciones bajas
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