Hydrogen Sulfide Changes 7-2010

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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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    MEETINGTOPIC: CHANGESREGARDINGHYDROGENSULFIDE DATE: ______________

    LOCATION/DEPARTMENT: ___________________________________________________________

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    B y s ig n i n g t h i s sh e e t y o u a r e a c k n o w l e d g i n g p a r t i c i p a t i o n in t h i s t r a i n i n g .

    SAFETYMATTERS