PERSONNEL HAZARDS ASSOCIATED WITH EXPOSURE TO HYDROGEN

File: 970107_sep96_decls1_0002.txt
Page: 0002
Total Pages: 3

Subject: PERSONNEL HAZARDS ASSOCIATED WITH EXPOSURE TO HYDROGEN          

Unit: USS MIDWAY  

Parent Organization: NAVCENTCOM  

Box  ID: BX300023

Folder Title: FOLDER 3 MESSAGE FILES FOR 14-19 FEB 1991                                                       

Document Number:          5

Folder Seq  #:         40






                                      UNCLASSIFIED

                                     ii Fh i 0 re " :F i

   SMN 061437






   Bt (U) IT l@ IMPORTANT TO NOTE ALSO THAT THE CANISTERS WILL NOT
   PROTECT AGAINST GASES RELEASED IN A                 ARBON MONOXIDET







   39      EFFECTS OF HYDROGEN SU4FIDE:
   Ao (U) HYDROGEN SULFIDE IS A HIGHLY TOXIC GAS (COMPARABLE IN
   TOXICITY TO HYDROGEN CYANIDE) WITH A DISTINCT ODOR OF ROTTEN
   EGGS* HYDROGEN SULFIDE IS RELEASED INTO THE ATMOSPHERE PRIMARILY
   AS A GAS IN THE IMMEDIATE VICINITY OF AN OIL WELL DISCHARGE OR
   WHERE A WELLHEAD EXP40SION HAS OCCURREDO SOME HYDROGEN SULFIDE IS
   DISSOLVED IN THE CRUDE OIL AND GRADUALLY RELEASEDO HOWEVER THE
   CONCENTRATION IS INSIGNIFICANT COMPARED TO THE GAS RELEASED
   DIRECTLY INTO THE ATMD$PHEREL IF THE OIL WELL IS ON FIREO THE
   INCINERATION AND THERMAL EFFECTS RENDER THE HYDROGEN SULFIDE
   ESSENTIALLY HARMLES$O
   80-ft) THE HYDROGEN SULFIDE HAZARD TO NAVY PERSONNEL SHOULD BE
   MINIMAL SINCE SIGNIFICANT CONCENTRATIONS ABOVE THE THRESHOLD LIMIT
   VALUE CTLV) FOR EXPOSURE GENERALLY EXIST ONLY IN THE IMMEDIATE
   VICINITY OF AN OIL WELL DISCHARGE,
   Co @ THE WHETLERITE CHARCOAL IN THE Cl AND C2 CANISTERS USED WITH
   THE MK V AND MCU-2/P SERIES PROTECTIVE MASKS WILL PROVIDE
   PROTECTION FROM HYDROGEN SULFIDEI     HYDROGEN SULFIDE ODORS MAY BE
   DETECTED IN CONCENTRATION$ OF AS LITTLE AS 10"50 PARTS PER BILLION
   (PPB)O WELL BELOW THE TLV FOR EXPOSURE VALUE OF 10 PARTS PER
   MILLION (PPM), ACCORDINGLYO IF INDIVIDUALS WEARING PROTECTIVE
   MASKS DETECT THE ODOR OF ROTTEN EGGSO BREAKTHROUGH HAS OCCURRED AND
   THE CANISTERS SHOULD BF CHANGEDE IT IS IMPORTANT TO NOTEE HOWEVERO
   THAT THIS INDICATION DOES NOT LAST @ONGE SINCE THE NOSE BECOMES
   DESENSITIZED TO H26 RATHER OUICKLY EVEN AT VERY LOW CONCENTRATIONST
   THIS ALSO MEANS THAT IF EXPOSED AND THE NOSE IS DESENSITIZED TO
   H2S BEFORE DONNING THE MASKO BREAKTHROUGH WILL NOT BE DETECTEDT
   4* t" FIRE HAZARD;
CAN CREATE VERY LARGE SPILLS
   BUT ONLY A RELATIVELY SMALL AREA CAN BURN9 AS THE OIL SPREADS FROM
   THE SOURCEO THE LIGHTERO MORE VOLATILE HYDROCARBONS READILY
   EVAPORATE/VAPORIZE'q   BEYOND A SHORT DISTANCE FROM THE SOURCE THE
   OIL CANNOT BE IGNITED AS THE 014 LAYER/SLICK BECOMES 80 THIN THAT
   HEAT 13 DISSIPATED TOO RAPIDLY INTO THE UNDERLYING WATER TO SUPPORT
   COMBUSTION OF THE HEAVIER HYDROCARBONS REMAINING FROM THE CRUDE
   OlLe TESTS WITH DISTILLATF FUEL (JP"S) ON A FLAT SOLID SURFACE
   SHOW THAT FOR A RATE OF $PILL OF lOOoOOO GALIMINO THE DIAMETER OF

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                                     UNCLASSIFIED

Document 3 f:/Week-35/BX300023/FOLDER 3 MESSAGE FILES FOR 14-19 FEB 1991/personnel hazards associated with exposure to hy:0102970948532
Control Fields 17
File Room = sep96_declassified
File Cabinet = Week-35
Box ID = BX300023
Unit = USS MIDWAY
Parent Organization = NAVCENTCOM
Folder Title = FOLDER 3 MESSAGE FILES FOR 14-19 FEB 1991
Folder Seq # = 40
Subject = PERSONNEL HAZARDS ASSOCIATED WITH EXPOSURE TO HY
Document Seq # = 5
Document Date =
Scan Date =
Queued for Declassification = 01-JAN-1980
Short Term Referral = 01-JAN-1980
Long Term Referral = 01-JAN-1980
Permanent Referral = 01-JAN-1980
Non-Health Related Document = 01-JAN-1980
Declassified = 02-JAN-1997