Document 3QyZx2R9brmNKVK0DwwJ7NGL0
-n ' ',/w Astsd/
i f~-'" '' '' ('''' *'
V. ---' *-- -'V.v
' `^jyr^-ggyvtft *,
^
/ .,
It, i i,C* b VA E i t L.' W
fc i If ft jb.it i c i/C. b- i vis E
m oAf Af /A L
i/i
/Ax.
To Prom Oste Subject
R* H. Gerlacli ?. L. Fetser July 17, 1974 Ambient Air Analysis
Mils
Hendrik Abel
/ ,Vv a ,< 'VyAr 4/ #>J' / \\S,, V*A >f.
^v, ^ p/'/ V* in: .-.,,V f . VA /./o . /*T' i'r1
ty; Air, ;' i.. <',.ij- it- >,j
Loading 7-14,13-74 / /Jt A j ' P ,.rv
The short loading time of the Mils Hendrik Abel only permitted a our- /)/ \ /
tailed sampling program. Personnel dosimeters and "Century*1 total
' /
hydrocarbon readings were obtained on most of the leading operations, '/ \
The vent recover:; unit, the lyUrcquincnc addition atop and arcs, grid
'1
analyses v/ere not obtained.
A summary of the loading operation with all pertinent data is attached t
Xhe docbnen pointed out some problems that need our attention and these .arc listed below.
X. A bleed line from the sight glass to the vent exhaust line to elimi nate the vinyl vapors whenever the sight glass is blown dawn 'bo reed the level in the recovery tank..
The block valve on the suction line to th; compressor leaks badly and should be examined before the next shJ o loading.
The jrydroquinone addition did not work properly as a positive pressure existed on the ton ball valve vA an the nitrogen educr,or was operating. This caused any hydroquirrw.e trapped in the ball ^valve to bo blown to the atmosphere when evening the valve for u
n /.?7//uUt-<t^+' 'f\ ^
.w J4,Zt'&//
nent in the cargo sampling was obtained by using the new sampling cylinders. Only fifteen minutes were required to sample both tanks and the vinyl emissions vrere generally below 50 ppm as evidenced by the
charcoal dosimeter results, 7.75 ppm.
'v - ^ Conflicting data was obtained on the flange removal operation when the "Century" readings were below 20 ppm total hydrocarbons while the per sonnel dosimeter result showed the VCM exposure to be 192 ppm. This operation will be monitored closely on the next ship, Hoegh. Shield, which is scheduled for July 21.
vve 00OI9SS 4
TABLE I PERSONNEL EXPOSURE NILS HENDRIK ABEL INNING 7-14,15-74
JOB
Vent Hose Connection Unblinding Hose Heel Sample Ship loading Hose Flange
Blinding
POSITION
DocHttfdi Doelman Shift Foreman Doc Email Doelman
TIME INTERVAL
.75 .167 .25 2.25 1.33
T.7A - PHvi YQA
jrjvw DOST>'OTi7;>3
733* ~ 192.1 ):
7.75^ 7.49 2.55
* Protected with fresh air mash.
Vvc ooi955s
3
SUMMARf OF PT3UL7S Nils Hendrik Abel loading 7-14,15-74
CONNECTING VENT LINES
FIANCE REMOVAL
HEEL CAMPLES
SHIP LOADINGS FINISHED CARGO
SAMPLING
LOADING HOSE DISCONNECTION and FLANGE INSERTION
Century readings v.'cre not obtained-tut the personnel dosimeter result was low, 0.33 ppm VCM.
Century readings rema5.ned below 20 ppm throughout this operation. Hcwevc-r, contradicted data was obtained from the personnel dosimeter which shewed 192 ppm VC?'. This step v'i.ll be monitored closely on the next snip loading.
A few leaks still remdn on the camp!leg apparatus. The new bomb valves worked fine keeping the V'CM concentration during sampling below 50 ppm. Troublo was experienced during disconnecting the sampling apparatus as the eductor would back pressure resulting in vinyl rrissiors High total hydro carbon readings, 1.0, were ootainec on the Ccntv.irj analyser when this occurred. Closing the vent line from each tank permitted the unit to work satisfactorily. Significant improvement wan noted for this operation as it required only fifteen minutes to sample both tanks and the charcoal dosimeter data showed only 7.8 ppm.
No Century analyzer readings were taken. Charcoal dosimeter,data showed 7.5 ppm VCM.
Century readings were low, less than 50 ppm, The
new sample cylinders and valves improved id c. sam
pling time as it required only 15 minutes
both
samples.
The eductor system worked properly as was evidenced by low Century total hydrocarbon valves, loos than 20 ppm during entire operation. Personnel dosimeter data obtained showed 2.6 ppm. VCM during this operation.
VVC 000019556