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L ATLANTICENVIRONMENTAL
Solvents RecoverySouthington, Connecticut
024539
November 4,1988PROJ. 0650-0597
1.0 INTRODUCTION
An industrial hygiene survey was conducted by Atlantic
Environmental, Inc. at Solvents Recovery Service in Southington
Connecticut, on November 4, 1988. The purpose of the survey was to
determine employee exposure to solvent vapors.
2.0 OBSERVATIONS
Operations at this plant consist of recovering solvents from
waste products such as inks, dyes, and waste paints. The operations
consist of receiving 55 gallon drums of waste material, debunging
the drums, dispersion of waste solvents by resuspending waste paints
into solution using a high speed mixer, and vacuum pumping the waste
materials out of the drums and into storage tanks.
3.0 SAMPLING EQUIPMENT AND METHODS
Personal air monitoring was conducted on employees to determine
their actual 8 hour time weighted average (TWA) exposures to the
various solvent vapors. The solvents in question, and their
respective sampling and analytical methods are as follows:
Page 1
JAN 2 6 19
024540 ATLANTIC
i mmm ' ENVIRONMENTAL ^ Solvents Recovery November 4,1988
Southington, Connecticut PROJ. 0650-0597
TLV's PPM
1) Methyl ethyl Jcetone 200 590 Methyl isobutyl ketone 50 205 Butyl acetate 150 710 Ethyl acetate 400 1400 Toluene 100 375 Xylene 100 435 Acetone 750 1780 Stoddard Solvent 100 525 Methlene chloride 100 350 Trichloroethylene 50 270 III Trichloroethane 350 1900 Perchloroethylene 50 335
Personal air monitoring for these compounds was accomplished by
employing battery powered air sampling pumps to draw a known volume
of air through activated charcoal sorbent tubes. These tubes were
then sent to MDS Laboratories (AIHA No. 135) for analysis by gas
chromatography, in accordance with NIOSH P&CAM No. 127
TLV's PPM mg/m-3
2) Isopropanol 400 980 Butanol 50 150 Methyl Cellosolve(2 Methoxyethanol) 5 16
Page 2
024541 ATLANTIC
' ENVIRONMENTAL *• Solvents Recovery November 4,1988
Southington, Connecticut PROJ. 0650-0597
Personal air monitoring for these compounds was conducted by
employing the 3M Organic Vapor Monitor #3500, a passive dosimeter.
These monitors were clipped to the employee's shirt lapel and worn
throughout the entire work shift.
The organic vapor monitors were sent to MDS Laboratories for
analysis, in accordance with NIOSH P&CAM Nos. S-65, S-66, and S-79.
TLV's PPM mg/m
3) Methanol 200 260
Only area monitoring for methanol was conducted. These samples
were taken at 2 separate locations outside adjacent to the
dispersion area. The samples were collected by drawing a known
volume of air through silica gel tubes. These sorbent tubes were
analyzed for methanol by MDS Laboratories in accordance with NIOSH
P&CAM No. S-59.
4.0 RESULTS
All ACGIH-Threshold Limit Values (TLV's) were used to determine
if an individual's exposure to the various solvents were in excess
of recommended limits. In order to determine if the employee's
overall exposure to these chemicals were within the TLV's, we had to
look at each of these chemicals as presenting additive effects.
Page 3
024542 ATLANTIC
ENVIRONMENTAL Solvents Recovery November 4,1988 Southington, Connecticut PROJ. 0650-0597
Therefore, we employed the ACGIH recommended formula for determining
TLV's for mixtures. The general formula, where air is analyzed for
each component, for the TLV of the mixture is:
C2/T2+ C3/T3C1/T1+ + ''' ="n"
C-j = concentration of vapor found in the sample T-L = ACGIH Threshold Limit Value for this chemical
If "n" is found to be greater than 1, then the mixture is
considered to be in excess of the TLV.
We have designated "Eq Exp", or equivalent exposure, for the
TLV mixtures listed in the tables. Any "Total Eq. Exp" listed in
the tables which are less than "1" indicate that the individual was
exposed to solvent concentrations within the recommended TLV mixture
(See Sampling Results).
Page 4
024543 ATLANTIC
ENVIRONMENTAL Solvents RecoverySouthington, Connecticut
Tables Key
Table Listing
MEKMIBKBut AcetateEth AcetateTolueneXyleneStod SolvMethyl Chlor1,1,1 TriTrichlorPERKIsopropanolButanolMetyl CellMethanol
November 4,1988 PROJ. 0650-0597
Chemical Name
Methyl Ethyl Ketone Methyl Isobutyl Ketone
Butyl Acetate Ethyl Acetate
Toluene Xylene
Stoddard Solvent Methylene Chloride
1,1,1 Trichloroethane Trichloroethylene
Perchloroethylene Isopropyl Alcohol
Butyl Alcohol Methyl Cellosolve
Methyl Alcohol
"<" means less than laboratory detectable limit "Eq Exp" means equivalent exposure "Total Eq Exp" means total equivalent exposure
Page 5
024544 ^ ATLANTIC ^ ENVIRONMENTAL
^ Solvents Recovery November 4,1988 Southington, Connecticut PROJ. 0650-0597
5.0 CONCLUSION
Each chemical sampled and analyzed for was considered as having
an additive effect on the human body. Therefore, based on the ACGIH
recommended formula for determining TLV's for mixtures, equivilent
exposure values found to be greater than 1 indicate exposure levels
in excess of the TLV.
All samples collected on October 28, 1988 were found to have
total equivilent exposure values less than 1, indicating that the
additive exposure levels were below the TLV. In addition, each
individual chemical which was monitored during this survey was found
to be below their respective TLV's.
Page 6
V
024545 ATLANTIC
, __ l ENVIRONMENTAL Solvents Recovery November 4,1988
Southington, Connecticut PROJ. 0650-0597
SURVEY PERFORMED BY AND REPORT WRITTEN BY:
PAULA.VALVO
REPORT REVIEWED BY:
>e\v$A DAVID S.PEARSON, C\\f
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