health and safety plan solid waste management unit assessment

~RALJLIC FLUID 68-32
the constituents, and even the constituents themselves, will vary with
time and distance from the site of initial contamination due to
weathering. The major component categories in hydraulic fluids have
been identified as the following:
Straight and branched chain aliphatic hydrocarbons (paraffins)
Cycloparaffins
Aromatic hydrocarbons
Organic esters
Polyglycols
Phosphate esters
Silicones and silicate esters
A combination of capillary column gas chromatography (GC) and gas
chromatography/mass spectrometry (CC/MS) techniques may. be used to
identify the principal components in hydraulic fluids. Oil samples,
and any samples collected in the field which are primarily organic in
nature, may require separation (prior to GC or GC/HS analysis) using
liquid solid column chromatography; the various column eluates, with or
without dilution in carbon disulfide, can then be analyzed by CC or
GC/MS techniques. Aqueous samples need to be liquid-liquid extracted
with an appropriate solvent (e.g., trichlorotrifluoroethana) prior to
analysis: solid samples would be extracted with trichlorotrifluoroethane
using soxhlet or sonication methods. An aliquot of the sample
extract, with or without concentration, could then be analyzed by CC dr
GC/HS for the specific components of interest. (Sampling and analysis
considerations for some specific components possibly present in
hydraulic fluids, i.e., benzene, toluene, xylenes, ethyl benzene,
naphthalena, TOCP and ethylene glycol, have been addressed in previous
chapters.)
Alternatively, the "oil and grease" content can be measured. This
determination would not be the measurement of an absolute quantity of a
specific component but rather the quantitative determination of groups
of components with similar physic%1 characteristics (i.e., common
solubility in trichlorofluoroethane). The oil and grease content is
defined as any material recovered from extraction with trichlorotrifluoroethane
and measured gravimetrically; the extraction methods are
those described above for aqueous and soil samples.
A detection limit for hydraulic fluids cannot be determined; the
detection limit for specific components is expected to be in the range
of pg/L for aqueous samples and pg/g for non-aqueous samples.
6/87