Naphthalene, C1 - National Park Service

W.Human (Drinking Water and Other Human Concern Levels):
No concern levels found; for information on
drinking water supply levels, see W.Typical Section
above.
Compare total naphthalenes to naphthalene
concentrations (see naphthalene entry).
W.Misc. (Other Non-concentration Water Information):
Naphthalene (the parent compound) was predicted not to be
phototoxic using QSAR estimates [891]. Alkyl PAHs often
(there may be exceptions) tend to be equally phototoxic
to the parent compound PAH (see "PAHs as a group" entry).
Information from on 2 methyl naphthalene from the HSDB
[366]:
Exposure of the dungeness crab (c magister) larvae
to seawater soln of the water sol fraction (wsf) of
cook inlet crude oil showed that the concn of
aromatic hydrocarbons in wsf was inversely related
to the degree of alkylation in naphthalene family,
but the acute toxicity of the aromatic cmpd was
directly related to the degree of alkyl
substitution. The seawater concn of 2methylnaphthalene
in water sol fraction of cook
inlet crude oil was 0.03 + or - 0.001 MG/L.
Sediment Data Interpretation, Concentrations and Toxicity (All
Sediment Data Subsections Start with "Sed."):
Sed.Low (Sediment Concentrations Considered Low):
No information found. Compare total naphthalenes to
naphthalene concentrations (see naphthalene entry).
Sed.High (Sediment Concentrations Considered High):
Methylnaphthalene (isomer not specified) was detected in
contaminated and non-contaminated estuarine sediments.
Reported average concentrations were 50.4 and 55.3 ppb
(ug/kg) methylnaphthalenes at 10 and 25 miles from an
offshore coastal multiwell drilling platform. The
concentration in nearby uncontaminated estuarine
sediments was 1.9 ppb (ug/kg) [766].
1-Methylnaphthalene was detected in 93.8 percent of
urban-bay samples in the Puget Sound area. The mean
concentration was 52.06 ug/kg dry weight (ppb), while the
median concentration was 52 ug/kg (ppb) [852].