ENVIRONMENTAL CONTAMINANTS ENCYCLOPEDIA ...

one. Work on the replacement for the
Gold Book [302] was underway in March of
1996.
Oak Ridge National Lab, 1994: Ecological Risk
Assessment Freshwater Screening Benchmarks for
concentrations of contaminants in water [649]. For
a definition of meaning of each benchmark, see
entry entitled: Benchmarks, Ecological Risk
Assessment Screening Benchmarks. To be considered
unlikely to represent an ecological risk, field
concentrations should be below all of the following
benchmarks [649]:
Note: Although most of the lab tests done to
develop water quality criteria and other
benchmarks were originally based on "total"
values rather than "dissolved" values, the lab
settings were typically fairly clean and the
numbers generated by the lab tests are
therefore often even more comparable to field
"dissolved" values than to field "total"
values (Glen Suter, Oak Ridge National Lab,
Personal Communication, 1995). For more
information on dissolved vs. total
concentrations, and EPA suggested conversion
fractions for metals, see entry entitled
"Dissolved."
NAPHTHALENE (micrograms per liter, ug/L):
353 = SECONDARY ACUTE VALUE
23.4 = SECONDARY CHRONIC VALUE
620 = LOWEST CHRONIC VALUE - FISH
1163 = ESTIMATED LOWEST CHRONIC VALUE -
DAPHNIDS
33,000 = LOWEST CHRONIC VALUE - AQUATIC PLANTS
450 = LOWEST TEST EC20 - FISH
> 600 = LOWEST TEST EC20 - DAPHNIDS
1000 = POPULATION EC2O
The maximum permissible concentration of
naphthalene in fishery waters in the USSR is 4
ug/l.; (Mosevich MT et al; Izv Gos Nauchno-Issled
Inst Ozern Rechn Tyb Khoz 109: 50 (1976) as cited
in USEPA; Ambient Water Quality Criteria Doc:
Naphthalene p.C-31, Draft, 1980) [366].
W.Plants (Water Concentrations vs. Plants):
Inhibition of photosynthesis of a freshwater, nonaxenic
unialgal culture of Selenastrum
capricornutum at: 1% saturation: 110% (14)C