DEQ-CFW_00058170

R VALUE,� ADDED
FACT GHEE: REVISED
VAL UE � ) REMOVED
kote: September 20, 1984
Surface Water Qualityw
Standard Documentation
notes
Gasses ,, ;A- 0.1. ionic silver.
Class
2. EPA. 1980. water quality criteria far silver. USEPA,.
Wash., D.C.
o criteria derived to prevent chronic toxicity.
—using r A Y A AY i�
a
-t 50, 100, and 200 ppe hardness the ANQC are 2a 2, 4.1,
and 13 , respectively.
salt water 2. /
DEQ-CFW 00058170

1982. Report of the Aquatic Scosystow :Objectivesittee.
International Saint .c * legional Office, Windsor, Out. 31
oM
-realfirmied recommended objective for silver in l (1978).
-noted that, eve though it is clear that Ionic silver Is the toxic
..e, equilibrium with all complexing agents may not OCAMT near
effluents, sulfide say occur In vary low concentrations In natural
waters, and weak Inorganic complexes Toy pelt "free" silver to
occur at concentrations close to 0.1 l�
t l such time tbat a reliable nathod is available to oessure
'free' ilver at concentrations as low as € .1 US/1 I3C recommends
jimitinS as total silver.
. &, -Lytle, � Z� 1984. rate and speciation of silver in publicly mad
tr"tomt works. Envir. loam g Chu .21- .
' ® -LeAlanc, at al. 1984. The influence of speciation an the toxicitY
of silver to fathoad sinam m...�, . ��. . ? - Ravir. Toe.
Chem. is bm
-both .:R'.. report : 3 > ionic silverlow as : ,M
012
wX/l in toxicity tests and " high " 0.05: ug/l below effluentsusing the pAg method, citing Chudd for the methodology.
-L,*Bl:auc at (1984) concluded that freesilver ion Was 6
tiftes
sort toxic than the most toxic Q other R }:Y'.lexes tested.
Standard Derivation
DEQ-CFW 00058171

F.
DEQ-CFW 00058172