1. TOXIC TRACE METALS IN SURFACEWATERS
Aluminum Pb
Lead Sb
Antimony Mn
Manganese As
Arsenic Hg
Mercury Ba
Barium Ni
Nickel Be
Beryllium Se
Selenium Cd
Cadmium Ag
Silver Cr
Chromium Tl
Thallium Cu
Copper Zn
Zinc
>10, to 10, to < 1

2. 1997 All previous water column metals data were considered unreliable.
1998 Adopted new water quality standards for dissolved metals.
The new WQS were orders of magnitude below previous reporting levels.
Mercury had the lowest WQS at 12 parts per trillion!
1997 to 1999 VADEQ developed an ultra low level sample collection method.
Virginia Division of Consolidated Laboratory Services developed ultra low methods of analyses.

6. Since 1998 we have collected 1639 samples at 500 locations.
Locations include Elizabeth River, Acid Mine Drainage Sites, Probabilistic Sites, Gulf Stream, Mid Atlantic Ocean, Gulf of Thailand and remote mountain streams on the Island of Ko Kood, South China Sea.
The dissolved trace element concentrations are the same worldwide except where anthropogenic sources contribute. Examples are the Elizabeth River and acid mine drainage sites.

9. Roger E. Stewart II restewart@deq.state.va.us