ENVIRONMENT (a) Squaw Creek ~<— @ Site past confluence of Little Sulphur Creek Big Sulphur Creek KEY —_ . Cobb Creek —_ * * e” © HotSprings Creek 10 *& Geothermal unit @ Sampling location 3 @ © (b) Boron (c) Sulfate Sampling ae rT trips wn i _— 100 Sulfate concentration — mg/! fs oo So o W465 ei Ly RS 185] fre _—— | O Boron concentration — mg/\ 2.0 3.848 |; 0.5 8 } Pier — 1 is he 7 6 5 83 11 12 4 10 3 Sampling location 9 2 20 3 Tributaries of Big Sulphur Creek (a) show Lstge elevated levels of boron (b) and sulfate (c) where the local watershedsare affected by deposition downwind from operating power plants. Although the aquatic wn au} ell 5 ony mt cst » are i} HAa | E 8 _ i 7 6 5 1112 4 10 3 Sampling location 9 2 #1 ecosystem at The Geysers may well be adapted to these relatively minor increases, this mode of transport and the ultimate fate of the mineral material chronically deposited at geothermal development sites must be investigated. 25 C3 co Little Geysers Creek