Development and Research:
Hexavalent Chromium Field Speciation Method
CLICK PHOTOS FOR AN ENLARGED VERSION
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![Hexavalent chromium field speciation supplies](photos/cr_vi/sampling_supplies_s.jpg)
Hexavalent chromium field speciation supplies
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![Hexavalent chromium field separation](photos/cr_vi/separation_s.jpg)
Hexavalent chromium field separation
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![USGS scientists collecting water from Sheep Creek, which drains the San Gabriel Mountains toward the Sheep Creek Fan](photos/cr_vi/Sampling01_s.jpg)
USGS scientists collecting water from Sheep Creek, which drains the San Gabriel Mountains toward the Sheep Creek Fan
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![Close-up of the mafic Pelona Schist, the formation that is a potential source of chromium contamination in the aquifer underlying the Sheep Creek Fan, California](photos/cr_vi/BigRock02_s.jpg)
Close-up of the mafic Pelona Schist, the formation that is a potential source of chromium contamination in the aquifer underlying the Sheep Creek Fan, California |
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Inside view the USGS's mobile laboratory truck showing instrumentation for the on site determination of chromium VI with an ion chromatograph (EPA Method 218.6) |
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USGS scientists collecting and processing ground-water samples at Edwards Air Force Base, California |
USGS scientist measuring on-site parameters of ground water samples at Edwards Air Force Base, California |
USGS scientist collecting a well sample at 29 Palms Marine Base, California |
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