Table 3
Upton Groundwater: Exceedances of MCLs
Field Loc
ID
Client ID
Parameter
(1)
Result
Wyoming
Domestic
(3)
Primary
MCL
(4)
Secondary
MCL
(4)
Units
UMW-01
UMW01-GW-
04242012
Gross Alpha
(2)
21.6
15
15
pCi/L
Iron
0.68
0.3
0.3
mg/L
Manganese
1.18
0.05
0.05
mg/L
UMW-02
UMW02-GW-
03142012
Gross Alpha
(2)
79.2
15
15
pCi/L
Gross Beta
(5)
68.8
50
pCi/L
Manganese
0.14
0.05
0.05
mg/L
UMW-04
UMW04-GW-
04252012
Gross Alpha
(2)
62.6
15
15
pCi/L
Iron
0.38
0.3
0.3
mg/L
Manganese
0.302
0.05
0.05
mg/L
USMW-01
USMW01-GW-
05242012
Gross Alpha
(2)
131
15
15
pCi/L
Manganese
0.106
0.05
0.05
mg/L
Nitrogen, Nitrate
as N
14.4
10
mg/L
Nitrogen,
Nitrate+Nitrite as N 14.9
10
mg/L
Selenium
0.073
0.05
0.05
mg/L
Uranium
0.167
0.03
mg/L
USMW-02
USMW02-GW-
05242012
Gross Alpha
(2)
106
15
15
pCi/L
Manganese
0.486
0.05
0.05
mg/L
Radium 228
(2)
7.6
5
5
pCi/L
Uranium
0.0986
0.03
mg/L
USMW-03
USMW03-GW-
05242012
Arsenic
0.012
0.05
0.01
mg/L
Manganese
1.3
0.05
0.05
mg/L
Selenium
0.19
0.05
0.05
mg/L
Uranium
0.0609
0.03
mg/L
Notes:
(1)
Units are in mg/L, unless otherwise indicated
(2 )
Requirements and procedures for the measurement and analysis of gross alpha particles activity, Radium 226 and Radium 228
shall be the same as requirements and procedures of the U.S. Environmental Protection Agency, National Interim Primary
Drinking Water Regulations, EPA-570/9-76-003, effective June 24, 1977.
(3)
WDEQ - Water Quality Rules and Regulations, Chapter 8 - Groundwater Standards - Class I Domestic, page 9
(
)
(4)
EPA Primary and Secondary MCLs for Drinking Water -
(5)
California Water Resources Control Board, Division of Water Quality, Groundwater Ambient Monitoring and Assessment (GAMA)
Program, Rev. August 21, 2008, Groundwater Information Sheet, Radionuclides. The Gross Beta MCL is no longer an official
regulatory level, but is still in use as a trigger for EPA and California Department of Health additional testing.
