Air

(particulate filter)^e

Gross alpha^c

4.74 x 10^-16 µCi/mL

2 x 10^-14 µCi/mL

Gross beta^d

1.46 x 10^-15 µCi/mL

3 x 10^-12 µCi/mL

Specific gamma (¹³⁷Cs)

1.69 x 10^-16 µCi/mL

4 x 10^-10 µCi/mL

²³⁸Pu

1.77 x 10^-18 µCi/mL

3 x 10^-14 µCi/mL

^239/240Pu

9.93 x 10^-19 µCi/mL

2 x 10^-14 µCi/mL

²⁴¹Am

5.02 x 10^-18 µCi/mL

2 x 10^-14 µCi/mL

⁹⁰Sr

4.00 x 10^-17 µCi/mL

9 x 10^-12 µCi/mL

Air (charcoal cartridge)^e

¹³¹I

1.58 x 10^-15 µCi/mL

4 x 10^-10 µCi/mL

Air

(atmospheric moisture)

³H

59.3 pCi/L_water

1 x 10^-7 µCi/mL_air

Air (precipitation)

³H

102.8 pCi/L

2 x 10^-3 µCi/mL

Milk

¹³¹I

0.63 pCi/L

--

¹³⁷Cs

1.17 pCi/L

--

³H

54.1 pCi/L

--

⁹⁰Sr

0.34 pCi/L

--

Lettuce

¹³⁷Cs

63 pCi/kg

--

⁹⁰Sr

32.4 pCi/kg

--

Potatoes

¹³⁷Cs

1.34 pCi/kg

--

⁹⁰Sr

1.4 pCi/kg

--

a      The MDC is an estimate of the concentration of radioactivity in a given sample type that can be identified with a 95 percent level of confidence and precision of plus or minus 100 percent under a specified set of typical laboratory measurement conditions.

b      DCGs, set by the DOE, represent reference values for radiation exposure.  They are based on a radiation dose of 100 mrem/yr for exposure through a particular exposure mode such as direct exposure, inhalation, or ingestion of water.

c      The DCG for gross alpha is equivalent to the DCGs for ^239,240Pu and ²⁴¹Am.

d      The DCG for gross beta is equivalent to the DCGs for ²²⁸Ra

e      The approximate MDC is based on an average filtered air volume (pressure corrected) of 445 m³/week.