pCi/L to pCi/g

Can anyone help me? If someone is requesting a detection limit of 8 pCi/L on water samples and would like the equivalent detection limit for sludge samples with density of 0.7372g/cc, what would the detection limit be for the sludge samples in pCi/g??? I calculate 0.01085pCi/g and that seems low to me.

[Robert Fogt]

0.7372 g/cc = 0.7372 kg/L

8 pCi/L / 0.7372 kg/L = 10.85187 pCi/kg

10.85187 pCi/kg / 1000 = 0.01085187 pCi/g

I came out with the same as you.