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. 2013 Dec 6;4:367. doi: 10.3389/fmicb.2013.00367

Table 1.

Chemo-physical formation water characteristics and DNA content of the studied wells.

Well Fracture history Times fractured pH Alkalinity (meq.liter−1) [Cl] (M) [Na+] (M) CH4OH (mM) [DNA] (ng L−1)
A3-11 Slick water and foam fractured 3 6.97 10.6 1.72 1.26 16 1500
B1-12 Foam fractured 1 6.56 12.5 1.51 1.13 0.1 4750
C1-12 Foam fractured 1 6.69 13 1.73 1.29 4 1000

For more detailed information about the well water chemistry see Supplementary Tables S1, S2.