Here's the data from Scott, Alisa, Doug and Howie:

Last Week

12 feet from shore:  @30cm - 21cm,  @45cm - 9cm,  @60cm - 16.5cm
16.8 feet from shore:  @30cm - 46cm,  @45cm - 44cm, @60cm - 6.5cm
23 feet from shore:  @30cm - 2.5cm, @45cm - 9cm, @60cm - 15cm
26.9 feet from shore:  @30cm - 5cm, @45cm - 3cm, @60cm - 27cm

This Week

11 feet from shore:  @30cm - 4cm, @45cm - 8.5cm, @60cm - 5.5cm
16.8 feet from shore:  @30cm - 0cm, @45cm - 6cm, @60cm - 6cm
26 feet from shore:  @30cm - 8cm, @45cm - 2cm, @60cm - 1cm
29 feet from shore:  @30cm - 0cm, @45cm - 0.5cm, @60cm - 0.5cm
Next to Seepage Meter:  @30cm - 0.5cm, @45cm - 3cm, @60cm - 0.5 cm

Seepage Meter Data*

1.  560 mL
2.  1,320 mL
 

* Note - these data do not have the 1000 ml that was used to pre-fill the bags subtracted. (i.e. the first value will be negative - water was lost from the bag).

also the time for the first measurement was 60 minutes and for the second measurment was 52 minutes.