A liquid tank includes a liquid chamber for holding liquid and an absorption chamber containing an absorber for absorbing and holding the liquid. The system comprises a card holder identification card having a printed code identifying the card holder. The method includes dispensing the sealer composition into a pitch pocket formed around a roof penetration and allowing the sealer composition dispensed into the pitch pocket to cure by exposure to moisture in the air. The frame is in thermal contact with the part of the electronic components and with the front surface of the circuit card at least at edge areas thereof, so as to conduct heat generated by the electronic components, via the edge areas of the front surface to the edge areas of the rear surface of the circuit card. To account for possible movement of the person causing misregistrations in the time series, the C data can be obtained two or more times throughout the time series while still at lower frequency than in prior techniques with alternating L and C data sets.