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October 2004 -25- 043-2170 <br />• 4.2.9 Temperature Monitorin¢ <br />Golder monitored ambient air temperatures using a HOBO Pro Series data logging thermometer. <br />Temperatures were measured every 30 minutes. The lowest and highest daily temperatures are <br />summazized in Table 2. <br />During placement of SF, when the ambient air temperature was less than 32°F for longer than 1 hour <br />in the previous 24 hours, Golder was required to monitor the fill temperatures at depths of 3 inches <br />and 6 inches, at a frequency of 6 tests per acre, and calculate the average fill temperature from the <br />lower temperature of the 3-inch and 6-inch tests. SF was placed throughout the spring and summer of <br />2003 and 2004 when temperatures were greater than 32°F; therefore, no SF temperature monitoring <br />occurred during construction of the Phase Nc OSA. <br />r <br />L <br />I• <br />~m~vnow~w~art-pneerv~-xwra°xna.aao.uwsc.neu~v~aa Golder Associates <br />