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compaction point no.'s 375, 376, and 377 was below the 90% minimum (89.5%). Please provide <br />justification for the less than 90% pcf on Gob Pile #3 during the fourth quarter. <br />Instrumentation Report <br />Three inclinometers are installed on the lowermost bench of Gob Pile #2; measurements are made <br />quarterly. The results for this quarter indicate no significant movement has occurred. <br />Vibrating Wire Piezometers (VWPs) are installed at Gob Pile #2 (5) and at Gob Pile #3 (also 5). The VWPs <br />were installed and are monitored on a regular basis by Buckhorn Geotech (now by DOWL). In a letter <br />dated April 10th, 2014, the Division directed BRL to increase the monitoring frequency from quarterly to <br />monthly. BRL committed to the increase in a letter dated April 111h, 2014. Monthly monitoring was <br />continued through Oct -2014, with an additional quarterly reading taken on Janurary 6th, 2015 <br />(representing the 4th Qtr). By Email on Feburary 101h, 2015, the Division approved BRL's reverting to once <br />per quarter through the 1 I Quarter of 2016. VWP-06 showed a slight decrease in pore pressure during <br />the Yd Qtr with VWP-08 showing a a slight increase. The Division will continue to review the <br />quarterly data, as soon as it is available, and determine then whether BRL should return to monthly <br />monitoring of VWP-06 and -08 in the future. <br />If you have any questions feel free to contact me. (303) 866-3567 ext 8134 <br />Sincerely, <br />Jason Musick <br />Environmental Protection Specialist <br />O� colQ \ <br />9 <br />555 Street Address, Room 555, Denver, CO 55555-5555 P 555.555.5555 I `� - a' <br />��1876 jF <br />