Laserfiche WebLink
Test results for seeminqly similar types of materials varied <br /> widely. ABP for stockpiled waste ranged from -157 to -6 . 09. <br /> Tests performed on in-place waste in the Sunnyside Pit yielded <br /> ABP numbers ranging from +43 . 7 to -101 and av2raginq -21 . 3 . <br /> These results prove that the open-pit waste definitely has the <br /> potential to become acidic. However , the test result of -157 on <br /> the stockpiled waste appears to be excessively negative when <br /> compared to the average of those performed on the in-place waste <br /> in the Sunnyside Pit. <br /> ABP test results from naturally occurring material showed a <br /> surprisingly large variance. Overburden stockpiled from the <br /> Washington Pit tested at -4 . 91 while overburden stockpiled at the <br /> Sunnyside Pit tested at -59 . 9 and -6 . 09 . The majority of the <br /> Sunnyside overburden came from the hillside directly east of the <br /> Pit. This hillside contained dumps from both an old shaft and an <br /> old drift. This is probably the reason for the high ABP number . <br /> It is our feelinq that this sample is not representative of the <br /> overall stockpile . Further testing will be conducted next summer <br /> to determine if this is true. It should be noted that tests <br /> conducted on in-place overburden southwest of Lake Emma (#1 E. <br /> Exposure and #2 Drillpad) yielded ABP numbers of -4 . 36 and +1 . 10, <br /> both very much in line with the ABP of the Washington overburden. <br /> Positive ABP results were obtained from the talus slope directly <br /> west of Lake Emma and the country rock (volcanic host rock) . <br /> - 3 - <br />