2009-02-26_REPORT - C1994082 (12)

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Table 6 Comparison of 2008 Ground Wa ter Quality to Agricultural Use Standards - Yoast Mine Analyte Standard No. Sites Sites Frequency 8xceedence Date Range Sxceedence V l Hxceedence ------- ------ ----- --------- ---------- - a ue Range ---------- Median ---------- Aluminum, Dissolved 0.0000 - 5.0000 0 none Arsenic, Dissolved 0.0000 - 100.0000 0 none Boron, Dissolved 0.0000 - 750.0000 0 none Cadmium, Dissolved 0.0000 - 10.0000 3 YAAL14* 2/3 05/28/08-09/16/08 30.0000 - 30.0000 30.0000 YGAL15* 3/3 10/09/07-09/16/08 30.0000 - 30.0000 30.0000 YW30* 1/1 08/18/08-08/18/08 30.0000 - 30.0000 30.0000 Chromium, Dissolved 0.0000 - 100.0000 0 none Copper, Dissolved 0.0000 - 200.0000 0 none Field Ph 6.5000 - 8.5000 0 none Fluoride 0.0000 - 2.0000 2 YWC33 1/1 08/18/08-08/18/08 2.7000 - 2.7000 2.7000 YWCU33 1/1 08/18/08-08/18/08 4.1000 - 4.1000 4.1000 Iron, Dissolved 0.0000 - 5.0000 1 YGAL15 3/3 10/09/07-09/16/08 12.7000 - 20.0000 18.9000 Lead, Dissolved 0.0000 - 100.0000 3 YAAL14* 2/3 05/28/08-09/16/08 200.0000 - 200.0000 200.0000 YGAL15* 3/3 10/09/07-09/16/08 200.0000 - 200.0000 200.0000 YW30* 1/1 08/18/08-08/18/08 200.0000 - 200.0000 200.0000 Manganese, Dissolved 0.0000 - 0.2000 4 YAAL14 2/3 10/09/07-09/16/08 1.3700 - 1.9800 1.6750 YGAL15 3/3 10/09/07-09/16/08 0.8000 - 1.3100 1.1000 YSAL12 1/3 10/10/07-10/10/07 0.4110 - 0.4110 0.4110 YSAL3 2/3 05/29/08-09/18/08 0.2620 - 0.2680 0.2650 Mercury, Dissolved 0.0000 - 10.0000 0 none Nickel, Dissolved 0.0000 - 200.0000 0 none Nitrate/Nitrite Nitrogen N 0.0000 - 100.0000 0 _ none Nitrite Nitrogen_N 0.0000 - 10.0000 0 none Selenium, Dissolved 0.0000 - 20.0000 0 none Zinc, Dissolved 0.0000 - 2.0000 0 none * = Sample below detection limit and detection limit greater than standard. 11- 0 40 0