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i <br />/~ <br />t <br />Neuv Horizon Ana: 2007 Vegetatr'on Samp/irrg for Phase 3 &md Release <br />3. If sample adequacy doss NOT exist at {rec) but does at {ref), use eons-sample "reverse <br />null" t-test. However, CpRMS requires aminimum of n = 30 at (rec}, and that mean (rec) <br />is greater than Q. The reverse-null t-test is one-sided with alpha = 0.20. The null <br />hypothesis being tested is that the mean (rec} is less than or squat to O. If the null <br />hypothesis is rejected vegetation is successful. <br />4. If sample adequaoy does NOT exist at (red, use a two-sampfe `reverse null' t-test with <br />Satterthwaite approximation of standard error and degrees of freedom. The test <br />requires a minimum of 30 samples in the {rec) and (ref), and that mean (rec) is greatsr <br />than Q. The reverse-null t-test is one-sided with alpha ~ 0.20. The nulE hypo#hesis being <br />tested is that the mean (rec} is less than ar aqua! to Q. If the null hypothesis is rejected <br />vegetation is successful. <br />2A PROCEDt1RES <br />2.'t Study Areas <br />Areas to be studied were determined by WFC. Study sites are shown on the attached map <br />fgures, and included the following areas: <br />7. Irrigated Pasture Reference Area {7.2 acres). This area adjacent to (east of) the New <br />Horizon Mine 3s owned by WFC and leased to an operator who irrigates the property and <br />grazes horses on the property in winter. The reference area was first established in 2007 <br />and the vegetation has not been studied before. <br />2. Irrigated Pasture Reclaimed, Phase 3 (128.6 acres). This area is in its first year of eligibility <br />for Phase 3 vegetation measurement. WFC is also applying for Phase 2 band release on <br />this area. <br />3. Dryland Pasture Reference Area (6.7 acres}. This area is vacant unmanaged land adjacent <br />to the Nucia Airport. The reference area was established several years ago and the <br />vegetation was measured in summer 2005 for comparisons with other New Horizon Mine <br />Permit 1 reclaimed lands. <br />4. Dryland Pasture Reclaimed, Rhass 3 (21.9 acres). This area is in its first year of eligibility <br />for Phase 3 vegetation measurement. WFC is also applying for Phase 2 txmd release on <br />this area. <br />2.2 Samptinst Procedures <br />A f~efd crew of 3 to 4 botanists conducted fieldwork from Duns Q to June 22, 2007. For each of <br />the study areas described above, in ESRI ArcMap (a GIS computer application} we created a <br />polygon shapefile defining the study area boundary, then used a Gt5 application to generate at <br />feast 50 random point locations in each study area. We uploaded the sample points into <br />Garmin GPS units (average accuracy 15 fast} and used the GPS units to navigate to sample <br />points in the field. A few sample points were rejected in the field because they felt in areas at <br />field margins not typicat of the reclaimed land or reference area land being measured, for <br />example a mowed road berm. <br />BlU-toylc Environmental 5 <br />November 12, 2007 <br />Attachment 1-5 <br />