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Rule 2: Permits <br />• bonding responsibility. The minimum period of responsibility for reestablishing vegetation will begin <br />after the last seeding or other activity related to final reclamation unless it can be demonstrated that such <br />work is a normal husbandry practice. Phase III bond release applications will not be submitted prior to the <br />_ end of the tenth growing season from last seeding. <br />To evaluate revegetation success. LCC will collect data from the revegetated area and ERA for <br />production, cover, species diversity, woody stem density, and utility. Methods for data collection will be <br />the same as for the 1996 baseline vegetation survey and the methods are detailed in Section 2.04.10. <br />Point-intercept Cover <br />Quantitative studies of community composition will employ the widely used point-intercept method. The <br />technique is efficient and appropriate for plant communities at Lorencito Canyon, suitable for both large <br />and small mosaics, and objective. At a minimum, fifreen transects will be sampled in each community <br />type present in each disturbance area and corresponding reference area or sufficient transects will be <br />sampled to reach sample adequacy. Vegetative community types occurring within the disturbance areas <br />will include oak/pinyon pine and grassland. Transects will be located in homogeneous vegetation units. <br />Ground cover will be evaluated using the Cover-Point Optical Point Projection Device along each 50- <br />meter transect by sampling two points approximately one-meter apart for a total of 100-points per <br />transect. Each sample point will be determined by projecting the ocular sight vertically downward to the <br />sample location on the transect and recording all "hits" as either litter, rock., bare ground, or vegetation by <br />species. <br />Following the data collection at the minimum number of transects, statistics will be run in the field to <br />determine whether sample adequacy is achieved. Sample adequacy will be determined usine the <br />Snedecor-Cochran sample adequacy formula. The formula is as follows: <br />N,,,,,, _ (t~s') divided by (ds)' <br />where: <br />N,,,;,, = the minimum number of observations needed, <br />t = the t-table value for atwo-tailed t-test with (n-I) degrees of freedom at the 90 <br />percent confidence level, <br />S2 =the sample variance, <br />2.05-72 <br />LJ <br />(Revised 7/29/03) <br />