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• at least the last two years of bonding responsibility. The minimum period of responsibility for <br />reestablishing vegetation will begin after the last seeding or other activity related to final <br />reclamation unless it can be demonstrated that such work is a normal husbandry practice. Phase <br />III bond release application will not be submitted prior to the end of the tenth growing season from <br />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 <br />will be the same as for the 1996 baseline vegetation survey and the methods are detailed in Section <br />2.04.10. <br />Point-intercept Cover <br />Quantitative studies of community composition will employ the widely used point-intercept <br />method. The technique is efficient and appropriate for plant communities at Lorencito Canyon, <br />suitable for both large and small mosaics, and objective. At a minimum, fifteen transects will be <br />sampled in each community type present in each disturbance area and corresponding reference area <br />or sufficient transects will be sampled to reach sample adequacy. Vegetative community types <br />occurring within the disturbance areas will include oak/pinyon pine and grassland. Transects will <br />be located in homogeneous vegetation units. <br />• Ground cover will be evaluated using the Cover-Point Optical Point Projection Device along each <br />50-meter transect by sampling two points approximately one-meter apart for a total of 100-points <br />per transect. Each sample point will be determined by projecting the ocular sight vertically <br />downward to the sample location on the transect and recording all "hits" as either litter, rock, bare <br />ground, or vegetation by species. <br />Following the data collection at the minimum number of transects, statistics will be run in the field <br />to determine whether sample adequacy is achieved. Sample adequacy will be determined using <br />the Snedecor-Cochran sample adequacy formula. The formula is as follows: <br />Nm,~ _ (t'-s') divided by (dx)' <br />where: <br />Nm;D = the minimum number of observations needed, <br />t = the t-table value for atwo-tailed t-test with (n-1) degrees of freedom at the 90 <br />percent confidence level, <br />s~ = the sample variance, <br />• <br />PERMIT.a99D¢cmbcr'], 1996 L'O~- /? <br />