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EXHIBIT A <br /> DESCREMON OF FIELD METHODS <br /> Measurements of thit static water level were taken in each well prior to commencing <br /> development, and a check for floating product was also made at that time. <br /> Prior to sample collection, groundwater was purged from each monitoring well by Brown and <br /> Caldwell Consultants personnel using the Well Wizards. The purged groundwater was stored <br /> in <br /> covered 55-gallon drums on site. While purging groundwater from each well, the pH, specific <br /> er purged was monitored. Approximately three wt.0 volumes <br /> conductance, and volume of wat <br /> of groundwater were evacuated from all sampled mcnitoring wells. <br /> The wells were sampled using disposable polyvinyl chloride oaders equipped with bottom- <br /> emptying valves. The sample was drained directly from the bottom valve into four 40-milliliter <br /> glass butt?es with teflon-Lined septâ–ºems. The samples were stowd on ice from the time of <br /> collection through delivery to Enseco, a Califorr-i state-certified 'taboratory. <br /> All groundwater produced during the sampling activity was removed from the site by Armour <br /> Petroleum Services. <br />