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"�y..,. �qu» ,� Vie•. .- y " •. +� ,"�;.v .��.�"� �:7 � +g`v �"Mr` 5^'i"` '�,,�. w ;�. � � �:; <br />.te �"'�� 9 •, « .o-. r ;�, '� r5 �,j:w :x �. '� ;sem '- 'si.. a.`.w,_,.,.. E -., ,-4- .�,., .. �-� .- <br /> EXHIBIT ,t <br /> DESCRIPTION OF FIELD METHODS <br /> Measurements of the static water level were taken in each well prior to commencing purging,mid <br /> a check for floating product was also made at that tune. <br /> Prior to samp'.ing, the monitoring wells were purged using a diaphragm pump (supplied by <br /> Armour Petroleum Services). The wells were purged of a minimum of three well voIu nes, if <br /> possible, or until they went dry. A well volume is defined as the amount of groundwater in the <br /> well casing and in the filter pack, at an assumed porosity of 35 percent. Measurements of pH, <br /> specific conductance,and temperature of the groundwater were taken at regular intervals during <br /> pumping. After purging, each well was sampled with a disposable bailer equipped with a <br /> bottom-emptying valve. The sample was drained directly through the bottom valve into two 44- <br /> milliliter glass vials with Teflon-lined septa. <br /> All groundwater produced during the sampling activity was removed from the site by Armour <br /> Petroleum Services. <br />