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[ CLEARWATER <br /> (' R 0 L P [ \ C <br /> © Hydrocarbon concentration in the air lust above the water level in the <br /> observation wells will be measured with a flame ionization detector or a photo- <br /> ionization detector <br /> The test will be run in steps, each step at a different injected air pressure During <br /> E each step, the following parameters will be measured to monitor the surrounding <br /> formation and determine when flow through the formation has stabilized <br /> 0 The induced pressure on the surrounding wells will be measured by <br /> MagnehelicO gauges in itches of water <br /> ia The injected air flowrate will be measured with a Kurz® Model 443 thermal <br /> anemometer, or equivalent. <br /> Once the formation has stabilized, pressures will be increased and the next test step <br /> will begin After the final step test, the depth to water, dissolved oxygen content in <br /> the well water, and the oxygen and volatile content of the air above the water in <br /> each observation well will be measured using the same instruments as above. <br /> 6.0 PRO31LEM ASSESSMENT REPORT <br /> 6.1 Results of Envestigation <br /> A Problem Assessment Report (PAR) will be prepared following the completion of <br /> the remedial pilot testing discussed in the preceding sections The PAR will contain <br /> a cumulative presentation of the results of the various phases of site <br /> characterization, as well as a detailed analysis of the information collected during <br /> the sparging, vapor extraction and aquifer pilot tests. The report will contain all <br /> requisite figures, cross-sections and cumulative analytical tables. <br /> 6.2 Evaluation of Remedial Alternatives <br /> Several alternative methods for remediating site soil and groundwater will be <br /> evaluated for cost effectiveness and applicability at this site based on the hthology, <br /> water table/aquifer characteristics and pollutant properties For remediation of the <br /> groundwater the alternatives will likely include: <br /> 0 Enhanced bioremediation (in-situ) <br /> E O In-situ volatilization (air spargmg) <br /> 0 Passive monitoring (natural attenuation) <br /> Groundwater extraction and treatment <br /> 0 Dewatering <br /> D-107/PILOT TEST WP 6 <br />