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_ _ <br /> E <br /> �.0 <br /> (i,e, , distance from the well). Nearby wells will <br /> be monitored on a periodic basis in the event of a <br /> �i <br /> transient capture zone being discerned from these <br /> efforts. <br /> : Task 2: Initiate Quarterly Ground Water Monitoring and <br /> sampling Program <br /> All ground water monitoring wells will be monitored <br /> and sampled on a quarterly basis; samples from the <br /> periodic pumping program ray be collected on a more <br /> if warranted. Grounddwater samples <br /> frequent basis, BTE <br /> will be analyzed for TPH-G, TPH-D, <br /> constituents. Results of the monitoring and sample <br /> analyses will be used to determine the necessity of <br /> implementation of the preferred ground water <br /> remediation system. <br /> 4 ' regardingadditional remedial work on <br /> Further recommebased othe following. <br /> this site are premature, <br /> contain benzene, <br /> 1. Ground water in AW-3 did not recently <br /> environmental concern, and no <br /> the constituent of major <br /> trends have been established in past reported TPH-G and <br /> f ' TPH-D results. <br /> 2. The shallow ground water appears to be contained within <br /> a 5-foot thick perched layer of apparent low <br /> z permeability. The saturated zone has limited storage <br /> capacity and any additiona <br /> ture zone$ willlikely <br /> potentialvfor <br /> ow <br /> yield and a limited cap <br /> ! ' overpumpin this shallow saturated zoneIsconsidered <br /> e high. Hydrogeologic parameters are not yet fully <br /> understood on this site; an aquifer test would provide <br /> needed data, but is not warranted at this time pending <br /> E , the results of Tasks l and 2 above. <br /> This report was prepared by: <br /> ALTON GEOSCIENCE <br /> Tridib K. Guha <br /> Date <br /> Project Manager <br /> Peter C. La r G. 5089 Date _ - <br /> Associate, Conco Operations <br /> 5 <br />