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1.5 <br />+,x <br /> Gettler-Ryan, Incq�-nrated r= <br /> July 26, 1984 <br /> Page 2 <br /> Evidence of contamination by petroleum products varied significantly. <br /> Free product was present in the auger-return material encountered during <br /> installation of Well E-9. Product odor was also evident prior to <br /> encountering 3HosevidPnce of <br /> ter <br /> contamination was ndiscovered in Wells stallation of sE-7, <br /> through 1 <br /> E-8, E-10, E-11, or E-12. <br /> RECOMMENDATIONS <br /> Based upon the information available to date, we recommend a remedial <br /> a ground-water extraction/product recovery well and a <br /> system including <br /> product/wastewater separator tank with a well 1,000-gallon-minimum <br /> mon <br /> capacity. A tentative location for the recovery <br /> Figure 1, together with alternate locations for the separator tank. <br /> Final locations will be determined from evaluation of access, sewer <br /> location, product mound configuration, traffic, and rather site-specific <br /> criteria. <br /> Preliminary design details for the recovery well are illustrated on <br /> Figure.2, based upon evaluation of data obtained during installation of <br /> the monitoring wells nearest the proposed site. The configuration <br /> the well presented on Figure <br /> he pumps in the proposed r2 may need <br /> to be adjusted based upon operating experience with the system. <br /> ` if you have. any questions regarding the contents of this letter or the <br /> findings of our investigations, please do not hesitate to call. <br /> Very truly yours, <br /> EMcON Associates <br /> William W. Hansen <br /> Site coordinator <br /> ohn N. Batchelder <br /> Project Manager <br /> WW1i/Jt18:yl <br /> Enclosures 5 <br />