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PA Chevron U.S.A. - Page 6 <br /> i <br /> c� <br /> 1. In-situ hydraulic testing of existing monitoring well MW-6 by means of <br /> slug-testing, The slug test will be utilized to help evaluate contaminant <br /> plume migration, and to estimate location(s) for down gradient monitoring <br /> well(s) . Slug testing is further described in Section 5.0 of this <br /> proposal. <br /> II. Installation of 4 additional ground water monitoring wells at the subject <br /> property to include; <br /> a) Install one down gradient well approximately 100 feet from existing <br /> eastern property boundary <br /> b} Install one well adjacent to the existing MW-6 well, which will be a <br /> deepened version of the MW-6 well, for hydraulic testing and <br /> possible future extraction. <br /> w c) Install two additional ground water monitoring wells to the north <br /> w and south of the tank cluster/product line area for evaluation of <br /> lateral mirri�tion of contaminants. <br /> III. Slug testing of the gradient-aligned monitori/n� wells described in work <br /> �C items a) and b} `70/ 6_et4e mon: <br /> Y��•c� ' <br /> : , _ ..,� ���,[,r,y�e.o( ..-- ►JOT h� Qalnl;7"�ey. � ula�L:+� L1.t.� r..c+Le-.2�• <br /> Iii. Design and coordinate implementation of a pump-and treat technology air <br /> stripping/activated carbon ground water treatment system for the subject <br /> property. <br /> k� <br /> V. Install a ground water monitoring well adjacent to the existing MW-2 <br /> location to be designed, tested, and implemented for ground water <br /> extraction and treatment. <br /> i <br /> The stepwise approach developed for the additional investigation has been <br /> based upon the interpretation of data from previous investigations and on-going <br /> ground water monitoring, which in Dames & Moore's opinion suggests a trend of <br /> 'T contamination migration is occurring through typically granular aquifer materials <br /> at a roughly estimated rate of 0.8 feet per day in a general east-northeasterly <br /> direction. The wells to be installed at the subject property during our proposed <br /> investigation are anticipated to be deeper than those existing monitoring wells <br /> k <br /> at the subject property. <br /> D, ML',s, N1cIoae <br />