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Mr. Vaughn • 8 12 May 1995 <br /> CONCLUSIONS: <br /> STTC should offer a more complete justification for the choice of the test areas. That justification <br /> should include: indication that the nature of the soils and depth to ground water are compatible <br /> with the technologies being tested; a justification for the proposed screen lengths and a discussion <br /> of why vertical wells instead of horizontal wells are being proposed; information showing either : <br /> (1) that the proposed test site is representative of general conditions at the STTC terminals, or, (2) <br /> that justifies making the proposed test area a target for early remedial action (e.g., high relative <br /> levels of ground water or soil contamination). The consultant should submit a more detailed <br /> discussion of procedures for the aquifer pumping test, including a discussion of conditions which <br /> would lead to extending the duration of the constant-rate test for greater than 24 hours, and <br /> specifications on the wells that will be used for observation wells. Also, the workplan should <br /> specify what will be done with the extracted water from the ground water pumping tests. <br /> GJW <br />