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Ms. Kasey Foley_ ?roject E11-01.03 <br /> April 18, 1991 <br /> Page 3 <br /> shoring would be required not only for the safety of workers entering the <br /> excavation, but also to support the integrity of adjacent structures. Instal- <br /> lation and subsequent removal of shoring would also be a significantly <br /> complicated procedure without the use of conventional construction <br /> equipment. <br /> It is our opinion that, given the unique set of site-specific circumstances <br /> present at the Newark Sierra site, in-place closure of the underground <br /> courtyard sump and associated piping is the most reasonable approach. It <br /> does not appear that this approach will present an unreasonable threat to <br /> human health or the environment. <br /> We would like to schedule a meeting with you at Newark Sierra's facility to <br /> discuss the above-described excavation difficulties and the site-specific is- <br /> sues. I will contact you by telephone to arrange a convenient time to meet. <br /> Newark Sierra and EMCON appreciate your consideration in this matter. <br /> Very truly yours, <br /> EMCON Associates <br /> Mark A. Thomas <br /> Project Manager <br /> MAT:dbm <br /> cc: Dave Baker, Newark Sierra Paperboard Company <br /> adm\ad154 <br />