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• <br /> Mr. Steve Ach <br /> January 12, 1994 <br /> Page Three <br /> • It is not shown on the plans where the roof drains outlet runoff. However, this raises <br /> a question of whether or not a single catch basin in each low area provides sufficient <br /> inlet capacity to collect all the runoff from the site. It is suggested that the developers <br /> carefully review the drainage calculations to ensure that adequate capacity to take <br /> storm water runoff into the pipe system is provided. <br /> • The watermain coming into the site is very close to the building and it contains two 90- <br /> degree bends as it proceeds to the southeast corner where a hydrant is located. At a <br /> minimum, the watermain should be moved further away from the building so that, in <br /> the case that ii needs to be excavated in the future, neither the concrete curb and gutter <br /> nor the side of the building will be in danger. An alternative solution may be to pick <br /> a route from the existing hydrant directly to the north, straight through the parking <br /> area, and then provide a little longer service stub into the mechanical room. <br /> • The watermain on the project is shown to have seven feet minimum cover. This <br /> should be increased to a minimum of seven and a half feet. <br /> • • The sanitary sewer service from the building shows an invert approximately four feet <br /> above the invert of the existing manhole to which it is connecting. It also indicates that <br /> a vertical drop should be provided to a point two feet above the invert. We would <br /> recommend that if a drop is to be provided, it should be provided on the outside of the <br /> manhole, given the large number of units conveyed through this one service. Perhaps <br /> a better solution would be to just add additional grade to the sanitary sewer service <br /> line, such that it does enter the manhole at the existing invert. <br /> • All construction traffic to and from the site should be restricted to the Railroad right- <br /> of-way at the south and not allowed to access the property from School Street. <br /> If you have any questions regarding any of these comments, please call. <br /> Sincerely, <br /> MSA, CONSULTING ENGINEERS <br /> /�G2'cG2G�J <br /> Terry J. aurer, P.E. <br /> • TJM:tp <br /> 206-1202.jan <br />