Laserfiche WebLink
,.. <br />' ~ ~ ;.--, ,~,. r - .---~ <br />~r .~ .... -"~. u L <br />-5- ~ <br />33. Clarify ditch sizing. According to "Design Charts for Open-Channel <br />Flow", cited as a ditch sizing reference, the lower chart (Retardance-C) .. <br />should be used to compute channel volume (pg. 39). For. example: llitch <br />C1-Q=15cfs, slope = 3% should have a depth of 0.82 feet instead of the 0.75ft <br />as computed on the upper curve (Retardance-D ). <br />In addition to this material, brief conversation with Ptike P1cCarthy on <br />12(27(79 indicated that they had some problems with tl~e legal stipulations of <br />our request [o the state For additional air quality info. lie stated that [he <br />request concerned ambient air quality which was beyond uur jurlsdic[lon and <br />therefore LPC was not required to submit same. Air quality data are necessary <br />to asses compliance with OSI•t's regulations and with the Clear Air Act (sec <br />30CFR211 at a minimum). The issues listed here consCituet only a partial <br />review of the technical issues associated with this application. Additional <br />information may be required before the technical analysis and environmental <br />analysis can be completed. <br />If you have any questions concerning this matter please feel free to contact <br />me or Keith Kirk of my staff. <br />Sincerely, <br />DONALD A. CRANE <br />S~ <br />~~ <br />~~ <br />~~~~ <br />