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Based on the info, I would generally agree with civilperson with the exception of specifying a pipe size. The pipe sizing must be done based upon the flowrate of the pumps and maintaining a minimum velocity (in US generally 2 ft/sec) and also attempting to minimize retention times (i.e, not...

Am I the only one that has a major problem with STEG / STEP? You are purposely created anaerobic wastewater with the associated odor/corrosion and treatment issues????

For the alkalinity, you must figure out the existing alkalinity from the influent raw wastewater and deduct the alkalinity loss associated with nitrification ( 7.2 lb Alk per lb Ammonia)and the required effluent concentration (approx. 70 mg/l). I would also take credit for some (maybe...

Breaking out material costs and labor costs is a good way to show your supervisor that the cost of construction has gone up since his job in 1989. Using the ENR indexs and past bids is also a good way. To identify up front whether a savy contractor picked up on a take-off mistake, conduct a...

Vt, I am in the same deal as you (Oct PE myself) and was at 12% and still felt confused - thought it was more.

A developer is attempting to provide a brand new STEP system (ie. septic tanks are not there now)located in PA to be taken over by the local sewer authority. The development contains a significant amount of pipe with no houses initially, which is why they are proposing STEP (as they claim that...