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$85 total including shipping by media mail within lower 48 US states. hard cover, international edition, 2003. This book is one of the best reference for civil-water resources and environ PE exam. email me if interested: jimhan27 at gmail dot com

used book, $130, free shipping to lower 48 US states. email: zhao27 at gmail.com

What's the Arizona State Board's requirement on PDH for PE? I searched their website and still no clue.

1. Is BOD5 value always assumed to be at 20 degree, even if the water temperature given is at different tempature, say 25 degree? 2. If inflow from primary settlement tank to aeration tank is Q, and recirculation rate R, the 2nd clarifier surface loading rate is Q/A or (1+R)Q/A? A is surface...

assume no water table present. When calculating bearing capacity, should I use wet unit weight or dry unit weight of soil? thanks.

How to calculate a critical length of grade for a vertical curve?