when i went to the grocery store last night, I saw an elderly couple driving a smart car .... hehe kind of cool ...
p*a
2 楼
谢谢
o*l
3 楼
old ppl are cool remember that
【在 l*r 的大作中提到】 : when i went to the grocery store last night, : I saw an elderly couple driving a smart car .... hehe kind of cool ...
a*h
4 楼
There are many types of waste water. There is no universal waste water standard. What EPA has is a National Recommend Water Quality Criteria. You can GOOGLE it. Every state develop their own surface water quality criteria based on the EPA recommend level. The criteria for individual waste water discharge is even more complicated. Depends on the watershed they are in, the applicable standard might be based on anti-degradation or TMDL level.