Meaning of にまで?


A long time ago, I came across this example sentence in Jisho:

> 彼{かれ}の仕事{しごと}は井戸掘{いどほ}りからゴミの処理{しょり}に **まで** 及ぶ{およぶ}。  
>  His tasks range from digging wells to getting rid of garbage.

Why does this sentence use _both_ に and まで after 処理? Would it be sufficient to
have just one or the other, or are both required?




井戸掘りからゴミの処理に及ぶ would sound natural, and already emphasizes how broad his
responsibilities are.

Slightly literal translation:

> 井戸掘りからゴミの処理に及ぶ  
>  his responsibilities reaches from digging wells to getting rid of garbage

Adding まで strengthens this emphasis

> 井戸掘りからゴミの処理にまで及ぶ  
>  his responsibilities reaches from digging wells, to **even** getting rid of
> garbage

The same まで can be used like this: カリカリに揚げれば、骨まで食べられますよ

`彼の仕事は、井戸掘りからゴミの処理まで及ぶ` sounds a bit odd to me but I'm not sure if it's only
me.




井戸掘りからゴミの処理に及ぶ would sound natural, and already emphasizes how broad his
responsibilities are.

Slightly literal translation:

> 井戸掘りからゴミの処理に及ぶ  
>  his responsibilities reaches from digging wells to getting rid of garbage

Adding まで strengthens this emphasis

> 井戸掘りからゴミの処理にまで及ぶ  
>  his responsibilities reaches from digging wells, to **even** getting rid of
> garbage

The same まで can be used like this: カリカリに揚げれば、骨まで食べられますよ

`彼の仕事は、井戸掘りからゴミの処理まで及ぶ` sounds a bit odd to me but I'm not sure if it's only
me.

