I have been working in chemical plants (project scheduler / "excel guy") for a few years but the uncertainty and constant relocating can be draining. 

Spas would also require a lot of attention for chemical adjustment and cleaning.  

(most notable are the largest banks)ADAC LaboratoriesAdvanced Telecommunication Corp.Aeroquip Vickers Inc.Alabama Power Co.Alfa Corp.Allegheny Technologies Inc.Allergan Inc.Allfirst Financial Inc.American Business Products, Inc.American Electric PowerAmerican Express Co.American Greetings Corp.American Management Systems Inc.American Seafoods Group LLCAmeritech Corp.Amerus Group Co.Anadarko Petroleum CorporationAppalachian Power Co.Arch ChemicalAristech Chemical Corp.AT&T CommunicationsAtlantic Richfield Co.Avery Dennison CorpAvon Products Inc.B.

Cooking with derailed train chemicals actually.Jokes aside, it's a great area.

In my calculations, it's more cost effective to just do treatments on a schedule.The new chemicals are not as good as the previous ones but also, they're not as difficult to procure if someone is inclined to diy, you can actually purchase Termidor and some generic versions of it and do your own.

These baits were simply a chemical dot that I couldn't see placed underneath the edges of the counters.

I am less focused , my vision is not as clear, and I am less motivated.I think there is a chemical reaction in our brain when we physically check off each task we wrote for that day.

Some chemicals react with the finish and turn it yellow/brown.

I work with a wastewater utility up in Maine that keeps a chemical storage garage heated to 50 degrees all winter long with no fuel cost.

Water would depend on how well they kept the chemicals balanced and needed to empty it and start fresh if they didn'tIf it were me, I'd check on #1 as the tenants may not have accounted for this and the cost for #2 and it may just change their minds anyway