Asphalt plant inspector for Iowa Highway Commission as it was called back in the day. Sat on catwalk on the pugmill, watching gauges and writing load tickets, in a bare rock quarry with no shade above a fuel oil fired blast furnace. Got your blazing summer sun, got your heat off the blast furnace, got your dust, got your asphalt fumes, got your fuel oil exhaust, got your diesel truck exhaust and the whole platform shook from the rock screening.
The other guys with the Highway Commission sat in an ice conditioned trailer most of the day weighing rock samples, packing testing to be sent to Ames when not out doing core drilled samples of the new asphalt pavement. Just added some insult to the whole setting. Plant broken down one day and almost heat stroked teen Boxster went into the cool trailer, a treat. Guy in charge handed me a broom and told me to sweep the trailer floor. I threw the bloom on the floor and told him to "******* sweep it yourself!" Thought I might get fired but nothing happened. I didn't much speak to him the rest of the summer outside of short sentences. Pretty much all of the workers, government and construction guys, hated college kids.