Okay, let’s tackle this. So Al Stenzel has 38 years of experience as a Sr. Environmental Engineer, which is a long time. The industry average for Sr. Environmental Engineers in the US is around $90,000 per year, according to the Bureau of Labor Statistics. However, this is a general estimate and can vary widely based on factors like location, industry, and specific company. Since Al is in Denton, Texas, which is a relatively affordable area, I'll assume his salary is on the lower side of the national average. Considering his experience and education, I'll estimate his hourly rate to be around $75, which is roughly $3.81 per hour.