What is the term for the person who marks off gas/sewer/water?

[Bruce P.]

Hi,

My friend is building an ADU in Los Angeles (Ventura County - the Westlake/Moorpark area specifically) and their contractor told them prior to starting they would have to get the ground inspected where the foundation is supposed to be. The "inspector" would mark off the gas/sewer/water/etc lines with stakes.

1) Is that person called a deputy engineering inspector or a deputy inspector (contractor wasn't sure)?  Basically they need to be able to google for companies that provide this.

2) My other friend told me one of the local utility companies might have a list of "inspectors" (or whatever they are called). My question is - any utility company? Or should I call the electric company specifically?