question: before i backfill the trench in, can i put gray pvc conduit into the same trench??? is it safe to do so??
We normally have to have a 12" separation from any gas line buried with our electrical conduit. You would have to check with your electrical utility company, or The AHJ=Authority Having Jurisdiction--which may be your electrical inspector.
Do not bury your counduit, until you get an "ok".