SoCal Gas has contracted English Air Service to complete survey work on area gas lines beginning on Monday, April 22nd. The survey work is expected to end no later than Saturday, April 27th and will be primarily in the Oxnard and Point Mugu airspace. Increased helicopter activity can be expected from 8 a.m. – 5 p.m. at an altitude of approximately 500 feet and flying in a grid pattern.