California. Envoy Petroleum Company in Long Beach, California. Plant processes asphalt. This is specifically the start of manufacturing of reinforced asphalt lining for canals, ditches and reservoirs. CU of workers, machinery, rollers, drills in motion. Descriptions of processes. Materials sandwiched between layers of tar paper create panels lining ranging from 1/4 inch to 1 inch. Many CUs and medium shots. Lining goes through various heating and cooling processes that make the material a suitable sealant. Strips range from 5 to 15 feet. Farmers and ranchers use. Sand applied for easier handling. Used for transporting and storing water to prevent leakage. Installations at places like the Laguna Municipal Reservoir. MS of installation process. Panels line floor with waterproof asphalt. Adhesive forms permanent bond. Panels can overlap or be placed side by side to make a good bond. Entire overview of process, worker applying strips, and pans of land where asphalt has been applied.