Emission Factor Documentation for AP-42 Section 11.19.1 .
AP 42, Chapters 11.19.1, Sand and Gravel Processing and 11.19.2, Crushed Stone Processing and Pulverized Mineral Processing. 1 . SQCS facilities are part of a larger industrial process where stone, sand, gravel, rock, and minerals are removed from the earthand prepared for .Lind Marine sand and gravel aggregates are used for asphalt, concrete, yard landscaping and dozens of other purposes. Lind Marine is the only locally owned and operated Bay Area company permitted to mine sand from deposits in the Suisun Bay. After the sand is mined, we barge it to our Petaluma and Collinsville aggregate plants, process it and .