By Robin Urevich Contributing Writer BOYLE HEIGHTS — The giant warehouse that burned for eight days in mid-June had used thousands of pounds of anhydrous ammonia to cool the facility. Anhydrous ammonia is a common refrigerant used in cold storage warehouses. But it is also toxic, and if it leaks, it can cause respiratory irritation; in large doses, it can lead to lung and eye damage and even death. In 2020, a contractor at a Lineage Inc. facilit…