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				Calcium Chloride Tests: This test is also called the dome test. A dome test is used to measure the amount of moisture emitted from the surface of a concrete slab. It is performed by first grinding a 20in by 20in area, cleaning the concrete of any impurities and contaminants. Then a calcium chloride dish is weighed and placed in the center of the grinding area. A plastic dome is placed on top of the dish to simulate an airtight atmsphere. After a period of 60-72 hours, the dish is then cut out from the dome and weighed again. The weight gain will formulate into actual pounds of moisture per 1,000 square feet. For new construction, ASTM requires 3 tests for the first 1,000 square feet and 1 test for each additional 1,000 square feet.