Specifications include, but are not limited to: The liquid chlorine supplied shall comply in all respects with American Water Works Association Standard ANSI/AWWA B301, Latest Edition. Requirements of this standard include, but are not limited to, the following: o Purity shall be equal to or greater than 99.5% by volume o Moisture shall not exceed 150 parts per million (0.015%) by weight o Heavy metals total shall not exceed 30 ppm (0.003%) by weight expressed as lead o Lead shall not exceed 10 ppm (0.001%) by weight reported as lead o Mercury shall not exceed 1 ppm (0.0001%) by weight reported as mercury o Arsenic shall not exceed 3 ppm (0.0003%) by weight reported as metallic arsenic o Nonvolatile residue shall not exceed 150 ppm (0.015%) by weight o Carbon tetrachloride shall not exceed 100 ppm (0.010%) by weight (see standard) o Trihalomethanes shall not exceed 300 ppm (0.030%) by weight