AWWA B703:2019 pdf download.Fluorosilicic Acid"
6. Tamper-evident packaging: Packaging having one or more indicators or barriers to entry which, ifbreached or missing, can reasonably be expected to provide visible evidence to the purchaser that tampering has occurred. The tamper- evident features of the packaging shall be designed to and shall remain intact when handled in a reasonable manner during manufacture, storage, shipment, and delivery to the purchaser. Properly constructed, labeled, and closed drums or nonbulk containers constitute efective forms of tamper-evident packaging.
5.1.2 Amount of shipment to be sampled. If the acid is supplied in drums, the number of drums sampled will be left to the discretion of the purchaser. In the case of bulk shipments, a composite sample should be taken from the tank truck or tank car.
5.1.3 Sampling container. Samples shall be collected in a clean, plastic or rubber container. Containers lined with acid resistant plastic, wax, or rubber may also be used.
5.1.4 Sampling method for drums. When sampling from drums, the fAuorosilicic acid in the containers to be sampled shall first be mixed by rolling or other suitable means. A portion shall be taken from each container to be sampled so that the total gross sample consists of at least 2 L.
5.1.5 Sampling method for bulk material. When sampling from a tank truck or tank car, at least five different 500-mL portions shall be taken from different places in the container (top, middle, and bottom) and combined to form a composite sample that is representative of the entire container.
5.1.6 Sample bandling. Afer mixing of the gross sample, three 500-mL samples shall be sealed in airtight, moisture- proof, plastic or rubber containers. Each sample container shall be labeled to identify it, and the label shall be signed by the sampler.
5.2.1 Test samples. Test samples shall be obtained from the sealed material samples (Sec. 5.1 .6) delivered to the laboratory. Material samples shall be unsealed only when it is necessary to remove quantities of the material for testing. Removal of material shall be performed quickly, and the material samples shall then be resealed for future reference.AWWA B703 pdf download.