1500 1ST ST RAIL BARGE FACILITY 2016-01-01 MF Import

Vurti�chs SLorrrn�»ler TreatmenC S�tem ^ __ Laboratorv Oualitv Control Brief The following protocol summarizes standard operating procedures for To[al Suspended Solids (TSS) testing in the Vorteclinics Labora[ory. These guidelines were foliowed in the creation oF the preceding performance curves. Sediment Source Sediment samples are sorted according to ASTM Special Technical Publication 477 B, which establishes sleve analysis procedures. U.S. Standard Sieves in a Gilson SS-15 sieve shaker are used to separate particies to the various fractions requfred for our tests. To ensure uniformity of those fractions, an unsorted sample is sieved until less than 1% of that sample passes through the sieve in one minu[e. All sediment recovered after a rest is dried and resieved be(ore reuse. Unless otherwise specified, minerel sediments with a density of 2.65 g/cm' are used. Tlie following [able describes the particle size distribution oF samples tested by Vortechnics to represent T55 Loading in rypical urban runoff. Tabte 1 Particie Size Percentage of Distribution Sample Make-up < G3 µm 42% 63 - 75 µm 4% 75 - 100 µm 9% 100 - 150 µm 7% ' 1$0 - 250 µm 11% > 250 µrtl 27% Flow Calibratlon and Reaulation Flow calibration is accomplished by calcuiating the head at the baffle wall required to produce a given flow rate through the orifice and the weir in the flow control wall. Flow is regulated by a 12- inch (305 mm) butterfly valve located upstream of the Vortechsm System. In order to simulate field conditions, flow retes are changed gradually :o avoid flow suryes through the System. The test flow rate is set by observing the head in tl-e Vortechsm System and adjusting the regulating va've accordir.gly. Before any samples are collected, the valve must remain fixed for a period eq�al to half of the detention time so tliat flow equalizes throughout the '+ystem. Each test group is planned so that flow rates increase incrementally in consecutive te ts. Sediment Meterino All sediment is injected into the inlet pipe vla a '/<-inch (6.35 mm) flexible hose using a Watson Marlow SO58 peristaltic metering pump. For TSS tests, a known gradation of sediment and water are combined in approximately a 1/2 pound/gallon (0.06 kg/L) ratio in a holding tank and homogenized by a mixin9 propeller �owered by a 1/3 horsepower (246 W) motor. The mfxer is activated at least 5 minutes before testing commences �nd runs continuously throughout the [est. The metering pump is ac' cated For a period of time equal to at least half of the detention time of the Vortechs'3 System at the test (low rate, before the first influent sample Is taken. The pump must run continuously un[il tlie last eflluent sample is taken. Rev a-z9-Oa (lvsG)