SAMPLING COLLECTION AND HANDLING
PHASE II & V SOC'S
IMPORTANT: After collection, return samples as soon as possible. Some tests have a seven (7) day holding time. Please send in your samples the first of the week, so that we receive them no later than Thursday. If we do not receive them until Friday, holding times may elapse over the weekend and the lab may have to assess additional fees for Rush processing of samples.
1. Select a point at the well or at the water treatment facility. Sampling from the distribution system is not acceptable for SOC monitoring credit. Allow water to run approximately 5-10 minutes to flush the lines. Sample according to the following instructions for each bottle type.
2. If sampling from an open body of water, fill a glass 1-quart wide-mouth bottle or a 1-liter beaker with sample from a representative area. Carefully fill all sample bottles from this container. DO NOT use plastic as this could cause some false positive test results.
3. Upon collection, samples need to be chilled to 4C and maintained at that temperature until analysis. Ship samples in a cooler with ice or frozen ice packs. DO NOT freeze the samples.
CAUTION: Some sample bottle contain chemical and/or acid preservatives. Avoid contact with skin or clothing. Do not rinse out the bottles when collecting samples. Carefully follow the sample instructions below for each bottle type.
GLASS OR PLASTIC BOTTLES:
1. Fill bottles leaving 1 inch of air space at the top of each bottle
1. When sampling from a water tap, after flushing lines, adjust the flow from the tap to approximately 500mL per minute (½ quart per minute.). Fill two containers per each sample site. The Vials need to be submitted in duplicate.
2. Fill vials to overflowing so that no air bubbles are trapped in the sample when bottle is sealed. Seal the sample vials, PFTE seal face down, and shake vigorously for one minute. (PFTE side is the shiny smooth side of the seal, seals are in the correct position when shipped from the lab.)
*To check for air bubbles: Invert the sample and lightly tap the cap on a solid surface. The absence of entrapped air indicates a successful seal. If bubbles are present, open the bottle, add a few additional drops of sample and reseal the bottle as before.