WORK PLANS FILE 1 - Laserfiche WebLink

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i The well will be developed by bailing at least 48 hours after the well seal is placed. The bailing will remove most of the sediment within the casing and remove bridging fines within the slots and sand pack. This will be done by surging using the well water if possible, if not then only potable water may be used . A log of the amount of introduced water will be kept and its use will be kept to a minimum . Bailing and surging will continue until the water does not contain any silt or clay. The amount of water added to the well to develop it must be removed from the well during development. All purged water will be stored in drums, the drums will be sealed and left on site until the condition of the water is assessed . Sampling Protocol : Soil samples will be obtained from the core samples taken every 5 feet during drilling. A split spoon sampler with brass sleeves will be used . The samples will remain within the brass sleeve covered with aluminum foil , and capped with the plastic caps which are supplied with the sleeves . The plastic cap will be taped to the brass sleeve using duct tape so that an air tight seal is obtained . Samples will be marked and placed in a cooler of ice until they are turned over to the laboratory, which should be within 48 hours of the drilling. A Chain of Custody will be filled out by the sampler and signed by the laboratory . I The split spoon sampler and the brass sleeves will be decontaminated before each sampling event. They will be washed with Tri-sodium phosphate detergent and water and rinsed thoroughly with clean water. Core samples can be measured with a OVA meter and the readings will be recorded on the drill log . These readings will be used to help select the cores to be sent for laboratory analyses. A minimum of one core samples will be sent for analysis . One of these samples will be from the capillary fringe. If possible, one sample will be sent which is thought to be free of contaminant and one that is thought to be contaminated . One sample will be sent for at least every 15 feet of drilled hole above the water table. If the water table is at 10 feet or less then only 2 samples will be taken and analyzed. GROUNDWATER SAMPLING The equipment used to withdraw water from the well will be a PVC bailers . At the samplers option, he may purge the well with an electric pump. All equipment including the bailers, bailing cord, water depth measuring devise and the pump and electric lines and hose must be decontaminated prior to entering any well . They will be decontaminated by washing with Tri-sodium phosphate detergent and water and thoroughly rinsing them with clean water. The well will be purged and a water sample will be taken immediately after purging . The depth to groundwater will be measured from the highest point on the top of the casing to the surface of the water table. The devise used will be an electric conductivity devise which trips a red light and a buzzer when the probe touches water. A minimum of three measurements will be made at each well , the final reading will be noted after 2 or more readings do not vary by more than 0. 01 feet. The total depth of the well will also be measured . This information along with water parameters mentioned later will be entered onto the sampling sheet. The well volume will be calculated according to the formula supplied .