10-10-1988 - Agenda Packet City Council - regular meeting

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Charts illustrating the soil classification procedure, the descriptive terminology and symbols used on the boring logs were also made. 6.3 Water Level Measurements All ground water level measurements are obtained by using an electronic measuring de,/ice which indicates when a probe is in contact with the ground water in the well. Measurements are obtained by lowering the device into the well until it indicates that the water surface has been encountered and by measuring the distance from the top of the inside pipe to the probe. All of the measurements are recorded to the nearest 0.01 foot; however, the manufacturer's reported accuracy for the instrument is 0.04 foot. 6.4 Water Sampline All monitoring wells were sampled from suspected cleanest to most contaminated according to the following protocols. Field Protocol Step 1: Measure water level. Step 2: A stainless steel bailer was used to develop each monitoring well. A minimum of three to five well bore water volumes were evacuated from each monitoring well prior to sampling. Step 3: Collect water samples. Water samples were collected using a stainless steel. A field blank was collected during the sampling program. Step 4: Store water samples and transport to PAGE Laboratories, following all documentation and chain of custody procedures. Step 5: Clean equipment. Water level measurement equipment was :leaned with clean tap water followed by deionized water rinse. Upon completion of a soil or ground water sam Ring a chain of custody was init,ated. Chain of custody records include the following information: project, project number, shipped by. shipped to, suspected hazard, sampling point, location, field identification number, date and time taken, sample type, number of containers, analysis required, and sampler signature. As few people as possible handle the samoles. The chain of custody records were shipped with the samples to the laboratory. Upon arrival at the laboratory, the samples were checked and signed in to the appropriate laboratory personnel. Laboratory identification numbers were noted on the chain of custody record. A copy of the chain of custody was turned over to the project manager.