ARCHIVED REPORTS XR0001873 - Laserfiche WebLink

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A-2 Upon recovery, the three soil sample tubes were removed from the sampler One portion of the soil sample was placed in a ziplock bag for screening with an photoionization detector (PID), and another portion of the soil sample was used for classification and description One of the soil sample tubes was sealed and stored at approximately VC for transport to the laboratory The soil samples retained in ziplock bags were allowed to warm to ambient temperature, inducing volatilization of petroleum hydrocarbon vapors, and the headspace vapors were analyzed with a PID equipped with a 10 2 eV lamp 1 calibrated to hexane The highest observed reading was recorded on the soil boring Iog A chain-of-custody form was used to record possession of the samples from time of collection to arrival ' at the laboratory When the samples were shipped, the person in custody of them relinquished the samples by signing the chain-of-custody form and noting the tune The sample control officer at the laboratory verified sample integrity and confirmed that it was collected in the proper container, preserved correctly, and that there was an adequate volume for analysis 4.0 MONITORING WELL DEVELOPMENT Upon completion of each monitoring well and recovery well, a surge block was used to remove fines from the sand pack After surging, at least 6 well casing volumes of ground water were bailed from each ' well to remove sediment ' 5.0 SURVEYING Reference points at the tops of the casings of all monitoring wells, recovery wells, and deep vapor ' extraction wells, were surveyed on March 16, 1994, to allow correlation of the ground water levels at the site The wells were surveyed relative to City of Lodi Bench Marie No 374 with an elevation of 51 96 feet above mean sea level All elevations were surveyed to within 0 01-foot of the bench mark elevation ' 6.0 GROUND WATER DEPTH DETERMINATION Depth to ground water was measured to the nearest 0 01 foot using an electronic hand held water level indicator The depth to ground water was measured from a surveyed referenced point at the top of the well casing The tip of the probe was examined to determine whether a product sheen was present 1 ILRF-164 53I-