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highest subjective evidence of contamination in the soil boring,drilled adjacent to the former <br /> tank cavity will be analyzed for organic lead by the method recommended by the <br /> Department of ldcalth Services. <br /> GROUND WATER FLOW <br /> The ground water gradient and direction of now within the uppermost water bearing <br /> unit will be evaluated using depth to water measurement-sand surveyed well head elevations <br /> of the monitoring wells. Locations and elevations of the monitoring wells will be surveyed <br /> by a licensed land surveyor. Depth to water measurem4nts will be made with an electronic <br /> water-level indicator to the nearest 0.01 foot and obtained a minimum of 48 hours after well <br /> development and before any primping or bailing required on-site for purging or sampling. <br /> All wells will be vented to the atmosphere for a minimum of 1 hour before obtaining depth <br /> to water measurements. Venting is conducted to allow the ground water to equilibrate with <br /> barometric pressure. <br /> ADDITIONAL.ASSESSMENT DRILLING <br /> If sample analysis results indicate chat contamination has extended beyond the limits <br /> additional wells will be proposed and installed with the <br /> defined by the monitoring wells, <br /> encies. <br /> authorization of the appropriate regulatory ag <br /> 9 <br />