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increased if drawdown is less than 0.1 foot, but the pumping rate will not exceed <br /> 500 mUmin. In some silty and/or clayey formations, drawdown may exceed 0.1 <br /> foot when pumping at 100 mUmin. Field parameter measurements will be <br /> recorded following parameter stabilization (purging) and before sampling. The <br /> pumping rate and sampler intake location in the well will not be adjusted after <br /> purging. The field parameters and depth to water will be recorded on field data <br /> sheets a minimum of every 5 minutes while purging. Purging will continue until <br /> pH, temperature, specific conductance, ORP, DO concentration, and turbidity <br /> stabilize, which is defined as follows: <br /> o ±0.1 units for pH <br /> o ±3% for specific conductance <br /> o ±10 mV for ORP <br /> o ±10% for temperature <br /> o ±10% for turbidity <br /> o And±10% dissolved oxygen <br /> 1.4.3 Sampling <br /> Samples will be collected after field parameters have stabilized and been recorded. <br /> Samples will be obtained from the influent line (prior) to the flow-through cell. <br /> 1.4.3.1 Sample Documentation <br /> Field LQgs <br /> The field logs will document where,when,how,and from whom project information was <br /> obtained. Log entries will be complete and accurate enough to permit reconstruction of <br /> field activities. All entries will be legible and signed by the individual making the entries. <br /> Language will be factual, objective, and free of personal opinions or other terminology, <br /> which might prove inappropriate.If an error is made,corrections will be made by crossing <br /> a line through the error and entering the correct information. Corrections will be dated <br /> and initialed. No entries will be obliterated or rendered unreadable. <br /> Field sampling staff will identify and log observations that may be considered unusual on <br /> the field data sheet for each well. These observations include but are not limited to: <br /> excessive bubbling within the tubing or in the sample containers as they are filled; odors <br /> such as sulfide; excessive turbidity, solids, or formation of precipitates in the samples; <br /> color changes in the water;unusual sounds made by the equipment. In addition, sampling <br />