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11 <br />n <br />0 <br />0 <br />r <br />i <br />n <br />0 <br />r <br />C <br />EJ <br />C <br />L <br />n <br />field notebook. Plate C-2 shows an example of the water sample field <br />data sheet. Copies of the field data sheets will be reviewed by the <br />sampling coordinator after the sampling event is completed. The pH, <br />electrical conductivity, and temperature meter will be calibrated <br />prior to initiating field activities. The calibration will be checked <br />once each day to verify meter performance. <br />After the calculated purge volume has been removed and the pH, conduc- <br />tance, or temperature has stabilized, samples will be collected. With <br />as little interruption in pumping rates as possible, the pump effluent <br />will be directed into appropriate containers. The pump flow will be <br />regulated when collecting samples for volatile organic analysis. The <br />flow will be set to approximately 100 milliliters per minute to <br />minimize turbulence and aeration of the pump effluent. If insuffi- <br />cient water is present or the total depth is too great in the well for <br />the pump to function properly, ground -water samples will be collected <br />with a bottom filling bailer constructed of Teflon. <br />Sample bottles for volatile organics analysis will be filled complete- <br />ly to prevent any air from remaining in the bottle. A positive <br />miniscus forms when the bottle is completely full. A convex Teflon <br />lined septum will be placed over the positive miniscus to seal the <br />container. After capping, the bottle will be inverted and tapped to <br />check that no air bubbles are present. All samples for organic <br />analysis will be collected in duplicate. The sample containers for <br />other parameters will be filled, preserved as required, and capped. <br />Stream samples will be collected with a dipper in accordance with the <br />procedures described in Section 9 of Test Methods for Evaluating olid <br />Waste: Ph si /_hemiral Methods (EPA SW -846, 3rd edition, November <br />1986). These samples will be collected at midstream, mid -depth <br />locations in an upstream to downstream direction unless otherwise <br />directed. Surface -water samples will not be filtered. <br />PJ9 9390313.00D <br />