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vary by more than loo for the conductivity or temperature or <br /> 0 .1 on the pH reading then step C is repeated until the readings <br /> are within the limits. <br /> D) The well will be allowed to recover to 800 of its original <br /> volume or 2 hours have passed (remeasured) then a sample will be <br /> withdrawn and placed in a the appropriate sample bottle supplied <br /> by Sherwood Laboratories of Hilmar California. Sherwood Labs <br /> supplies the sample vials with the proper amount of Hydrochloric <br /> I Acid in each bottle, so no further acid or any other chemical <br /> should be added to the water. The bottles will be placed on ice <br /> in a cooler and kept on ice until delivered to the lab or turned <br /> over to their courier within 48 hours of the sampling time. <br /> Purged water will be placed in a sealed drum and left at the <br /> site. The drums will be labeled for the source of the water. <br />' After the chemical analyses are completed the contamination in <br /> each drums will be assessed. If the chemical analyses of the <br /> water in a drum shows the water to be free of contamination then <br /> this water will be disposed of as clean water. Contaminated water <br /> will be removed from the site by a licensed waste hauler. <br /> Water samples will be taken from the water at or near the surface <br /> I of the water table, unless otherwise indicated. The containers <br /> will be filled so that zero headspace is present in the sealed <br /> vial before placing in the cooler. Trip blanks will accompany <br /> all sample containers. A Chain of Custody will be filled out by <br /> the sampler. The one liter brown bottles for TPH-diesel must <br /> have a small 40 t0 60 ml of headspace, if not the bottles will <br /> break during transport.The tests run will be as follows: <br /> Test Detection <br /> Limits <br /> DHS TPH Method (Gasoline)/(Diesel) 50 ug/L <br /> EPA 602 for <br /> Benzene 0. 5 ug/L <br /> Toluene 0 .5 ug/L <br /> Ethyl Benzene 0. 5 ug/L <br /> Xylenes 0 .5 ug/L <br /> All laboratory results, well measurements and the Chain of <br /> Custody must be sent to our office for evaluation and the <br /> preparation of a report. <br /> I <br />