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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' withdrawn and placed in a the appropriate sample bottle supplied 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 />' 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 ace <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 /> I 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 /> 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 Custcdy will be filled out by <br /> the sanpler. The one liter brown bottles for TPH-diesel must <br /> have a small 40 tO 60 ml cf headspace, if not the bottles will <br /> Ibreak during transport.The tests run will be as follows : <br /> Test Detection <br /> Limits <br /> I DHS TPH Method (Gasoline)/(Diesel ) 50 ug/L <br /> EPA 602 for <br /> Benzene 0 . 5 ug/L <br /> I Toluene 0 . 5 ug/L <br /> Ethyl Benzene 0 . 5 ug/L <br /> Xylenes 0 . 5 ug/L <br /> All laboratory resalts, 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 /> I <br /> i <br /> I <br /> I <br />