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1 <br />' Horizon's Field Methods and Procedures <br /> IS MOIVITQ INI G WELL DEVELOPMEN1 I PURGING AND SAMPLING {cont.} <br /> Each sample container submitted for analysis will have a label affixed to identify the fob number, <br /> sample date, time of sample collection, and a sample number unique to that sample A California- <br /> certified laboratory will analyze samples <br /> A Chain-of-Custody form will be used to record possession of the sample from time of collection to <br />' its arrival at the laboratory When the samples will be shipped, the person in custody of them <br /> relinquishes the samples by signing the Chain-of-Custody form and noting the time The Sample <br /> Control Officer at the laboratory will verify sample integrity and confirm that the sample was <br />' collected in the proper container, preserved correctly, and that there is an adequate volume for <br /> analysis <br />' 8.0 WELLHEAD TOP OF CASING„MEASUREMENT <br /> The top of each new well riser will be measured to allow correlation of the groundwater levels at the <br /> site The measured point on each well riser will be marked to help insure future groundwater level <br />' measurements are taken from the same location All measurements will be measured relative to an <br /> arbitrary datum or benchmark to the nearest 0 01-foot using a surveyor level and graduated stadia <br /> rod if using an arbitrary datum, one well riser will be assigned the arbitrary datum and the other <br /> well riser will be measured higher or lower relative to the arbitrary datum <br /> 1 <br /> 1 <br /> I I'i <br /> IHORIZON ENVIRONMENTAL INC. <br />