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4 ,y + IJ SII i j 7 Hor*zon's V� C�_ � i After the water levels within the wells stabilize, a sample will be collected with a clean disposable bailer. Samples will be contained in air-tight vials and then packed on ice and sent to the laboratory E for analysis. Groundwater samples will be transported to the laboratory and analyzed within the n EPA-specified holding time for requested analysis. Each sample container submitted for analysis will have a label affixed to identify the job number, sample date, time of sample collection, and a sample number unique to that sample. Samples will be analyzed by a California-certified plaboratory i 3 A Chain-of-Custody form will be used to record possession of the sample from time of collection to, 2 ` its arrival at the laboratory. When' the samples will be shipped, the person in custody of them i relinquishes the samples by signing'rthe Chain-of-Custody form and noting the time. The Sample Control Officer at the laboratory will verify sample integrity and confirm that the sample was collected in the proper container, preserved correctly, and that there is an adequate volume for analysis. 8.0 REUREAD TOP OF I�ASJNG MEASUREMENT1 The top of each new well riser will be measured to allow correlation of the groundwater levels at the R site. The measured point on each well riser will be marked to help insure future groundwater level measurements are taken from the same location. All measurements will be measured relative to an arbitrary datum or benchmark to the nearest 0.01-foot using a surveyor level and graduated stadia rod. . If using an arbitrary datum, one well riser will be assigned the arbitrary datum and the other well riser will be measured higher or lower relative to the arbitrary datum. j E Y I l I ill ViE f i i I 3 i 3 ' r HORIZON ENVIRONMENTAL INC.