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GROUNDWATER TECHNOLOGY, INC <br /> STANDARD OPERATING PROCEDURE <br /> CONCERNING SOIL SAMPLE COLLECTION AND <br /> HANDLING WHEN SAMPLING FOR VOLATILE ORGANICS <br /> SOP 15 <br /> 1 Use a sampling means which maintains the physical integrity of the samples The project sampling <br /> protocol will designate a preferred sampling tool A split spoon sampler with liners, or similar tube <br />' sampler which can be sealed, is best <br /> 2 The samples should be sealed In the liner, with teflon plugs (The "California Sampler") or plastic <br /> caps <br /> i <br /> 3 For sending whole-core samples (above) <br />' A Seal ends of liner with teflon plugs or plastic caps, leaving no free air space inside <br /> i <br /> B Tape with duct tape <br /> C Label the sample with the following information sample identification, depth,date and time, <br /> project number and required analyses <br /> 1 D Place in plastic bag labeled with indelible marker Use Well #, depth, date, and job # <br /> E Place inside a second bag and place a labelling tag inside outer bag <br /> F Enclose samples in a cooler with sufficient ice or dry ice to maintain samples at 4 degrees <br /> C during shipment <br /> G Seal cooler with a lock, or tape with samplers signature so tampering can be detected <br />' H Package cooler in a box with insulating material Chain of custody forms can be placed <br /> in a plastic bag in this outer box <br /> If dry Ice is used, a maximum of 5 pounds is allowed by Federal Express without special <br /> documents(documents are easy to obtain but are not necessary for under 5 pounds) Write <br /> "ORM-A dry Ice", " pounds, for research" on outside packaging and on regular airbill <br /> under classification UPS does not accept dry ice <br /> J Soil cores kept a 4 degrees C are only viable for up to 7 days when aromatic hydrocarbons <br /> are involved The lab should prepare the samples in methanol once in the lab <br />' 4 Good sampling practice would include preparing 1 out of 5 samples to be prepared in duplicates <br /> for analysis These 4 out of 20 samples will be used for the following purposes <br /> A One in every 20 samples should be analyzed as a field replicate to evaluate the precision <br />' of the sampling technique A minimum of 1 sample per data set is suggested <br /> 1 B An additional 1 In 20 samples should be selected by sampler to be prepared in duplicate <br /> as alternative to Step (A) Choose a different soil type if available <br /> r <br /> I <br /> GROUNDWATER <br />' <br /> HEMTECHNOLOGY <br />