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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 />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 />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 />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 />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. Seat 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 />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 />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 />GROUNDWATER <br />TECHNOLOGY <br />