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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 /> 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. 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 /> 1. 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 /> 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 /> 1� <br /> SOP 15 Page 1 of 2 <br /> �DICROUNDWATER <br /> SILIJTECHNOLOGY,INC. <br />