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Corrective Action Plan 1./ Page 10 Cutter/Western Lift Site GPE Project No. 102.3 December 12,2003 5.0 SOIL & GROUNDWATER SAMPLING & ANALYSIS PROCEDURES 5.1 Soil Sample Collection During drilling, soil samples will be collected for geologic and possible analytical evaluation on five-foot intervals in each boring unless otherwise noted. The following is a description of the methods used in collecting soil samples. In hollow stem auger borings, soil samples will be collected for geological and analytical evaluation at five-foot intervals using a 2.0-inch diameter by 1.5-foot long (i.d.) hammer 6.0 driven California Split Spoon sampling device fitted with three 2 by 6 inch stainless steel liners. The soil sample collection procedure will be as follows. The end of each sample tube removed from the split spoon will be sealed with aluminum foil, capped with plastic end caps, secured with tape, labeled and placed in a cooler at 4° Celsius for transport to the laboratory using Chain of Custody protocol. Chain of Custody (CofC) forms are documents used to track the handling of samples. All dates, times, persons and companies handling the samples will be listed from the time the sample is collected to its ultimate analysis. All soil sampling equipment will be decontaminated between uses by washing using a steam cleaner. Nitrile gloves will be worn during sample collection and changed between the collection of each sample. A detailed log will be made of each boring. The information to be noted include such data as sample depths, blow counts from hammer driven sampling devices, horizons of detectable contamination (detected by field methods), soil classification utilizing the Unified Soil Classification System and sediment description (color, texture, composition, hardness, moisture content, and post-depositional changes that have occurred in the sediments). 5.2 Air Sample Collection Air samples will be collected at various times during the operation of the remedial system. Samples will be collected in a Tedlar bag attached with Tygon tubing to a hand-operated air pump and the appropriate air sampling port. Interim OVM readings will be made in the field by attaching the instrument to another Tedlar bag filled in the same manner. Closing a nylon valve on the sample bag will immediately seal samples intended for laboratory analysis, and the bag will be placed in a cool environment for immediate transport to the analytical laboratory. A chain of custody document, listing all samples collected and their intended analyses will accompany the samples from field to the laboratory, thereby providing a means to track their movement and insure their integrity. 5.3 Soil Sample Analysis Soil samples will be shipped to a state certified analytical laboratory for analysis. Note that not all soil samples collected are likely to be submitted for laboratory analysis. Field 2937 Veneman Ave.,#B240 Geo-Phase Environmental Inc. Phone(209)569-0293 Modesto,CA 95356 Fax(209)569-0295 .,r