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Health& Saftey/Qualit, surace Plans Page 3 <br /> Olsen(Vernalis) <br /> Project No.248.2 <br /> January 3,1995 <br /> 2.0 QUALITY ASSURANCE PROGRAM <br /> The following measures will be taken by Geological Technics Inc. to ensure that <br /> a high quality study is conducted and that cross contamination does not occur. <br /> 2.1 Equipment <br /> Soil borings may be drilled with a 7.25 inch (o.d.) hollow stem continuous flight <br /> auger, owned and operated by Osterberg and Stewart, Inc. (C57 Lic. #446670) <br /> Soil samples may be collected using a 2 inch (i.d.) modified California split spoon <br /> sampler, or continuous coring device, lined with brass sample tubes. <br /> 2.2 Boring Logs <br /> A detailed log will be made of each boring. The information to be noted <br /> includes: sample depths, blow counts if continuous coring devise is not used, <br /> horizons of detectable contamination (detected by field methods), soil <br /> classification utilizing the Unified Soil Classification System and sediment <br /> description (color, texture, composition, hardness, moisture content, and post- <br /> depositional changes that have occurred in the sediments). <br /> 2.3 Cross Contamination Prevention <br /> All sample equipment (split spoon sampler or core tube,brass tubes etc. ) and <br /> auger (drilling rod, drilling bits, & auger, etc.) will be thoroughly cleaned before <br /> being used and between uses. Plastic gloves will be worn during sample <br /> collection and changed between all samples. <br /> 2.4 Chain of Custody <br /> Chain of Custody (CofC) forms are legal documents used to track the handling of <br /> samples All dates, times, persons and their companies will be listed from the <br /> time the sample is collected to its ultimate disposal. A CofC form will be filled <br /> out for all samples collected. The CofC will be tracked to ensure sample <br /> integrity. <br />