Laserfiche WebLink
Geological Technics IN-W Page 1 <br /> Appendix C Quality Assurance Program <br /> Former Moresco Property <br /> May 12, 1995 <br /> 1.0 QUALITY ASSURANCE PROGRAM <br /> The following measures were taken by Geological Technics Inc. to ensure that a <br /> high quality study was conducted and that cross contamination does not occur. <br /> 1.1 Equipment <br /> Soil borings were drilled with a 7.25 inch (o.d.) hollow stem continuous flight <br /> auger, owned and operated by Osterberg & Stewart Inc. (C57 license # 446670). <br /> Soil samples were collected using a 2.5 inch (i.d.) modified California split spoon <br /> sampler lined with brass sample using a continuous coring device. <br />,W 1.2 Boring Logs <br /> A detailed log for the boring was maintained by a professional geologist working <br />.� under the supervision of a registered geologist. The information noted includes: <br /> sample depths, horizons of detectable contamination (detected by field methods), <br /> soil 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 /> L- 1.3 Cross Contamination Prevention <br /> All sample equipment (split spoon sampler or core tube, brass tubes, bailer, & <br />+- pumps) and auger (drilling rod, drilling bits, & auger) was thoroughly cleaned <br /> before being used and between uses. Plastic gloves were worn during sample <br /> collection and changed between all samples. <br /> 1.4 Chain of Custody <br />`o Chain of Custody (CofC) forms are legal documents used to track the handling of <br /> samples All dates, times, persons and their companies are listed from the time <br /> the sample is collected to its ultimate disposal. A CofC form was filled out for all <br /> samples collected. The CofC is tracked to ensure sample integrity. <br /> 1.5 Sample Analyses <br /> Soil samples were analyzed for benzene, toluene, ethyl benzene and total xylenes <br /> (BTEX) by EPA method 8020 and total extractable petroleum hydrocarbons <br /> (TEPH) by EPA method 8015 modified. The detection limit for benzene, toluene, <br /> ethylbenzene and total xylenes is 5.0 µg/kg (ppb), and 5.0/50 mg/kg for TEPH. <br /> 6r <br /> 4 <br />