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Geological Technics Inc Page 2 <br />' Ripon Milling Inc <br /> Report of Monitoring Well Installation <br /> Project No 253 2 <br /> July 31, 1995 <br /> I <br /> I 3 Company Health and Safety Coordinator <br /> Name Ray Kablanow <br /> Phone No (209)538-6424 <br /> 2.0 QUALITY ASSURANCE PROGRAM <br /> I The following measures will be taken by Geological Technics Inc to ensure that a high quality study <br /> is conducted and that cross contamination does not occur <br />' 2.1 Equipment <br /> Soil borings may be drilled with a hollow stem continuous flight auger, owned and operated by a <br /> licensed well driller Soil samples may be collected using a 2 inch (i d ) modified California split <br />' spoon 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 includes sample depths, <br /> blow counts if continuous coring devise is not used, horizons of detectable contamination (detected <br /> by field methods), soil classification utilizing the Unified Soil Classification System and sediment <br />' descnption (color, texture, composition, hardness, moisture content, and post-depositional changes <br /> 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 auger (drilling rod, <br /> drilling bits, & auger, etc ) will be thoroughly cleaned before being used and between uses Wash <br /> water may be containerized in DOT approved 55 gallon drums,labeled,and stored on site until their <br /> disposition can be arranged Plastic gloves will be worn during sample collection and changed <br /> between all samples <br />' 2.4 Chain of Custody <br />' Chain of Custody(CofC) forms are legal documents used to track the handling of samples All dates, <br /> times, persons and their companies will be listed from the time the sample is collected to its ultimate <br /> disposal A CofC form will be filled out for all samples collected The CofC will be tracked to ensure <br />' sample integrity <br /> 2S Sample Analysis <br />' Samples will be analyzed for benzene, toluene, ethyl benzene and total xylenes(13TEX),EPA methods <br /> 8020 and 602,and for total petroleum hydrocarbons as diesel, EPA method 3540/8015 modified The <br /> analyses will be performed by Sherwood Laboratories of Hilmar,California State Certification#1400 <br />