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t <br /> March 15, 1996 l t,r EYE Ir 9r f r <br /> WALLACE •KUHL C ?&.°i7 ,'r >,J� AL lI'I <br /> &ASSOCIATES INC. <br /> Mr. Harlin Knoll ' �= <br /> San Joaquin County Public Health Services 1 1 9: <br /> P.O. Box 388 <br /> Stockton, California 95201-2009 <br /> PROJECT WORK SCOPE AMENDMENT <br /> GRANITE CONSTRUCTION <br /> 10500 South Harlan Road <br /> French Camp, California 95231 <br /> Dear Mr. Knoll, <br /> I <br /> On behalf of Granite Construction, we are amending our project work scope for the <br /> _ _ m aboye referenced.site. The purpose_of.the_project_amendment is.to change,the—. <br /> sampling frequency of eight groundwater monitoring wells (MW1 through MW8). In� <br /> addition, we will discontinue analyzing water samples for Total Petroleum <br /> Hydrocarbons (TPH) as diesel due to the lack of detectable concentrations in <br /> previous samples. <br /> The eight monitoring wells will be sampled on.the following schedule: <br /> • MW1 through MW3 - Quarterly sampling <br /> �w <br /> • MW4.-and MW8 - Alternating semi-annual sampling <br /> • MW5 and MW6 - Discontinue sampling <br /> s MW7 - Annual Sampling <br /> Our next quarterly sampling is scheduled for April 1996. During the April sampling <br /> - Geotechnical Engineering event,groundwater measurements will be obtained from each well. In addition, two <br /> composite soil samples will be collected from the stockpiled soil located southwest of <br /> Engineering Geology the former UST locations. The two composite soil samples will be analyzed for TPH t <br /> " as gasoline and diesel using modified EPA Method 8015 and Benzene, Toluene, <br /> Environmental Consulting Ethylbenzene, and Xylenes using EPA Method 8020. Analytical results of the <br /> stockpile samples will be provided our next quarterly sampling report. <br /> - Remediation Services' <br /> If you have any questions, please.do not hesitate to contact our office (916) 372- <br /> Construction Inspection 1434. k <br /> ` Materials Testing W-7alla�ce ■ Kuhl & Associates, Inc. <br /> Michael Watari <br /> 3050 Industrial Blvd: <br /> Staff Engineer ., . <br /> West Sacramento - <br /> MMW:FJH:sdm <br /> CA 95691 <br /> Fax 916.372.2565 cc: Mr. Hop Essick, Granite Construction <br /> a M\W8M5.LT1 <br /> Z"_ `' 916.372.1434 <br /> Recycled paper - . <br />