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,i <br /> 3.1 Recommendations <br />'l CFM proposes to excavate a 10 foot by 15 foot section of soil to a depth of 28 feet. <br /> At that depth, an OVM measurement will be taken. If the OVM indicates that <br /> VOC's are not present, a confirming soil samplelIwill be taken. If the confirming <br /> soil sample is below the action level for these',compounds, CFM will obtain <br /> permission for San Joaquin County Environmental Health to back fill the <br /> excavation. <br /> i <br /> It. <br /> The back filling will be done using approved protocols using clean soil and pea <br /> j t.. gravel to grade. After the excavation is brought to grade, the site will be returned <br /> to it's present state using a 6 inch concrete cap. <br /> The contaminated soil will be properly manifested. and transported to an <br /> appropriate hazardous waste landfill. Copies of��the manifests will be submitted <br /> r . to San Joaquin County Environmental Health <br /> i; <br /> See Figure 2 for location of excavation. <br /> 4.0 QUALITY ASSURANCE PROGRAM Is <br /> The following measures were taken to ensure that a'; high quality study was <br /> ff conducted and that cross contamination was prevented. <br /> 4 �¢ <br /> ,. 4.1 Equipment <br /> Samples were collected in individual boring tubes to prevent contamination. <br /> 1 4.2 Cross Contamination Prevention <br /> zE <br /> ` All soil sampling equipment was thoroughly cleaned before use. Gloves were <br /> worn while samples are collected and changed between samples, if <br /> appropriate. <br /> 4.3 Chain of Custody <br /> Chain of Custody forms are considered legal documents used to track the <br /> handling of samples. All dates, times, persons and their companies were <br /> listed from the time the sample is collected to Jits ultimate disposal. A Chain of <br /> Custody form was filled out for all samples taken. See Appendix C. <br /> Work Pian Addendum Page 3 <br /> Custom Food Macbinery <br /> ]uiy r, 1993 <br /> 1� ' J <br />