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4.5 EXTERIOR SOIL VAPOR SAMPLING <br /> Two additional multi-depth exterior soil vapor probes shall be installed as part of this VI evaluation to <br /> further delineate vadose zone VOC conditions.The proposed locations for these probes (SV-131 and <br /> SV-132) are presented on Figure 3.The proposed probe depths for each multi-depth probe are 5, 10, <br /> and 15 feet bgs. These probes will be installed and sampled in general accordance with the DTSC <br /> Advisory and the Revised Work Plan. Soil vapor sample collection will not occur during or within <br /> 48-hours after a significant rain event. A significant rain event is defined as%: inch or greater of rainfall <br /> during a 24-hour period.The sampling event will be timed to coincide with the VI sampling for the <br /> adjacent fire station. <br /> 9 HA=Vit <br /> 15RICH <br />