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ARCADIS <br /> These were provided to me by TEG Northern California who will conduct the drilling and soil gas sampling <br /> and on-site analyses. <br /> First, the rive probes shown are proposed on THREE parcels,and not the two as you noted on <br /> Figure 3 of your plan. <br /> Please see our response to no. 6 below. <br /> 1-1 need a well/probe diagram of the construction of the probes with materials listed/shown. <br /> Please refer to the attached documents provided by TEG Northern California. The temporary borings will <br /> be advanced using direct push drilling methods. The 1-inch diameter steel drill rods will be pushed to the <br /> target depth. The soil gas sample tube will be pushed at the same time inside the drill rods. The drill rods <br /> are pulled up to allow soil gas to enter the sample tube.A leak test will be performed. The sample tube will <br /> be purged before collecting a soil gas sample. The soil gas sample will be analyzed immediately after <br /> sample collection in the mobile lab. After sample collection and analysis is completed, the drill rods and <br /> sample tubing will be pulled out of the ground.The temporary soil boring will be abandoned using cement <br /> grout immediately after the drill robs and sample tubing are pulled out of the ground. If necessary and <br /> requested by SJCEHD, the temporary soil boring may be left open until the grout inspector is available to <br /> witness the abandonment procedure.All borings will be abandoned the same day they were advanced, <br /> and no materials will be left in the temporary soil borings except for a disposable steel drill tip. <br /> 2-a description of the method of destruction and materials(cement grout, bentonite, etc)is <br /> needed. <br /> As noted above, the temporary soil borings will be abandoned using cement grout poured into the boring <br /> after the drill rods and sample tubing are removed. <br /> 3- a statement WHEN these probes are to be removed/destroyed'is needed. (if NOT on the same <br /> day as installed then see#4&#5,) <br /> The temporary soil borings will be abandoned the same day after drilling is completed, either immediately <br /> after the drill rods and sample tubing are removed, or if necessary, as soon as the SJCEHD grout <br /> inspector is available. No borings will be left open overnight. <br /> 4-a statement that includes the probes will remain in place and 111 need a description/schematic of <br /> the method,materials, and procedures that will be used to install the traffic box that is required. <br /> Probes left in place over-night are considered'wells'and as such, must be protected at the surface <br /> with a secured box and seal, like any vapor, monitoring, or sparge well. <br /> j YechdaRemg1g6790.hrucal .bas vhuWpvmlejtl,d dMing pgmitYev permit aro padrage ls4-torynano_sPm l —n W MWIO dm Page: <br /> 2/3 <br />