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Report.-Well Abandonment Page 4 Western Lift/ Cutter Lumber Site- Case 2 GPE Project No. 102.3 March 28, 2014 scheduled to begin on January 27, 2014. All wells were destroyed between January 27 and-January 31, 2014. , 2.2 Overdrilling . On January 27, 2014, V&W,Drilling (C-57 #720904) mobilized to the site with a BK-81 hollow stem auger drilling rig for the purpose of abandoning the;wells. The following steps tasks were performed.to abandon the;wells destroyed by over drilling (see table above for list). Mr. Johnny,Yoakum and Ms-Angelica Marin of the SJC-EHD witnessed all well abandonments. Each well was opened and the locking well cap was removed. Dedicated nylon tubing was also removed from monitoring wells. Next, the well box was removed and disposed of. The rig was then used to-drill out.the wells to their total depth using bits at least as large in diameter as the original boring. In the case of the sparge wells, a suitable sized casing mandrel was not available for the 12.inch augers. In lieu of this a 10-inch bit was fitted with.steel tabs welded.to the sides of the bit to produce a 12-inch boring. During drilling, cuttings were monitoring with a PID organic vapor meter to assure that petroleum vapors did not exceed levels deemed safe for level D.PPE. During drilling, the maximum PID reading encountered was 6 ppmv. The drill cuttings were temporarily stored in a stockpile located on the site. No soil samples were collected from the bored out wells for analysis nor were boring logs made. Upon reaching total depth of each well, the drilling augers were removed and the boring was closed by filling it with Class I/II neat cement grout through a tremie pipe. 2.3 Pressure Grouting Three wells that were in uncontaminated areas,Were destroyed by pressure grouting. The following steps were performed to abandonment wells by pressure grouting. The wells were opened and the locks and locking caps removed. The dedicated tubing was removed from monitoring wells. V&W Drilling personnel prepared Type 1/It neat cement for use as grout. Each well was fitted with a 2-inch or 4-inch pressure cap, as needed. Neat cement was then pumped into each well using a pneumatically actuated grout pump. Pumping continued until positive pressure of approximately 25 pounds per square inch (psig) was reached at each wellhead, and the pressure was maintained for approximately five minutes; The casing volume of each well was calculated and the amount of cement grout used was monitored to assure that the grout volume exceeded the casing volume to assure that the grout and flowed through the slots and into the surrounding gravel pack of the completed interval. In all cases, the volume of grout pumped exceeded the casing volume by at least 150 percent. 2937 Veneman Avenue,Suite B240 Geo-Phase Environmental Inc. Phone: (209)569-0293- Modesto,Ca 95356 Fax: (209)569-0295