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Report-Well Abandonment Page 3 Western Lift/ Cutter Lumber Site- Case 2 GPE Project No. 102.3 March 28, 2014 2.0 Well Abandonment A total of 16 wells were destroyed. These wells were a mix of groundwater monitoring wells, vapor extraction wells, and air sparge wells. In general, wells in the close vicinity of the release point were destroyed by over drilling, while those wells in peripheral areas that were uncontaminated, were destroyed by pressure grouting. The following table summarizes the identity of the various wells and the abandonment method selected. The well identities are also shown on the site map in the figures. Abandonment Monitoring Wells TD Csg Dia Hole Dia Method* ,�-1 MW-6 V 45 2 10 OD ✓ ✓2 MW-7 V 45 2 10 OD -/3 MW-8B✓ 45 2 10 OD ✓ L,-4 MW-9 45 2 10 PG 5 MW-10 45 2 10 PG ✓� MW 11✓ 45 2 10 PG Vapor Extractors f VEW-1 45 4 12 OD ✓8 VEW-2 ✓ 45 4 12 OD -� ✓9 VEW-3 45 4 12 OD X10 VEW-4�/ 45 4 12 OD 11-1- VEW-5 45 4 12 OD " "--12 VEW-6/ 45 4 12 OD Sparge Wells 13 ASW-1 55 2 12 OD-41- ASW-2 v 55 2 12 OD ✓15 ASW-3 V 55 2 12 OD - 16 ASW-4-,J 55 2 12 OD * OD=Over drill/PG=Pressure Grout The following sub-sections describe the work completed to abandon the wells. 2.1 Preparatory Work A Work Plan describing the field procedures was submitted to the SJC-EHD on August 9,__'/ 2013 and it was approved on August 26, 2013. /An application for a permit to abandon the was submitted to the SJC-EHD on November 8, 2013 and the permit was issued on the same day. In addition, a City of Stockton encroachment permit was obtained on December 5, 2014 to cover destruction of a well located on the shoulder of S. El Dorado Street. The SJC-EHD was subsequently notified that the final well abandonment was 2937 Veneman Avenue,Suite B240 Geo-Phase Environmental Inc. Phone: (209)569-0293 Modesto,Ca 95356 Fax: (209)569-0295