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Advanced GeoEnvironmental Inc . - 22 March 2010 AGE-NC Project No. 98-0440 RECENEDD i Ms. Lori Duncan '. San Joaquin County Environmental Health Department MAR 242010 600 East Main Street ENVIRONMENT HEALTH. { Stockton, California 95202 PERMIT/SERVICES Subject: Monitoring Well Destruction Report -First Quarter 2010 STRONG PROPERTY 515 'West Business Loop 205,Tracy, California Dear Ms. Duncan: At the request of Messrs. Robert and Mike Strong,Advanced GeoEnvironmental, Inc. (AGE) has prepared this report for the destruction of thirteen ground water monitoring wells (MW-1 through MW-13) at 5157 West Business Loop 205, Tracy, California. The site location is depicted in Figure 1; site structures and former well locations are depicted in Figure 2. INTRODUCTIONIBACKGROUND Thirteen single completed, two-inch diameter, ground water monitoring wells (MW-1 through MW-13)had been installed as part of a subsurface investigation of the former underground storage tank (UST) areas at the site. Monitoring wells MW-1 through'MW-,4 and MW-7 through MW-12 were installed to depths of 25 feet below surface grade (bsg),monitoring wells MW-5 and MW-6 were installed to depths of 30 feet bsg, and well MW-13 was installed to a depth of 79 fee bsg. PROCEDURES r On 19, 20, and 21 January 2010, a total of thirteen (13) ground water monitoring wells were ' destroyed at the site under San Joaquin County Environmental Health Department (EHD) well destruction permit (Appendix A). Well destruction activities were performed by All Well ' Abandonment,Inc. of Placerville,California.Monitoring wells MW71 and MW-13 were destroyed k by grouting the well casings under pressure and over-drilling each well to three feet bsg. The remaining wells were destroyed by over-drilling to their total depth an�backfilling with neat cement. I 3 837 Shaw Road, Stockton,California 95215 a Telephone (209) 467-1006 Fax (209)467-1.1 18 i