SITE INFORMATION AND CORRESPONDENCE FILE 2

Home Browse Search

Lisa Medina [EH] From: Magee, Amanda <Amanda.Magee@stantec.com> Sent: Monday,June 03, 2013 11:40 AM To: Lisa Medina [EH]; aellsaessar@sjcehd.com; Nuel Henderson [EH] Cc: Lichtenberger, Deborah; Manning, Danielle;Tanner,Jennifer Subject: 7-11 #14117, 2725 Country Club Boulevard, Stockton, well destruction Attachments: 14117_Figure_1_site_plan.pdf; 14117_MW-2_log.pdf; 14117_2013_05_29 _stantec_rec_of_conv_sjcehd.pdf LOP No.: 1073 7-Eleven Store#14117 2725 Country Club Boulevard Stockton, CA Dear Ms. Medina, Per our recent conversation, Stantec Consulting Services Inc. (Stantec), on behalf of 7-Eleven, Inc. (7-Eleven), is submitting this email scope of work for the destruction of one onsite groundwater monitoring well (MW-2) at the 7-Eleven Store#14117 located at 2725 County Club Boulevard in Stockton, California. MW-2 is located in the center of the underground storage tank (UST) pit, between the two USTs (see attached figure). Due to a tank failure, 7-Eleven has scheduled the USTs at this location to be removed. As such, Stantec, on behalf of 7-Eleven, is requesting approval of the following scope of work to destroy groundwater monitoring well MW-2. Records show that MW-2 was installed on May 13, 1999 by advancing a two-inch poly-vinyl-chloride (PVC) pipe through an existing 10-inch PVC conductor casing that extends to 13 feet below ground surface (bgs) (Attached MW-2 Log). Please note that UST removal activities are scheduled to begin on June 17, 2013. Stantec would prefer to properly destroy monitoring well MW-2 prior to the UST removal. SCOPE OF WORK Permitting/Utility Clearance— Upon approval of this scope of work, Stantec will secure expedited well destruction permits with the San Joaquin County Environmental Health Department(SJCEHD). Prior to conducting subsurface work at the site, Underground Service Alert(USA) and a private utility locator service will be contacted to delineate subsurface facilities. Health and Safety -Stantec will modify the existing site-specific Health and Safety Plan for the scope of work as required by the Occupational Health and Safety Administration (OSHA) Standard "Hazardous Waste Operations and Emergency Response"guidelines (29 CFR 1910.120). The document will be reviewed and signed by Stantec personnel and subcontractors performing work at the site. Well Destruction—Due to the location of MW-2 between the two USTs, Stantec is requesting a variance from the SJCEHD requirement to overdrill the well to total depth. As suggested by Mr. Newel Henderson of the SJCEHD, it may be acceptable to destroy the well by pressure grouting from the bottom of the well to 13 feet bgs. The groundwater monitoring well PVC casing will be pulled out; the remaining 10-inch PVC conductor casing and the well box will be removed during the UST removal activities. WASTE DISPOSAL Debris generated during well destruction will be temporarily stored at the 7-Eleven site in Department of Transportation- approved 55-gallon drums, pending analytical profiling and offsite disposal. REPORTING Upon receipt by Stantec of waste disposal documentation, a report documenting the well destruction activities will be submitted to the SJCEHD. i