SITE INFORMATION AND CORRESPONDENCE

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rN San Joaquin County DIRECTOR Environmental Health Department Donna Heran,RENS 2 Z 1868 E Hazelton Avenue PROGRAM COORDINATORS Stockton, California 95205 Robert McClellon,REHS _ Jeff Carruesco,RENS,RDI Kasey Foley,REHS CAS/F oFR�`P Website: www.sjgov.org/ehd Linda Turkatte,REHS Phone: (209)468-3420 Rodney Estrada,REHS Fax: (209)464-0138 Adrienne Ellsaesser,RENS October 28, 2013 Frank Spingolo Spingolo Trucking 1011 North Broadway Avenue Stockton, CA 95205 Subject: Spingolo Trucking 1011 North Broadway Avenue Stockton, CA 95205 The San Joaquin County Environmental Health Department (EHD) has received information from the Central Valley Regional Water Quality Control Board (CVRWQCB) that the above referenced site is being considered for closure. It is now necessary to plan and execute the destruction of all wells installed as part of your site investigation and remedial action. The CVRWQCB will not issue a Case Closure Letter for this site, until EHD verifies the wells have been properly destroyed and all onsite waste material have been removed and properly disposed. The wells are to be destroyed within 60 days of the date of this letter or current analytical data for groundwater collected and shall be submitted quarterly to EHD until the wells have been properly destroyed. If the wells are not destroyed or monitored as specified, the EHD will begin enforcement activity for having inactive and abandoned wells at the site. To precede with the destruction of the wells a permit must be obtained from the EHD by a C-57 licensed well contractor that meets with the EHD and the San Joaquin County Well Standards requirements as follows: All wells with unknown construction and/or located in an area of known or suspected area of contamination are to be destroyed by removing all the contents of the well (conductor casing, well casing, screen, filter pack, grout sealant); the cleared borehole is then to be sealed with neat cement by pressure grouting from the bottom upward to a depth of three to five feet below grade. MW-3 is located in an area of known contamination and shall be destroyed by removing all the contents of the well, as soil contamination was reported during installation of MW- 3 at 60 feet below grade surface (bgs) with TPHd at 69 mg/kg, and at 65 feet bgs with TPHg at 1.1 mg/kg; toluene at 0.018 mg/kg; ethylbenzene at 0.026 mg/kg; and xylenes at 0.058 mg/kg). Wells that have laboratory data from the last sampling event that report non-detectable concentrations of contaminants of concern and with acceptable laboratory detection limits, may be destroyed by pressure grouting from the bottom upward, while leaving the well casing in place. The top three feet or more of the well shall be drilled out with an auger that is at least one foot larger than the auger originally utilized to install the well,