SITE INFORMATION AND CORRESPONDENCE_CASE 2

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CEMEX Tracy Facility Page 2 of 3 30350 South Tracy Blvd. March 26, 2015 Tracy, California 95376 Concurrent with the public participation period, please provide the EHD certification in writing that all record owners of fee title to the above-referenced site have been notified of your request for closure. This is in accordance with Section 25297.15 of the California Health and Safety Code. Submit a complete list of record owners of fee title and their mailing addresses to the EHD. A form has been enclosed for this purpose. Please submit the information at your earliest convenience. The EHD is in need of information to determine whether the well installation permit issued for installing three monitoring wells in April 1990 was instead utilized for installing the three domestic wells currently at this site. Please provide the well construction logs for the three domestic wells associated with this case. Survey data associated with installing monitoring wells MW-5 through MW-8, and decommissioned monitoring wells MW-4, have not been uploaded to GeoTracker. Please do so immediately. Also, it appears that the top-of-casing elevations for MW-4 and MW-5 have been reversed. Please review the data and, if appropriate, revise the groundwater elevation tables and most current groundwater elevation contour map for 24 September 2013. While reviewing data associated with case closure, the EHD established that instead of seven underground storage tanks (USTs), there were eight USTs. Of these, the EHD has no documentation that a second 6,500-gallon asphalt has been removed. The tank number associated with the UST is 1798002. Please provide the current status of this UST. The EHD has reviewed historical soil and groundwater analytical data and based on this information, has determined that MW-5 must be over-drilled and MW-6 through MW-8 may be pressure-grouted. Please submit a scope of work proposal that details the conditions and construction of the wells and the method and materials to be used to destroy them. To be issued a well destruction permit, the proposal must follow the San Joaquin County Well Standards requirements. After the EHD has approved the well destruction scope of work proposal and the public participation comments have been properly addressed, you may submit an EHD Well and Boring Permit Application form along with a Licensed Contractors' Declaration (LCD), Master File Record (MFR) form, and appropriate fees for each parcel. The permit fee for the destruction of each well is $130. If it can be established that monitoring wells MW-1, MW-2 and MW-3 are really DW-1, DW-2 and DW-3, then a fee of $50.00 will be required for destroying the four monitoring wells (MW-5 through MW-8). J,1 g .I' Please contact Vicki McCartney at (209) 468-9852 or by email at vmccartney(o�sjcehd.com if you have any questions regarding this letter.