SITE INFORMATION AND CORRESPONDENCE_CASE 2

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San Joaquin County Environmental Health Department DIRECTOR 1868 East Hazelton Avenue Linda Turkatte, REHS Stockton, California 95205-6232 PROGRAM COORDINATORS . . Robert McClellon, REHS Jeff Carruesco, REHS,RDI cq' •NSP Website: www.sjgov.org/ehd l Kasey Foley,RENS CFOR Rodney Estrada, REHS Rhone: 209 ( ) 468-3420 Adrienne Ellsaesser, REHS Fax: (209) 464-0138 March 26, 2015 CEMEX Lone Star Aggregates PTP Mr. Bruce H. Eppler, PG 1501 Belvedere Road 5180 Golden Foothill Parkway, Suite 200 West Palm Beach, Florida 33406 EI Dorado Hills, California 95762-9608 Subject: CEMEX Tracy Facility (Former RMC Lone Star Kerlinger Aggregate Plant) 30350 South Tracy Blvd. Tracy, California 95376 Dear Mr. Eppler: The San Joaquin County Environmental Health Department (EHD) has received and reviewed Site Conceptual Model and Well Decommissioning Report (Report), dated 15 October 2014, prepared and submitted by your consulting firm, SOMA Environmental Engineering, Inc. (SOMA), on your behalf for the above-referenced site. In the Report, SOMA documented the destruction of monitoring well MW-4, presented results from conducting a sensitive receptor survey and contaminant fate and transport study, and evaluated site conditions in the context of the Low-threat Underground Storage Tank Case Closure Policy (LTCP) criteria. Based on the evaluation, SOMA has recommended that the site be "granted closure under the LTCP criteria". The EHD concurs that this site should be moved to closure and has discussed this case with the California Regional Water Quality Control Board Central Valley Region (Regional Board). The EHD has prepared a case closure summary to be submitted to the Regional Board for closure notification. The Regional Board will have thirty days to respond to the closure recommendation by the EHD. As required by the LTCP, "municipal and county water districts, water replenishment districts, special act districts with groundwater management authority, agencies with authority to issue building permits for land affected by the petroleum release, owners and occupants of the property impacted by the petroleum release, and the owners and occupants of all parcels adjacent to the impacted property" must be notified of the pending case closure and of their opportunity to submit comments or questions regarding the pending closure to this agency. Those to be notified include, but are not limited to, City of Tracy Water Utilities and San Joaquin County Public Works Utilities Maintenance. Comments should be directed to Vicki McCartney, San Joaquin County Environmental Health Department, 1868 East Hazelton Avenue, Stockton, California 95205-6232. Prior to distribution of the notification, please provide a copy of the draft letter to the EHD for review and comment along with the list of agencies and owners/occupants who will receive the public participation letter. An example letter is available from the EHD, if requested. The public will have sixty days to comment.