SITE INFORMATION AND CORRESPONDENCE FILE 2

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RECEIVEDCardf. _ 1 1117 Lone Palm Avenue ATC DEC 15 2014 Suite 201B Shaping the Future Modesto, CA 95351 :[NVIRONMENTALHEALTH Phone +1209 579 2221 PERMIT/SERVICES PUBLIC NOTICE Fact Sheet Pending Case Closure for Leaking Underground Storage Tank Site Cardno ATC, on behalf of the San Joaquin County Environmental Health Department (SJCEHD), invites public comment regarding consideration by the SJCEHD to grant regulatory closure for the leaking underground storage tank (LUST) case at the subject site(Site)identified below: SUBJECT SITE: Site Name: Circle K Store No 1205 GeoTracker Global ID No. T0607700822 Site Address: 16470 Cambridge Drive,Lathrop,CA SJCEHD Site Code: 507198 -- ---PUBLIC COMMENT PERIOD: 40 Days—from (December 15, 2014)to{Februery 1-2,406)- -CASE SUMMARY: The SJCEHD and the Central Valley Regional Water Quality Control Board (CVRWQCB), in cooperation with Amarjit Singh Khinda(property owner), Phillips 66 Company(responsible party)and Cardno ATC (environmental consultant) have evaluated soil and groundwater conditions, and potential health concerns at the subject Site resulting from an unauthorized release of (gasoline, diesel, etc.)from an underground storage tank (UST) system. The unauthorized release from the UST system was discovered in November 1997 when the USTs, product dispensers, and associated product piping were removed from the site during a facility upgrade.At the current time there is not an active UST system on the Site. Soil and groundwater investigations were conducted from July 1998 to January 2009, to characterize impacted soil and/or groundwater, and Cardno ATC determined the extent to which the petroleum hydrocarbons have impacted soil and groundwater. The impacted soil was limited to the general vicinity of the former USTs on-site. The impacted groundwater historically extended off-site approximately 80 feet north. In November 1997, impacted soil was excavated from beneath the USTs and impacted groundwater was extracted from the UST excavation. Dual phase extraction, soil vapor extraction, and ozone sparging was conducted to remediate the soil and groundwater at this site. Cardno ATC estimates that approximately 8,400 pounds of contaminants have been removed from the site through active remediation. Potential negative effects of the residual contamination on human health and the environment were evaluated by Cardno ATC, and found to be negligible. The site characteristics pass the Low-Threat Underground Storage Tank Case Closure Policy (LTCP) criteria recently adopted by the State Water Resources Control Board (SWRCB). On the basis of groundwater monitoring and the site characterizations passing the LTCP criteria, and the recommendation of Cardno ATC the SJCEHD has concluded that the Site status is protective of the environment and human health for current and future Site use and for adjacent off-site areas. The SJCEHD will submit Case Closure Summary to the California Region Water Quality Control Board (CRWQCB). Once the SJCEHD receives and responds to the comment from CRWQCB and has addressed all public comments received, the SJCEHD anticipates issuing a No Further Action Required letter for the subject Site. WHERE TO GET MORE INFORMATION Site information can be obtained from the GeoTracker website at hftp://geotracker.waterboards.ra.gov/. Upon written request, the Site case file is available for review at the SJCEHD office located at 1868 East Hazelton Avenue, Stockton, California 95205. An SJCEHD file review request form can be obtained from the SJCEHD website at http://www.sjcehd.com. HOW TO PARTICIPATE Interested individuals have the opportunity to learn more about this case and voice concerns regarding its pending closure by submitting comments to Angelica Sandoval Marin at the SJCEHD. Angelica Sandoval Marin can be reached at (209) 468- 2807,via e-mail at amarinasicehd com,or in writing at 1868 East Hazelton Avenue, Stockton, California 95205. Australia • Belgium • Canada • Ecuador • Germany • Indonesia • Italy • Kenya New Zealand • Papua New Guinea • Peru • Tanzania • United Arab Emirates United Kingdom • United States • Operations in 85 countries