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San Joaquin County
<br /> C, Environmental Health Department DIRECTOR
<br /> 1868 East Hazelton Avenue Linda Turkatte, RENS
<br /> Stockton, California 952056232 PROGRAM COORDINATORS
<br /> Robert McClellon, REHS
<br /> -- Jeff Carruesco, REHS, RDI
<br /> c
<br /> Kasey Foley, REHS
<br /> 4,cii. �� Website: www.sjgov.org/ehd Rodney Estrada, REHS
<br /> Phone: (209) 468-3420 Adrienne Ellsaesser,REHS
<br /> Fax: (209) 464-0138
<br /> December 19, 2014
<br /> Swaran Chouhan
<br /> 1632 Paola Place
<br /> Manteca, California 95337-8612
<br /> Subject: Super Center Mart
<br /> 701 East Charter Way
<br /> Stockton, California 95206
<br /> Following the subject site's dual phase extraction (DPE) remediation system shutdown on 29
<br /> January 2014, two post remediation groundwater rebound monitoring events have occurred; the
<br /> first on 28 May 2014 and the second on 27 August 2014. The San Joaquin County Environmental
<br /> Health Department (EHD) determined that contaminant concentrations appeared to be strongly
<br /> rebounding in groundwater monitored by MW-1. In addition, groundwater monitored by MW-6 has
<br /> exhibited a consistent increase in contaminant concentrations since April 2010. By letter dated
<br /> 13 November 2014, the EHD recommended that the State Water Resources Control Board
<br /> Cleanup Fund (Fund) approve, at minimum, two more quarterly groundwater monitoring events to
<br /> further evaluate contaminant concentration trends at the subject site.
<br /> By telephone conversation with Fund staff on 17 December 2014, the Fund concurs with the
<br /> EHD's recommendation to perform two additional rounds of groundwater monitoring. Your
<br /> consulting firm, Advanced GeoEnvironmenal, Inc. (AGE), has notified the EHD that these events
<br /> are planned to occur during the 4th quarter 2014 and the 1St quarter 2015. The EHD directs that
<br /> monitoring wells MW-1, MW-2, MW-3, MW-4, MW-6, MW-8A, and MW-9A be sampled during
<br /> these groundwater monitoring events and analyzed for total petroleum hydrocarbons as gasoline
<br /> (TPH-g); benzene, toluene, ethylbenzene and total xylenes (BTEX); methyl tertiary-butyl ether
<br /> (MTBE), ethyl tertiary-butyl ether (ETRE), tertiary-amyl methyl ether (TAME), di-isopropyl ether
<br /> (DIPE), tertiary butyl alcohol (TBA), 1,2-dichloroethane (1,2-DCA) and 1,2-dibromoethane (EDB).
<br /> Please notify the EHD at least 5 working days prior to conducting the sampling events.
<br /> If you have any questions concerning this letter, please contact Gabriel Gonzalez at (209) 468-
<br /> 3442, or by ernail at gagonzalez@sjcehd.com.
<br /> Sincerely,
<br /> �"v'
<br /> rely,
<br /> SGL
<br /> Gabriel Gonzalez Nuel Henderson, PG
<br /> Environmental Health Specialist Engineering Geologist
<br /> c: Daniel Villanueva, Advanced GeoEnvironmental, Inc., 837 Shaw Road, Stockton,
<br /> California 95215
<br /> ec: GeoTracker
<br /> James L.L. Barton, PG, California Regional Water Quality Control Board Central Valley
<br /> Region, via GeoTracker
<br />
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