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<br /> I � San Joaquin County
<br /> o Environmental Health Department DIRECTOR
<br /> Donna Heran, REHS
<br /> �.: 1868 East Hazelton Avenue
<br /> Stockton , California 95205 -6232 PROGRAM COORDINATORS
<br /> . Robert McClellon, REHS
<br /> -- ` Jeff Carruesco, REHS, RDI
<br /> Kase Foley, REHS
<br /> FOR �� Website: wwwsjgov.org/ehd Linda Turl<tte, REHS
<br /> Phone : (209) 468-3420 Rodney Estrada, REHS
<br /> Fax: (209) 464-0138 Adrienne Ellsaesser, REHS
<br /> August 18 , 2014
<br /> Bill Stoermer
<br /> Fremont Plaza Investments
<br /> 7015 Morton Court
<br /> Stockton , CA 95209
<br /> i
<br /> Subject: Former Apache Plastics
<br /> 2050 Fremont Street
<br /> Stockton , CA 95209
<br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Corrective
<br /> Action Plan (CAP), dated 10 June 2014, prepared and submitted by your consulting firm ,
<br /> Advanced GeoEnvironmental , Inc. (AGE) , on your behalf for the above-referenced site.
<br /> In the CAP, AGE has proposed a work plan that includes:
<br />!I Collecting soil samples for laboratory analysis by advancing a total of three pilot soil
<br /> borings to a depth of 120 feet below surface grade (bsg), to install deep injection wells .
<br /> The proposed injection wells will be screened at depths between approximately 100 feet
<br /> and 120 feet bsg and will be installed northeast from MW-9 and southeast from EW-1
<br /> and VEW-2;
<br /> • Chemical analysis of soil samples for the following constituents: total petroleum
<br /> hydrocarbons as gasoline (TPH-g), benzene , toluene, ethylbenzene and total xylenes
<br /> ( BTEX) , methyl tertiary-butyl ether (MTBE) , tertiary-butyl alcohol (TBA) , di-isopropyl
<br /> ether (DIPS) , ethyl tertiary-butyl ether (ETBE) , tertiary-amyl methyl ether (TAME) , 1 ,2-
<br /> dibromoethane (EDB) , and 1 , 2-dichlorethane (1 , 2-DCA) by a California- certified
<br />'I laboratory;
<br /> • Application of three tri-weekly ISCO injections, under regulatory permit, utilizing wells
<br /> MW-9 , MWA3 , VEW- 1 , VEW-2 , EW-1 and three proposed injection wells. A 5 to 8
<br /> percent hydrogen peroxide solution will be injected into each well during the proposed
<br /> tri-week) events. Performance of background and progress sampling using wells MW-
<br /> 8, MW-9, MW-11 , MW- 13 and VEW-1 , VEW-2, EW-1 and the three proposed injection
<br /> wells ;
<br /> • Post-ISCO sampling to be conducted two months after the final injection event. The
<br />?2 laboratory chemical analysis of groundwater samples will be for: TPH-g , BTEX, volatile
<br /> h organic compounds , inorganic ions bromate, bromide, chloride, nitrate , nitrate as
<br />` nitrogen , nitrate as NO3- , sulfate, aluminum, antimony, arsenic, barium , beryllium ,
<br /> cadmium , chromium III , calcium , cobalt, copper, iron, lead, magnesium , manganese,
<br /> mercury, molybdenum , nickel , potassium , selenium , silver, sodium , thallium , acetone,
<br /> tungsten , vanadium and Hexavalent chromium ;
<br /> •
<br /> Measurement of depth to water (DTVV) in shallow, mid-level and deep groundwater wells
<br /> and remediation wells : Prior to each purge volume , temperature , pH , TDS , oxygen
<br /> reduction potential (ORP) , salinity, turbidity, and dissolved oxygen (DO) will be recorded
<br /> at the monitoring wells ;
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