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3 11aO y tkjtl COUtIty
<br /> e)lz. . . . . Environmental Health artment VIR&CTOR
<br /> Donne Heran, REHS
<br /> z a 1868 East Hazelton Avenue
<br /> n I < _ PROGRAM COORDINATORS
<br /> tockton , California 952055232
<br /> t3 , �sRuberr Mi Clellou RC:kiS
<br /> —.. _. ....... . ._...—.—..._ --_..___ Jeff Garruesro, REI-IS, RDI
<br /> Website; swvvw. 4"jgo%?org1eh€1r K ey Foley, f FHS
<br /> r Phone. 209 468CI I420 Lindaa Turk atie. REHS
<br /> t Rodney Estrada, REHS
<br /> Fax: (209) 464 01 3Er Adrienne Ellsaesser, REHS
<br /> August 18, 2014
<br /> Bill Stoermer
<br />! Fremont Plaza Investments
<br /> 7015 Morton Court
<br /> Stockton , CA 95209
<br /> Subject, Former Apache Plastics
<br /> 2450 Fremont Street
<br /> Stockton, CA 95209
<br /> 1 The San Joaquin County Environmental Health Department (EHD) has reviewed Corrective
<br /> Action Flan (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 /> I In the CAP, ACE has proposed a work plan that includes :
<br /> 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 EWA
<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) , Elksopropyl
<br /> ether (DIPS) , ethyl tertiary-butyl ether (ETBE) , tertiary-amyl mothyl ether (TAME) , 1 ,2-
<br /> dibromoethane (EDB) , and 1 ,24chlorethane ( 1 ,2-DCA) by a California- certified
<br /> laboratory;
<br /> ® Application of three triweekly 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-weekly 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 /> laboratory chemical analysis of groundwater samples will be for: TPH-g, BTEX, volatile
<br /> 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 /> Measurement of depth to water (DTW) 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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