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Quarterly:Rep . - August'T999 <br /> ` WELDON CHURCH PROPER <br />' 104,''West,'BeverlyPlace ? w <br /> Tracy, California,l <br /> 1.0. INTRODUCTION `r G ', <br /> '-4 4At.the"request of IVII We. Church;Advanced•GeoEnvironmental- Inc:N(AGE),has'.prepared this' <br /> a� <br /> I he sco fQuarterl Report for the�site'af 104.WestBeverl Place ,TracY� California the site) Tao !' <br /> 11 <br /> work included:monitoring,and l sampling seven wells, obtaining laboratory analyses of the-samples <br /> and'`preparation of this,'report..The site'setting is illustrated-on Figure 1. Locations of structures,' ' <br /> f borings and monitoring­wells related to the'site are illustrated on Figure'2. <br /> Site history and firidings;from,previou's investigatiorisand previous rhorutoring eve'nts'at the site are <br /> I. detailed%in the,Preliininary Investigation and'Evaluation�Report-SepterMber.199b.(PIER),prepared' , <br /> 2:0. PROCEDURES <br /> The; work was perforined .iri accordance with San _Joaquin County' Public .Health Services <br /> • <br /> '`' Environmental,Health`Division-(PHS'�EHD),and'Centrai•Valley Regicinai VAter, <br /> ality gontrol ' <br /> Board guidelines for investigation of underground storage„tank,(UST) sites <br /> I' 2.1: MONITORING,WELL PURGE PROCEDURES <br /> On 24 August'199.9,.,a.So'linst water"lev.el''riieter was used'to measilre'the depth:to ground water iri <br /> l r each well°relative to the`tops:of the well casings" After ground water depth'measurements'were r` <br /> collected,each monitoring well'was purgedrusingaawo-s"tage submersible pump,Apprnximately'3, � <br /> ib`8 .galions of water'were evacuated ,from;each.monitoring well (a miriiziium:three-well;casing. Idl " <br /> ' 'r, <br /> volumes)'`as app' 'ropriate'ill I for'each_'.-+well <br /> Temperature; pH and conductivity;were,measured•at.l-gallon or 2-gallon intervals, as appropnate� t <br /> using Ah ICM made152200 water analyzer to.monitor,stabilization'ofthese groundwater parameters. <br /> Fleld`'data logs are,included in Appendix A. P,4iged water was temporarily stored ori=site In SS=gallon <br /> t. drums. r r <br /> L 2'2. COLLECTION'AND <br /> ANALYSIS'OF GROUND WATER;SAM ' <br /> i,.. Water samples were collected from`eaeh Inoriitoring;well using riew'disposable,baiiers after allowing <br /> ; <br /> the,well s to'achieve a.`mir imum SO% recovery of,the:'pre purge,water volume'.The samples'were <br /> I <br /> transferred into .40-ml ,TEPA-approved .vials containing r0:5 nil 18% hydrochloric acid as a <br /> preservative. The sample vials-were tlien'lab'eled with the monitoring.we11,designat ion, date;time <br /> Advanced GeoEiwironmenial,Inc.. <br /> Y. <br /> . - F ,.1 V ` iV 1 II ' I 1- 1 1�'',. • r I, t - ,I`',. <br />