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r <br /> r <br /> Quarterly Report - January 199? <br /> ARCO MINI-MART <br /> 4511 Pacific Avenue, Stockton, California <br /> 10 INTRODUCTION AND SCOPE OF <br /> WORK <br /> In aecordance with the request of Mr Art Wyatt, Advanced GeoEnviaoiirnental, Inc <br /> (AGE) has <br /> Prepared this Quarterly Report for the site located at 4511 Pacific (Avenue, Stockton, California the <br /> site) The scope of work was to assess the lateral extent and concentrations of hydrocarbon-im a <br /> sort and monitor ground water at tl�e site Fiel <br /> water Inonitoritig wells, ground <br /> d activities included the In5ta11ation of fn p cted <br /> one soil boring and the collection and analysis of soil and ground water <br /> samples Results of ground water sampling conducted In September 1996 are also included in i <br /> I eport ahis <br /> Site history and a description Ofpievious work peiformed at the site were detailed in the <br /> r R-'P`t -lldar ch 1996 dated 30 April 1996, Piepazed by AGE The Aust re,ly <br /> d <br /> in 1~Iguze 1 - Locarron �Iap Sti-uctulcs, moiiltoring well and loll boring airsiteIs strated <br />' Figure - Sire P1al� Illustrated in <br /> N10111(011119 was per forrried in accordance with Sart Joaquin County Public Health , _ <br /> Envii0nn,ewal Health Division (PHS-EHD) and Central Valley Regional Wates ualit eContr 13oaid (CVRWQCg) gt,idclines far invests at Q y Control <br /> investigations of underground storage tank (UST) ,Iter <br /> 20. PROCEDURES <br /> 21 FRET PRODUCT REMOVAL <br /> During quarterly monitoring and sampling in September- 1996, free phase petroleum17 roduct was <br /> encounteied at the site, in soil vapor well VW-1 Therefore,Storage r t <br /> Storage Tank Regulations, Article 5, Section 2655, the Iernoac ofthe s� pr duct aasCalifoinia derground - <br /> requiied <br /> Betureeil Scpteinber 1996 ai�d January 1997 incasurernerits of free product thickness were collected <br /> from vapor well VW-1 on a weekly basis Approximately six inches of product was <br /> measuied in September 1996 After measurement, free product was removed using a disposable hand <br /> bailer Free product was stored rig,-site 11, 55-gallon OT N_ d <br /> Of ground watEr aid free product were removed frons VW-Ilbetween Se�'tem e total ,�e i S rz�Il <br /> �; 1..i gal oris <br /> 1997 Fhe current free product level was approximately one-tenth of anpiric17b i 1996 and January <br />