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PACIFIC <br /> ENVIRONMENTAL f <br /> - <br /> =�t� � <br /> �i. ' ..M <br /> .�._:. GROUP INC. �r <br /> VP,f' 7 <br /> �i <br /> SEP <br /> l ; <br /> 5 41f 9. <br /> September 4, 1997 i� <br /> Project 940-001.1 A 'I i <br /> Mr:Ron Zielinski f e <br /> Texaco Refining& Marketing, Inc. <br /> Environment, Health& Safety All <br /> 108 Cutting Boulevak d . <br /> Richmond, California 94804. <br /> Re.- "'vapor Extraction Well Abandonment <br /> former Texaco Service Station 61-857-1.030 , <br /> 305';South Hutchins Avenue <br />' Lodi, California <br /> Dear 1VIi:Zielinsk <br /> This letter;prepared by Pacific Environmental*Croup, Inc. (PACIFIC:) on behalf of <br /> Texaco Refining arketing, Inc.(T-exaco), documents!the completion of well.. <br /> abandonmernt activitt4.4t the site referenced above (F gore 1, GEOCON), Six wd is were <br /> abandoned from Aug..ust: i S through 27,,1997, 11e work performed was Outlined in <br /> 1'ACIFIC's Work Plan for Weal Abandonment, dated 11100 274.1997, and was approved:by <br /> � H <br /> Michael Infurna of S rxJoaquiix County Public Health Set-1ces; Environmental Health. <br /> Division,as stated ori!the wellaliplication and permit forth,dated June 27; 1.997:: <br /> II <br /> Vapor extraction wel s VW-1, and 'VW-3 through VW-6'were drilled out below the total <br /> depth of each well an grouted from the bcattom Lip wnth'neat cement to grade, in <br /> accordance with Butt in 74-90, California Well Standards, California Department of <br /> Water Reseiueces,June 1991, Wells VW-2 and VW-3 were installed in angle borings: <br /> t <br /> approximately 70 feet long (approximately 56 feet below ground surface [legs]). <br /> In Well VW-2 the vv 1 casing vas drilled out to approximately 20 €e....as ift icated by. <br /> well debris eam%ng up with the cuttings. Beyond 20 feet, well debris`was riot noted in the <br /> cuttings. Drilling was continued to approximately 45 feet in an attempt to destroy as <br /> much oftlxe annu us :f Well VW.. as possible. At approximately 45 feet bgs, the driller <br /> indicated that the au g' r had drifted off the well and drill og was.iscontinued at that <br /> depth. Approximatel. 30%to.320 gallons of neat cenxent was used to:backf l <br /> Well VW4.: This:arriIl`ount is approximately the same atlIOLInt required to backfill <br /> Wet;! VW-' which.yvas ccttxtpletely.dirilled ut to 70 (eet 1 Based botluon the c>rigiixal <br /> cotxstruction detail, which indrivates drat the top of"the filter pack iwas ai 19-112 feet,,and <br /> a{ <br /> il... Ij <br /> 1:13115 Sunrise Cold Arte.,5UidL.m, Rti th c.6ed6va..Califami�r;:r357�2 (:9:1(x} i-�;St3: N (9.16)85E3-235.5 <br /> tt ii <br /> �j, <br />