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<br /> ;'I I; ' Quarterly Report November 1999 I '
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<br /> r I WELDON CHURCH PROPERTY`
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<br /> 104 West BeverlyTlace
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<br /> r{ �' I ..,I!Ira- 11I1141 ,� ,4 'i'1 h 1• {: Tracy, Callforrud - •:I , ,'r , i. -r!,4 [ L �' t{'� I o��iz t7
<br /> 0 r : INTRODUCTION
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<br /> At the!request ofrMr. Weldon Church Advanced GeoEnvironmental Inc "(AGE)'has re ared this
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<br /> :Quarterly.Report for the site at 104•:WestBeverly,Place, Tracy, Californlai(the site) The scope of
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<br /> iwork`:included monitoring and sampling.seven'wells, obtaihing,laboratory analyses ofahe samples '. a {4;
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<br /> ;and preparation of this report.,Tire'site setting is illustrated`on{Figure 1:`Locations of'structures, ;) '
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<br /> borings and,monitonng wells related to the site are illustratedS on Figure,2 { w I+
<br /> Site.history:alid findings from previous invcstigations and previous momto r
<br /> k nng,everits at'the site are' ;,: '!+�''�� '•
<br /> �+s''detailed in the,Prelbr iinary-Inves'tigation and Evaluation,!Report 'September 1996 (PIER) prepared I.
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<br /> 2`0. PROCEDURES,, I i`:'
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<br /> The ''Work','was, performed m accordance'with;San Joaquin County Public Health Services
<br /> Environmental Health 1-Division.'(PHS-EHD),and Central Valley. Regional Water Qualdy Control° '
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<br /> ` Board gu'delines�for investigation'ofundergrqui nd storage tank (UST} 'sites.,
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<br /> 2!1 MONITORING WELL PURGE PROCEDURES-;'
<br /> 14
<br /> '•On 24 Novernber. 1999�:a Solinst water level meter'was used to measure.•the.depth.to ground water
<br /> t it '!in each well relative to the 'to ps of the well casing¢s' After ound�water depth measurements were ;
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<br /> each monitoring well,was'.purged using a two-stage,isubmersible pump aApproxlmate.ly 3' I ,
<br /> ..!,t.o S Rgallons of water.''ere .eVv cu'ated &om,.each inohit6iinn wellh1!`a mxnmiumothr`ee well;casin ;
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<br /> s { :volurnes), as appropriate for each well
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<br /> i 1 Tem reratiare, Hand conductivit 'were measured at I=gallon:.or2=gallon intervals, as'approprlate;
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<br /> A. "''using a Ilydac water analyzerto monitor,stabilization ofthese ground water parameters. Field data I
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<br /> °logs.are'included in Appendix,A Purged water was`temporarily stored on-site in155-ga116nj drums.
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<br /> a 2 2 COLLECTION�AND AN
<br /> OF GROUND,WATER SAMPLES r3 F
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<br /> .n Water.sani�rles�werec0'ft t&d 6&iii';'eacfi'monitorin well usiri• Inew'dis 'osableibailers after allowing {!'''' '
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<br /> ` } the wells to-achieve a mihimum'80% recovery of the pre'purge water:volume. The-samples were
<br /> {: transferred :Into ''40 ml':•:EPA-approved vials co'intaining :0 5 ml';�1$% hydrochloric ,acid"ass a.S,I;i, i 'ILIAH!
<br /> preservative Thesample vials'were'then labeled with the monitoring Well.designation, date"t
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<br /> cif,s"ariip`lirig and the sampler s initials The samples were transported in a chilled container under
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