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<br /> ;.Q. INTRODUCTION AND TSCOPEOFJ['WORK,`
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<br /> tof emf.;-PeterWallace'property�Lowner,'Advanced GeciEhvi�6_ 6ial, Inc: 's
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<br /> ,t 'QUitriett aid'i t t
<br /> .;prepared' his. Report.detailing: field activities'IIY�m. at 348'!-VVcsi Harding Way, S'o'c
<br /> California
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<br /> (tbe'§ite) duijngjtC,tl�ii&quarter,of,
<br /> f.five 0 r.i
<br /> f work -site WbIls,in September'J C PC o.. W. . I moni oring and arnpling .�ndl6ff
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<br /> 09:,Th6'�i te"sektinig" i's'i ustrated in.Figikei 1:iTheJocations o, structuresand monitoh4,wells,on..jff
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<br /> 2.0'.- -,!' .PROCEDURE
<br /> '!�,'Field �ktivifies at tli6 sifte' w''cire perfortned -ifi 'accordance with guidelines for--the subsurface
<br /> n. un&r&ound stor'a�e tank (UST) s c eeritfal Valley,R'e'gional,
<br /> lhvestigatio pf ' it 's'&stablish&d'by.the'
<br /> �Vai'er O'uality Control Board t(CVRW' Q'CB)and by the Safi Joa'q'u rit-o"unty Public Health'Services:-'
<br />:'• nvironmen a] -D).
<br /> t Healt.h'Di.Visivo'n (PHS-EH
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<br /> -1 -MONITORING WELL-PURGE PROCEDURES. ;y
<br /> 'On,02 September 99,a water level meter-was used,to measure the depih to ground water in
<br /> well c rb ati�,e"'.to`the iops.of the well The relative gr'ouhd water,el6vatidn'iri each'w 11
<br /> and hydraulic gradient were determin' cdfirom* .th6sC.data(Table:i),
<br /> After' ,'i'
<br /> water depths were rneasurekd 'r"e-cleai�&d., two-stage sijbih6sibl6'.
<br /> ground
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<br /> pump was used,to
<br /> ''evac'uate waterjn-Ve11s.-MWA MW-2"PMW--3R, MW-4'and,MW-5..-Wells-MW:..l and. MW'2.
<br /> required'the' purn�:to be low e� red deeper:into tfie:)�6i 1'casinj durin 'purgin,,gand-we�e,ob's'erv'cdto''I :,�;��-, .9
<br /> F.,Pioduc produce-less water Per,niihiltel:than the'other 6�ells..
<br /> 'During the,Septeinbei-sampling event, a'p'pr6'xim`at&ly 1-5.g4llons"of.w'at6r'(a,'r�iiiin'iulm ofi,Ared:well 7,
<br /> -ature,,OH an&bonductivif�Wi6re'n�'e'a' at 3
<br /> each-well t.6y�p6r slu ri e-d I.
<br /> ill ;
<br /> �%i, iofi int6rva s,using.a- ur e er-,ka re
<br /> gallon I . . Hyddc water aii�jy�c�. P" g"d'"t s'sto din 55. gallon DOT I approved I
<br /> Appendix A.
<br /> site 1� oru 0
<br /> di s on .,M' t stabilization data and,.field dat4 sheets are included in A�
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