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,."..�.. =�... �----� :vs^„a :.:� � �5s '�,^c:.`��.. .a ^mss. ���-�•� �r"�'=-� = "1�#� - .a "-;� � _ � - .R ��....a��-,r- s .�€:�'�' <br /> r <br /> 11ItocFI) %J firs <br /> Hathaslokogirria and C=t)nventionn <br /> (NiNVIIAl. PRACTICES WITHIN A MULT1111.1; AGRNCY llll;Itt RCItY <br /> C,5, Environmontnl 11rot£ction Agoncy atnntlnrdm oorVh on lfao- feaitt)dntirair for <br /> nit field anmpling opera+tlonn prrformrd lay, our firm. 'Ilse. MIA SW H16 it., the <br /> primary publication from which procedureo ore derivrd, thmigh there are <br /> odditionnl EPA twurcca such on training films and ve_r6ril t 0nir.tu)ticnttond. <br /> Sosmpling relnted to undorgro-utid aitaarag- tntsks and tank rnlhted thrrats to <br /> groondwatrr are governed by the California Writer RrtLourCnsi Cnntrol Buttal and <br /> their liegiunal Wi.►trr Quality Control hoarda. l hila a®ane ash=,ts Of flold <br /> and lasborntory wnrk msy btx detogtttcd to the Californin Depnrtment of lleulth <br /> Survir,es. tho Cit'RCD and the nine Regional Water Quality C(ir}:rol I',onrds <br /> extaybliath tht. genernt and opecific criteria for ttimpling pvriortnad in <br /> connection with underground at*rago Utokn. Thin i® demo through the <br /> publicattion c}f guidance documents, the itisunnco of rieinar:indrr and vtrbul <br /> arinniincrmrntia. <br /> 1 <br /> i)ther ngencira, wich as .lir Pollution Control Districts. rutty° require <br /> additional samples, but thane are usually irl ftI4jt_J2B to Khmples required by <br /> tho RWQCB. IAcal Implementing agrnr.y (LIA) inspector.. etre frequently prertent <br /> '^ during the tank ramoval phaaa of it project and either direct or request that <br /> - "niplas be taken according to RWQCII apecificrations. Addltiomal sample-5 may, <br /> and frequently art%, taken at tho refs,imit of the LIA innpectov. <br /> 11tined on field conditions directly ctbaery»bta by the LIAiata:pectctr, vete <br /> field peroonnel may be asked to Boll-mt unmples that are tailored to the <br /> specific situntion find which the inspector ,judges will Provide., aubrttaantial <br /> inror mttlon nbtnst the ail". Quite often lhea" dirtetinnx or �st;,gc*tions <br /> raitac"ide with the unmpling areas established by the RUQC1I na the proper <br /> collection points for s amplas which will be used on the Primary Criteria for <br /> pr <br /> a+ ftagttlatory Agency Datermination on whether odditional explorr,trttn or <br /> rasnedisa;tion will be required at n patrticulrir site. Similarly, there ar+- <br /> instances when the LIA inaapector's ,j%idgements do not coincide with Board <br /> tipecificatirtnra. <br /> Tsar) r.fmmon examples of this are tilt followot <br /> 1. A local implemonting a5genr:y inaptctor notes that soil dug up from the <br /> corr"A R QCII interface sampling puttt is rotatively clean, but obaervex that <br /> Mere In quita obviously contaminntrat t�nckfill underlying t1m.. center of the <br /> tank. Tho it-inv#retrr directs that the contnuiit,nted backfill %hould be taken <br /> —._—_-- login_tel_fir tls+ti_Citrin_..In.l_erfticar•_sgil_at.+. azn_t.o- picividr_ nfurtration isbou. _thr_—_-- <br /> "wortit thpw-" c:rinditionir within the taint: pit. ---- ---- --------� - <br /> t. T1s.+ troll tit inti• opecif od iirterfarr, sttmplittg sic pth iii found to be slightly <br /> a untn±airvilrtl, taut much less so their: the Moil only 9 few inches above. Noting <br /> �..rt <br /> Sampling lfap')rt 1=37-C-1 Chavron 191H s1'C°I 014 TWtylt*ge 7 <br />