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Tri-RCL,Ional RccoIII III err(I'at Ions Pate 12 of ='4 <br /> Appendix /\ <br /> Ezphmnlion for- TABLE, #2. M1; 1)\9U,�1 �'IiRIF1CA'TION ANALYSES <br /> I As other methodologies aredeveloped and accepted by the.USEPA and the DIAS. they may also'be used if <br /> the\ have equal or better perforrrancethan-die listed methods. <br /> For drinkin2 \nater.sources. USLPA and DHS_recommend that file 500 series amethods for volatile oi-Lanics he <br /> used in pretereace fo the 8000=wastewater series rhethods due.to lover detection .limits and superior <br /> laborator\ Q!\;! C. The 500 series currently comparable;fo Method 826013 is Method �;214.2. <br /> \ppioprial analyses are to be.u.sed for detection of leakua 2 tank contents. For example. there racy be <br /> multiple Fuels dispensed from the individualaank over its active 11fe.`=Re2ulat01`s must determine ifthe US] <br /> \was used for.multiple fuels. and require the appropriate anah ses. <br /> I. I oral Petroleum Hvdrocai-bons,as`2asohne 0-.111-1u) and diesel (TPI-Id) ranges (volatile,and exuactibie. .. <br /> respectively)are to be analyzed and characterizes) by GCiF.11) with a fused capillan column and prepared by <br /> EPA method 5050 (purge and trap) I`or`volatile hydrocarbons. of extracted by sonication usi.n(2 Method �i0 <br /> for extr-actible hydrocarbons. Fused capillary columns are.preferred to packed columns; a packed column. <br /> ma\ be used as a.",First cut" with dirty" samples oronce the hydrocarbons have been characterized and <br /> proper QA,'QC is followed. <br /> Silica Cl cleanup oI'TPHg and 4 P1id samples to renioye ��eathered h�drocarb9ns or breakdown products.is <br /> mov <br /> ni t acceptable.as these compounds reed may contribute to impairment of beneficial uses of\\,atet- <br /> ihrou�_h adverse caste and odor and/or toXieiay: 11-113101-al background compounds are suspected to be <br /> contributin 1 10 Ili TPI-f concentrations that are not associated \\ith.the pet role im.hydrocarhon release. <br /> comparison with saimples frohn background',locations'. out of the influence of the petroleum hydrocarbon <br /> release niar be used to itIS61": adiusting '1 PI-I concentrations. <br /> b. Tetraeth\1 lead analysis mai: be requested if the total Lead conce.nti:alion exceeds Mie naturally occun-in. (or <br /> background) concentration for lead. <br /> 7. Oil and Grease(O G) anal+psis naav be.requeste.d when heady sit 12ht,chain hydrocarbons are present. As <br /> of I .lanuar\ 2002. US :FPA requires 0 & G analysis by.EP.A Method 1664A. <br /> ). Practical Quantitation Lir»its (PQLs), also cal.led-Reporting Limit by many laboratories. are influenced by <br /> analytical method selection, matrix problems and labotafory'QA%QC procedures. The PQLs shall be equal to <br /> or lower than the detection limits (OCRs) for purposes of reporting-published.by DNS <br /> I;, ,, l,. t, 'sisd\\�. rchemisal Dl IZldii tit tex:htm) or the minimurn levels (Ills)published b\ <br /> the State Water Resources Control Board in Appen'dix_4 of thePolicv jorlinplememolloi7 ojTnaics Sumdw-(is <br /> fbl- lriln)rtl-Srn-><cC It'at�cs,"F_nch�st d.-13A.u�,, and Estuaries.gf Cvlijowtia _ <br /> which ever is.lower'. When such PQI_s are not achievable. all <br /> explanation must be submitted:on the laboratory data sheets. <br /> 9. PQI_ chain of custody and the sighed laboratory data sheets are to be submitted containing the laboratory's <br /> assessment of the condition of the,samples on receipt including temperature:suitable.coniainer type, air <br /> Nibbles preserival sent in VOA bottles. pioper preservation, appropriate holdino lime. etc. hhesheets rmust <br /> also include file dates sampled. submitted, p`iepared fol analysis. and anal\zed- <br />