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<br /> : r - '�6`�"2. ". .-yr 3 - ''YarY'' f5. '�~x'Y', __ C.. R 1�,. � �—YTn, 4f .`iRx•3 :'
<br /> thra relatively dense roll, tort ith_fii imp!eMenting ngnnry lonprr_tor docidett
<br /> not to hnvn thr.. intnrfar..r, nail nnmr.lod unci hna the b-mckhon dlt; deer,rwr to aer
<br /> It the con'tAmination dimlwnheo to ncrrptnblw leveirr: Thls exploration naves
<br /> the property owner the cont r;f running foci maples at that lor..ntlonr nein
<br /> rnnbles the Inaptctor to directly cel nerve the Condition of the deal>mr nail.
<br /> In both exomplen, differmnt tentorial is collectnd ifs lieu of a otnnrlf►rd FIWQCn
<br /> Interface unmple. Further, the mnterin) eollreurd In eubntnntially different
<br /> from what mould have been obtained by taking reprrrnentntive null nt the
<br /> Board apecifierl onmpling lemation. Noto that bath of thea, nomplan ward
<br /> taken at tho direction of the local implementing ngoncy inspector who +.ran
<br /> present at the nils and elr:cted to (select niternntivo sampling locations.
<br /> ?:oto too, that these alternative nomploo may provide more information about
<br /> the slit than standard Board itpocified sonmplea. However, ns the LAA elected
<br /> snmplas do not nceurntely reflert coil conditions at thrr sampling pointe
<br /> specified by the RWQCD, the decialon making procet s may be hampered.
<br /> Clearly threw io no advnntngc In limiting the trbility of the regulator in th'i
<br /> field to make prudent judgrmentr. Likerwlae, rcgulatory parsonnel and
<br /> connultasnts who will review th- reports without tecnefl. of having been
<br /> present at the site need to know that the anssples taken were not obtained nt
<br /> the standard locations. A simples resolotion to these situntionn in a brief
<br /> notation indicating thnt the im:.npling won elective rather than In accordance
<br /> with a standard Board specification, Thesca notaUnna appear In the third
<br /> column of the TABLE OF SAMPLING LOCATION'S ANI) ANALYTICAL RESULTS.
<br /> by referring to the notations in column three and four In the TABLE, any
<br /> party reviewing the report should be able to determine If nomething other
<br /> than board standard samples were obtained, and when vnriont sampling was
<br /> performed, clarify whether It was elected by the LIA Inspector, elected by
<br /> our field personnel, or the result of some physical condition at the site
<br /> l that made it impossible to obtain material from the correct a4mpling
<br /> location.
<br /> SAMPLING MRTIIODOLOGIBS USED ON THIS PROJECT
<br /> STANDARD RWQCil INTERFACE SAMPLE: The tank removal sampling followed the
<br /> •� standard protocol for obtaining interface samples. These samples fall Into
<br /> the category of samples which are known to be of p0mory concern to the
<br /> interested reVulatory agencies for determining if adaitional taction will be
<br /> required at a alto and the methodology has been closvty defined in State and
<br /> RWQCB publications, supplamentn, and presentations. These specify both the
<br /> arcoptable depth and lateral situation of sample collection pointe. In
<br /> accordance with these t ecificatlnns, sample collection is executed as cioxr
<br /> as possible to the center lines (longitudinal axis) or the tank and on a
<br /> vertical axis with the fill p;pe. A corresponding location is also found at
<br /> _the-opposite-end of-the-tank-whenever- atansiar3--interface afaasples sr lacing --- --- - -----
<br /> - --- collected.
<br /> { tirlafly, the method consists cf digging up native sail from directly below
<br /> !a fill�
<br /> the pipe and the corresponding opposite end of the tank and obtaining m
<br /> r
<br /> sampling Report SMS-C-2 CHEVRON 1918 lsngrt 8
<br /> x=.
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