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<br /> Geological Audit Services, Inc.
<br /> Environmental Professionals
<br /> v
<br /> 1803 March Lane, Suite A•Stockton, CA 95207-6414•(209)95g 0it`w.FaX2t �195f.Qfl0
<br /> Ncnieniber t, 1994
<br /> SC-93-09-792-03
<br /> Mr. Steve Sasson
<br /> San Joaquin County PHS/EHD
<br /> P. 0. Box 388
<br /> Stockton, CA 95201
<br /> Subject: Stockpiled Sall Rean-ed-3rt.ien
<br /> Caldron's i imam'; Oda:..e
<br /> 1A257West Byron
<br /> on RE4wr', Tra;✓}•y, California
<br /> Dear Mr. Sasson:
<br /> In accordance vi-Ith the requIest of o)ili Client, Ptl . AifTf d ('Iiah..Ton, Geological A- dit Servi ;'s,
<br /> It' . 5 �' por `?= E. ha -pprCi �r ? Gblerrj{ Carb m
<br /> impacted soil currently stockpiled at 11.255 V'Ve st. Byr;:)r, lKoad.
<br /> From November 30 to Decr.-tr be-T r, 199'1, approxim.n-telly 12-5 cubic yards of soill were
<br /> excavated Pram the location of the 3o *Stc:r a;rrc-gym :irc1 storage tank (L15'['} at 1�'�t:i West
<br /> Byron Road in Tracy, California, (icThe soil. was divisted into three stockpile-, iuidi
<br /> r,,sd or ;Mastic sheeting. Stockpile : Yl '.s4as later sey nat:ed into =t�:�ckpi'es SP11. i::r� l �,t�4
<br /> pla
<br /> An ii;itial set of samples were c(A ectyof the s 0c_kr?ile:s in December 1993.
<br /> On May 17. 1994, the soil w;.s U).ocul ted NNith a l lacteria medium. V vrc knote: tl:,k::
<br /> d--gradatiom of etroleum by d-r'-uC:n-h, '._.. u,,., ..�
<br /> : v s.- •- 1. t.�1_. �L:fZ _ ig..o.n i'
<br /> �,.b_ �� �../ -:iaa_..• ii.4..�.. .:a; i ,.p ,_�`i �,,. i:.:° i: S.r� itiv<'.:iti�.ei, s�ii-i �
<br /> sprayed over the sail piles. After itl�iculart«11 as cn,� ,�l.cxc:c=, the piles :ve;e ,cep,>rrc}. a;�i�t'r:
<br /> plastic sheeting.
<br /> Bioremediation progress was moniic�red �, collecting _,coir sa rple..5 fiom t12s inoca>Ilatecl. so, 1,
<br /> Three sets of confirmatory samples were collected fromi the treated sail. No petrolei:rn
<br /> hydrocarbons were detected in stock-pih,,s 511.3 aad Sp4 during the first and second
<br /> samplings, and this soil was subsecivoUtiy sOUITIe(i i0 However, petroleatrr
<br /> hydrocarbons wire defected in sam*plei: e)-.fr1 soi.I p lcs yi'-1 and SP-'<'_Jr>;st above. the nie thod
<br /> detection limit (MDL) of 1.t� part l+erjrir�I:Rbt. p'—pI i J -4- each cf t:b.e Iinr,: 0nfirn fiat ry
<br /> samplings. 'l ha; analytical re.3d;:t_, of thc; sol sain,.lk-s sihi :rnarized n 'fable 1.
<br /> a..[.SW n.&U,.i.,ice:
<br /> CAL=GILLMW2-SAa 94
<br /> Full Spectrum Environmental Services• Hydrogeology
<br />
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