ARCHIVED REPORTS XR0006989 - Laserfiche WebLink

Home Browse Search

4{ nn n 1{ Li Vmni i 4 ,oar _ Ill,] 15_ I I1rLL d14LrLLI (ILpth r_,:()undx< mLr samples 1'1LrL LOIILL ILd from LaLll nt IIP-'- and IIf1-3 usln(L, thL same. pl0LLdu1L Irl loth of ChLsL horin"s thL hNdropunLh sLreLn was Lxposed from appro,inaatLI" 27 tO 16 ILLI hgs allpromIll,1tLk _' to i l ILLI hrati and 1ppl OXI latLly 32 to )6 tLet ()nL g[olllldwaELr s<ImplL was .()IILL1L(l 111)[11 14LI1 A 111CSL thILL IMLINLIN I ILII nt t[IL,L IMLl'ais ulntamed a wet sdtN ,and \0 sial] samplL 'tial 1c.Lot.,ILd 11(1111 ,1pploX1mat h, _'8 io 17 ILLI bgs In I)P-7 and Irom apprommateIN 28 to 30 t'.Lt has HI i)I' 8 111 I ILl. 01 1kL0\LI_ ,[nd tiLld ohsLrrations 1ndILatLd that the soli In those IntLryals plohabl\ h Id I(1w LAIL-s1011 111d w.:s plobah[\ a rLlaWYLIN Loar,L ,and HIL tipper sample Interval in HP-2 and HP-, (72 1() 16 ILLt hats) houndLd h), .l sandy Llay ahokL and a silty Llay hLlllw II1L naldd[L sanlplL [ntLr\al ( to 31 ICLt h's) �%as h()nn(iLd h� .a s[ltN LIWI ahm L and a sandN LIa\ hLION 1 hL bo torn ,ainpIL IntLr\al ( 12 to 36 ILLt bgs) was o\Lrlaln by a ,and,, claN Ills ti1l11ulpl0hL sampling devICL was deployed at two depths In SP-1 to attempt LolleLturn of d:sLrcet s[multam,ous soil and groundwater ,arnplLs (,IoundwatLr sample collLct[on was attempted at approximately 16 5 and 25 5 feet hgs the �Ilnulpmbe was un,ucccssful 111 collecting any groundwater Samples I ach �_1100ndwatLr sample was Lollected by gently tilling the appropriate laboratory ,upphLd containers dlreLtl\ from thL badLr 111 groundwater sample containers were sLa1Ld labc[ed, and placed In a cooler LI111[Ld with ILL for deli' er\ under Lhaln-of-custody procedures to (]LoAnalytical Laboratories Inc of Modesto ( alitotn[a fn: analvses 3 3 I AI3()RA I ORY ANAI.YSFS 1 he soil and P-loundwatLI samples collected irom the borings and monitor wells were analyzed for B I LX and sLleLted gasoline oxygenates/additives by I PA Method 9260B T PIf-G by I PA 'Method 503()/I 111 f and methanol by I PA Method 8015M I11L selected oxygLnates/additives Included MTI3I Lthanol, tertiary-I3utanol D1-Isopropy I f thL1 (D[PL) l.thyl tertiary-Butyl Ftlner (f;IBL), tertiary-Amyl 'Methyl I thL1 ( [ AMF) I thvlene dlbrornldL (FDB), and 12-D[chlorocthane ( 12-DCA) 4 INVFSTI(.ATION RESULTS HIL ILsults of ihL tion and groundwater ln�cstrgat[on rnLludLd Bold observations Iphototonlzatron detecto[ (PID) sasnpie sLIcening results detection of sample odors, and visual observations of site gLology I and soil and groundwater sample laboratory analytical results I aboratory analytrLal reports and chain-of-custod) IeLords for the samples are included in Appendix D 41 FIELD OBSERVATIONS Feld obsuvatlolls included PID ureL[nrng Itsults, detection of sample odors, and visual observations of the site geology I veld observations are Included on the geologic logs prepared for all of the borings (Appendix ( ) Iland-auger and dlreLt push borings DP-1 and DP-2 were advanced to approximately 1 I feet bgs hand-auger and direct push boring DP-5 was advanced to approximately 16 feet bgs [land- auger and dlaect push borings DP-6 and DP-8 were advanced to approximately 32 feet bgs Direct push borings DP-3 DP- t DP-7 and IIP-I through HP-3 were advanced to approximately 31, 12 36 25, 36 and 36 feet bgs respeLtively Hand-auger boring DP-9 was advancLd to approximately 8 feet bgs 51mu[piobe bol Ing 5P-I was ad,anced to approximately 25 5 feet bgs t� CONDOR