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NOTES: <br /> 1 When more than one detection was made within the contoured interval,the detected concentrations were added together• s,and an average concentration was calculated. If the analytical results of one of the samples analyzed within the contoured o1� rbn N <br /> interval was non detect,one half of the detection limit was added to the detected concentrations in the other samples and c <br /> an average concentration was computed for the contoured interval, 'JIeI„ <br /> 2 If(ND)or positive number(i.e.16)appears next to a boring or a well,a portion of the interval from 5.5 to 10.5 feet bgs was o <br /> avj <br /> sampled and tested. If no notation appears,no analysis was performed for that interval. The detection limits for the various r" nth <br /> Volatile Organic Chemicals range from 1.0 to 1,500. %-v Str�01 <br /> 3 Volatile Organic Compounds(VOCs)were analyzed by one of the following methods: EPA Method 8010 using Gas Shwa+ o��rp�ss <br /> Chromatograph0..y(GC)/Electron Capture Detector ECD), EPA Method 8020 using GC/Photo Ionization Detector(PID). <br /> or EPA Method 8240 using GC/Mass Spectrometer(MS) ,:..,..- <br /> • •TY817 <br /> ' Pump LocationAll <br /> \ . <br /> —_ •TY810 (ND)is <br /> 'IY815 (ND) i � <br /> AIC Paved Parking Area - (ND) <br /> • Station 1-louse 1 <br /> _.- <br /> -- --A-----+ - <br /> �--�— +- <br /> • .,_ • <br /> -+--+--.-# -+ + ---- ----+— ---�-+- -� 14--i---- I I I Tyl <br /> A/C <br /> ._ 11 A/C Paved Road TYB29 _ •(ND) A/C Paved Road <br /> � � � A <br /> LVW-148 •°.�.: � <br /> (Sto�clkppil <br /> � 2 TYB4TYB10 .; !` : (ND)(ND) �S� TY82 B27•v _� TY89 ♦ TY <br /> YN3D1 • TY830`0 Is n6.v '- TY83)_ .: •TYB1 <br /> e (ND)• (ND) •{1� <br /> ne 5 <br /> \ MW 12B �) Ak- <br /> 4 TY�i4l <br /> :i <br /> TYB5 � • + .•/''/••` -EGEND(365) � { )1 <br /> { 41(ND)ND <br /> Communications 10 TY823 <br /> / <br /> Facility I ,' 4F N�-1) TYB3a X%�` /•{ND) � A-Zone Monitoring Well Location <br /> i . (23) <br /> TPCAPond ` =g'1r —+ ••/ MW3B� B-Zone Monitorin Well Location <br /> ._;- 1 �- •TYB22 /../ g <br /> Excavation , - ND <br /> I -- -_,--��{ ) Mw-1c C-Zone Monitoring Well Location <br /> (5) • Denotes Chemical Concentration Detected <br /> (ND). �•• <br /> s•,/••� \ (ND) • Above the Method Don Not Detction ected <br /> s sal (ied ! �% /../•• CONTOUR Analytical Method Detection Limits Range <br /> _- �,� INTERVAL• (µg/kg) <br /> '' f <br /> ------- from 1.0 to 1500 Micrograms per Kilogram. <br /> 10 <br /> ,jStoccckk ilea Building <br /> ,I'•/ --50—� C� <br /> / I 11 � �• Road or Paved Area <br /> ---i oa-1 —••�••� SPTCo Property Boundary <br /> �• ��� — Existing Fence <br /> +------- Railroad Tracks <br /> 4 / Limits of Impoundment Excavation <br /> Approximate Scale in Feet --r---- <br /> W.S.I.D. Irrigation Canal (Buried) <br /> ' 0 120 <br /> Fgure <br /> Industrial Compliance ISOCONCENTRATION MAP 4-4 <br /> TOTAL VOLATILE ORGANIC COMPOUNDS <br /> r A Subsmen olio y stemsf SP IN SOIL AT 5.5 - 10.5 FEET BGS ��"° <br /> 1 l Environmenral Systems,Inc <br /> a oar SOUTHERN PACIFIC TRANSPORTATION COMPANY <br /> Project Ne: 05100254 03/09/94 TRACY YARD <br /> Scale: <br /> I Drawn Lynn Fischbeck Checked <br /> ecked Mike Purcell TFACY, CALIFORNIA a5 dawn <br /> Trcy254/RIF0294rFig 4-4/tt102.rev c <br />