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GeoStrategies Inc <br /> I ,.Unocal Corporation <br /> u <br /> January.. 15,-..1993 . - - <br /> Page 2;. <br /> "Ground-water sarnples were collected .on November; 1.8, 1:992. Samples <br /> ,were analyzed for Total Petroleum' Hydrocarbons calculated. as, Gasoline <br /> :(TPH-Gasoline), ;according "to ,EPA Method $015. (Modified), for Benzene, <br /> Toluene,` Ethylbenzene*, Xylenes (BTEX)' according to EPA Method :8020, <br /> and .for Total Petroleum Hydrocarbons, calculated as Diesel .(TPH-Diesel) . <br /> according to ,EPA .Method- 8015 (Modified);' The` ground-water samples <br /> were analyzed by National .Environmental :Testing (NET) :Pacific, a <br /> California State-certified laboratory, ..located in � Santa: Rosa; California. <br /> .The• laboratory analytical: report and Chain-of-Custody-.form are included <br /> in Appendix ,B. . These ...data.: are summarized and included with. the <br /> historical . chemical analytical° data , p.resented-. in ?able .2. A chemical <br /> Groundwater- <br /> concentration: map, :for . benzene :is presented: on Plat�e.� 4.. Groundwater <br /> sampling "field `methods and 'procedures r are- included .'in,a previous GSI <br /> L' report: dated. July 10; . 1992.; <br /> If: you have; any questions,:-please. rail: <br /> - <br /> Geo Strategi Inc.. _by, <br /> v ' C - y <br /> i <br />{ Ellen C. Fostersmith <br /> j Geologist <br /> i �QROFESSIny9 , <br /> �Fy <br /> rn <br /> Q� QN <br /> Diane M'.,Lundquist; P.E. o -+ <br /> Senior Engineer.` NO. c46725 ; <br />+ C 46725` c1v►L <br /> t E.CF/DML/rmt - l�rF of GA`,Ea��� <br /> Plate 1 . Vicinity.Map. : <br /> Plate 1 - 'Site Plan <br /> Plate 3. Potentiometric Map; <br /> 'Plate -4. Benzene-°Concentration Map, <br /> i Appendix A: Field"Data Sheets. <br /> Appendix B: . Laboratory' Analytical; Report. and; .Chain=of-Custody Form <br /> r� <br /> QC Review <br /> 7.$4601-3 <br />