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S IEC ® R <br /> I <br /> Harlin Knoll <br /> October 27, 2003 <br /> • <br /> Page 2 <br /> IJiI <br /> Number of Detections Minimum Maximum o <br /> Constituents above the MDL of the 10 Concentration in pg/L(Well ID) Concentration In pgtL(Weil ID) <br /> Total Samples <br /> TPHg 5 65(MW-1) 2,600 (Il I <br /> Benzene 2 16(MW-4D) 22(MW 2) <br /> MtBE 2 4(MW-3) 75(MW-4D) � 1H� <br /> TBA 0 ND ND <br /> Definitions Ii <br /> MDL=Method detection limit TPHg=Total petroleum hydrocarbons as gasoline r '° <br /> pg/L=Micrograms per liter MtBE=Methyl tertiary butyl ether <br /> r° <br /> ND =Constituent detected below the laboratory reporting limits <br /> Should you have any questions or concerns regarding these activities, please feel free to contact me <br /> at (916) 861-0400 extension 283 <br /> Sincerely, <br /> SECOR International Incorporated ��p <br /> } <br /> B W Jackson Jr e4 <br /> Staff Geologist hr <br /> apAtttip- <br /> Attachments <br /> achments � <br /> Attachment 1 Groundwater Monitoring & Sampling Report by Gettler-Ryan, Dated September 4, <br /> 2003 �6 <br /> cc Mr Robert J Cochran, Chevron Environmental Management Company, San Ramon,CA <br /> Mr Jim Barton, Regional Water Quality Control Board, Sacramento,CA <br /> Mr Richard Berger, Berger&Company,Turlock, CA a 5 <br /> i w , <br /> 11Chevron1932321Penodic Monitonng120031302003 oMR 93232 doc SECOR International Incorporated <br /> ,SII <br />