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M) n <br /> ID illi [nl <br /> .,AN' 2 3 COOK <br /> Ms Vicki McCartney ENVIRONMENT HEALTH <br /> January 23, 2006 PERMIT/SERVICES <br /> Page 2 � <br /> A summary of total petroleum hydrocarbons as diesel (TPHd), as motor oil (TPHmo), and <br /> as gasoline (TPHg), benzene, and methyl tertiary butyl ether (MtBE) laboratory analytical <br /> data is presented In the table below Please note that Gettler-Ryan reports the data In parts <br /> per billion (ppb) while Lancaster Laboratories reports the data In micrograms per liter , <br /> �,rglL} <br /> Number of Detections Minimum Maximum <br /> Constituents above the MDL of the 3 Concentration mIL <br /> Total Samples N9 (Well ID) Concentration in pglL(Well ID) <br /> TPHd* 3 951<50(MW-1) 1,30011,100(MW-3) <br /> TPHmo 3 250(MW-2) 600(MW-3) <br /> TPHg 2 <50 7,200(MW-3) <br /> Benzene 1 <0 5 1,200(MW-3) <br /> MtBE 3 11 (MW-3) 1 700(MW-2) <br /> Explanation <br /> MDL = Method detection limit <br /> pg/L = Micrograms per liter <br /> • ND=Non detect <br /> i <br /> Note <br /> *indicates samples where analyses were run before and after silica gel cleanup(beforelafter) <br /> M <br /> If you have any questions or concerns regarding these activities, please feel free to contact ` <br /> Stephanie Furgal at (559) 271-2650, ext 234 <br /> �E <br /> Sincerely X, <br /> Sid <br /> SEGO Int nationallncorpo ed <br /> Stephanie Fu a[ <br /> Project Manager <br /> z <br /> Attachments <br /> Attachment A December 15, 2005 Groundwater Monitoring & Sampling <br /> Report by Gettfer- Ryan Incorporated <br /> c� <br /> cc Darin Rouse, Chevron Environmental Management Company, San Ramon, CA �y <br /> Jim Barton, Regional Water Quality Control Board-CVR, Rancho Cordova, CA <br /> N IFileslProtectslChevronlRetaill#9-20331Penodic Mon itonng1200514QMR0514Q2005 QMR 92033 doc <br />