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BC Brown and Caldwell <br /> 3480 Buskirk Avenue s i SERiJJC,E <br /> Pleasant Hill CA 94523-4342 11 1 <br /> P 0 Box 8045 <br /> Walnut Creek, CA 94596-1220 g 2 <br /> (510)937-9010 <br /> FAX(510)937-9026 <br /> January 13, 1995 <br /> Mr. Brian Cobb <br /> E-Z Serve Management Company <br /> 2550 N. Loop West, Suite 600 <br /> Houston, Texas 77292-2021 11-1565.04/1 <br /> Subject: Fourth Quarter Groundwater Monitoring Report <br /> Former E-Z Serve Station #100878, <br /> 1012 West Yosemite Avenue, Manteca, California <br /> Dear Mr. Cobb- <br /> Brown and Caldwell conducted the fourth quarter groundwater monitoring event at E-Z Serve <br /> Management Company's (E-Z Serve) Former Station #100878, 1012 West Yosemite Avenue, <br /> Manteca, California, on December 7 and 8, 1994. The work performed at the subject site <br /> included collecting depth-to-groundwater measurements from eight groundwater monitoring <br /> wells, purging and sampling eight wells, and submitting the groundwater samples to SPL Inc. <br /> (SPL), an analytical laboratory located in Houston, Texas and certified by the State of <br /> California Department of Toxic Substance Control for analysis of hazardous materials Field <br /> work was performed following the procedures outlined in Attachment A. <br /> Summary of Findings <br /> Depth-to-water measurements were collected using an oil-water interface probe. Free product <br /> was not identified in any of the monitoring wells. A minimum of three well volumes was <br /> purged from each of the monitoring wells prior to sampling, except for Well MW-3, which <br /> dried out during the purging process. Samples were collected from each of the monitonng <br /> wells, transferred to the appropnate sampling vials, and submitted to SPL under appropriate <br /> chain of custody. In addition, a duplicate sample was collected from Well MW-7 and a field <br /> blank was prepared prior to sampling Well MW-7. A trip blank was prepared by SPL and - <br /> accompanied the samples during shipping. SPL reported receiving the samples at a <br /> temperature of 3° Celsius. Samples were analyzed by SPL, Inc, for total petroleum I, <br /> hydrocarbons as gasoline (TPHg), benzene, toluene, ethylbenzene, and xylene isomers, <br /> following Environmental Protection Agency Methods 8015 modified and 8020. <br /> I I I' OlA3H91C\S.ite11769Q1'RLXRPI�1Q06181R1'Ei-39A4 WPS I I I I E` I I I I I I` I I I I I i � � I <br /> 11I I <br /> I HPLaerlli <br /> II I I I I III I I ` !I I EI <br /> II <br /> I I <br /> I r III I II I I <br /> III I I_ I� II I I I I I _ill II I { �EII` I _IIIA II [ I''III I II I.I, Illi' it 1� II If III! I `II FI I I ' {I l If Iii I <br />