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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> 3443 Routier Road, Suite A , <br /> Sacramento, CA 95827-3098 - 11 . <br /> PHONE: (916) 255-3000 <br /> FAX: (916) 255-3015 , <br /> " 3 f F?i 2.' 32. <br /> 28 March 1994 <br /> Mr. Pat Hughes <br /> Chevron Research and Technology Co. <br /> P. O. Box 4054 <br /> Richmond, CA 94804-0054 <br /> CHEVRON PIPE LINE COMPANY, SPLIT SAMPLE RESULTS, ALDEN PARK SITE, <br /> TRACY, SAN JOAQUIN COUNTY <br /> Enclosed are laboratory results from split samples I collected from monitoring wells MW-09 and <br /> MW-13 on 19 January 1994, at the above-referenced site. Our in-house certified laboratory <br /> analyzed samples from both wells using EPA Methods 601 and 602. FGL Environmental, a state <br /> contract lab, analyzed samples from both wells using EPA Method 418.1 for total recoverable <br /> petroleum hydrocarbons (TRPH), and EPA Method 8015M for total petroleum hydrocarbons as <br /> diesel (TPH-D). Anlab, another state contract lab, analyzed samples from both wells using EPA <br /> Method 625/8270 for semi-volatile organics. MW-09 had only a low concentration of naphthalene <br /> (0.5 ppb), while all other compounds were not detected. <br /> As we discussed in our phone conversation 28 March 1994 please send us all of your laboratory <br /> results from this last round of sampling by 14 April 1994 and we will discuss lab results and <br /> proposed site plans at our meeting scheduled for 21 April 1994. <br /> If you have any questions, please call me at (916) 255-3054. <br /> cl&Z4 <br /> DAVID E. JENKINS <br /> Associate Engineering Geologist <br /> DEJ:dej/ldj <br /> Enclosure <br /> cc: Ms. Megan Cambridge, Department of Toxic Substances Control, Region 1, Sacramento <br /> Ms. Margaret Lagorio, San Joaquin Public Health Services, Stockton <br /> Mr. Bill Vizza, Director, Department of Public Works, Tracy <br /> Ms. Susan A. Robinson, Chevron Pipe Line Company, San Ramon <br />