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California Regional Water Quality Control Board <br /> (\- Central Valley Region <br /> v Katherine Hart, Chair <br /> Linda S. Adams 1.1020 Sun Center Drive#200, Rancho Cordova,California 95670-6114 Edmund G.Brown Jr <br /> Acting Secretary for <br /> Environmental (916)464-3291 •FAX(916)464-4645 Governor <br /> Protection http://w .waterboards.ca.gov/centralvalley RECEIVE <br /> 22 February 2011 <br /> FEB 2 3 2011 <br /> Mr. Steve Osborn 1 ENVIRONMENTAL HEALTH <br /> Kinder Morgan Energy Partners 1 PERMIT/SERVICES <br /> 1100 Town & Country Road <br /> Orange, CA 92868 <br /> COMBINED SEMIANNUAL AND ANNUAL 2010 GROUNDWATER MONITORING <br /> REPORT, KINDER MORGAN ENERGY PARTNERS, L.P, 2947 NAVY DRIVE, <br /> STOCKTON, SAN JOAQUIN COUNTY <br /> Staff of the Regional Water Quality Control Board, Central Valley Region (Central <br /> Valley Water Board) reviewed the 27 January 2011 Combined Semiannual and Annual <br /> 2010 Groundwater Monitoring Report (Annual Report) submitted by ARCADIS U.S., Inc <br /> (Arcadis) on behalf of SFPP, L.P., operating partnership of Kinder Morgan Energy <br /> Partners (KMEP) for the KMEP terminal at 2947 Navy Drive in Stockton (Site). <br /> Groundwater monitoring at the Site is conducted pursuant to Monitoring and Reporting <br /> Program (MRP) No. R5-2005-0815. <br /> Groundwater bearing zones underlying the Site are divided into four progressively <br /> deeper units designated as the A, B, C, and D zones. KMEP conducts semi-annual <br /> groundwater monitoring in nine wells (SP/M-1 and SP/M-3 through SP/M-10). SP/M-7 <br /> and SP/M-8 are B zone wells with total depths of 45 and 37 feet below ground surface <br /> (bgs) respectively. The remaining seven wells are A zone wells with depths that range <br /> from 18 to 29 feet bgs. During November 2010, depths to groundwater ranged from <br /> about five to seven feet bgs. Groundwater in the A zone flowed toward the east at a <br /> gradient of about 0.001 feet per foot. <br /> Groundwater sampling summarized in the Annual Report shows that non-aqueous <br /> phase hydrocarbons (NAPH) have been absent from on-site monitoring wells since <br /> 1996. Since 2003, the highest concentrations of contaminants of concern (CDCs) have <br /> been detected in SP/M-9 and SP/M-10 and are summarized on Tables 2 and 3. During <br /> the fourth quarter of 2010, SP/M-10 contained the highest concentrations of COCs with <br /> total petroleum hydrocarbons as gasoline (TPHg) and TPH as diesel (TPHd) at <br /> 64,000 micrograms per liter (Ng/L) and 2,200 pg/L, respectively. SP/M-10 also <br /> contained benzene, toluene, ethylbenzene, and xylenes (BTEX) at 15,000 pg/L, <br /> 1,100 pg/L, 440 pg/L, and 1,010 pg/L, respectively. The highest concentrations of <br /> methyl tertiary butyl ether (MTBE) and tertiary butyl alcohol (TBA) were detected in <br /> SP/M-9 at 970 pg/L and 33,000 pg/L, respectively. The SP/M-9 concentrations for <br /> TPHg, benzene, and MTBE tabulated in Table 2 indicate a decreasing trend. <br /> ' California Environmental Protection Agency <br /> p�aRecycled Paper <br />