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THE <br /> NAINMEN <br /> ITWINING <br /> tr Rsi, fl ENTAL f rEA1_TII <br /> J <br /> LABORATORIES INC . � � .� SFi� <br /> ANALYTICAL CHEMISTRY • ENVIRONMENTAL SERVICES f1i: t <br /> GEOTECHNICAL ENGINEERING • DRILLING SERVICES <br /> CONSTRUCTION INSPECTION & MATERIALS TESTING 94 NOV 2 R PM 1: <br /> 59 <br /> November 23, 1994 - TL 394-0074-01 <br /> Mr. John Fukumoto <br /> City of Stockton — Public Works Dept. <br /> 425 North El Dorado Street <br /> Stockton, California 95202 <br /> Re: October Groundwater Monitoring Results For the Van Buskirk Park Golf Course <br /> Maintenance Yard, 1740 Houston Avenue, Stockton, California. <br /> Dear Mr. Fukumoto: J <br /> Old'�7f l�� <br /> This letter summarizes groundwater monitoring results for October 1994 at the Van Buskirk Park <br /> Golf Course maintenance yard (site) (Drawing 1). The work outlined herein was performed by <br /> The Twining Laboratories, Inc. (Twining) in accordance with the scope of work presented in <br /> Twining's proposal dated September 15, 1994 (Twining, 1994). This work was performed under <br /> City of Stockton Purchase Order 064981 dated September 19, 1994. <br /> 1.0 PURPOSE AND SCOPE <br /> The purpose of this project was to monitor the local groundwater flow direction and the <br /> concentration of petroleum product constituents (PPCs) in groundwater. <br /> The following scope of work was conducted to achieve the stated purpose: <br /> • Depth to groundwater was measured in monitoring wells MW1, MW2, and MW3 <br /> (Drawing 2); <br /> A minimum of three well casing volumes were purged from each monitoring well prior <br /> to sampling; <br /> One groundwater sample was collected from each monitoring well; <br /> Three groundwater samples were analyzed for total petroleum hydrocarbons as gasoline <br /> (TPH—G), benzene, toluene, ethylbenzene, total xylenes (BTEX), and total petroleum <br /> hydrocarbons as diesel (TPH--D); and <br /> This letter was prepared documenting field activities and presenting a groundwater contour <br /> map and laboratory analytical results. <br /> CORPORATE OFFICE: MODESTO VISALIA BAKERSFIELD <br /> 2527 Fresno Street 4230 Kiernan Ave.Suite 105 2521 E.Valley Oaks Drive 3701 Pegasus Drive,Suite 124 <br /> Fresno,CA 93721 Modesto,CA 95356 Visalia,CA 93292 Bakersfield,CA 93308 <br /> (209)268-7021 •Fax 268-7126 (209)545.1050 (209)625-1712 (805)393-5088 <br /> Chemistry Fax 268-0740 Fax 545-1147 Fax 625-1714 Fax 39341643 <br />