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B R 0 W N „ ,= r D; ,AL PPAI-Th, <br /> CALDW & 11,L � . <br /> 24 <br /> December 21, 1995 <br /> Mr Bob Fratto <br /> Operations Manager <br /> Sheldon Oil Company <br /> 2850 Cordelia Road, Suite 120 <br /> Fairfield, California 94585 017-1422-0114 <br /> Subject Fourth Quarter 1995 Groundwater Monitoring Report <br /> Kent's 021 Facility, Stockton, California <br /> Dear Mr Fratto <br /> This report presents results of water-level measurements and groundwater sampling performed <br /> during the fourth quarter of 1995 at Kent's Oil Facility located at 3310 E Miner Street, Stockton, <br /> California The work was performed on November 16, 1995, by Brown and Caldwell <br /> There are three on-site wells MW-1, MW-2, and MW-3 Well locations are shown on <br /> . Figure 1 Water-level measurements and groundwater samples were collected from all three <br /> wells during the fourth quarter sampling event <br /> Field and Analytical Methods <br /> Prior to commencing purging, static water levels and total depth were measured and a check for <br /> floating product was made in each well Prior to sampling, the wells were purged of a minimum <br /> of three well casing volumes using a submersible pump After purging, each well was sampled <br /> using a disposable bailer <br /> All groundwater samples were analyzed for benzene, toluene, ethylbenzene, and xylene isomers <br /> (BTEX) by U S Environmental Protection Agency (EPA) Method 602, total petroleum <br /> hydrocarbons as gasoline (TPH-G) by EPA Method 8015 Modified/Purge and Trap, diesel <br /> (TPH-D), and motor oil (TPH-MO), by EPA Method 5030/8015 Modified <br /> Results <br /> The groundwater flow direction on November 16, 1995 was to the south under a hydraulic <br /> gradient of 0 035 and is shown on Figure 1 The hydraulic gradient has been consistent since the <br /> second quarter of 1995 and remains moderately steep Depth to water increased an average of <br /> This report was prepared in accordance with the standards of the environmental consulting industry at the time it was <br /> prepared It should not be relied upon by parties other than those for whom it was prepared, and then only to the <br /> extent of the scope of work which was authorized This report does not guarantee that no additional environmental <br /> contamination beyond that described in this report exists at the site <br /> Ervironmentaf Engineering And Consulting AnafyficaiServices '42MEPORTS19SQ7R RM\4TH95Q-M DOC <br /> 9616 M i c R o N AtiE'sUE SL ITE 600 S A C R A M E N T 0 CA 9)8 2 7 2627 <br /> (9161 444 0123 FAx (916) 8)6 5277 <br />