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B R 0 W N b',- L, ± E L HEM-,31 <br /> i �( r sal€�;E <br /> CALDWELt�L�� i <br /> . <br /> n Y 17 AN 10' 4 6 <br /> November 16 , 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 Third Quarter 1995 Groundwater Monitoring Report <br /> Kent's Oil Facility, Stockton,California <br /> Dear Mr Fratto <br /> This report presents results of water-level measurements and groundwater sampling performed <br /> during the third quarter of 1995 at Kent's Oil Facility located at 3310 E Miner Street, Stockton, <br /> California The work was performed on August 31, 1995, by Brown and Caldwell <br /> There are three on-site wells MWA, MW-2, and MW-3 Well locations are shown on <br /> Figure 1 Water-Ievel measurements and groundwater samples were collected from all three <br /> wells during the third 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 (WH-MO), by EPA Method 5030/8015 Modified <br /> Results <br /> The groundwater flow direction on August 31, 1995 was to the south under a hydraulic gradient <br /> of 0 035 and is shown on Figure I The hydraulic gradient increased during the second quarter <br /> of 1995 and remains moderately steep The change in the gradient value is probably due to the <br /> This report was prepared in accordance with the standards of the environmental consulting industry at the time a 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 /> Environmental Engineering And Consulting Aralybcal5ery ces 142MEPORTS\95QTR RPMRD95QTR DOC <br /> 9616 \11{Rp1, AIENLE $LITE 600 SACROIENTO CA 9)827 2627 <br /> 1916) 444 012.) Fat (9t6) 8)6 )277 <br />