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EOYIRC G.Bnow+Jn. <br /> Rowa.0 <br /> Cd LireR•IA M^Ar iLO UE4 <br /> Water Boards <br /> Central Valley Regional Water Quality Control Board <br /> 3 April 2013 <br /> Fassel &Amal Elder Aman Business Enterprises, Inc. <br /> 4880 Peach Avenue 801 North Granda Drive, No. 14A <br /> Manteca, CA 95337 Madera, CA 93637 <br /> Harjit Songh, et al Satinder Singh Dilawri <br /> 1675 Paseo Laguna Seco Vancity Inc. <br /> Livermore, CA 94550 420 W. Yosemite Ave <br /> Manteca, CA 95337 <br /> DOCUMENT REVIEW, RAINWATER CAR WASH, 420 EAST YOSEMITE AVENUE, MANTECA, <br /> SAN JOAQUIN COUNTY(RB CASE#390835) <br /> 1 reviewed Groundwater Monitoring Report, First Quarter 2013 (Report) received 2 April 2013 from <br /> Fassel and Amal Elder's consultant Ami Adini &Associates, Inc. The Report provides the results of <br /> groundwater monitoring conducted on 8 March 2013. During the first quarter of 2013, depth to water <br /> varied from 15' bgs to 17' below ground surface (bgs). Groundwater flow direction has historically varied <br /> from northwest to the current east northeast(March 2013) direction. Maximum groundwater <br /> concentrations were total petroleum hydrocarbons as gasoline, 1,390 micrograms per Liter(ug/L); <br /> benzene, 3.3 ug/L; toluene, 9.8 ug/L; ethylbenzene, 151 ug/L; xylenes, 286 ug/L; methyl tert butyl ether <br /> (MTBE), 120 ug/L; tent butyl alcohol , 39.8 ug/L; and 1,2-dichloroethane, <0.5 ug/L. The Report <br /> recommends continued semi-annual groundwater monitoring, and installation of the additional offsite <br /> monitoring wells approved on 20 June 2012 for the offsite MTBE groundwater assessment. <br /> Offsite MTBE groundwater concentrations have declined significantly since the first quarter of 2012 <br /> (MTBE, 2,040 ug/L). Additionally, offsite access has not been granted for the new wells by the property <br /> owners. Therefore, in order to conserve remaining State funds and move the case towards site closure, <br /> you are directed to use the existing data to complete a fate and transport model (F&TM) showing the <br /> maximum extent of the MTBE groundwater plume, to determine whether downgradient sensitive <br /> receptors are threatened. The F&TM shall be included in the next groundwater monitoring report due <br /> 30 July 2013, and shall include a recommendation for site closure, if appropriate. If you have any <br /> questions, I may be reached by phone at (916) 464-4615 or by e-mail at�rton�waterboards.cagov. <br /> /s/original signed by <br /> James L.L. Barton, P.G. <br /> Engineering Geologist <br /> cc: Nuel Henderson, San Joaquin County Environmental Health Department, Stockton <br /> Gabriele Baader, Ami Adini &Associates, Inc., 4130 Cahuenga Blvd., Ste. 113, <br /> Los Angeles 91602 <br /> K�E.Latimer GGD.P.E.GR I PMOU O.CPO"=P.E.,BCSEE 0®OU11YR arna8l <br /> 11 fY2s Sun CfIR O.tv��2041YRNw Ca kM CAMI I xrrr.wabrCRRr6a.tw.pw/aaitrRlellg <br /> Q RM"LLC WOR <br />