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11/09/98 MON 1.2:32 FAX 1 415 382 1856 nn. • <br /> ERI ENVIRONMENTAL RESOLUTIONS, INC. <br /> November 9 , 1998 <br /> ERI 2055.1,02 <br /> Mr. Anthony Mendes <br /> San Joaquin Valley Unified Air Pollution Control District <br /> 4230 l ierman Avenue, Ste. 130 <br /> Modesto. California 95356 <br /> Subject: Notification of Vapor Extraction'rest at Tosca 76 Service Station # 5886, <br /> 2701 March Lane, Stockton, California, <br /> Mr. Mendes: <br /> At the request of Tosco Marketing Company, (Tosco), Environmental Resolutions, Inc. (ERY) is <br /> notifying your office of the scheduled vapor extraction test to be performed at 2701 March Lane, <br /> Stockton, California. The proposed work includes conducting an extended sail vapor extraction test <br /> for up to one week in duration. The purpose of the test is to evaluate methyl tertiary butyl ether <br /> (MTBE) concentrations in the vadose zone and subsurface characteristics with respect to vapor <br /> transport. Data from the test maybe used to evaluate whether concentrations of MTBE in the vapor- <br /> phase are being removed, optimal flow rates, and the radius of influence associated with the selected <br /> air flow rates. ERI will periodically collect influent vapor samples for submittal to Tosco's contract <br /> laboratory for analyses for TPHg, BTEX, and MTBE. <br /> The vapor extraction test equipment will consist of a 1.5 horse power Rotron blower, three 200- <br /> pound vapor-phase carbon vessels for abatement, and associated instruments for treasuring flow, <br /> temperature, vacuum and hydrocarbon vapor concentrations. ERI will utilize existine onsite wells <br /> (MW2, and MW3) for vapor extraction and will rotate extraction wells based on the influent <br /> concentrations. The location of the wells are shown on the attached Map of Area. The work is <br /> scheduled to commence on November 16, 1998 with an anticipated duration of up to five days. <br /> Vapor extraction will occur approximately 12-hours per day. <br /> ENVIRONMENTAL HEALTH DIVISION Z �� T3`t A446l PbVjor l KJ3,1140M TKnoO <br /> 304 E. Weber Ave.Third Floor �q L fttlt> <br /> P. O. Box 388, Stockton CA 95201-0388 �y� �tOJ cj QfLE35ttYt A'f t 1 `1 � <br /> Approved ,Q" St'a�'u� 6Z D(X� <br /> Denied ❑ Af DII&+ mA-11lStn� art, <br /> t,��Conditions R yEIDH/ TD AecUwaq QJ ftfls wntuFfL <br /> jtnalvVb 51i'(W SV5?em- �tkt6'l)tXAwl <br /> (Zl2 V�Iit tC PPrPIY.tPftRA+� t7E2 QomsNO�t�f� <br /> Date by i <br /> 1' WL-Ve- 11VIA6VYIW f1+E CyP5rll4l <br /> 10*Iri7i D„tT"c4 - �T+�o whet + <br /> SI'� ; d a2ym\) SPifreD or- A)- u,� ou'orla, <br /> •t572, 1,1 <br /> Ir✓ A f-dgmR1- I0D�0A"0r1u1•Iv <br /> I'}{Q(iAJEl) Srvt�2n1- N1+S1U11� >�t1 �Cf�) I� Ih Si,ElttJ <br /> .11✓l TbStbjdw(Aw7, P�+utL PeoJtolncl <br /> Vott65 10 iki5 ej;0e;7M- PttAS> r <br /> 74 DIgite)Ddm,SuRe 6,Novato,CaNwrNa 94949 415.382-9105 (FAK 41"62-1856) 146(4ni M !N <br /> Lake forest • Novato •SeefHe A Tltb M <br /> �ll> ni-tr�sl Ck21 Ylt5rvl►�utu Za�l 4�3- 01��11 r7nt 1N1, PRVr7N I1P1i14�1 <br /> QQ} �1( 'rl aw - gllc --4-1u - 70ON fAx �DTtiY�Y1P(fi• <br />