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_ � r <br /> PEC: El1/ED <br /> tide t � <br /> g L�ramento,CA 95670 <br /> eft 9 t 6 r,38-2085 <br /> FAX 910 013 8385 <br /> EEnylrenmentai <br /> Consultants,Inc. <br /> C.r <br /> . i'L t-5i <br /> L tt"ia .. .�..n <br /> SEP 9 19q <br /> �;Vi�!%.01�l�vlt=i•�ITA( i�E�.�T'ri <br /> � <br /> 1991 <br /> August _7, <br /> Mr. Glenn R.Dembroff <br /> Ultramar Inc. <br /> 525 West Third Street <br /> Hanford,California 93230 <br /> Subject: Quarterly Monitoring Letter Report,Second Quarter 1991 <br /> Beacon Station No.696 di,California <br /> 244$West Kettleman Lane,Lo <br /> Delta Project No.40.90-839 <br /> Dear Mr, Dembroff: <br /> Inc. (Delta), has been authorized by 1Jltramar inc. (Ultramar), to <br /> Delta Environmental Consultants, round water beneath to Beacon Station No. 696 located at <br /> conduct an investigation of the soil and g performed at the site. <br /> West Kettleman lane•Lodi•California. The location f atertmonitc�r�ngtpFlgure 1. This eller <br /> 2448 quarterly <br /> *round water samples were collec[cd far analysis on Julie 19. <br /> report contains results of the most recent 9 Y ground <br /> Ground water levels were measured and b <br /> 1991. <br /> All work conducted at the site by Delta was performed in accordance with the field methods an <br /> procedures described in Enclosure A. Figure 2. Thirty of <br /> d and the remaining four wells contain MW 35. and roMW 36on <br /> A total of 34 in wells are present at and adjacent to the site as shofflCast wn in Irable <br /> these monitoring w' are currently dry V. 20, M <br /> Ground water level data collected from monitoring wells M Ground <br /> resented in i able t with previous ground water level data. Ground water was <br /> June 19, 1991, are p roxable I St and 52 feet below the surface on June 19, 199" <br /> y 1991, data are illustrated in Figure 3. These contours <br /> Pat the site between app 3) with an avarage <br /> water table coniaurs based on the June 19, <br /> indicate the inferred ground ' flow <br /> )�2a fa Ip fool on is ward the south (Figure <br /> hydraulic gradient of approximately <br /> 1991,were submitted to a Cal ifurnia•c BTEX)l�n�tool <br /> ry <br /> les collected on June 19, t91,were <br /> esubmittid I and xylenes <br /> Ground water sameand the analyt'"l <br /> as gasoline- A summary of these analytical results, <br /> to determine the concentration s 1)"alinezone, tcs of the field sampling information <br /> petroleum hydrocarbons(TPH) b based on the <br /> A dissolved benzene concentration map ies of the <br /> results from previous sampling events is presented in Table 2. �p �p <br /> sheets are pry roue water Enclosure <br /> sampl B analytical tical results Is illustrated in Figure 4. <br /> June 19, 1991, b reports are presented in Enclosure C. <br /> 19,.1991,ground water sample lahuratary p <br /> Delta Delivers Solutions <br />