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B R 0 W N A S DE-� �k� l;r,�l_T�l <br /> C A L D W E L L <br /> i <br /> September 14, 1994 <br /> Mr. John Gagliano <br /> Caltrans Permitting . <br /> Post Office Box 2048 <br /> Stockton, California 95201 017-1506-01/1 <br /> i3. <br /> Subject: Request for Permission to Install One Groundwater Monitoring Well <br /> on Caltrans Property at Interstate 5 and Benjamin Holt Drive near <br /> ARCO Station 2133, Stockton, California <br /> Dear Mr. Gagliano: <br /> This letter is a second request to install one groundwater monitoring well on Caltrans' <br /> property near the north-bound Interstate 5 off-ramp at Benjamin Holt Drive. The first request <br /> was submitted in a March 17, 1994 letter to Caltrans. The proposed well would be installed <br /> in the 60-foot-wide open area between the off-ramp and the concrete wall that defines the <br /> western edge of the ARCO Products Company (ARCO) property. Figure 1 shows the <br /> proposed location of the well. <br /> The San Joaquin County Public Health Services, Environmental Health-Division (County), is <br /> requiring that ARCO conduct an investigation of the soil and groundwater to the west and <br /> southwest of the ARCO facility on Caltrans' property. Currently, ARCO has groundwater <br /> monitoring wells located on the western and southern edges of the ARCO property. <br /> The well would be installed using a truck-mounted hollow-stem auger drill rig. The well <br /> would be approximately 30 feet deep and would be completed in a flush-mounted traffic box. <br /> The installation of the well in the Caltrans property will be completed within two days. After <br /> the well is installed, groundwater samples will be collected from the well on a quarterly basis. <br /> Other periodic maintenance on the well may be required. The well is expected to be in place <br /> for at least five years. <br /> Enclosed with this letter are two copies of an ARCO access agreement. If you agree with the <br /> terms and conditions of the agreement, please sign both copies and return them to me. We <br /> will forward the agreements to ARCO for their signature and then return one fully executed <br /> copy to you. <br /> 09r14/94\E\1506\�CORRESPU 506-01.L-6 <br /> QMS-PS410 <br /> Environmental Engineering And Consulting-Analytical Services <br /> 9616 MICRON AVENUE, P.O. Box 13449, SACRAMENTO, CA 95813-3449 <br /> (916) 444.0123 FAX (916) 856-5277 <br />