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r JWAM <br /> AP% <br /> Working to Restore Nature <br /> i42301 Albrat Street <br /> Fremont.California 94538 <br /> Phone-(510)651-1906 <br /> FAX(510)651-8647 <br /> March 19, 1992 <br /> Project No. 3.491.32.33 <br /> San Joaquin County Public Health Services ' <br /> Environmental Health Services <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> Attention: Mr. Steven K, Schneider <br /> Environmental Health Specialist <br /> Subject: Addendum to Environmental Investigation,Phase IV <br /> Quik Stop Market No. 132, 3553 W. Hammer Lane, Stockton, Californi <br /> Dear Mr. Schneider: <br /> This addendum is in response to our phone conversation of March 18, 1992. During this <br /> conversation you said you would need the following items for us to proceed, with this <br /> investigation: 1) Shallow groundwater survey technique; 2) Direction of'subsequent <br /> investigations; 3) City of Stockton Encroachment Permit; 4) Permission to enter urger Kip <br /> property; 5) Content of report on shallow groundwater survey; and 6)Application for permit wi <br /> fees. <br /> 1 . Shallow Groundwater Survey Technique <br /> The entire operation is conducted from the back of a truck or van operated by Tracer <br /> Research Corporation of Tucson, Arizona. A 1-112-Inch-diameter hole is drilled through the <br /> asphalt or concrete, a 314-inch-diameter steel probe is then inserted into this hol� and pushed <br /> to the desired depth, in this case about 15 feet, by a hydraulic pusher-puller In hanism. A <br /> tygon tube is then inserted into the probe and a water sample is collected. The ater sample <br /> Is analyzed on-site by either a Varian or Hewlett-Packard gas chromatograph wit computing <br /> integrators and lap-top computers and printers. Total acquisition time of each sampling <br /> location is approximately 20 to 40 minutes. Once sampling has been completed,Ithe probe is <br /> withdrawn and the hole is backfilled with granulated bentonite and capped with 04phalt patch. <br /> 2 .. Direction of Subsequent Investigations <br /> The purpose of this shallow groundwater survey is to determine if the contanunation of the <br /> perched aquifer can be detected on the eastern side of the Taco Bell property or;along West <br /> Hammer Lane adjacent to the Taco Bell property. It will also provide inforiation on the <br /> extent of the perched aquifer. If contamination is detected on the eastern side of Taco Bell, <br /> then future investigations will be conducted to the east. Ifcontarnination is not detected,then <br /> dependent on the results of the investigation, RESNA Industries Inc. (RESNA) would <br /> probably recommend the installation of one or more groundwater monitoring'.wcils. The <br /> i <br /> #: tS6ZZ'l5$0l9L WVLZ:OI ; Z6-0Z—E : OZOL aeYdooelel x0aaX:A9 INKS <br />