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y�OOC:ECyf/E;4 <br /> February 16, 1994 ' <br /> Project Number 64021 . <br /> I� k <br /> r Mr. Charles Green <br /> Walnut Street Medical Center <br /> 1610 North El Dorado S treet <br /> Stockton, California 95294 <br /> PHASE II LIMITED INVESTIGATION <br /> WALNUT STREET MEDICAL CENTER II <br /> 1617 North California Street <br /> Stockton, California. <br /> Dear Mr. Green: <br /> In accordance with your request, Northwest Envirocon, Inc. (NWE) <br /> has completed additional environmental services on.the property located at <br /> 1617 North California Street in Stockton, California. These services were <br /> performed under the service agreement between Mr. Charles Green/Walnut <br /> Street Medical Center and NWE. The scope of services is summarized as <br /> follows: <br /> • Conduct hand augering in the vicinity of tl ie geophysical anomalies <br /> previously identified during the January 10, 1994 geophysical <br /> survey by NORCAL Geophysical Consultants, Incorporated to a <br /> maximum depthlof 10 feet below ground surface. Soil encountered <br /> during augering will be visually examined and described on boring <br /> logs and obstructions encountered that may indicate the presence of <br /> an Underground Storage Tank (UST) wiff be noted. Soil samples <br /> will be screened for the presence of organic vapors in the field using <br /> a photoionization detector. The total number of hand augered <br /> borings that will be required can not be determined, however, it is <br /> anticipated that field work will require a m IaX mum of one day. <br /> Provide a report (2 copies) documenting the findings of the <br /> investigation and making recommendations for additional actions as <br /> necessary. <br /> INTRODUCTION <br /> L On February 11, 1994 two (2) representatives from NWE completed five <br /> (5) hand augered soil borings (B-1 through B-5) to a maximum depth of ten (10) <br /> feet within the vicinity of the geophysical anomalies previously identified near the <br /> t, southeast corner of the subject Property. Two (2) additional hand augered soil <br /> borings (B-6 and B-8) were also attempted near the southern portion of the <br /> anomalies, however, due to subsurface obstructions (over-sized concrete aggregate <br /> it <br /> l.� M <br /> ii <br />