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7 <br /> 4' <br /> THOMAS AND ASSOCIATES <br /> Engineering and Environmental Consultants <br /> 1 Donner Creek Ct. Clayton, CA 94517 510-672-7976 --- VAX 51047-2-5837 <br /> FACSIMILE <br /> 0- 72- <br /> FACSIMILE TRANSMISSION COVER PAGE <br /> Date: December 3, 1996 <br /> To: Mr. Ed Ralston <br /> UNOCAL <br /> 510-277-2311 <br /> FAX: 510-277-2309 <br /> No. Pages (including cover): 6 <br /> From: Thomas Stoflet � <br /> Subject: UST CLOSURE AND SITE CLOSURE <br /> 1034 CENTRAL AVENUE <br /> TRACY, CALIFORNIA <br /> I <br /> Message: This FAX follows up on our conversations regarding the subject matter. <br /> UST Closure <br /> Wells Fargo Bank(WFB) is still concerned regarding further demonstration of the absence of the <br /> third UST in the northwestern portion of the site as shown of the attached UNOCAL drawing. <br /> As shown on the attached sketch, metal of equivalent was found at depths of 4 to 4.5 feet below <br /> grade (bgs) in two hand augered borings (No. 1 and 3). This depth is the same depth where the <br /> other two recently removed USTs were found. Based upon scaling the UNOCAL drawing, the <br /> diameter of the third UST may be 4 feet and its possible location is shown on the sketch. While <br /> the interferences (e.g., metal) found in the borings could also be a pipe, their presence and the <br /> pipes believed to be from the third UST which were left in the excavation casts some suspicion <br /> on the absence of the third UST. Therefore, WFB requests that additional borings be advanced <br /> on the other side of the traffic control box via coring through the concrete sidewalk. The I <br /> recommended locations of the borings are shown on the attached sketch, but they can be relocated <br /> to eliminate any interferences due to utilities for example. If no impediments are found in these <br /> borings, then these findings along with other findings (e.g., observation during trenching) can be <br /> used. to support a conclusion that the third UST has been removed. <br /> I <br /> This facsimile transmission is intended only for use of the individual or entity to which it is addressed and may contain <br /> information that is privileged,confidential and exempt from disclosure under applicable law. If the reader of this message is not <br /> the intended recipient,or the employee or agent responsible for delivering the message to the intended recipient,you are hereby <br /> notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you received this <br /> communication in error, please notify us immediately by telephone and return the original message to us at the above address <br /> via US. postal service. Thank you. <br /> 1 <br /> II <br /> 4 <br />