SITE INFORMATION AND CORRESPONDENCE FILE 1

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i Michael J . Infurna Jr. Senior REHS JoaquinSan Public Health Services, Site Mitigation Unit IV / LOP Environmental Health Fifth Floor (209) 468=3454 fax : (209) 468 =3433 Stockton, CA., 95202 From : MICHAEL INFURNA, REHS To : Paul Dotson & Bob Marty, AGE Fax #: 467=1118 Pages : 2 Date : May 3 , 2001 Re : Fernandos ( 1201 Center) work plan approval w/comments . • Comments : Here's the WP approval . Please notice the comment section . I think a deep investigation is needed in MW-3A area since this deep well set at 100'-105' bgs is still very hot. Prior to setting deep wells, CPTs should delineate the deep extent first. I 'm very concerned with the vertical extent in former UST=3 area. This may set the target depth for all laterally deep investigations. Once the vertical and lateral extent of the deep problem is defined, go ahead and place as many MWs as needed to monitor the intervals with the high levels of contam . Just two screened zones may NOT be adequate. Go ahead and do the 4 CPTs you proposed, add one more at MW= 3A area. Once the lab data verifies the level of impact at various depths , you may install the MWs . You may need to add another CPT in the offsite area at extreme Northeast where your two MWs are proposed. See? Call me and we can work out the details. I 'm willing to revise this approval letter to meet your needs and cost changes for multi -mobilization . STATEMENT OF CONFIDENTIALITY The information in this facsimile is legally privileged and confidential information intended only for the use of the addressee listed on this cover sheet. If the reader of this message is not the intended recipient, or the employee or agent responsible to deliver it to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this telecopy is strictly prohibited. If you have received this facsimile in error, please immediately notify us by telephone at the number listed on this cover sheet and return the original message to us at the above address via United States Postal Service. We will reimburse your costs in notifying us and returning the message to us. Thank You.