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01/20/2004 13:26 2095224227 GEOLOGICAL TECHNICS PAGE 03 Geelogkal ro kri�slnc Page 2 Emironmeatal Review Project#1143.5 January 12,2002 1. Review of: Phase I -Environmental Site Assessment Preformed by: All Environmental, Inc. For: Mr. Joe Rokoszewski Dated: October 10, 1994 Location: 2417 West Lane, Stockton, CA Although this report is more than eight (8) years old it appears that very little has changed on the site since that time relative to buildings and Property uses. Notable information that this report is missing are: • No information is present from County Assessor files. These files often contain important information including, but not limited to, ownership, building permits, property usage history and location of things like underground storage tanks (USTs) and ASTs. • No historical aerials earlier than 1979 were reviewed. This may not be significant because the present owners have been present since 1957 with continuous similar uses during that period. • No closure was included for the UST that was closed in place and no testing is reported to have been done during that closure. The Owner states that he was told that no closures are given for USTs closed in place. It is GTI's experience that closures may be obtained after the San Joaquin County Environmental Health Division (SJCEHD) accepts a work plan designed for this purpose. If closure is desired a work-plan would need to be accepted by the SJCEHD for additional work that would satisfy their requirements. • No closure was present for the cleanup of the former steam cleaning holding pit. All excavated soil was removed from the Property.Again, it is the Owner's understanding that a closure is not given for this type of work. Test results are included in the report indicating that the gasoline constituents tested for were not detected. However, low levels of Total Chromium were present. The type of Chromium was not indicated and no discussion was included as to the SJCEHD's comments about this. No testing appears to have been done directly beneath the pit itself and the reason for this is not included in the Report of Cleanup. If closure is desired a work-plan would need to be accepted by the SJCEHD for additional work that would satisfy their requirements for closure. 2. Review of: Transaction Screen Performed by: Environeer'ing, Inc. For: R& L Diesel Services, Inc. Dated: February 29, 2000 Location: 2417 West Lane, Stockton, CA This report was done in February 2000- Its discussion includes: • A discussion about the new steam cleaning unit is included and a question was raised about whether this area has enough containment for the contents of the Diesel AST if it should rupture. GTI's site visit included reviewing this area. More work would have to be done to verify if this area could contain a spill or rupture but it appears that it would. • The discussion about the 600-gallon UST that was closed in place talks about a letter from SJCEHD which stated that they "found no evidence to indicate an unauthorized release of petroleum hydrocarbons". This letter was not included in the report pages provided to GTI. If a copy of this letter is needed GTI would have to do additional work to locate a copy.