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IWO, <br /> TAAI <br /> GA DRER R ECFJvEr) <br /> �} DDDRE <br /> 1UL 25 igg <br /> INC <br /> 6000 <br /> Color Spot, Inc.. July;22,.1.993 <br /> P.O. Box 5011 Reference- M88:169H <br /> ... ....... <br /> Richmond,. California, 948015, <br /> Attention: W Kevin:Adams <br /> Executive Vice President <br /> S.* t. Clarification and Update of Information Presented in the Staal, Gardner & Dunne, <br /> Inc, Letter�Reuort Titled Environme_nlgf Services... Undereroimd :Slgaft Tank <br /> Re oval. Color spat. inc.'2 Lodi. . ated.14 arch 28, `19$9: <br /> 'California_orriia Facili <br /> Dear W Adams: <br /> response sponse. to: our recent discussions, this letter is to olarify an issue pertaining t o St* <br /> . .. . <br /> Odra 9(SQP initial..�. e er-report concerning Color Sp Lodi facility. .G <br /> Gardner D40ne'.Ine-i 1 tt p. ity�. S_- D <br /> feels that based onjofom onq0e;ted over the past four years:a statementconveyed m*our initial <br /> :report.:pertaining to the removal and permanent abandonment of a.4�PWallon-capacity uftdergtound <br /> storage tank (UM requires :additional comment. <br /> Our fetter-report; dated IVlarch 14, 1989; documents the removal and abandonment of the <br /> :4,000-gallon-capacity UST which was:utilized for the storage of diesel fuel. SGD observed the field <br /> Activities required for the removal of the UST in late February and.early March 1989. -Following <br /> the temovai ofthe UST, SGD: observed the collection of 2 verification soil samples for cho=ical <br /> Analvsis from the resultant UST excavation. These soil samples were collected i by a representativw <br /> of a contracted chemical analytical laboratory (Canome Environmental Services Corporation),wh4. <br /> was subcontracted to Color Spot, Inc.'s UST removal contractor (Jim Thorpe Oil). The samples <br /> were collected in the presence of both SGD and a representative: :of San Joaqtu'n County Public. <br /> Health Services, Environmental Health Division. <br /> Because the verification samples were collected by a subcontracted laboratory, SGD had no <br /> control over the laboratory analytical Program, including the selection of appropriate detection limits. <br /> As a result, the detection limits utilized by Canonie Environmental Services Corporation (Canonie) <br /> for benzene was in SGD's opinion not appropriate. Canonie utilized benzene detection limits of 0.25 <br /> parts per million (ppm)and 0.025 ppm which were significantly in excess of the applied action level <br /> for benzene of 0,001 ppm. Therefore, at the time of the UST removal program, it was our <br /> professional opinion that insufficient data existed to conclude that benzene concentrations did not <br /> exist in the soils surrounding the UST. As a result, SGD inferred in our March 28, 1989 document <br /> that possibly benzene may have been present in the soils adjacent to the former UST_ <br /> 0 <br /> 5855 Olivas Park Drive Ventura,,, California9003- b72c :805/650-7000 Flax; 805/650-701 <br />