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ENVIRONMENTAL <br /> MANAGEMENT <br /> I N C <br /> April 11, 1997 <br />' Ms Mary Meays <br /> Senior Registered Environmental Health Specialist <br />' San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber, Third Floor <br />' Stockton, California 95201-0388 <br /> SUBJECT Adsa to Soil and Groundwater Investigation <br />' Stockton Federal Building <br /> 401 North San Joaquin <br /> Stockton, California 95201 <br />' Sit ,-Code 505260 <br /> Dear Ms Meaysi ,� <br />' Please find the encloseq Addenda to Soil and Groundwater Investigation Report for the above <br /> � eg P <br /> referenced project which bias 'been prepared by Cape Environmental Management Inc (CAPE) <br /> The purpose of this addenda is to provide supplemental information for the previously <br /> submitted Soil and Groundwater Investigation Report, dated November 1996, and to address <br />' the review comments referenced in a letter from the San Joaquin County, Environmental <br /> Health Division (EHD), dated January 1997 The Soil and Groundwater Investigation Report <br /> document was reviewed by Mr William W Millar, a registered geologist and Manager of <br />' Environmental Services for CAPE Work performed during the current and previous <br /> investigations has been conducted under the direct oversight of Mr Millar whose signature <br /> and stamp is included as an attachment to this addendum Please see Attachment I, CAPE <br /> Team Members and Signature Page <br /> As appropriately refer graced,in the EHD letter, the method detgrtion limit for soil sample B4- <br />' 15' was erroneously reported by the laboratory Due to a dilution factor of 500, the method <br /> detection limit for benzdne, toluene, ethylbenzene, and xylenes (BTEX) analysis of soil sample <br /> B4-15' should have been reported as 2,500 µg/Kg The analytical laboratory, Curtis and <br />' Tompkins, has i`ssubd a revised corrected report which is enclosed as Attachment II Also, a <br /> revised Table 4l1 - Summary of Analytical Results (Soil) is included as Attachment HI and <br />' reflects the corrected method detection limits As a result of this laboratory reporting error, <br /> analysis of BTEX compounds in this sample can not be quantified below the 2,500 µg/Kg <br /> Harbor Corporate Park <br /> 3631 So Harbor Blvd Suite 130 <br /> Santa Ana CA 32704 <br /> 7 1 4 4 2 7 6 1 6 0 <br />' F A 11 4 2 7 6 1 6 1 i <br />