SITE INFORMATION AND CORRESPONDENCE FILE 1

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1✓ `�`- / FOOTHILL �ENOINEERINO �� 3 12793 PADDY CREEK LANE LODI, CA 95240 00 SEp 15 79 PH. (209) 368-9381 FAX (209) 367-1163 September 12, 2000 Ms. Carol Oz San Joaquin County Public Health Services Environmental Health Division P. O. Box 388 Stockton, CA 95201 Site Code 1038 Subject: Your Letter of September 11, 2000 to Michael D. & Sharon Olivarez Dear Ms. Oz: Please be advised that your letter of September 11,2000 was received by both the addressee and this consultant on the September 12, 2000. The property owner and this consultant are making every effort to meet your demanding work schedule on this project. To date the Michael and Sharon Olivarez have spent more than$80,000 on the investigation of this site and the quarterly samples for the site monitoring wells were sampled on August 30, 2000. The work on this site is being pursued at a rate that man power and financial resources will allow. As you know,the offsite investigation work was started with CPT#3 located in the Caltrans R/W.On May 3, 2000, an attempt was made to install a monitoring well in the sidewalk on the north side of Lafayette Street. This attempt was met with the discovery of an unknown steel underground storage tank (UST) directly under the proposed monitoring well location at a depth of five feet. After the Stockton Fire Department,the City of Stockton inspector and yourself left the site the bore hole was bridged and concrete was placed to the finish grade of the sidewalk(See attached site map). Due to the extreme safety hazard and the potential liability to all parties concerned, it is recommended that no further work be performed in this area until the USTs are removed. The local agencies should meet to determine who is responsible for this UST and other unknown USTs. Until the area is cleared of known and unknown hazards presented by the UST, it is not in the best interest of Michael and Sharon Olivarez to obtain an encroachment permit from the City of Stockton for the sidewalk area on the north side of Lafayette Street. As for the well receptor survey,California Water Service Co.has abandoned its only domestic water well within 2000 feet of the site. This consultant has not completed a full surface investigation for water wells or a review of the Department of Water Resources data on existing wells within a 2000' radius of the site. This receptor survey should be completed by the end of September and the results issued with the third quarter report of monitoring wells. Page 1 of 2