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I San Joaquin County DIRECTOR o i N Donna Heran, REHS oP, . . . Environmental Health Department r ASSISTANT DIRECTOR 2 . 600 East Main Street Laurie Cotulla, REHS Q Stockton , California 95202 -3029 PROGRAM COORDINATORS Mike Huggins, REHS, RDI oq . �� c Website: wwwsjgov. org/ehd Margaret Lagorio, REHS i F o R Robert McClellon, REHS Phone: (209) 468-3420 Jeff Carruesco, REHS, RDI Fax: (209) 464=0138 Kasey Foley, REHS April 9, 2009 David Guardino and Pat Guardino Guardino and Crawford Construction 517 W Fremont St. Stockton , CA 95201 Subject: Guardino and Crawford Site Code : 1112 517 W. Fremont St. Stockton , CA 95201 The San Joaquin County Environmental Health Department (EHD) has reviewed Quarterly Report — Third Quarter 2008 (3rdQR) dated February 11 , 2009, and Quarterly Report — Fourth Quarter 2008 (4thQR) dated March 30, 2009 prepared by your consultant, Advanced Geo Environmental , Inc. (AGE). In the 3`dQR, AGE recommends eliminating analysis for tertiary butyl ether (TBA) , di-isopropyl ether (DIPE) , and 1 ,2- dibromoethane (EDB) from the ground water monitoring program. The EHD concurs with eliminating these contaminants from analysis and recommends eliminating analysis for MTBE and ETBE as well . In the 41h QR, AGE recommends "continued minimal quarterly ground water monitoring at the site . . . removal of sampling wells without typical detections of hydrocarbons and/or long term trends and stable trends of hydrocarbons detections . " This language doesn't specify a sampling frequency for the wells at the site. In a letter dated January 16 , 2009 (EHD letter) , the EHD directed that the sampling frequency of selected monitoring wells be reduced . The EHD amends the previous directive for frequency of groundwater sampling for monitoring wells to the following ; MW-2 through MW-8 can be sampled biennially and MW1 , 0131 , 0132 and EW1 are to be sampled quarterly. The depth to water measurements should continue in all wells on a quarterly basis to determine the groundwater gradient. The EHD letter also noted that remediation and observation wells had been installed but the EHD had not been notified that the approved pilot tests had been conducted . The EHD directed that if the pilot tests had not been performed , that they had be completed by March 16 , 2009, and that a Remediation Feasibility Report had to be submitted to Geotracker within 60 days of the completion of the pilot test. The EHD still has not received any notification for conducting the pilot test and no report has been submitted to Geotracker. Therefore, you are out of compliance with the EHD directives . The EHD directs that the pilot test be conducted within 30 days of the date of this letter. Please provide the EHD a minimum 48-hour notice prior to initiation of any tests.