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J ENVIRONEERING� INC. <br /> Process Engineering,Water Reuse, and Accident Prevention <br /> May 6,2004 <br /> Ms Vicki McCartney <br /> *� San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue,Third Floor <br /> Stockton,CA 95202-2708 <br /> �. SITE CODE 001095 <br /> x <br /> RE California Tank Lines, Inc <br /> 3105 South E1 Dorado Street <br /> Stockton CA,95206 <br /> In response to the letter received from EHD dated 04113104, Environeenng, Inc (E!) is pleased <br /> to provide EHD with the following information <br /> All future sampling events will include pH, temperature and conductivity readings before <br /> and during the purging process <br /> "d� ■ The decontamination solution used on 03/10/04 was Liquinox <br /> w = ■ The 55-gal drums containing the purged groundwater will be labeled <br /> All samples will be placed immediately upon collection into a cooler with a temperature of <br /> 4°C <br /> 4 q6 <br /> Items concerning the groundwater monitonn re arts <br /> ry r¢w. 1 Attached is the new"Groundwater Sampling Guide and Field Notes" that El will be using <br /> for each future groundwater sampling event This document will replace the previously <br /> used field sheets and the original will be included in all subsequent quarterly reports <br /> 2 El will use the monitoring well designation number instead of the well locations on a!1 <br /> Chain of Custody sheets <br /> Lam; r 3 El is coordinating with the laboratory to include the QA/QC data listed in #3 of the letter <br /> dated 04113/04 in each laboratory report <br /> 4 All references to "San Joaquin County Public Health Services" will be changed to "San <br /> Joaquin County Environmental Health Department" in all future correspondence <br /> 5 Table 2 has been revised The units of all analytical results have been changed to ppb <br /> (µg11) and all results have been reviewed for correctness Also, the reporting limit has <br /> been included instead of ND <br /> 6 The superscripts have been removed.from Table 2 to prevent confusion <br /> 7 Oxygenates in Table 2 have been separated into the individual components <br /> 8 1,2-DCA and EDB will be added to the analytical list and will be reported in Q22004's <br /> report ECE6V Ci <br /> 9 Section 5 2 will be revised to reflect the correct analytical results <br /> �N���jMA Y 10 2004 <br /> P 0 Box 2498,Danville,CA 44526 • (925)838-1763 Fax(425)84-WInMNMSERHEALTH <br /> I�'t GK'S <br />