SITE INFORMATION AND CORRESPONDENCE FILE 1

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I - ENVIRONMENTAL HEALTH DEPARTMENT SAN JOAQUIN COUNTY Unit Supervisors r 2� Donna K. Heran, R.E.H.S. Carl Bergman, R.E.H.S . Q 304 East Weber Avenue, Third Floor DirectorMike Huggins, R.E.H.S., R.D 1. Al Olsen, R.e•xs. Stockton, California 95202-2708 Douglas W. Wilson, R.E.H.S . Progrnm Manage)-€ Telephone : (209) 468-3420 Margaret Liguria, R.E.H .S . • � ., .� ,.�e S / FORS Laurie A. Cotulla, R.E.H.S' Fax : (209) 464-0138 Robert McClellan, R.E.H.S. Progrmn Manager Mark Barcellos,. R.E.H.S. APR 13 2004 R ELLIS JR ETHYL D ELLIS TRUSTEE ETAL 1991 W LINCOLN ROAD STOCKTON CA 95207 - 2462 RE: California Tank Lines, Inc . SITE CODE 001095 3105 South El Dorado Street Stockton, California 95206 ! San Joaquin County Environmental Health Department (EHD) staff was on site for the March 10, 2004, groundwater-monitoring event and discovered that the pH, temperature, and electrical conductivity data were not measured before and during the purging process prior to collecting groundwater samples. EHD considers these parameters important indicators that the groundwater has stabilized and directs you to include these measurements in all reported future sampling events at this site. EHD has provided Environeering, Inc . (EI) with San Joaquin County Environmental Health Department Recommended Groundwater Sampling Guideline. In addition to these recommendations, please provide EHD the composition of the solution used for decontamination. All 55 -gallon drums on site should be labeled and groundwater samples should be placed immediately in a cooler with temperature of approximately four degrees centigrade when analysis for volatile compounds is planned. At the request of Dawn Sorenson, EHD notes the following items that should be part of future quarterly groundwater monitoring reports: 1 . Include a copy of the original field sheets in the quarterly reports. Reproductions of the data, can be included, but should not be used in place of the field sheets. 2. Laboratory sample identifications should list monitoring well designations, i.e., MW-25 MW-3 , and MW-4, instead of the laboratory identifications: fence, street, diesel USTs, and oil USTs. 3 . Laboratory reports should include the following for every analysis: method blank results; surrogate recoveries (including diesel and motor oil surrogate recoveries); recoveries for laboratory control samples (LCS), and matrix spikes (MS) if analyzed using site samples; and quality control limits for the surrogates, LCS, MS, and relative percent differences. 4. San Joaquin County Public Health Services has been changed to San Joaquin County I Environmental Health Department. Please correct this in future reports. 5 . Please include the units such as micrograms per liter (µg/L) or milligrams per liter (mg/L) in Table 2 instead of listing the units in the Notes section. It is best to report method 8260B analytical results in µg/L because these are the units that the laboratory reports and these are the units commonly used industry-wide for these compounds. Also Table 2 datum is more informative if less than the reporting limit (example <100) is r pl E