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PUBLIC HEALTH SERVICES ,0P <br /> SAN JOAQUIN COUNTY e: <br /> X <br /> JOG[KHANNA M.D..M.P.H. <br /> Health Officer <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) • Stockton, California 95201 <br /> (209) 468-3400 <br /> HENRY CECCHINI ETAL <br /> CECCHINI CECCHINI AND GIOVANNONI <br /> 3000 E EIGHTEENTH ST SEP 16 199 <br /> ANTIOCH CA 94509 <br /> RE: Delta Truck (former) SITE CODE: 1800 <br /> 3535 E Cherokee Rd. <br /> Stockton, CA 95205 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) has reviewed the <br /> "Third Quarter 1993" groundwater monitoring report prepared by Environmental Science and Engineering, <br /> Inc. for the above referenced site and has the following comments. <br /> It was stated that groundwater elevation data was not contoured because of the extremely flat surface. While <br /> gradients in San Joaquin County are slight they can be determined. PHS/EHD can not evaluate or recommend <br /> areas for additional monitoring wells without gradient determination. The lateral limits of the existing <br /> groundwater contamination needs to be defined. Submit a workplan to investigate the extent of contamination <br /> from the unauthorized release of the underground tank(s) within ninety (90) days of this letter. Utilize <br /> reporting criteria included within the Problem Assessment Report as listed on page A-9 of the Tri Regional <br /> Guidelines, supported by State Water Resources Control Board (SWRCB) Resolution #92-49. <br /> Pursuant to Section 2652(d) of the Underground Storage Tank Regulations (California Code of Regulations, <br /> Title 23, Chapter 16) a quarterly monitoring report shall be submitted to Public Health Services, <br /> Environmental Health Division and Central Valley Regional Water Quality Control Board(CVRWQCB)until <br /> the investigation and cleanup of the site is deemed adequate. The report is to show the: <br /> -status of investigation and cleanup activities including the results of all investigations <br /> completed to date; <br /> -proposed continuing or next phase of investigation; <br /> -method of cleanup proposed or implemented,schedules for the completion of the <br /> investigation of the site and remediation; <br /> -method and location of disposal of the released hazardous substance and any contaminated <br /> soil, groundwater or surface water; <br /> -manifest required for transport of hazardous substances; <br /> -monitoring well data including groundwater elevation, pH, conductivity, gradient; <br /> -analytical results of groundwater or soil sampling; and <br /> -site map showing the "zero line" of contamination, if known, and changes in the above <br /> measurements over the last quarter. <br /> Therefore, groundwater gradient determination from UST-1,SI-1, SI-2, and SI-3 should be included in your <br /> quarterly reports. Please call Michael Infurna for an appointment to witness quarterly sampling events. <br /> Groundwater analysis from the domestic water wells on site utilized incorrect detection limits for TPH Diesel. <br /> A detection limit of 50 micrograms per liter (ug/1) or .05 milligrams per liter (mg/1) shall be used for TPH <br /> Diesel analysis in ground water utilizing EPA Method 8015 with GCFID (3510) preparation. <br /> A Division of San Joaquin County Health Care Services 10 <br />