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AW <br /> Working To Restore Nature <br /> • <br /> 1710 Main Street <br /> Escalon, CA 95320 <br /> Phone: (209) 838-3507 July 29, 1993 <br /> FAX: (209) 838-3509 FILE <br /> Ms. Diane Hinson <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> RE: Nor-Cal Beverage Company, 1800 E. Fremont St., Stockton, California <br /> Dear Ms. Hinson: <br /> The purpose of this report is to summarize recent field activities and laboratory results for the <br /> above referenced site (Figure 1). <br /> • On July 13, 1993, the depth to groundwater in the existing on-site well (MW-1, Figure 2) was <br /> measured to be 69.46 feet below grade. This depth is consistent with previous monitoring <br /> events (Table 1). <br /> A groundwater sample was collected on July 13, 1993 after purging and stabilization of pH, <br /> conductivity and temperature. The sample was submitted to Zymax Envirotechnology (cert. <br /> #1717) for analysis of total petroleum hydrocarbons as gasoline (TPHG) and benzene, toluene, <br /> ethylbenzene and xylenes (BTEX) utilizing EPA methods 801518020. Analytical results are <br /> summarized in Table 2. No benzene or TPHG was detected. Toluene (2.1 parts per billion <br /> [ppbj), ethylbenzene (0.7 ppb) and xylenes (4.2 ppb) were reported. Groundwater monitoring <br /> and purge data are presented in Attachment 1. Laboratory data sheets are included in <br /> Attachment 2. <br /> On July 16, 1993 a single hydropunch boring was advanced northwest (the assumed <br /> downgradient direction in the area) of the former tank excavation (Figure 2) under the direction <br /> Of Ms. Diane Hinson of San Joaquin County Public Health Services. The boring was advanced <br /> by hollow-stem auger to approximately 70 feet below grade. The hydropunch tool was then <br /> driven four feet into the saturated zone and a groundwater sample was collected. The sample <br /> was submitted to Zymax Envirotechnology for analysis of TPHO and BTEX by the methods <br /> described above. No analytes were detected. Laboratory results are presented in Table 2. <br /> Laboratory data sheets are included in Attachment 2. <br /> LU72993.FML <br />