ARCHIVED REPORTS XR0001930 - Laserfiche WebLink

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Environmental Science & Engineering,Inc XCRJYTrII'///IrI'��+■'tI A Ci4MRP C..� .y V A JUN 3 0 1993 June 28, 1993 ENVIRONMENTAL HEALTH Project 6-92-5400 PERMIT/SERVICES Cecchini, Cecchini, &c Giovannom C/O Mr. Ellis Cecchini IeL� 1312 A. Street / Antioch, California 94509 /�11C1 SUW ECT: SlzC®I�D QUAmimm 05)5 GROUND WATER 1` O1\ZTORffi\G REPORT 3535 E. CHEROKEE RGAIID, STOCK'I ON, CAILIIIFORNM Dear Mr. Cecchini- The following report documents Second Quarter 1993 Ground dater Monitoring for the fueling island area of the subject site. One well, designated UST-1, is located in the fueling island (Figure 1 - Site Plan). Well UST-1 has had problems with leakage of fuel from the surface and has been repaired twice within the last year. The latest repair was made in ® March 1993 when ESE placed a second cover and re-fitted the water tight seal on the well. The well has been in a quarterly monitoring program since October of 1992. The first quarter 1992 monitoring was delayed due to repairs needed on the well. Mork Performed This Ouarter On April 23, 1993, Environmental Science &L Engineering, Inc. (ESE) staff, in the presence of Mr. Michael Infurna of San Joaquin County Department of Environmental Health q ty P cleaned the well of debris using a pressure washer fitted with hosing n (County), g p g a d lowered down the entire length of the well Approximately 40 gallons of water was used to clean the well by this method The source of the water for cleaning was the facility drinking water supply (hose bib). Approximately 40 gallons of fluids which entered the well during the cleaning process were evacuated by hand bailing on April 23 All fluids evacuated from the well were stored in drums and remain on site. On April 28, 1993, ESE measured water levels and purged and sampled well UST -1. ESE first measured the static water level in the well using an electronic water level sounder. Then, using a electric submersible pump, approximately 150 gallons of water were purged from the well. During the purging process, pH, temperature and conductivity were measured. The well purging was considered complete when a minimum of three well volumes were evacuated, the final field measurements of pH, temp and conditions were within 15 percent of the prior measurement and the purged water was clear The ground water sample was then collected from well UST-1 by lowering a new (precleaned) O disposable polyethylene bailer in the well using new, disposable nylon cord The filled bailer 4090 Neltion Avenin Suite] Cona.ord CA 94520 Phone(5711)685 4093 Far(510)6b5-5321