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ou <br /> NEIL O. ARSON & ASSOC., INC. 22 ouston n <br /> GEOTECHNICAL SERVICES-ENGINEERING LABORATORIES <br /> Lodi, California 95240 <br /> Lodi (209) 367-3701 <br /> Stockton (209) 472-1091 <br /> FAX: (209) 333-8303 <br /> I <br /> April 1, 1996 <br /> Ms. Dorris Unsod <br /> Stockton Unified School District <br /> 1944 N. E1 Pinal Dr. <br /> Stockton, CA 95205-2551 <br /> Subject: Ground Water Testing <br /> California Trails Elementary School <br /> Fresno and Eight St. <br /> Stockton, California <br /> Our Job #: S9610 <br /> Dear Dorris: <br /> Per the request of Stockton Unified School District, ground <br /> water samples from the subject project were obtained and tested <br /> for a multiple range of contaminates. The purpose of the tests <br /> was to determine if potential ground water contamination from <br /> oche <br /> Puregro facility, located at 1904 W Charter Way, <br /> had reachedaffected the subject site. This letter and the attached copy of <br /> test results presents the results of the testing. <br /> The Puregro facility is located approximately 0.33 miles <br /> northwest of the subject site. It had come to the attention of <br /> the Stockton Unified School District that the facility was being <br /> investigated for possible ground water contamination. A Ms. <br /> Wendy Wyels of the Regional Water Quality Control Board was <br /> contacted and she indicated a range of substances for which they <br /> were testing for. It was proposed that ground water samples <br /> obtained from the site be tested for these substances. The list <br /> of actual substances is extensive, but following is a summary of <br /> the test methods used. These methods mainly test for a range of <br /> pesticides and soil fumigants: <br /> EPA 504 EPA 8150 <br /> EPA 601 Ammonia at N <br /> EPA 614 Nitrates <br /> EPA 619 Chloride <br /> EPA 632 Zinc <br /> Ground water samples were obtained according to the attached <br /> work plan, dated February 21, 1996. For approximate location of <br /> the test borings see the attached Location Map, Plate No. 1. <br /> A copy of all test results is attached. The results <br /> indicated that all substances tested for were non-detected except <br /> the following: <br />