Laserfiche WebLink
o E x s NEIL 0. DERSON & ASSOC., INC. <br /> �, ;'TJGEOTECHNICAL SERVICES-ENGINEERING LABORATORIES N Houston Ln <br /> Lodi, California 95240 <br /> a w Lodi (209) 367-3701 <br /> c Stockton (209) 472-1091 <br /> 4SS o C, FAX: {209) 333 8303 <br /> February 21, 1996 <br /> Work Plan for water Test Borings <br /> Stockton Unified School District California Trails Elementary <br /> Stockton, California <br /> Scope: <br /> Perform two test borings at locations shown on the attached <br /> map. Purpose of the test borings is to obtain water samples <br /> for conducting the EPA tests listed below. <br /> Procedure: <br /> 1 . Two 4. 5 inch diameter test borings will be made to <br /> approximately 5 feet to 15 feet below the ground <br /> surface. <br /> 2 . Test holes will be covered and left open at least 24 <br /> hours in order to let the ground water depth in test <br /> holes stabilize. The hole will then be purged 3 <br /> times and a ground water sample obtained by means of a <br /> bailer. <br /> 3 . Test holes will be backfilled with bentonite to at <br /> least 5 feet above ground water depth and then soil <br /> cuttings the remainder of the depth. <br /> 4. The following EPA tests will be conducted: <br /> EPA 614 EPA 619 zinc Chloride <br /> EPA 601 EPA 81--50 <br /> EPA 504 Ammonia as N <br /> EPA 632 Nitrates <br /> I b - � <br /> 7 � •' ' d <br />