Laserfiche WebLink
..gin':.. <br /> Walsh <br /> � t� Asyu�i�lES, Ing. r^ r,yy /1 <br /> 1,111'IYO11SSSiflElil SIIC IIIIti;S .and t:SSr lniZfti <br /> September 17, 1993 <br /> 1685-020 <br /> Mr. Russell Chapin <br /> Chapin Brothers, Inc. <br /> 1203 N. Carlton Avenue <br /> Stockton, California 95203 <br /> Subject: Interim Remedial Product Recovery Report <br /> 1766 Monte Diablo Avenue <br /> Stockton, California <br /> Dear Mr. Chapin: <br /> On August 6, 1993 Walsh & Associates, Inc. (WALSH) detected an unknown thickness {>_3 ft) <br /> of free-phase floating product(apparently gasoline) in the existing monitoring well at 1766 Monte <br /> Diablo Avenue in Stockton, California. After speaking with Mr. Harlin Knoll of San Joaquin <br /> County Environmental Health Division (SCEHD) on August 9 about the floating product, it was <br /> decided that interim remedial action was necessary to mitigate the contaminants. Initial interim <br /> remedial action included product bail down test procedures to evaluate the possible existence of <br /> free-phase product in the surrounding soil formation. <br /> TEST I <br /> On August 16, 1993, a geologist from WALSH arrived at the site to conduct product bail down <br /> test procedures. The apparent product thickness was calculated by measuring static liquid levels <br /> in the well. Depth to product was recorded at 21.64 ft below the top of the well casing; depth <br /> to water was recorded at 24.98 feet. The apparent product thickness was 3.34 ft (Table 1). <br /> A clear disposable bailer with an approximate 1-qt capacity was lowered through the air/water <br /> interface in the well casing and retrieved. The bailer contained only free-phase product. After <br /> removing approximately 3.5 gal of product, the approximate 3-ft column of liquid in the bailer <br /> contained contaminated water overlain by free-phase product. Following the removal of <br /> approximately 5 gal of liquid from the well, the depth to water was measured at 24.53 feet (0.45 <br /> #t higher). Because floating product commonly depresses the static water level, the 0.45-ft rise <br /> in water level was likely the result of removing the weight of the overlying product. <br /> West Coast Division: <br /> 1734 34th Street . Suite B . Sacramento, California . 95816 . Phone (916) 737-7240 . FAX (916) 737-72.45 <br /> Corporate Office: <br /> 4888 Pearl East Circle . Suite I08 . Boulder, Colorado . 80301-2475 . Phone (303) 443-3282 . FAX (303) 443-0367�� <br />