Laserfiche WebLink
M. <br /> ERR <br /> RMER <br /> December 16, 1936 AGS 86102-1 <br /> Beacon Service Station #3-492 - Manteca, California <br /> Because some product odor was detected in soil samples from <br /> goring B-1 (MW-1) and B--2 (MW-2), and ground water analyses from <br /> these wells indicate benzene concentration above drinking water <br /> standards, we recommend that the water in the three wells be <br /> subjectively monitored to assess possible changes in hydrocarbon <br /> concentration. ':Lis monitoring should be conducted for a period <br /> of six months tr, evaluate possible contaminant .trends. <br /> Applied GeoSystems will conduct the monthly subjective analyses <br /> which will include field examination of water samples. A <br /> t. relatively undisturbed water- sample collected at the air/water <br /> interface in each well will be examined for evidence of floating : <br /> product, petroleum odor, sheen, and emulsion. We further <br /> recommend that the wells be <br /> purged, resampled, and analyzed for <br /> `�. <br /> total hydrocarbon and hydrocarbon constituent. levels after six <br /> months. These samples will be analyzed by EPA method 602 for <br /> total volatile hydrocarbons. <br /> r� <br /> The information obtained from the six month sampling period may <br /> s show a trend for .the ground water quality at the site. Possible <br /> recommendations for water treatment will be made based on this <br /> trend. <br /> - 12 <br />