Laserfiche WebLink
G5010gtral7"echda Inc Page 6 <br />' Groundwater Monitonng Report <br /> Project No 723 2 <br /> • June 21,2006 <br /> 1 Well MW-101 did not contain petroleum hydrocarbon contaminants above the laboratory <br />' reporting limits <br /> 2 TPH-G <br /> • The shallow wells contained TPH-G concentrations ranging ND<50-- 16,000 ug/l <br />' o The highest level of TPH-G (16,000 ugll) was detected in well MW-5 that is <br /> located cross gradient of the former dispenser island <br />' o Up gradient well MW-9 did not contain TPH-G above the laboratory reporting <br /> limits This follows three consecutive events in which this contaminant was <br /> detected in this well <br />' o Down gradient well MW-8 contained 1100 ug/l TPH-G <br /> • The intermediate wells contained TPH-G concentrations ranging ND<50 - 98,000 <br /> ug/l <br /> o The highest level of TPH-G (98,000 ug/1) was detected in well MW-3 that is <br /> located in the vicinity of the former dispenser island <br /> o Up gradient well MW-109 did not contain TPH-G above the laboratory <br />' reporting limits This follows three consecutive events in which this <br /> contaminant was detected in this well <br /> o Down gradient well MW-108 contained 2000 ug/1 TPH-G <br /> • The deep wells contained TPH-G concentrations ranging ND<50 - 16,000 ug/l <br /> o The highest level of TPH-G was detected in well MW-208 that is located <br /> down gradient of the former dispenser island <br /> o Well MW-207 did not contain TPH-G above the laboratory reporting limits <br /> This follows six consecutive events in which this contaminant was detected in <br /> this well <br />' o Up gradient well MW-209 did not contain TPH-G above the laboratory <br /> reporting limits This well intermittently contained TPH-G for two of the <br />' preceding three sampling events <br /> • Deep well MW-201 did not contain TPH-G above the laboratory reporting limits <br /> 3 MTBE <br />' • None of the wells sampled contained MTBE above the laboratory reporting limits <br /> • EPA Method 8260B was utilized for this event <br /> 4 Benzene <br />' • The shallow wells contained benzene concentrations ranging <0 5 — 360 ug/l <br /> o The highest level of benzene was detected in well MW-5 that is located cross <br /> gradient of the former dispenser island <br />' o Well MW-9 defines the up gradient extent of the benzene plume <br /> o Down gradient well MW-8 contained 6 1 ug/l benzene <br /> • The intermediate wells contained benzene concentrations ranging<0 5 — 19,000 ugA <br />' o The highest level of benzene was detected in well MW-3 that is located in the <br /> core of the gasoline plume <br /> 1 <br />