Laserfiche WebLink
' Report-Soil and Groundwater Investigation <br /> Herman&Helen's Marina <br /> September 26, 1995 <br /> ' Page 7 <br /> TABLE 2 <br /> ' Laboratory Results (Groundwater/Hydropunch - August 1995) <br /> B T E X TPH- TEPH <br /> G <br /> ' Detection 0.3 0.3 03 0.6 0.05 0.05-0.5 <br /> Sample I.D. Limits: µgn' µg/L µg/L µg/L mg/L mg/L <br /> 1432-HPI-8/22/95 3.2 14 5.5 26 0.22 0.79 (diesel) <br /> 1432-HP2-8/22/95 0.4 1.3 ND 8.7 ND 0.57 (diesel) <br /> ' 1432-HP3-8/22/95 (#) 260 ND 8.4 36 1.0 0.24 (diesel) <br /> UnitConversions: <br /> µg :parts per billion(ppb) B,T,E,X =benzene,toluene,ethyl benzene, and xylene. <br /> ' mg/L:parts per million(ppm) TPH-G=total petroleum hydrocarbons, quantified as gasoline. <br /> TEPH=total extractable petroleum hydrocarbons,quantified as diesel, <br /> motor oil,and kerosene. <br /> ND=none detected at or above the reported laboratory detection limits. <br /> ' #=detection limit raised due to gasoline interference. <br /> ' 4.0 RECOMMENDATIONS <br /> Based on the information gathered during this investigation, the limits of gasoline and diesel <br /> ' contamination have not yet been established. Several of the hydrocarbon constituents detected in the <br /> capillary fringe and groundwater exceed State and Federal water quality criteria. The California Code <br /> ' of Regulations, Title 22, Drinking Water Regulatory Criteria, and the U.S EPA Health Advisories have <br /> designated maximum contaminant levels (MCLS) for benzene, toluene, ethyl benzene, and xylene in <br /> ' drinking water. The MCL for benzene (1.0 µg/1) was exceeded in HP-1 and HP-3. The remaining <br /> constituents are below their respective MCL's. The taste and odor threshold for gasoline is 5.0 µg/1, <br /> ' which was exceeded in each of the groundwater samples. The taste and odor threshold for diesel <br /> (100 ltg/1) has also been exceeded in each of the groundwater samples. These criteria were <br /> ' established by the California Regional Water Quality Control Board (CRWQCB) and the U.S EPA for <br /> existing or potential sources of drinking water. <br /> ' Prior to implementation of a site remediation system, Condor recommends that additional work <br /> ' be conducted to investigate the extent of the hydrocarbon plume. Condor recommends that five (5) <br /> Geoprobes be placed around the site to investigate the lateral extent of gasoline and diesel <br /> ' contamination. The Geoprobes are small diameter, hydraulic-push, sampling points used for the <br /> r• <br /> ' �ai' CONDOR <br />