Laserfiche WebLink
Table 2. Groundwater Monitoring Well Chemical Data,December,2001 <br /> Sample TPHD+ TPHG Ben Tol Ethyl Xyl , TBA MTBE DIPE ETBE TAME 12 EDB <br /> DCA <br /> # u u u u u u u u uO ugA UO UEA Ugfl <br /> MW-1 ND ND ND ND ND ND ND ND ND ND ND ND ND <br /> MW-2 ND ND ND ND ND ND ND ND I ND ND ND ND ND <br /> MW-3 170 ND ND NDIND <br /> ND ND ND ND ND ND ND ND <br /> OW-1 ND ND ND ND ND ND ND ND ND ND ND ND <br /> OW-2 ND ND ND ND ND ND ND ND ND NDrO <br /> Blank ND ND ND ND ND ND ND ND ND ND ND ND Z+-Hydrocarbon reported in the diesel range does not match the diesel standard. <br /> Discussion <br /> The sample results show that only TPHD contaminants were observed only in MW-3 <br /> (170ug/L). All other contaminants were ND (none detected) for this monitoring period. <br /> Conclusions and Recommendations <br /> Sample analysis of the three monitoring wells and water wells show that contaminants <br /> were detected(TPHD) only in MW-3. It is Wright's understanding that the off-site water <br /> ,law/ well has not been used for drinking water, and that the off-site wells are used for concrete <br /> aggregate mixing. Some water is used in lavatories on the M&M Builders property. In <br /> our opinion, due to none detected amounts further testing of the off-site water wells is not <br /> warranted at this time. <br /> Wright recommends that a quarterly monitoring program for TPHG, TPHD and BTEX <br /> and MTBE and oxygenates be performed for the next three quarters. If concentrations <br /> continue to show very low, stable and/or none detected levels; Wright will request that <br /> site closure be considered after the fourth quarter. <br /> Limitations <br /> This report has been prepared specifically for M&M Builders site at 8111 West Eleventh <br /> Street in Tracy, CA and was done according to the State and local agency suggested <br /> guidance documents for these investigations. The interpretations, conclusions and <br /> recommendations made herein are based on professional judgment of the data and <br /> analysis for the soil and water samples collected on-site and should be reviewed in the <br /> context of this report and other site reports. Wright Environmental Services, Inc. is not <br /> responsible for errors in laboratory analysis and reporting, or for information not available <br /> during the course of the study, and no warranty or guarantee is expressed or implied <br /> therein. <br /> Nee 3 <br />