Laserfiche WebLink
� A <br /> AM <br /> Fourth Quarter 1992 Groundwater Monitoring Report <br /> Tri-Valley Growers, Thornton, California <br /> Page 2 <br /> xylenes (BTEX), and total petroleum hydrocarbons as gasoline (TPHG), by EPA methods 8020 <br /> and modified 8015, respectively <br /> No dissolved gasoline hydrocarbon constituents were reported at or above detection limits in <br /> either monitoring well <br /> Influent and effluent samples from the pumping well (MW4) were collected for analysis of <br /> BTEX and TPHG on January 4, 1993. Analytical results indicate a decrease in BTEX levels <br /> in the influent sample collected during this sampling round The concentration of TPHG <br /> remained constant The samples collected from carbon filter 1 (TVGT EFF IC)and carbon filter <br /> 2 (TVGT EFF2C) did not contain any detectable analytes during this sampling round Influent <br /> BTEX and TPHG concentrations over time are plotted on Figures 5 and 6 <br /> Laboratory analyses were performed by RESNA Environmental Laboratory (ELAP No 1211) <br /> The analytical results are summarized in Table 2, the laboratory reports and chain-of-custody <br /> documentation are presented in Attachment 2 <br /> RESNA personnel will continue with the quarterly monitoring program which will include <br /> reports detailing system performance We will continue to monitor system performance and <br /> adjust pumping rates as necessary If you have any questions regarding this project, please <br /> contact Bill Channell at our Escalon office (209) 838-3507 <br /> Respectfully, <br /> RESNA Industries, Inc <br /> !'12 air e� C <br /> Marcie R McCabe <br /> Staff Geologist <br /> Bill Channell <br /> Senior Geologist <br /> Gregory P Stahl <br /> CA Registered Geologist No 5023 <br /> MRM/ggk <br /> QItT$RLYI4QMR1992 FNL <br />