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Mr . Muniappa Naidu <br /> Page 4 <br /> Analytical Results <br /> The only analyte detected in the soil samples from the deeper borings was lead , at naturally- <br /> occurring background levels . TPHg and VOCs were not detected . The soil sample from the <br /> shallow boring contained a background concentration of lead and miniscule concentrations of <br /> TPHg (0 . 30 ppm) , xylenes (0 . 013 ppm) and p-isopropyltoluene (0 . 033 ppm) . No analytes <br /> were detected in the groundwater samples . <br /> Table 1 summarizes soil sample results and Table 2 summarizes groundwater samples results . <br /> The laboratory report is included at Attachment C . <br /> Conclusions <br /> Groundwater is not impacted and soil contains only de -niinhnus levels of certain hydrocarbon <br /> compounds . This follow-up sampling event confirms our previous conclusion that there had <br /> not been a significant fuel leak from the former UST . <br /> Recommendation <br /> No further investigation is necessary and we recommend that San Joaquin County EHD <br /> consider the UST to have been properly closed . <br /> If you have any questions or comments please contact Ground Zero at your convenience . <br /> Respectfully , <br /> Ground Zero Analysis , Inc . cp1iAlof <br /> Zlt4� �Fnlo <br /> o c <br /> GREGORY R <br /> Gregory P . Sta , PG No . 5023 No 5029 <br /> CA Certified Hydrogeologist No . 264 LP �Q <br /> qTF or Cp��F��� <br /> Figures <br /> Figure 1 : Site Location Map <br /> Figure 2 : Site Map with August 2019 and January 2020 Sampling Locations <br /> Tables <br /> Table 1 : Soil Sample Analytical Results <br /> Table 2 : Groundwater Sample Analytical Results <br /> Attachments <br /> Attachment A : Soil Boring Permit <br /> Attachment B : Field Notes <br /> Attachment C : Laboratory Report <br /> cc : Ms . Margo Bentz- Ivers <br /> Mr . Pat Riddle , Esq . <br /> Mr . Alan Buehler, RWQCB <br /> Additional UST Soil and GW Sampling Report <br />