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Addendum to Quarterly Groundwater Monitoring Report <br /> and Remediation Status Report dated August 21,1995 <br /> Moore Petroleum, 1399 E Yosemite Ave,Manteca,CA <br /> September 15, 1995 <br /> Page 4 <br /> On August 15, 1995 the vapor extraction system was pulsed on and frequent FID and flow rate <br /> measurements were taken to observe fluctuations in soil vapor hydrocarbon levels Inrttally, FID <br /> measurements indicated hydrocarbon levels at 13 parts-per-milhon by volume(ppm v) at a flow <br /> rate of 113 SUM The hydrocarbon levels dropped to 0 ppm v m approximately 29 minutes <br /> with a final flow rate of 90 SUM At this time, the system was once again turned off to be <br /> pulsed at a later date Results of this pulsing event are included as Table 4 <br /> TABLE 4: VAPOR EXTRACTION SYSTEM <br /> PUISE DATA. AUGUST 15,19 95 <br /> Irkt Stack Stack <br /> Tm3e FID vebcly Flow <br /> (pp* ($/n* (SCFM) <br /> 750 0 5300 113 <br /> 751 13 4300 92 <br /> • <br /> 752 6 4200 90 <br /> 753 4 4300 92 <br /> 754 2 4300 92 <br /> 755 2 4300 92 <br /> 756 15 mt measmred --- <br /> 757 13 not measured --- <br /> 758 13 4300 92 <br /> 7.59 09 mt measured --- <br /> 8-00 07 not measured --- <br /> 8101 05 not treasured --- <br /> 8-02 04 4300 92 <br /> 8.03 04 mt measured --- <br /> 8.04 03 mt measured --- <br /> 8-05 03 not measured --- <br /> 8-09 03 mt measured --- <br /> 814 02 int measwed --- <br /> 819 0 4200 90 <br /> SYSTFIVI TURNED OFF <br />