Laserfiche WebLink
20 December 2001 <br /> AGE-NC Project No 01-0827 <br /> Page 3 of 8 <br /> and sampling port were also attached to the SVE operation A cumulative flow meter was installed <br /> downstream of the carbon canisters to monitor air flow <br />' The influent and effluent streams were monitored routinely for the presence of organic vapor using <br /> .. an organic vapor analyzer (OVA) equipped with a photo-ionization detector (PID Thermo <br /> Environmental 580A, 10 0 eV, calibrated to isobutylene) <br /> g <br /> in <br /> Samp lports were installed downstream of the vacuum blower inlet and prior to entry of the <br /> treatment vessels to recover SVE influent air flow vapor stream samples, and downstream, at the <br /> system exhaust of the carbon vessels to recover effluent SVE air flow samples to monitor the <br /> efficiency of hydrocarbon removal Field measurements, recorded at regular intervals between I l <br />' October and 15 November 2001, are summarized in Table I <br /> I24 SPARGE SYSTEM INSTALLATION <br /> A compressor-based EnviroSparge IAS system was installed at thesite on 03 August 2001 The <br /> compressor was connected to the sparge wells manifold using a one-inch diameter PVC pipe and to <br /> the two-inch diameter network via under ground piping The IAS system delivers 5 standard cubic <br /> feet per minute (scfm) at a pressure of 10 pounds per square inch, adequate to displace the static <br /> Iwater within each sparge well <br /> The EnviroSparge IAS system began full-scale operation on 11 October 2001 The IAS system was <br /> monitored and serviced over the first month of operation The dissolved oxygen in the ground water <br /> wells was not measured regularly during the week However, dissolved oxygen has shown a low to <br /> moderate increase in ground water wells since the initiation of the remediation system <br /> The s ar in flow rate was adjusted to approximately 4 5 to 5 scfm and to a pressure of 10 psi, to <br /> p g g <br /> minimize migration of the dissolved contaminants <br /> 1 <br />' 25 SVE START-UP <br /> The SVE system began operation on 1 I October 2001, when three-phase power was connected to <br /> the system from a temporary power pole located at the northwest corner of the site <br /> The initiation of the SVE operation was observed on 11 October 2001 by representatives of the San <br /> Joaquin Unified Air Pollution Control District (A.PCD) and of the City of Stockton The SVE unit <br /> • is operated in accordance with APCD permit N-3352-2 (Appendix B) <br />' Measurement of the SVE flow rate, vacuum (potential), concentrations of hydrocarbons in the <br /> Advanced Geolinvironmental,Inc <br />