Laserfiche WebLink
.a.. �'� ' -PRIMRR <br /> • � .. .:� E � * dC` c5� 6�'; ac:` ""_ ai^ -e• .+„+:� `�-....,.'p -r.p .�, ""L., ..+]T-_ �� t <br /> w � <br /> .ra' � s.. ,.o- `t� ,`F �,�,'#r�r t.r '�aR ' r'C* _ � '�a�+ A3 >r�•' '� a€' r� r 3.,wt 'a�'�+ F� M-r�s x r <br /> a <br /> Y <br /> ry r <br /> i.l <br /> �• themselves, preventing additional fluid flow through them. Tests have shown that this self <br /> ~` seaHng capability of the BAT' septa is maintained after hundreds of punctures. <br /> The initial fluid sample collected at a given location is considered a system purge. A number <br /> of subsequent samples will be collected once Cie probe is in place at the desired depth and <br /> purged. The BATTM system can thus be used as a permanent groundwater monitoring point <br /> by leaving the probe assembly and riser pipe in the ground and sampling periodically; or it <br /> can be installed repeatedly at different locations. In case the groundwater surface drops, as <br /> is common in California in the last five years, the CPT rig can be mobilized and a permanent <br /> BATrN probe installation can be driven deeper until it is below the current groundwater <br /> surface. <br /> The BAT'groundwater samples will be collects: using 35-m1 glass sample vials. <br /> To reduce the risk of personnel exposure to possible hazardous substances, all downhole <br /> equipment will be automatically-decontaminated using a specially designed enclosed chamber <br /> f� • <br /> .` underneath the rig containing scrubbers and hot water spray nozzles. As the string of CPT <br /> push pipe (or BATm riser pipe)is being pulled out of the ground, it will be passed through <br /> this chamber before being handled by personnel inside the cone penetrometer rig. <br /> Pressurized hot water will be supplied by a steam cleaner to feed the chamber's spray <br /> nozzles. All rinsate will be contained inside the chamber, andum <br /> p ped out to a 55-gallon <br /> drum for disposal. Approximately one drum will be filled every two days on site. <br /> 2.4 AIR MONITORING DURING TESTING OF SAMPLING <br /> Ambient air will be monitored during all testing and sampling activities. An organic vapor <br /> analyzer(OVA)will be used to monitor concentrations of total organic compounds in the <br /> breathing space at worker chest level. Air monitoring concentrations will be recorded on the '! <br /> " sampling logs. If sustained ambient air concentrations exceed 5 ppm above background <br /> 0:191503M0119.0123SL 6 <br /> » <br /> .t <br />