ARCHIVED REPORTS_XR0002338 - Laserfiche WebLink

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General housekeeping activities previously requested by Ms . Meays were performed during March, 1994 . The activities involved the emptying and removal of drums containing well purge water , the introduction of the purge water into a storage tank located on other Pest&.na Trust property located across Grant Line Road at 2350 East Street , Tracy for biologicai degradation, the emptying of drums containing drill cuttings onto the on-site soil storage pile , and the removal of general refuse dumped at the site by unknown parties . COMPLIANCE MONITORING OF THE ON-SITE WELLS Sampling of the three on-site , 2-inch inside-diameter groundwater monitoring wells (MW-1 , MW-2 , and MW--3 ) was performed on September 30 , 1994 with the approval of Mr . Michael Infurna of San Joaquin County PHS/EHD. Depth to water and total well depth in each of the wells were measured using an electric tape and the volume of water within each well casing was computed. Each well was then purged using a clean , disposable, polyethylene bailer until the groundwater was free of significant sand, silt , and/or other grit , and temperature , pH , and electrical conductivity readings stabilized . In this case, over three . well volumes of water were removed from each well . Measurements acquired attendant to sampling appear on the well monitoring forms enclosed in Appendix A. Subsequent to the purging of each well , a groundwater sample was collected in a clean, disposable polyethylene bailer . Each sample was transferred into a one-liter amber glass sample bottles and two Volatile Organic Analysis (VOA) vials . Each sample container was promptly fitted with a teflon-lined screw cap , labeled, placed. on ice , and transported under chain of custody to Priority Environ- mental Lams of Milpitas , a California-state certified hazardous waste analytical laboratory . Analyses were subsequently performed for Total Petroleum Hydrocarbons as Diesel (TPH-D) using EPA Methods 3510/8015 , and Total Petroleum Hydrocarbons as Gasoline (TPH-G) , benzene , toluene , ethylbenzene , and total xylenes (STEX) using EPA Methods 5030/8015-8020 ( 602 ) . The sample acquired from well MW-1 was also analyzed for Total Chromium using EPA Method 7190 . Copies of the results of certified analyses as received from the certified are enclosed within Appendix A. These results are summarized and compared with previous sampling results in the followng table : Page 7