ARCHIVED REPORTS_ROY'S AUTO - HISTORICAL

Home Browse Search

SROM Ground Zero rina1ysis PHONE NO. 209 952 9892 Sep. 1 1996 03:34PM P2 GROUND =0 ANALYSIS$ INC. 2291 W. Dftrch Lara, sane 127D Stockton, CaliiferoU 95207 Telephones (209)982_3481 Fwihn&, (209) 952-9892 MEMORANDUM 1 fp j DATE: 09/11/96 TO: LISA BROWN & DOUG WILSON FROM; GREG STAHL SUBJECT: SAMPLING PLAN, ROY'S TOWING, 3570 E. MINER, STOCKTON, CA Having reviewed the 1988 DHS sampling report for the property and the 1991 Kaldveer Associates report for the Caltrans right of way we make the following observations and propose a sampling plan as outlined below: Backeround + DHS personnel observed apparent soil staining,primarily in the general vicinity of the warehouse/office building and the mechanic's shop. Some soil samples collected from the surface at these locations contained elevated concentrations of petroleum hydrocarbons and/or lead. A sample collected from the sump inside the warehouse contained elevated concentrations of lead and petroleum hydrocarbons. a Kaldveer's sampling of the Caltrans ROW indicated elevated concentrations of petroleurn hydrocarbons (primarily oil range, TRPH) in near surface soil (1 ft depth) in front of the mechanic's shop. Equivocal evidence of minor petroleum hydrocarbon contamination (TRPH&TPHd) was also reported In several soil samples collected from various locations across the ROW. TRPH was not detected in samples collected from depths of 4.5 ft. One sample, collected in front of the mechanic's shop at a depth of 1 ft, contained elevated concentrations of lead. This also was the only sample with detectable TEX constituents. No benzene was detected. + Ethylene glycol was not detected in any sample from Roy's Towing or the Caltrans ROW. "Very low levels of methylene chloride and Freon 11 were reported in a number of samples collected from the Caltrans ROW. The source of the methylene chloride was most likely in the laboratory. The source of the Freon 11 ,may possibly have been the Laboratory.