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i M mom r TABLE 2 SAMPLE RESULTS Tosco 76 Service Station 5886 2701 March Lane Stockton California (Page I of 1) Extraction Well Date Time Sample ID B T X ` E TPPHg MTBE TPPHg** MTBE** i Background Soil Vapor and Water Samples ugll > lbs lbs; MW2 5110/99 1051 A-INF MW2 ND 006 ND ND ND ND• 1055 W-6 MW2 ND ND ND 1100 A-INF MW3 ND ND ND 6 900l8100* MW3 ND ND ND ND 0 55/0 26* 1115 W 6-MW3 ND ND ND ND ASISVE Test Soil Vapor Samples ND 53 D00/38,000* MW3 5110/99 1320 A INF MW3 02 023 ND DIS 19 54135* 1800 A-INF-MW3 ND ND ND ND Nb 206 0007 002 MW3 5/11199 800 A-INF MW3 ND ND ND ND ND 307 1800 A-INF MW3 ND ND ND Nb ND 285 a 0 032 MW3 5/12/99 800 A INF MW3 ND ND ND ND ND 182 1000 A INF MW3 ND ND ND ND ND 227 0 0007 MW2 5112/99 1100 A INF-MW2 Nb ND ND ND ND 11 1400 A INF-MW2 ND ND ND ND ND 102 0 0002 MW6 5/12/99 1500 A-INF MW6 ND 0 189 ND ND ND 1 [I 1715 A INF-MW6 ND ND ND ND ND ND a D Notes Total lbs removed during SVE testing 0007 0 061 Time Time is presented using a 24 hour clock Total lbs of TPPHg and MTBE removed 0 068 A-INF-MW2 = Influent air sample collected while extracting from MW2 W 6-MW2 Water sample collected from 6 feet below ground surface from MW2 TPPHg = Total purgeable petroleum hydrocarbons as gasoline analyzed using EPA method 8015 i 13TEX Benzene,Toluene,Ethylbenzene,and total Xylenes using EPA method 8020 MTBE — Methyl tertiary butyl ether using EPA method 8020 ugll = Micrograms per liter * — Methyl tertiary butyl ether using EPA method 8260A ** = Pounds removed calculated using ERI S standard o eratin lbs = P 8 Procure(SOP)25"Hydrocarbon Removal From a Vadose Well{Attachment A) Pounds ND = Not detected at or above the stated laboratory detutton limit