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Table 1 <br />. HISTORICAL GROUNDWATER ANALYTICAL RESULTS AND MONITORING DATA <br /> CHEVRON SERVICE STATION NO 9-0342 <br /> 1347 SOUTH EL DORADO STOCKTON,CALIFORNIA <br /> WELL ID/ ETMYL— FECAL <br /> ELEVATION BENZENE TOLUENE BENZENE XYLENES TPH—G COLIFORM DTW SPT WTE <br /> ff-0 DATE b b b b b m n feet feet feet <br /> MW-1 <br /> 1166 08/20/90 05 NO NO NO 810 — 4059 0 DO —2893 <br /> 01/09191 NO 08 NO NO 180 —— 4286 000 —31 20 <br /> 04/05/91 NO ND ND 10 96 -- 4335 000 —3169 <br /> 07/25/91 NO ND ND 07 68 4433 000 —3267 <br /> 10/29/91 NO ND NO NO ND — 4526 000 —3360 <br /> 01114/92 NO ND NO ND ND = 4529 000 —3363 <br /> 05/04/92 -- -- -- -- -- -- 4387 000 —3221 <br /> 07/22/92 NO NO NO NO 82* - 4542 000 —3376 <br /> 10/26/92 —— — —— —— —— —— 4696 , 000 —3530 <br /> MW-2 <br /> 1209 08/20/90 NO NO NO _ND ND - — 4081 000 —2872 <br /> 01/09/91 NO NO NO NO ND —— 4298 000 --30 89 <br /> 04/05/91 NO NO NO NO NO -- 4350 000 —3141 <br /> 07/25/91 NO NO NO NO NO - 4457 000 —3248 <br /> 10/29/91 NO NO NO NO NO -- 4548 000 —3339 <br /> 01114/92 NO NO NO NO NO — 4547 000 —3338 <br /> 05/04/92 -- -- -- -- -- 4410 000 —3201 <br /> 07/22192 ND NO NO NO NO 4567 000 —3358 <br /> 10/26/92 — — -- —— -- -- 4720 000 —3511 , <br /> MW-3 <br /> 1191 08/20/90 890 9 68 14 15000 —— 3941 000 —27 50 <br /> 01103/91 is 23 2.2 49 380 —— 4313 000 —3122 <br /> 04/05/91 8 07 1 3 170 —— 4364 0 DO —3173 <br /> 07125191 15 NO 1 0 25 190 ND 4457 000 —3266 <br /> 10/29/91 63 08 25 35 360 —— 4551 000 —3360 <br /> 01114/92 14 38 68 95 780 -- 4552 000 —33.61 <br /> 05/04/92 57 37 11 26 520 - 4413 000 —3222 <br /> 07122/92 NO NO S5 4,4 230 4565 0 00 —33 74 <br /> 10/26/92 30 05 20 30 450 — 4718 000 —3527 <br /> MW-4 <br /> 1181 07/25/91 NO NO ND NO NO 220 4456 000 —3275 <br /> 10/29191 NO ND NO NO NO —— 4552 000 —33 71 <br /> 01/14/92 NO ND NO NO NO — 4551 000 —33 70 <br /> 05/04/92 22 NO 06 1 7 120 — 4409 0 00 —3228 <br /> 07/22/92 NO ND NO NO NO —— 4564 000 —3383 <br /> 10/26/92 ND NO. NO . Npi NO — 4720 000 —3539 <br /> EXPLANATION <br /> Ail elevations are given in feet relative to mean sea level <br /> TPH--G =Total Petroleum Hydrocarbons as Gasoline(ppb) <br /> * = Chromatograph does not match typical gasoline pattern <br /> SP= Separate—phase petroleum hydrocarbons <br /> DTW= Depth to water <br /> SPT= Separate—phase hydrocarbon thickness <br /> WTE =Water table elevation <br /> TOC=Top of casing <br /> ppb= parts per billion or micrograms per Inter Ng/L <br /> mpn = most probable number per 100 mdlilder <br /> NO = Not detected at or above the minimum quantitation limit <br /> = Not analyzed,not sampled <br /> NOTE See laboratory reports for minimum quantitation limit <br /> GARTABI WKt <br /> 'tel_I�i GROUNDWATER <br /> � ,TECHNOLOGY <br />