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TABLE 1 REGAL 604 GROUND WATER MONITORING DATA 1448 N EL DORADO STREET, STOCKTON CALIFORNIA MONITOR DATE ELEVATION DEPTH FLOATING GROUND TOTAL PETROLUEM HYDORCARBONS BTEX EPA METHOD 602 WELL R MEASURED AMSL TO FLUID PRODUCT WATER EPA METHOD 8015 MODIFIED ETHYL- IN FEET IN FEET IN FEET ELEVATIONGASOLINE KEROSENE DIESEL OIL BENZENE TOLUENE BENZENE XYLENE TOP OF BMSL CASING IN FEET PPM PPM PPM PPM PPB PPB PPB PPB 09/15/91 16 03 57 66 0 -41 63 NOT SAMPLED NO WATER IN WELL-WELL DRY 12/16/91 16 03 57 36 0 -41 33 c0 05 NR NR NR <0 3 <0 3 c0 3 <0 9 03/05/92 16 03 56 82 0 -40 79 <0 05 NR NR NR <0 3 <0 3 <0 3 <0 9 06/02/92 16 03 57 38 0 -41 35 <0 05 NR NR NR <0 3 c0 3 <0 3 <0 9 09/11/92 16 03 DRY 0 ERR WELL DRY AT MEASURED DEPTH OF 58 5' SURVEYED 10/01/92 15 09 12/07/92 15 09 58 62 0 -43 53 ONLY 0 15. OF WATER IN WELL, NOT ENOUGH TO SAMPLE 03/30/93 15 09 $6 5 0 -41 41 <0 05 NR NR NR <0 3 <0 3 c0 3 <0 9 06/16/93 15 09 53 75 0 -38 66 <0 05 NR NR NR <0 3 <0 3 <0 3 <0 9 09/15/93 15 09 55 54 0 -40 45 c0 05 NR NR NR <0 3 <0 3 <0 3 <0 9 12/30/93 15 09 53 65 0 -38 56 <0 05 NR NR NR <0 5 <0 5 c0 5 <O 5 02/16/94 15 09 52 0 /21/94 15 09 52 32 0 -37 23 c0 OS NR NR NR <0 5 <0 5 <0 5 c2 MW7 07/24/92 13 03 55 66 0 -42 63 <O 05 NR NR NR <0 3 <0 3 c0 3 c0 9 09/11/92 13 03 57 4 0 -44 37 c0 05 NR NR NR <0 3 <0 3 <0 3 <0 9 SURVEYED 10/01/92 12 09 12/07/92 12 09 57 34 0 -45 25 <0 05 NR NR NR <0 3 c0 3 <0 3 <0 9 03/30/93 12 09 53 75 0 -41 66 <0 05 NR NR NR <0 3 <0 3 c0 3 <0 9 06/18/93 12 09 NM 0 ERR <0 05 NR NR NR <0 3 <O 3 0 4 15 09/15/93 12 09 49 24 0 -37 15 <0 OS NR NR NR <0 3 <0 3 <0 3 <0 9 12/30/93 12 09 50 9 0 -38 81 <0 05 NR NR NR <0 5 <0 5 <0 5 <0 5 02/16/94 12 09 48 78 0 -36 69 <O OS NR NR NR <O 5 c0 5 c0 5 e0 5 07/21/94 12 09 97 27 4 -35 18 < NR NR < c0 5 < e2 AMSL ABOVE MEAN SEA LEVEL PPB PARTS PER BILLION UG/L NR NOT RAN BMSL BELOW MEAN SEA LEVEL SB SOIL BORING • Single peak-does not match PPM PARTS PER MILLION MG/L OR MG/KG MW MONITOR WELL typical gasoline pattern