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Historical for Addresses with VOC' s detected: <br /> 92-3rd Qtr 92-2nd Qtr 92-1st Qtr 91-4th Qtr 91-3rd Qtr <br /> 11338 Harlan <br /> Trichloroethene NO 0.23 NO NO NO <br /> 11616 Harlan (5) <br /> Trichloroethene NO 0.42 NS NS NO <br /> 1 ,2 Dichloropropane ND 1.64 NS NS NO <br /> 342 Roth <br /> Trichloroethene 0.62 1.05 1.14 NO NO <br /> 427 Roth (1) <br /> Tetrachloroethene 0.35 0.57 1.28 NO 0.5 <br /> 707 Roth (2) <br /> 1,2 Dichloroethane 4.74 5.30 NO NO NO <br /> Lathrop WDP #5 <br /> Trichloroethene NO 0.42 (3) NS(4) NS(4) NO <br /> 124 Roth <br /> Tetrachloroethene 0.46 (6) NO ND NO NO <br /> 747 Roth <br /> Trichlorofluoro- 0.10 (7) NO NO NO NO <br /> methane <br /> NOTES <br /> (1) History prior to 3rd Qtr/1991 : 2nd Qtr 91 = NO, 1st Qtr 91 = 2.0 ug/L, <br /> 4th qtr 90 = 1.0 ug/L, 3rd Qtr 90 = NO, 2nd Qtr 90 = 1.0, 1st Qtr 90 = <br /> 2.0. <br /> (2) History prior to 3rd Qtr/1991 : 2nd qtr 91 = NO, 1st qtr 91 = 4.0 ug/L, <br /> 4th Qtr 90 = NO, 3rd Qtr 90 = 3.0 ug/L, 2nd Qtr 90 = 3.0 ug/L, <br /> 1st Qtr 90 = 3.0 ug/L. <br /> (3) First time TCE detected. <br /> (4) Not in Service. <br /> (5) Empty home (locked) , well not in use. <br /> (6) First time PCE detected. <br /> (7) First time Trichlorofluoromethane detected. <br /> c. GROUNDWATER TREATMENT AND RECEIVING WATER ANALYTICAL RESULTS. <br /> Summary and discussion of results are included in Sharpe' s <br /> Monthly National Pollution Discharge Elimination System (NPDES) Permit <br /> CA 0081931 Report. All parties to the Federal Facility Agreement are <br /> furnished a copy of this report. <br /> d. SAMPLING AND ANALYSIS CONTRACT <br /> Sampling and analysis contract was awarded October 1 , 1991, to <br /> Quality Assurance Laboratory (QAL) of San Diego, California. Option year on <br /> contract was exercised October 1, 1992. <br />