Laserfiche WebLink
There is no data for #5, 46 or #9 for reasons discussed above. Changes in concentrations since <br /> the last sampling are summarized below: <br /> MW-1 - Benzene dropped from 0.3 mg/L to ND; toluene went from 0.6 mg/L to ND; <br /> ethylbenzene dropped from 0.5 ug/L to ND, and xylene dropped from 2.0 mg/L to ND. TPHg, <br /> TEPH, & oxygenates remain ND. The results of all sampling events are summarized on <br /> TABLE A. <br /> MW-2 - All compounds remain below detection levels. The results of all sampling events are <br /> summarized on TABLE A. <br /> MW-3 -Benzene increased slightly from 1.0 ug/L to 3.0 ug/L. Toluene, ethylbenzene & xylene <br /> remain below detection limits. TPHg dropped from 52 ug/L to ND. TEPH as motor oil, which <br /> was measured at 3590 ug/L in March, was ND in October. Oxygenates are also ND. The results <br /> of all sampling events are summarized on TABLE A. <br /> MW-4 - Benzene decreased from 1.0 ug/L in March to ND in October. Toluene remains ND. <br /> Ethylb6nzene dropped from 4.0 ug/L to ND. Xylene went from 3.0 ug/L to ND. TPHg <br /> decreased from 356 ug/L to ND. TEPH as diesel went from 2420 ug/L to 352 ug/L. <br /> • Oxygenates were ND. The results are summarized on TABLE B. <br /> MW-5 - This well, placed by Nomellini Construction Co., has not been sampled since <br /> November, 1996. It is being monitored by their consultant. The results of the sampling done by <br /> us are summarized on TABLE B. <br /> MW-6 - We have been unable to locate this well due to surface disturbance; it has not been <br /> sampled since November, 1996. We hope to have it's integrity restored this spring so that it can <br /> be included in the next round of sampling. The results of all sampling events are summarized on <br /> TABLE B. <br /> MW-7 - BTEX, TPHg, & TEPH have been below detection limits since the start of the project. <br /> MTBE has always been ND, and the latest analysis (EPA 8260) revealed that all tested <br /> oxygenates were also ND. Trichoroethene was detected from the the July, 1996 sampling, but <br /> was ND in November, 1996. That test (EPA 80 10) has not been run since. The results of all <br /> analyses are summarized on TABLE B <br /> MW-8 - Benzene decreased from 5.0 ug/L to ND; toluene levels remained the same at 1.0 <br /> ug/L; and ethylbenzene was ND in both samplings. Xylene increased slightly from 0.6 to 0.8 <br /> ug/L. TPH as gasoline increased from 187 to 224 ug/L, and TEPH continues to be ND. MTBE <br /> has always been ND, but during the latest sampling, TBA was detected at 46 ug/L. The other <br /> • oxygenates were below detection levels. Results are summarized on TABLE C. <br /> 2 <br />