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►� H I �I TECh ENTERPRiSESG MAY 2 1 2004 20 May 2004 `iUi`lwIEi1JT HEALTH To: Mr. Girish Patel P'R"V11T,'SERVICES St. Francis Motel 5708 North Highway 99 Frontage Road Stockton, CA 95212 (209) 931-3341 From: Edward W. Finucane,PE, QEP,CSP, CIH Subject: Report#040501-L-F,concerning the measured levels of toxic chemicals in the septic tank located at the rear(i.e., on the north east portion) of the property identified as: St. Francis Motel 5708 North Highway 99 Frontage Road Stockton, CA 95212 Sampling of the contents of the septic tank on the property listed above was completed on 5 May 2004. The analyses of the samples obtained were completed on 17 May 2004. These sampling and analytical efforts were accomplished by GeoAnalytical Laboratories, Inc. of Modesto, CA. The certi- fied results of their analyses have been included in the Appendix to this Report, and have been identi- fied as GeoAnalytical Laboratories,Inc. Report No. Q126-09. In every case, only exceedingly low concentration levels of five different solvent materials were determined to have been present in this septic tank. The following tabulation provides a summary of: (1) all of the previously listed non-zero solvent concentration results, (2) the septic tank's pH [i.e., its acidity /alkalinity], and(3) its likely sodium chloride salt concentration level: Table#1 —Contents of the Septic Tank No. EPA Method Analyte Detection Limit Actual Results 1 EPA 150.1 acidity/alkalinity ± 0.01 pH = 7.00 2 EPA 300.0 chlorides 0.1 mg/liter 120.0 mg/liter 3 EPA 8260B 1,4-dichlorobenzene 1.0 pg/liter 2.8 pg/liter 4 EPA 8260B toluene 1.0 pg/liter 117.0 pg/liter 5 EPA 8260B 2-butanone [MEK] 1.0 pg/liter 16.0 pg/liter 6 EPA 8260B 2-propanone [acetone] 10.0 pg/liter 35.0µg/liter 7 EPA 8260B p-isopropyltoluene 1.0 pg/liter 37.0 pg/liter Tests designated under EPA Methods 8260B employ a combination of gas chromatography and. quadruple mass spectrometry. Please note that the units of concentration listed for the various ana- lytes as results are"pg/liter',a unit that is,in effect,micrograms per kilogram,or,basically,parts per billion by wei ht or mass. Viewing these results from this perspective, it is clear that none of the listed non-zero results from this sampling is sufficiently high to cause any alarm; thus, it is my judg- ment that no additional remediation on the contents of these tanks is warranted at this time. The five solvent type chemicals that were determined to have been present in this septic tank appear to me to fall into three separate and distinct categories or classes. In general and in order,toluene and p-isopropyltoluene (aka p-cymene) are common components of most brands of gasoline; 1,4- dichlorobenzene (aka: p-dichlorobenzene and/or moth crystals) is a common insecticide; and ace- tone& MEK are common solvents—each of extremely low toxicity. These final two chemicals are found in a wide variety of commercially available cleaning and household products. In my judgment, it is very unlikely that any of these materials arrived in this septic tank from any aspect of the manu- facture of illicit drugs, particularly since I found no evidence at any location in the Motel Room 108 that volatile chemicals, acids or bases ofd type had been flushed into this septic system. In this regard, note that the pH of the septic tank was reported to have a perfect neutral value of 7.00. Telephone: Addre55: (209) 473-1113 Fax: (209) 473-1114 Poet OfficeBox7835 (800) 221-9595 E-mail:hi0htechted@jp5.net 5tockton,CA95267-0835