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The relative depths to water measurements at WOS MW No 1 indicate the <br /> surface of the groundwater has varied as follows <br /> WOS Monitoring Well No.1 <br /> Date WL FT Elev of <br /> Measured below TOC Groundwater <br /> TOC= 57 54 Surface MSL* <br /> 12/21/00 4768 986 <br /> 3130101 4711 1043 highest elevation of water <br /> 119102 4964 770 <br /> 4/11102 4835 919 <br /> 6119102 4870 884 <br /> 9124102 51 15 639 <br /> 12/20/02 51 15 639 (note field recorded depth to water were the same <br /> for MW No 1 in 9102 and 12102 soundings) <br /> 3124103 4993 761 <br /> 619103 4961 793 <br /> 1 9123103 5275 489 lowest elevation of water <br /> 12/29/03 51 85 569 <br /> 3126104 5092 662 <br /> 6126104 5293 521 <br /> MSL`based upon Victor Fine Foods MW3A reference to Victor's DATUM and common reference mark on MW No 1TOC <br /> I <br /> CHEMICAL PARAMETERS <br /> Groundwater Quality <br /> The first groundwater sample (June 19, 2002) from MW No 4, located up-gradient of <br /> the general contaminated areas, was non detect, 3 months later it was 0 003 mglltr <br /> ' greater than the detection level of 0 050 mglltr for diesel and 6 months later <br /> (December) it was again below detection level of 0 050 mg/L <br /> Volatile fractions such as Benzene, Toluene, Ethyl-benzene and Xylene (BTEX) were <br /> again not detected in any sampled groundwater BTEX samples were collected and <br /> analyzed in the March and June 2003 sampling events As BTEX findings continued <br /> ' to be non-detect, and we requested and verbally granted discontinuance of BTEX <br /> sampling <br /> 1 Samples from MW Nos 1 through 3 and 6 indicate low levels of petroleum <br /> hydrocarbon contamination The hydrocarbon fraction where found in MW locations <br /> may be classified as "diesel" Grab samples (December 2000) from the bottom of <br /> bonngs BH Nos C-4/C-6 and C-5/C-7 indicated a lighter extractable C10-C-28 <br /> fraction The bonngs were grouted closed after collecting samples and could not be <br /> retested Chromatograms from laboratory analysis were submitted in the June 2002 <br /> interim report along with complete laboratory reports The most recent September <br /> • 2003 sampling laboratory findings are included herewith Reference ATTACHMENT <br /> 4, EXTRACTS FROM ANALYTICAL LABORATORY FINDINGS- December 2003 <br /> 3 <br />