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1 <br /> lie <br /> r Eckert Cold Storage Company <br /> 757 Moffat Blvd., Manteca, California <br /> Quarterly Groundwater Sampling Report <br /> t March, 2000 <br /> Narrative <br /> On March 27, 2000, GeoAnalytical Laboratories, Inc., conducted field measurements, <br /> well pumping and groundwater sampling on five (5) groundwater monitoring wells <br /> located at this site (Figure 1, 2A & 2B). The on-site domestic well was also sampled <br /> ' during this event. <br /> Groundwater elevations were taken from seven (7) wells prior to pumping (Table i & <br /> ' Appendix B). All monitoring wells were evacuated by means of a steam-cleaned, <br /> stainless steel bladder-type pump, except MW-2, MW-5, and MW-7. MW-2 will be <br /> . incorporated into the next quarter monitoring event. MW-5 had a bent casing that needed <br /> repair and therefore, sampling could not be conducted on this well. MW-7 appeared to <br /> be vandalized as there was debris in the casing. On April 14, 2000, Frontier Drilling, <br /> under the direction of WHF repaired MW-5 and removed the material from MW-7. <br /> ' <br /> Upon reviewing the field logs for this sampling event a six (6) foot difference in the <br /> groundwater elevation was observed between MW-4 and MW-5. A variation this great <br /> ' has never occurred during past sampling events. WHF felt that it was necessary to re- <br /> measure the groundwater depth at this site to confirm the accuracy of the measurements. <br /> ' The wells were re-measured on April 25, 2000. At the time of re-measure, WHF also re- <br /> surveyed MW-5 due to the repairs on April 14, 2000. The groundwater gradient and <br /> direction were calculated using the measurements collected on April 25, 2000. <br /> ' During the three (3) volume pump down of each well, samples were collected to measure <br /> field pH, electrical conductivity and temperature (Table 3 & Appendix B). Once stability <br /> ' was achieved, a minimum of three (3) well volumes was removed and samples were <br /> collected with disposable bailers. The samples were then labeled and placed in an ice <br /> chest cooled with Blue Iceg_ <br /> ' T'he samples and trip blank were then logged on a Chain of Custody and transported to <br /> s the State-certified laboratory, GeoAnalytical Laboratories, Inc., in Modesto, California. <br /> ' The analyses requested for the water samples was EPA method 602 for BTX&E <br /> (Benzene, Toluene, Xylene, and Ethyl benzene) and MTBE (Methyl t-butyl ether), EPA <br /> method 5030/Luft (GCFID) for Gasoline, and EPA method 35101Luft for Diesel. MTBE <br /> ' contamination was confirmed by EPA method 8260. The domestic well on-site was <br />