ARCHIVED REPORTS_XR0002604 - Laserfiche WebLink

Home Browse Search

1 4.0 FINDINGS The results of the groundwater sampling indicate the following 1 g p g g • The groundwater gradient is consistent with past monitoring events Thegradient indicates a eastern gradient direction with a slope of approximately 0 00006 inches perfoot Groundwater has risen in elevation four to five inches since the 1 last monitoring event • Six sampling events have been performed on the newly installed wells, MWO-1, MWO-2, MWO-3 and MWO-1X Shallow borings MWO-1 and MWO-3 were non detect for MTBE and MWO-2 had a detection of 32 ppb indicating some 1 limited offsite migration Deep well MW0-1 X has increased this quarter having levels of 780 ppb MTBE 5.0 CONCLUSIONS 1 Based on the above findings, Avalon concludes the following • The rise in water level this quarter may account for the increase in contaminant levels • 6.0 RECOMMENDATIONS 1 Based on the above conclusions, Avalon recommends the following • This reportshould be forwarded to the Public Health Services San Joaquin County and the Regional Water Quality Control Board Central Valley Region 1 (RWQCBCVR) for their review 7.0 ASSESSMENT LIMITATIONS The scope of this report is limited to the matters expressly covered This report is 1 prepared for the sole benefit of Joes Truck Plaza, and may not be relied upon by any other person or entity without the written authorization of Avalon In preparing this report, Avalon has relied on information derived from secondary sources and personal interviews Except as set forth in this report, Avalon has made no 1 independent investigation as to the accuracy and completeness of the information derived from secondary sources of personal interviews, and has assumed that such information is accurate and complete 1 •j Avalon Environmental Consultants Protect#9627-001-15 Joes Truck Plaza 15600 South Harlan Road May 23, 2003 9 Lathrop, California 1