2016-09-16_PERMIT FILE - M2016010

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Before the Survey—Transit Mix Concrete Co. will send notifications by certified mail to neighbors at least 30 days prior to any blasting being conducted on site. The survey will be complimentary to the neighbor and will be conducted by an independent third parry consulting firm that specializes in pre-blast surveys and blast monitoring. Included in the notification will be a description of the process that will take place on the day of the inspection, what the inspector will be looking for, and how the inspection will be documented. Also included with the notification will be a survey response form that each neighbor will complete and send back to Transit Mix Concrete Co. This form will be used as consent to complete the survey or as statement by the landowner declining the survey. A lack of response will be deemed to indicate their declining participation in the survey. Once the form is returned and a survey requested, a representative from the independent blasting consulting firm will contact the neighbor to schedule a date and time to complete the survey. Transit Mix Concrete Co. recommends that the landowner collect any documents relevant to the structures or wells that will be evaluated; these may include date and details on the structure construction and well drilling and completion reports. A copy of the Pre-Blast Survey notification is included in Appendix A. During the Survey—On the day of the survey the representative from the blasting consulting firm will arrive on the property, introduce themselves, and conduct the inspection. Any available documents will be reviewed at the start of the survey. The consulting representative will have a still photo camera and a video camera. The representative doing the inspection will photograph and video document, with voice comments,the exterior and interior of all structures located on the property. They will document the existing condition of all walls, doors, ceilings, windows and floors. The survey will include all levels of the structure including the basement and foundation. Areas that cannot be accessed during the inspection will be noted. The current conditions of the structure will also be recorded in the form of notes and sketches on a standard inspection form used by the consulting company. In addition to the structure inspection, the representative will also assess the condition of any water wells within the established distance. If the well is accessible,this will include measuring the water level in the well and conducting flow rate testing. The flow rate testing will involve pumping the well for a minimum of 15 minutes to determine the well production rate and water level. Water level measurements will not be performed if the well is not accessible. Flow rate testing will be performed if there is a spigot between the well and cistern/pressure tank. The surveyor will also collect a water quality sample. If the well production can be tested, then the water quality sample will be collected after the well production test from the pumped flows. Transit Mix Concrete Co. may work with the landowner to have the surveyor open the well for testing, and this work may include removing the pump from the well. Regardless of well accessibility, a water quality sample will be collected from the spigot closest to the well and/or cistern. A minimum of 1 gallon of water will be discharged prior to collecting the sample. The water quality monitoring parameter list is based on Domestic Water Supply numeric standards established by the Colorado Department of Public Health and Environment and public comments. This list is included as Table 1. The water sample will be sent to an independent Colorado state certified lab that will test for water quality.